DEPARTMENT OF CONSTRUCTION MANAGEMENT FACULTY OF TECHNOLOGY MANAGEMENT & BUSINESS UNIVERSITI TUN HUSSEIN ONN MALAYSIA (UTHM) MPC 10303 CONSTRUCTION TECHNOLOGY CASE STUDY MRT CONSTRUCTION PROJECT GROUP MEMBERS Name Matric No. Yusuf Hussein Osman HP170037 Yahya Mohsen Yahya Al-Tawil GP170161 Mohammed Faez Salem Baqader GP180007 Mohammad Khir Ismaail Triter GP180012 Yaser Abdulwahab Ali Alsaeedi HP170102 Abdulwali Muse Mohamed GP180108 Lecturer’s Name: DR. HAMIDUN MOHD NOH Date: 30/12/2018 Table of Contents 1.0 Introduction ............................................................................................................. 1 2.0 Background of MRT ............................................................................................... 1 3.0 Advantages of Technology Implementation in Tunnel Construction ..................... 2 4.0 Challenges of Technology of Implementation in Tunnel Construction .................. 5 4.1 Why Tunneling .................................................................................................... 6 4.2 Why Go Underground ......................................................................................... 7 4.3 Malaysia’s Tunneling Technology Challenges of MRT ................................... 7 4.4 Karstic Limestone ................................................................................................ 9 4.5 Kenny Hills........................................................................................................ 10 4.6 Granite ............................................................................................................... 10 5.0 5.1 Case Studies .......................................................................................................... 11 Comparison of Taipei MRT and Kaohsiung MRT ........................................... 11 5.2 Door Warning Lights in Taipei MRT Construction and Warning Sirens in Kaohsiung Construction ............................................................................................... 12 5.3 Safety Facilities ................................................................................................. 12 5.4 The Convenience of Handrails .......................................................................... 12 5.5 Definition of Interface ....................................................................................... 13 5.6 The Analysis of Construction Interface Management ....................................... 14 6.0 Discussion of case study among construction parties ........................................... 15 6.1 Suggestions for the critical interface problems ................................................. 16 6.2 MRT - More Convenience or Waste ................................................................. 18 7.0 Conclusions ........................................................................................................... 19 8.0 Reference............................................................................................................... 21 9.0 Appendix ............................................................................................................... 22 9.1 Appendix A: Photos of M RT .......................................................................... 22 9.2 Appendix B: Drawing of M RT ....................................................................... 25 1 1.0 Introduction The KVMRT is part of the Greater Kuala Lumpur and Klang Valley (GKV) initiatives under the Economic Transformation Programme that are targeted to contribute RM190 billion in gross national income (GNI) over the next 10 years and create over 300,000 jobs. The KVMRT project is one of the Entry Point Projects (EPP) aimed at transforming the Greater Klang Valley into the world’s top 20 most liveable metropolis by 2020. Spanning 141km, the KVMRT’s three lines are expected to serve areas within a radius of 20km from city centre. The 51km line will comprise an underground line of 9.5km and a total of 31 stations, of which seven will be underground. It is expected to serve an estimated population of 1.2 million. Each train serving the line will have four coaches with a total capacity of 1,200 passengers. It is expected to ferry approximately 400,000 passengers daily. The trains are expected to run at an interval of 3.5 minutes. The first line, the Sungai Buloh-Kajang (SBK) Line, which will begin from Sungai Buloh through the city centre and ending in Kajang, will be fully operational from July 2017. “The SBK Line will be completed in two phases. The first, from Sungai Buloh to Semantan, is scheduled to be up and running by the end of 2016, while phase two from Semantan and Kajang (will start running) from July 2017,” said Amir. “So far, everything is on track.” 2.0 Background of MRT The MRT Sungai Buloh-Kajang Line is the first of the three planned Klang Valley Mass Rapid Transit lines to be constructed, with estimated contract value of MYR36 billion. The line starts from Sungai Buloh which is located to the north-west of Kuala Lumpur, runs through the city centre of Kuala Lumpur, and ends in Kajang, a fast developing town located to the south-east of Kuala Lumpur. The line serves a corridor with an estimated population of 1.2 million people. 2 Phase One of the MRT Sungai Buloh-Kajang Line from Sungai Buloh to Semantan had become operational at the end of 2016 while Phase Two from Semantan to Kajang will become operational by July 2017, allowing trains to serve the entire line. Part of Phase one, between Sungai Buloh and Semantan, commenced service in December 2016. Announced in 2006, the line was initially planned as a LRT at 43 km in length, linking the densely populated areas of Damansara in the northwest and Cheras in the southeast, through the central business district of Kuala Lumpur city. The government then decided to extend the alignment at both ends to Sungai Buloh and Kajang respectively, adding 8 km to the line for a total of 51 km. In addition, the line was changed to an MRT system, with higher capacity trains. The line operated by a subsidiary of Prasarana Malaysia Berhad, Rapid Rail Sdn Bhd. 3.0 Advantages of Technology Implementation in Tunnel Construction “AS Malaysia's single largest infrastructure project, the Klang Valley MRT has truly captured the imagination of the people. The vision of seamless interconnectivity with the many train lines within the city, will soon become a reality. People from far ends of the Klang Valley will be able to make appointments in the city and have the certainty of making it on time, come rain or sunshine” Tan Sri Sidek Hassan (Chairman) said that. The MRT will bring many benefits. At its very core, the MRT promises to get people to their destinations with greater efficiency, reliability and much less stress. But it will bring much more than that. Its multiplier effect will be seen in construction, jobs generation, reducing pollution and in increased economic activities particularly along the alignment. The eventual winners will be the people, with Kuala Lumpur becoming even more liveable and Malaysia more competitive. (a) Tunnel boring machine (TBM) On the SMART project, while the low density bentonite slurry based face support did work while traversing minor fissures and filled cavities encountered in the karst, there were incidences of surprise sinkholes and blowouts, and there had to be a much more sophisticated slurry machine to deal with this problem in MRT tunnel. (TBM), is a 3 machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They may also be used for microtunneling. The TBM used as an alternative to drilling and blasting (D&B) methods in rock and conventional "hand mining" in soil (Tunnel, 2017). TBMs have the advantages of: Limiting the disturbance to the surrounding ground and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in heavily urbanized areas. The Variable Density TBM allows for the density of the slurry which it uses to be thickened, which allows for better control of the slurry face pressure when excavating through karstic limestone, thus minimizing the risk of slurry blow-outs and sinkhole formation. The success of the Variable Density TBM – five were used to excavate the tunnels for the MRT Sungai Buloh-Kajang Line - was proven as it resulted in a 95% reduction in the incidence of sinkhole formation when compared with tunnelling for the SMART Tunnel under the same geological conditions Figure 1: TBM Machine (b) Steel Fiber Reinforced Concrete (SFRC) Steel Fiber Reinforced Concrete precast segment was used in this project tunneling work. SERC widely used as the fiber reinforcement is inessential for integrity, quality, production and safety. The quality requirement of the SFRC precast segment has increased as part of the design life on the tunnel itself (Razak & Ismail, 2015). 4 Cracks on the SFRC precast segment has been recorded as the lowest defects on the tunnel lining, affected only on 44 segments out of 17,280 segments install for section 1 tunnel. Although it is the lowest numbers of defect recorded, cracks on the precast segment are considered a major type of defects and required a high attention the rectification works. (c) Temporary earth retaining system The selection of retaining wall has considered the workability and suitability of subsoil and rock conditions. Secant pile wall was selected as the earth retaining wall supported by temporary ground anchors (Kuan-seng, 2013). The advantages of the selected wall type are water-tightness to prevent groundwater drawdown at the retained side; The ability to vary the pile lengths to suit the irregular limestone bedrock profiles. (d) SMART Tunnel Lining Work After the surrounding soil is improved with the spray of the cement material, the tunnel lining is installed in place. Ring joints and parallel joints are used as the support when the tunnel lining work progresses (Refer to Figure 3). The tunnel lining are sealed with neoprene band which circulates into groove during the manufacturing and installation of the linings. The sealing of tunnel lining takes place by placing two segments and pressing the seal profiles together. The necessary force is applied to the ring joints by the tunnelling jacks of the shield and it is estimated that approximately 5600 tonnes of force is applied. (e) Ventilation System There are four ventilation shafts that split the tunnel into three major divisions. There are located approximately 1km intervals. The powerful ventilation suction fans will constantly renew the air and maintain the air quality within the motorway. The lowest channel where the stormwater are diverted during normal storm does not equipped with any electrical devices. In case of the major storm 5 where the three decks of the tunnel are closed the mechanical ventilation will automatically shut down in order to make way for the flooding of the tunnel. (f) Flood Warning System MRT apply flood warning system which is very important as this is the only early warning system that can detect the rise of the river level during heavy thunderstorm. The system was designed by the Department of Sanitation and Irrigation of Malaysia, to minor all the rivers throughout the country. The main focus in this section was given to the design for rivers surrounding Klang Valley. The information system plays the major role the get the information from all the station situated along the river side, Process the information and channel the information to the authority further immediate response. Telecommunication system such as the “short messaging service” are now used as to spread out the flood warning as this services are very handy in the 21st century. 4.0 Challenges of Technology of Implementation in Tunnel Construction Tunneling and underground space solutions in Malaysia have undergone a very successful development in the last two decades, starting with the elaborate design of the well-known SMART project in Kuala Lumpur 15 years ago. Recently the innovative Variable Density tunnel boring machine for the MRT Klang Valley project won international awards and respect from tunnelling professionals all over the world. Malaysia has come of age, as it seems, in technical innovation for tunnelling solutions, and consequentially the Tunnelling & Underground Space Technical Division of the Institution of Engineers Malaysia (IEM) now has submitted its bid for Kuala Lumpur to host the ITA-AITES World Tunnel Congress (WTC) 2020. In Malaysia, tunnelling took on an important change in 2003 when there was an acute need to address major flooding issues in the city of Kuala Lumpur. With the city densely built up to the brims, the flood mitigation infrastructrure had to be taken underground via 6 tunnelling, and the geology in which the tunnel snakes through the city is made up of extreme karst. Building on the experience gained and technological improvements in the industry, the SMART (Stormwater Management and Road Tunnel) broke new ground not only in the country but worldwide by combining the functions of stormwater drainage and motorway tunnel. With 9.7 km length the SMART is one of the longest stormwater tunnels in South East Asia. The large 13.2 m diameter tunnel was constructed using a slurry shield TBM. Its construction posed a number of challenges, primarily related to the karstic limestone formation through which the tunnel had to be driven. These challenges were met and overcome by good engineering in design and construction. 4.1 Why Tunneling Tunnels have been a hallmark of human civilisation since prehistory and though their primary function is to create a direct route through an otherwise impassable medium, their actual use has been extremely varied. From the labyrinthine network of the London Metro and the New York subway system to the Cu Chi tunnels in Vietnam, tunnels are ubiquitous in modern society. Tunnels are as much a part of the landscape here in Malaysia as well, with examples ranging from passages that cut through the mountainous interior of the peninsular to the underground LRT network beneath Kuala Lumpur city. The SBK Line and SSP Line underground alignments will have strategic stops at the busiest commercial, residential and key employment areas in the heart of metropolitan Kuala Lumpur. With part of the Klang Valley Mass Rapid Transit (KVMRT) alignments designed to traverse through heavily built and populated residential districts, business centres, commercial centres and key employment areas in the urban and suburban corridors of Klang Valley, MMC Gamuda KVMRT (T) Sdn Bhd, faced with land constraints, had little alternative but to take the alignments underground. Due to crucial reasons such as constructability, cost and operational efficiency, the only solution was to go underground to avoid impediments to the social and economic vibrancy of Kuala Lumpur city. 7 4.2 Why Go Underground With part of the Klang Valley Mass Rapid Transit (KVMRT) Sungai Buloh-Kajang Line (SBK Line) and the Sungai Buloh-Serdang-Putrajaya Line (SSP Line) designed to traverse through heavily built and populated residential districts, business centres, commercial centres and key employment areas in the urban and suburban corridors of Klang Valley, some 9.5 km, for SBK Line, and 13.5 km for SSP Line, of the alignments were taken underground. The tunnelling is primarily through three key geological formations, Kenny Hill, KL Limestone and Granite, with most of the tunnel alignment sitting in the Grade V karstic limestone, MMC Gamuda had proposed for this section a twin mode tunnel boring machine (TBM) that would operate in both ‘slurry’ and ‘EPB’ modes, plus additionally equipped with facility to use a higher density slurry. The VD TBM has been attracting attention from industry specialists for its precise performance in tackling karstic limestone. This machine is a direct evolution from MMC Gamuda’s tunnelling experience on the dual purpose SMART tunnel project in Kuala Lumpur through similar karstic limestone, but obviously without the variable density provision and as a result with less control on ground loss. 4.3 Malaysia’s Tunneling Technology Challenges of MRT Construction of the MRT in the Klang Valley is throwing up unusual obstacles that require cutting-edge and customized methods and machinery, some that have not been used anywhere else in the world. In Malaysia, tunneling took on an important change in 2003 when there was an acute need to address major flooding issues in the city of Kuala Lumpur. With the city densely built up to the brims, the flood mitigation infrastructures had to be taken underground via tunneling, and the geology in which the tunnel snakes through the city is made up of extreme karst. 8 The MRT system best serves its function by providing connectivity to the busiest population pockets, but these pockets are also extensively developed with narrow corridors and dense structures. An aboveground route especially in the heart of KL city for the MRT is simply unfeasible. The most challenging task in the underground tunnelling works for the Klang Valley Mass Rapid Transit (KVMRT) for SBK Line is the tough geological formations found underneath Kuala Lumpur city. The underground alignment for the KVMRT SBK Line navigated past two distinctly different geological settings, with the extreme karstic limestone accounting for almost 50% of the underground alignment. Extreme karst is a geological formation consisting of weakly soluble bedrock such as limestone eroded by 9 mildly acidic water over millions of years, leaving behind an elaborate labyrinth of unstable caverns, cliffs and pinnacles in the depth of Kuala Lumpur city. For the the Sungai Buloh-Serdang-Putrajaya Line, similar challenges are expected. Thus, maintaining the equilibrium of the sub-surface geological system containing underground reservoirs and water-filled cavities is a challenge as any disturbances from underground activities could cause karst sinkholes and ground subsidence. Another possible consequence is bentonite blowouts, resulting in mudflows that rise to the surface during the boring process. The MRT Sungai Buloh-Serdang-Putrajaya Line’s underground section passes through three distinct geological formations. This determines the type of tunnel boring machines to be used for boring works. 4.4 Karstic Limestone The main challenge tunnelling in limestone is the difficulty in controlling the sudden loss of face pressure due to the existence of unpredictable underground voids and channels, resulting in surface settlement or sinkholes. This is normally overcome by extensive mapping and investigation before tunnel boring starts. The Variable Density Tunnel Boring Machine (VD TBM) slows down the sudden loss of face pressure by applying more viscous slurry to prevent blowouts to surface through underground channels 10 4.5 Kenny Hills This geological formation consists of mainly sandy silt and sandstones and is generally stable for tunnelling. The challenge is from the abrasiveness of the material, resulting in excessive wear and tear to the TBM’s cutting tools. There are also sporadic intrusions of quartz lens or dyke that is very hard. The Earth Pressure Balance machine is well-suited for this geological formation. 4.6 Granite Granite is generally hard and abrasive. The main challenge is the need for regular maintenance and change of tools, resulting in tunnelling at this section being slower. Weathering of the granite underground may result in water channels being trapped and hidden, making the conditions similar to karstic limestone. The use of the VD TBM manages the mixed condition and prevents the drawdown from the water lenses. 11 5.0 Case Studies 5.1 Comparison of Taipei MRT and Kaohsiung MRT Kaohsiung MRT has only one single line, and plus there are comparatively few shuttle buses offering passengers to interchange with their destinations. Moreover, there are relatively few routes for shuttle buses to travel, which results in inconvenience. Accordingly, Kaohsiung MRT has yet to publish the interchanging information on the brochures for passengers; instead, it posted the interchanging information inside the station only. On Taipei MRT, except for Taipei Main Station and Zhongxiao Fuxing Station, there is no other platform door constructed at HCS (High Capacity System). And in Taipei’s MCS (Medium Capacity System), except for Muzha and Taipei Zoo Station, the platform doors have been installed in every station. However, no matter whether it is the Red Line (●) or the Orange Line (●) on Kaohsiung MRT, platform doors have been installed in every station. With the precedent of Taipei, the authorities concerned installed platform doors at every station of Kohsiung MRT. Despite the broader platform doors on Taipei MRT, the public prefer the doors on Kohsiung MRT than those of Taipei MRT. The reason is that the passengers consider safety facilities in Kaohsiung to be better. Fig.1 The platform on Taipei MRT Fig.2 The platform on Kohsiung MRT 12 5.2 Door Warning Lights in Taipei MRT Construction and Warning Sirens in Kaohsiung Construction Unlike Taipei MRT, which uses flashing warning light to indicate that platform doors are about to close, Kaohsiung MRT uses warning sirens to remind passengers of the coming trains. Passengers, however, consider warning light better than warning sirens due to the misunderstandings warning sirens may cause. The warning sirens make people confused about the coming directions of MRT since they cannot tell which siren is going off, and which is dangerous to passengers. 5.3 Safety Facilities There are same safety facilities both on Taipei and Kaohsiung MRT; however, it’s Kaohsiung MRT that has Nighttime Safeguarded Waiting Zone. 5.4 The Convenience of Handrails Overall, Kaohsiung MRT is said to be more user-friendly than Taipei MRT because on the train, it segmented the central handrail into three vertical branches, which gives passengers more handles bars to hold on and thus increasing safety on MRT. A construction project involves so many parties, such as owners, designers, construction contractors, subcontractors, maintenance contractors, and material suppliers, that some interface problems can arise, for example, the lack of cooperation, limited trust, and ineffective communication leading to an adversarial relationship among all these project stakeholders. This kind of relationship induces project delays, difficulty in resolving claims, cost overruns, litigations, and compromise project quality. On facing such types of situations, practitioners can only manage to re-solve them according to their own intuition instead of standards and thus the individual cannot be provided with a comprehensive picture of the interface problems. Consequently, these interface problems need to be immediately and carefully resolved, particularly through proper coordination, cooperation, and communication among the construction parties. Many studies listed in the literature discuss the interface problems between two parties, including designers and 13 contractors and subcontractors’ owners and maintenance contractors’ owners and designers as well as common interface problems among various construction parties. However, all the main interface problems are identified only through a review of the literature and a pilot study of the interviews rather than by using any statistical tools. Moreover, the adverse effects of these interface problems among the related parties upon the completion and quality of the construction projects is not highlighted. Therefore, it is essential to rigorously categorize the interface problems among various parties and accurately study their effects on the projects in order to avoid excessive costs as well as improve the quality of the construction projects. In order to successfully combine practice and theory, this paper aims to identify the main interface problems among various construction parties and assess their impacts with particular reference to the mass rapid transit system (MRTS). as far as the construction of the MRTS is concerned, the additional expenses incurred by the interface problems are higher than any other construction project owing to its highly complicated integration between the mechanical, electrical, civil, and track interfaces. As a result, the problems in the MRTS require greater consideration than any other type of construction. 5.5 Definition of Interface interface is a dimension between two firms or organizations that can mutually influence each other, whereas Lin believe that interfaces exist within the occasions, processes, systems, elements, and equipment’s. In any case, the concept of “the conflicts among units need to be coordinated and resolved” is generally accepted. The units are likely to be contractors, materials, or events, and their interactive relationships are further prominent causes of interface problems. Therefore, the possibility of interface problems emerging would inevitably rise with the gradual development of construction projects together with an increasing complexity in the interactive relationships among the involved parties. With regard to the MRTS projects, interfaces would probably appear in electrical, civil, functional, physical, organizational, or contractual shapes. Hence, based on these previous researches, the definition of “the matters required to be physically and functionally 14 coordinated or cooperated with among two or more subjects” is thought to be appropriate for this research. 5.6 The Analysis of Construction Interface Management According to our definition of interface, a range of interfaces would come into existence between or among various parties in all types of construction projects. Hence, the importance of interface management is discussed as well as emphasized in literature. For instance, Stuckenbruck suggested that one project involving numerous people, parties, and units must be carefully and effectively integrated into a single unit if it aims to operate smoothly so as to prevent incurring extra costs. Moreover, proposed that a project could prosper only through the proper management of communication, coordination, and responsibility across a common boundary between two organizations, phases, and independent physical entities. The critical relationship between interface management and project success is developed so constantly in literature further proposed that the performance of interface management completely depended on how smooth the interface could be made. Therefore, it is evident that effective interface management and wellorganized solution to interface problems would be essential for ensuring project success. Its proposed that five different perspectives in order to analyze interface management, namely, “contract interface”, “technology interface”, “monitor interface”, “execution integration interface”, and “the interacting behavior in the interface”. Among all these views, the “execution integration interface” is the most practical and comprehensive to understand interface management involved in construction projects. Generally speaking, a construction project involves a variety of parties having contracts with each other, such as designers, PCM, constructors, suppliers, and executives in a project; however, only the major contractor possesses the authority to integrate and monitor the execution process. As a result, successful interface management in a construction project should carefully integrate all the technical and managerial matters among the involved parties and emphasize their coordination and cooperation. Otherwise, counteractions will emerge in the interface and cause damages to all the participants in the project. 15 6.0 Discussion of case study among construction parties With the rapid development of technology and the increasingly bigger size of constructions, the involved parties are required to pay more attention to all types of difficult interface problems than ever before. By considering the mass rapid transit system (MRTS) as an example, several problems resulting from complicated mechanical, electrical, civil, and track interfaces led to enormously extra losses in the construction process. Types of interface problems will probably cause a huge disaster in construction projects such as the following variables: Difficulty in coordination between interfaces Track engineering constructors, do not embark on detailed design until they award the contract, which is different from other types of constructions. Thus, they try to use as much of their stock material as possible while undertaking the design. However, old-fashioned stock material does not meet the owner’s requirement; therefore, it will result in poor interface coordination and bring about new interface problems. Parties different opinions on mutual views and needs, there are too many parties involved in a track engineering construction project to have a good understanding of mutual standpoints and needs among all the parties. If some party strongly insists on their own view, there will be competition and arguments within the interface and thus the entire project will get deferred. Limited personal experience and defective feedback, since the technological characteristics of track engineering changes with time, personal past experience about interface problems cannot be utilized in new projects. Therefore, previous solutions for interface problems might not be applicable for the present situation, which could bring about the occurrence of new interface problems. Increase in the uncertainty and ambiguity of interface conflicts, With the emergence of new types of construction projects, unprecedented interface problems occur and thus create a great deal of uncertainty and ambiguity, which may raise the possibility of interface arguments and conflicts among the participating parties. 16 Incompetence in solving new technical problems, newly developed techniques have surpassed traditional imagination and thus the relevant staffs are incompetent in dealing with arguments arising from the development of new techniques. It is imperative to acquire more understanding of the new technical (know-how) problems in addition to personal past experiences. Otherwise, new types of interface problems will probably cause a huge disaster in construction projects. Table 1: Summary of factor analysis (Management factor). Small number of factors that can be used to represent the relationships among sets of many interrelated variables. It was conducted to reduce the interface problems into a small number of underlying factors. The extraction and rotation of the factors were performed to yield a small number of factors and obtain a clearer picture of what each factor represents. 6.1 Suggestions for the critical interface problems For the purpose of reducing the harm that they could cause and improving future performance, two solutions— project partnering and configuration management—have been proposed as follows. 17 1. Project Partnering is such a magnificent technique that it can create an effective project management process between two or more organizations along with avoiding the repetitive occurrence of problems and possible litigation in the construction project. It intends to generate an organizational environment of trust, open communication circumstances, and employees’ involvement. 2. Configuration Management its purpose is really quite simple and elegant. It is designed to ensure that organizations possess the information they need to guarantee that the expected performance is met. Moreover, configuration management can provide a method and program for the management of change orders. In the long term, it can prevent unnecessary changes from taking place as well. The idea of configuration management is helpful for the settlement of confrontations when inconsistencies occur between subsequent performances and the original plan and design. Therefore, numerous interface problems caused by poor coordination can be effectively reduced because it can setup a standard for the parties to abide by. Suggestions from this case study there is no significant influence of environmental factors on the construction performance. Nevertheless, in practice, construction performances are apparently restrained by local regulations and global market integration. As a result, an investigation of the relationship between environmental factors alone and the construction performance should be conducted in the future. Cases on various track engineering construction projects, such as Kaohsiung MRTS or Taiwan High-Speed Rail Project, should be launched to verify the applicability and reliability of the consequences indicated in this research. The industry with the best practice can be denoted as the benchmark for similar construction projects in the future and effective strategies can also be suggested to enhance the project performance and improve the dispute resolution mechanisms. Longterm observations with the establishment of database in the future are beneficial for a comprehensive understanding of a range of interface problems, which are not completely revealed in this study. By means of a full-scale survey, the possible problems can be understood and controlled on a pre-contract basis and thus the standard of track engineering construction can be effectively enhanced. 18 Lastly, categorize common interface problems as mentioned above in the MRTS and discussed the relationship between them and the project performance. It provides an overview of foreign studies in terms of significant interface problems in track engineering projects. 6.2 MRT - More Convenience or Waste In this project need to discuss the differences between Taipei and Kaohsiung MRT systems, such as the investigation toward people’s willingness to take the MRT, efficiency, cleaners, and facilities. We can not only know how to improve the drawbacks on the Kaohsiung MRT, but make people have a further understanding of MRT systems. In the future, Taichung metropolitan areas in Taichung are going to set up the MRT system. From differences of facilities on Taipei MRT and Kaohsiung MRT can discuss the case study of them as Kaohsiung MRT has only one single line, and plus there are comparatively few shuttle buses offering passengers to interchange with their destinations. Moreover, there are relatively few routes for shuttle buses to travel, which results in inconvenience. Platform Doors, On Taipei MRT, except for Taipei Main Station and Zhongxiao Fuxing Station, there is no other platform door constructed at HCS (High Capacity System). And in Taipei’s MCS (Medium Capacity System), except for Muzha and Taipei Zoo Station, the platform doors have been installed in every station. Unlike Taipei MRT, which uses flashing warning light to indicate that platform doors are about to close, Kaohsiung MRT uses warning sirens to remind passengers of the coming trains. Passengers, however, consider warning light better than warning sirens due to the misunderstandings warning sirens may cause. Table2. The comparison of Taipei and Kaohsiung MRT 19 In conclusion, the authorities concerned of Taipei MRT systems should be 10 concerned about the efficiency, safe facilities, and better environment. And the authorities concerned of Kaohsiung MRT system should make more efforts on improving its efficiency, convenience, and the designs of routes. 7.0 Conclusions This research initiated a comprehensive investigation through face-to-face interviews and questionnaires to categorize common interface problems in the MRTS and discussed the relationship between them and the project performance. It provides an overview of foreign studies in terms of significant interface problems in track engineering projects. The research findings were confirmed to be applicable and influential to the majority of future track engineering projects. On one side, two interface problems (experience and coordination factors) were identified to be critical with regard to project performance. They both occurred due to the lack of know-how. On the other hand, in spite of the insignificance of the remaining four factors, they make the overview of interface problems more complete. Therefore, in practice, the first step to solve interface problems is to train employees, increase their coherence, and create an atmosphere of cooperation. Past experience dominates the rate of project progress and thus experience and instruction should be emphasized among the involved parties. With regard to practical application, it is crucial to avoid the repetition of the same mistakes and thus some taskforces comprising experienced personnel should be formed, whereas inexperienced employees should get 20 involved in the construction project. For example, configuration management, maintaining the requisite designs, and earlier solutions to interface problems can efficiently lower wastage with regard to cost and time. Coordination is so critical to the quality of the project that a system that is capable of facilitating the participants’ knowledge of their mutual needs should be established to avoid internal competition for resources. Integration will be the core ingredient of management in the future as well as the essential part of tomorrow’s organization; therefore, to increase competitiveness, it becomes vital to establish the integral platforms for proper coordination among the participants. Environmental factors seem insignificant to the project performance because they are external forces that are not brought about by humans. As a result, the importance of the environment should be less than that of humans in the entire construction project. As a conclusion, the KVMRT project has many benefits to the people once it is completed but they will have to bear with the problems that may appear during the completion of the project. MRT project should be able take Malaysia closer to its target; to be one of the world’s advanced countries by 2020. Therefore, the KVMRT, without doubt, brings good benefits to the people. 21 8.0 Reference Sekou, E. A. (2012). Promoting the use of ICT in the construction industry (Doctoral dissertation, Department Of Building Technology, Kwame Nkrumah University of Science And Technology-Kumasi Levinson, H., S. Zimmerman, J. Clinger, S. Rutherford, R.L. Smith, J. Cracknell, and R. Soberman. Bus Rapid Transit, Volume 2: Implementation guidelines. Transit Cooperative Research Program Report 90, Transportation Research Board (2003). Nurdden, A., Rahmat, R. A., and Ismail, A. Effect of transportation policies on modal. shift from private car to public transport in Malaysia. Journal of the Applied Sciences, 7(7) (2007), p. 1013-1018 Kuan-seng, K. (2013). Design and Construction of Excavation Works for Klang Valley Mass Rapid Transit Underground Station. Fifth International Young Geotechnical Engineering Conference - 5iYGEC’13, 5–8. Razak, M. H. B. A., & Ismail, A. (2015). Minimizing defects occurrences on sfrc tunnel segment of Klang Valley MRT project. Journal of Engineering Science and Technology, 10(Spec. Issue on 4th International Technical Conference (ITC) 2014), 13–23. Tunnel. (2017). Tunnelling in Malaysia. Retrieved December 9, 2018, from http://www.tunnelonline.info/en/artikel/tunnel_Tunnelling_in_Malaysia_2822504.h tml Tunnelling in Malaysia International/TBM . 2017. ternational Freelancing Journalist and Author,Wetzlarhttp://www.tunnelonline.info/en/artikel/tunnel_Tunnelling_in_ Malaysia_2822504.html Breakthrough of the world’s first Variable Density Tunnel Boring Machine.2016. https://www.mymrt.com.my/events/breakthrough-of-the-worlds-first-variabledensity-tunnel-boring-machine/ 22 9.0 Appendix 9.1 Appendix A: Photos of M RT MRT LINE KAJANG 23 MRT train Malaysia SMART Tunnel Lining Work 24 SMART Tunnel’s Ventilation System Flood Warning System 25 9.2 Appendix B: Drawing of M RT MRT station MRT LINE KAJANG