International Journal of Civil Engineering and Technology (IJCIET)
Volume 10, Issue 04, April 2019, pp. 219-227, Article ID: IJCIET_10_04_024
Available online at http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=10&IType=04
ISSN Print: 0976-6308 and ISSN Online: 0976-6316
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ANALYSIS OF PHYSICAL MODEL RUBBER
WEIR CONTAIN WATER AS MOTION WEIR
FOR FLOOD AND ROB HANDLING
Fatchur Roehman*
Civil Engineering Department, Universitas Sultan Fatah, Jalan Raya Katonsari No 19 Demak,
Central Java 59516, Indonesia
Slamet Imam Wahyudi and M. Faiqun Niam
Civil Engineering Department, Universitas Islam Sultan Agung, Jalan Raya Kaligawe,
Semarang KM. 4, Po Box 1054/SM, Central Java 50112, Indonesia
Corresponding author *
ABSTRACT
The aim of this study is to evaluate the existing conditions of flood and rob disasters,
prepare closed circuit water canals for experiments, analyze the characteristics of
water-filled rubber weirs so that weir models can be used as appropriate technology,
and carry out stability analysis on currents. The research method used several
variations of model simulations to find a correlation between upstream water level
elevation and a simulated elevated water level elevation. The variables studied are weir
loads, mud, earthquake and hydrostatic stresses. The laboratory test results obtained
that the elevation is obtained in the safety factor of 1.603 and the downstream elevation
is found to be a safety factor of 1.597 in the condition of the flood face.
Key words: Model; Weir Contain Water; Flood; Rob; Safety Factor.
Cite this Article: Fatchur Roehman, Slamet Imam Wahyudi and M. Faiqun Niam,
Analysis of Physical Model Rubber Weir Contain Water as Motion Weir for Flood
and Rob Handling. International Journal of Civil Engineering and Technology,
10(04), 2019, pp. 219-227
http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=10&IType=04
1. INTRODUCTION
Flood control and rob rubber dams filled with water are immediately resolved. The material
used is an appropriate technology so that the public is easy to get and operations [3]. In order
for the community to participate in helping guard the dams that have been made so that the
surrounding settlements and roads are not flooded [17; 19].
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Fatchur Roehman, Slamet Imam Wahyudi and M. Faiqun Niam
The aim of the study was to evaluate the conditions of flood and rob disasters, tomake
closed circuit water canals for experiments, to analyze the characteristics of water-filled rubber
weirs by making four weir shape patterns, discharge stability analysis in weir models in the
laboratory.
2. LITERATURE REVIEW
Rubber weir is a relatively new type of hydraulic structure compared to sluice gates, weirs are
made of high-strength fabric attached to rubber that forms a rubber bag, will be filled with
water, so that it can expand or deflate as needed [10].
Maintenance of rubber weirs, especially the rubber parts, must be carried out with high
intensity, given the trivial disruption to rubber can result in the dam not functioning at all.
Equipment for the operation of rubber weirs include the number of blowers 1 set with the
capacity specifications of the pump (Blower) no less 14 m³ / minute, maximum pressure 4000
mmaq, pump drive in the form of diesel fuel motor, control panel / operation 1set, installation
of filler / waster 1 set , valves for operation and safety 1 set [18; 15].
Rubber dams have many advantages, such as simple hydraulic structures, short construction
times, perfect seismic performance, and low resistance to water flow in the flood season. The
first case study of a rubber dam is on the Janjawati River [16]. Rubber dams have been used in
China for the past 40 years because water conservation structures are cheaper compared to
conventional fenced structures such as dams, especially in small and medium rivers [20].
Figure 1. Weir operations
(Dnyaneshwari Kolte et al, 2017).
Rubber weir filled with water, the developer media used is water. It has special advantages
over rubber dams filled with air so that the deflating process is easy.
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Analysis of Physical Model Rubber Weir Contain Water as Motion Weir for Flood and Rob
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Figure 2. Weir pattern
(Dnyaneshwari Kolte et al, 2017).
Figure 3. The water pressure system in the weir
(Abdullah Ali Nasser Alhamati et al,2005)
Infrared dam is a flexible and easily foldable cylindrical inflatable rubber structure made
of rubber material attached to a rigid base and inflated by air, water, or a combination of air /
water.
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Fatchur Roehman, Slamet Imam Wahyudi and M. Faiqun Niam
Figure 4. Membrane work system
(Abdullah Ali Nasser Alhamati et al, 2005)
The behavior of air or water thrust increases physically and theoretically to be analyzed by
different conditions of internal, upstream and downstream pressure depths.
Figure 5. Weir model on the flum
(Abdullah Ali Nasser Alhamati et al , 2005)
Experimental data obtained at laboratory test facilities for dams that are increased by air
and water increases and are compared with theoretical results estimated from computer
programs developed by describing height, cross-sectional profiles and cross-sectional areas of
the dam [1].
2.1. Characteristics of Weir Bodies
The rubber material used has a specification of abrasion test hardness using the H18 method
with a load of 1 kg at 1000 times rotation not exceeding 0.8 m3 / mile. Tensile strength at
normal temperature ≥ 150 kg / cm2 and tensile strength at a temperature of 1000 ≥ 120 kg /
cm2 [11]. Rubber material is reinforced with a nylon thread arrangement that provides tensile
strength in accordance what is needed to resist the force. Rubber base material is commonly
used synthetic rubber such as ethylene propylene diene monomer (EPDM), chloroprene rubber
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(CR) [12]. The thickness of the cover is taken about 3 mm on the surface 7 mm. Clamping
system placement of a rubber tube on the foundation using steel anchored. For low weirs with
H ≤ 1.00 m can be used a single armature, whereas for H> 1.00 m, usually used double
armature. Weir influenced the tide always use double armature [8].
2.2. Experimental Scale Analysis
A good rubber weir has criteria including being able to deflate automatically and manually
under the planned conditions. So that the required data is the planned debit Q100 of 305.09 m3
/ sec with weir type of water filling, volume / quantity of 1 set and base width 30 m and height
weir 3 m [13; 14]. The dam elevation is +1.50 and the base elevation is -1.50 while the water
level is downstream -1.20 and the slope of the foundation wall is 1: 1. For a maximum bubbling
time no more than 45 minutes as well as emptying no more than 45 minutes. Manually
controlling the clamping system with a double clamp and max pitch of 200 mm armature. While
ethylene propynele mnome (EPM) or cloprene rubber weir material as well as the carpet used
is the same as rubber weir material. Armature bolts and nuts use stainless steel (SUS 304) and
base plate using SS 400 galvaniced carbon steel and rubber clamp plate using FCD 500
galvanized cast iron. For a 1 year guarantee and the number of 1set pumps with a capacity of
0.20 m3 / sec and the height of the pump head adjusted to the fill pipe installation. Pump drive
is an electric motor and water fill pipe installation and valves for operation and security 1set
generator power supply135 kva as a pump drive [2].
2.3. Hydraulic characteristics
Rubber weir functions to raise the water level by inflating the body and lowering the water
level by deflating it[5; 6]. The hydraulic design of the weir is flood water level + 2.40,
embankment elevation +3.40, weir height 3.00 m, weir -1.50 base elevation, and weir 30 m
width. Drain door is 1 piece, width is 2.0 m, runoff capacity is 350.41 m3 / sec, upstream apron
length is 20 m, 0.50 m thick and downstream apron length is 8 m. The door thickness is 0.50
m and the floor length of the dam is 20 m and is 2.0 m thick while the pool length is 10 m and
thick 1.0 [4; 7].
3. METHODS
The method used is to make a form of water-filled rubber weir and a closed water circuit
framework, circuit canal assembly, simulation of elevation and rolling style of water-filled
rubber weir in the laboratory, data processing, data analysis, preparation of results and
discussion, conclusion. For more details can be seen in Figure 6 Research Flow Chart below.
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Fatchur Roehman, Slamet Imam Wahyudi and M. Faiqun Niam
Figure 6. Research Flow Chart
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4. RESULT AND DISCUSSION
Simulation of water-filled rubber weir using a circuit canal prototype made of elbow steel frame
and the cover of glass 4 mm Length 6 m, Width 0.6 m and height 0.4 m, consisting of two
regulator doors, two pumps for let and out let, filler tank and function also as a return water
reservoir, thomson tool, 2% slope used in the laboratory.
Table 1. Bending simulation results
B
N
o
Weir
shape
1
ϒ water
H
Shape
Factor
(m
)
(Ton/m3
)
(m)
Triangel
0,4
0,1
0,5
1
2
rectangula
r
0,4
0,1
0,5
1
3
Cylinder
0,4
0,1
0,5
1
4
Trapezoid
0,4
0,1
0,5
1
Weight(to
n)
arm (m)
Momen
hold it
down
(Horizon
tal)
Information
SF=V/K
x
y
x
y
Bolster
(Vertik
al)
0,0
06
0,0
12
0,0
12
0,0
06
0,01
2
0,01
2
0,01
2
0,01
2
0,3
5
0,3
5
0,3
5
0,3
5
0,1
5
0,0021
0,0018
Bolster
1,166667
0,2
0,0042
0,0024
Stable
1,75
0,3
0,0042
0,0036
Bolster
1,166667
0,6
0,0021
0,0072
Bolster
0,291667
Gambar 7. Grafik simulasi empat bentuk bendung di laboratorium
Figure 7. Circuit canals and weirs in the laboratory
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Fatchur Roehman, Slamet Imam Wahyudi and M. Faiqun Niam
5. CONCLUSIONS
Experiments in the laboratory can be concluded that the selection of material types and shapes
used for rubber dams filled with water should be flexible and have high tensile strength so that
it is not easily torn and strong against the pressure of flow stability. The type of water-filled
rubber weir is not yet in the free market in Indonesia. Planning water-filled rubber weirs utilizes
geomembrane material as a form of appropriate technology so that people can cope with sea
tide that enters the mouth of small rivers around the shoreline by spreading water-filled rubber
dams, so as to prevent flooding in residential areas near the coast.
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