16-Nov-16
BENGKEL PENENTUAN KAEDAH PEMBAIKAN CERUN UNTUK PIHAK
BERKUASA TEMPATAN :
COST ESTIMATION FOR SLOPE
REMEDIAL WORKS
DATE
VENUE
TIME
PRESENTER
:
:
:
:
23 NOVEMBER 2016
PUSAT TEKNOLOGI, KOTA SAMARAHAN, SARAWAK
2.30PM – 4.30PM
MR. HAZMAN B. AHMAD (OPERATION MANAGER)
1. INTRODUCTION
OUTLINE
2. SCOPE OF WORK FOR SLOPE
REMEDIAL WORK
3. PARAMETERS OF COST
ESTIMATION
4. EXTERNAL FACTOR OF COST
ESTIMATION
5. EXAMPLE OF COST ESTIMATION
6. CONCLUSION
1
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1.0 INTRODUCTION
1.
2.
3.
4.
5.
6.
Generally, slope remedial work need to be
carried out on existing failed slope.
Normally, the application of remedial work is
subjected to the suitability of site condition,
such as the location of site, site difficulty, type of
failure, soil profile, etc.
Thus, the cost of slope remedial at particular
location might be differ with another location.
Cost estimation of the remedial work is
necessary to ensure the cost applied for the
remedial is within range of market value.
Cost estimation is an approximation of the
probable cost of a project on the basis of
available information.
Cost overrun can be avoided with a credible,
reliable and accurate of cost estimates.
SCOPE OF REMEDIAL WORKS
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PRELIMINARY WORK
Example
UTILITIES – Mapping/
Relocation/Supply
SITE FACILITIES - Site Office
Requirement & Provision , etc
TESTING - Prelim Test
EARTHWORK (EXCAVATION &
BACKFILLING)
Example
Photo example of
excavation &
backfilling work
SLOPE STABILIZATION WORK
Example of Rubble Wall & Rubble Pitching
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SLOPE STABILIZATION WORK
Example of Soil Nailing
SLOPE STABILIZATION WORK
Example of Gabion Wall
SLOPE STABILIZATION WORK
Example of Crib Wall
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SURFACE PROTECTION WORK
Shotcrete
SURFACE PROTECTION WORK
Reinforced Enkamat
SURFACE PROTECTION WORK
Vegetation
5
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DRAINAGE SYSTEM WORK
(Surface Drainage)
DRAINAGE SYSTEM WORK
(Subsurface Drainage)
Horizontal Drain
ROAD WORK
Crucher Run
Roller Compaction
Premix
Pneumatic Compaction
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EXAMPLE BILL OF QUANTITY
(Preliminary Work)
CADANGAN KAJIAN GEOTEKNIKAL DAN KERJA REKABENTUK TERPERINCI BAGI RUNTUHAN
CADANGAN
CERUNKAJIAN
DI DEWAN
GEOTEKNIKAL
FLAT
DAN KERJA REKABENTUK TERPERINCI BAGI RUNTUHAN
CERUN
DI DEWAN
FLAT
CADANGAN
KAJIAN
GEOTEKNIKAL
DAN KERJA REKABENTUK TERPERINCI BAGI RUNTUHAN CERUN DI DEWAN FLAT
TAMAN MULIA, BANDAR TUN RAZAK, WILAYAH PERSEKUTUAN
TAMAN MULIA, BANDAR TUN RAZAK, WILAYAH PERSEKUTUAN
TAMAN MULIA, BANDAR TUN RAZAK, WILAYAH PERSEKUTUAN
Bill No. 1: General Items and Preliminaries
Bill No. 1: General Items and Preliminaries
Item
Unit
Quantity
Item
All quantities are provisional
General
Items and Preliminaries
GENERAL
ITEMS AND
1
1.1
Contractual Requirements
1.8.4
Allow for the provision of Performance Bond in the form of
sum
sum
1.10.1
Inspection and Testing
sum
1.11
the contract period.
1.11.1
Preparation and submission of monthly progress report including
1.11.2
As-Built Drawing
1.11.3
Allow for the preparation of as-built drawings and completion
sum
Survey and Setting Out Works
Survey and Setting Out Works
Provide setting out, levelling and checking of construction of
sum
Temporary Works
Temporary Works
To provide temporary silt-sump/sediment traps,silt fence, earth drains,
sum
Supply, lay and maintain Grade A tarpaulin sheet for slope protection
sum
of the specification.
1.12
1.12.1
Work Programme
Provide and maintain temporary access road from/to working
sum
platform.
report duly certified by licensed surveyor as per requirements
Work Programme
Miscellaneous
Miscellaneous
Allow sum for temporary relocation and/or other related protection
sum
of utilities works due to construction as directed by the S.O.
Allow for submission of Programme of Works prior to
sum
commencement of works throughout the contract period.
1.13
1.13.1
Site Cleaning anf Clearing
Site Cleaning and Clearing
1.6.1
sum
of work and remove on completion of works.
during construction works as directed by the S.O.
As-Built Drawing
1.6
Provide and maintain one (1) project signboard for the duration
sum
throughout the contract period.
1.5
sum
Project Signboard
1.15.1
to maintain during construction stage.
traffic management report complete with colour photographs,
1.5.1
Provide and maintain safety equipments as per specified in
Project Signboard
1.15
sum
etc, to contain possible spillage of silt to adjacent site and
Progress Report
Progress Report
1.4
Amount
(RM)
all works under the contract by a licensed surveyor.
All quality control and testing requirements including preparation of
report, test records complete with colour photographs, throughout
1.4.1
Price/Unit
(RM)
of works.
1.10
Inspection and Testing
1.3.1
Quantity
Appendix 1A or requested by S.O.
Mobilization and
Demobilization
Mobilization and Demobilization
Allow for the mobilization of all labour, plant, equipment and
and incidentals necessary to satisfactorily perform the
injuries and damaged properties.
ii. Workmen's Compensation and/or SOCSO.
1.3
Unit
contract works and demobilization of the same on completion
i. Insurance of Works including insurance against personal
1.2
1.14.1.3
and welfare regulation orders or by laws relating to all work people
1.9
1.9.1
Allow for the provision of insurances as per condition
of contract.
Amount
(RM) Description
All quantities are provisional
sum
(personal protective equipments, etc.).
for performance and observance of this contract.
Price/Unit
(RM)
Quantity
Item
B/F
Provision of all costs incurred by complying with all safety, health
Perlaksanaan equal to five (5) percent of the Contract Sum
1.2.1
Unit
B/F
approved Bank/Insurance Guarantee/Wang Jaminan
1.1.2
Bill No. 1: General Items and Preliminaries
Amount
Description
(RM)
All quantities are provisional
PRELIMINARIES
Contractual Requirements
1.1.1
Price/Unit
(RM)
S.O’s Office Requirement
S.O.'s Office Requirement
Provide, service and remove upon completion of work S.O.'s
sum
site office (cabin) complete with air-cond. and necessary furnitures/
Allow for site cleaning and clearing of construction debris through
sum
equipments as specified by S.O.
out the construction and upon completion of works and dispose
Compliance With Statutory
Requirement
surplus from site to contractor's own tip.
1.7
1.13.2
Compliance With Statutory Requirements
1.7.1
Allow for Statutory Obligation including levy payment to the
Statutory Requirements and Lembaga Industri Pembinaan Malaysia
1.14
sum
1.14.1
1.8
Allow for the establishment of the contractor's site office and
sum
Site Office Provision
Site Office Provision
The contractor shall provide and maintain the following to the
approval and for the use of S.O and his staff within two (2)
Contractor’s Site Office and
Contractor's
Site Office and Accommodation
Accomodation
under Part VIII of the LPIPM Act 1994.
1.8.1
Allow maintenance for S.O.'s office as directed by S.O.
weeks from the commencement date of the works until the
insurance of Certificate of Practical Completion by the S.O.:
sum
1.14.1.1
workmen's accommodation.
Provide and maintain one (1) new computer facilities comprising
sum
of laptop computer system including all accessories as specified
in Appendix 1B of the specification or requested by S.O.
1.8.2
Allow for the maintenance of the contractor's site office
sum
throughout construction period.
1.14.1.2
Provide and maintain one (1) new digital camera with photografic
sum
record as specified in Appendix 1A of the specification or requested
1.8.3
Allow for the removal of the contractor's site office on
sum
by S.O.
completion of works.
CARRIED FORWARD
TOTAL CARRIED TO SUMMARY
CARRIED FORWARD
EXAMPLE BILL OF QUANTITY
(Earthwork, Slope Stabilization & Surface Protection)
CADANGAN KAJIAN GEOTEKNIKAL DAN KERJA REKABENTUK TERPERINCI BAGI RUNTUHAN CERUN DI DEWAN FLAT TAMAN
MULIA, BANDAR TUN RAZAK, WILAYAH PERSEKUTUAN
Bill No. 2: Slope Remedial and Mitigation Works
Item
Description
Unit
Quantity
ha.
0.5
nr
7
m3
6500
m
126
nr
14
nr
14
nr
50
nr
2
Price/Unit
(RM)
Amount
(RM)
All quantities are provisional
2
Slope Remedial and Mitigation Works
Site Clearing
2.1
Site Clearing
2.1.1
Clear and remove from site all obstacles over the areas for
Earthwork
the construction of slope remedial and mitigation works
including trees, shrubs, roots, fences, existing road, structures
and utilities, and disposal of all materials to Contractor's
own dump site as directed by S.O.
2.1.2
Pruning and cutting all trees and dispose off the site including grubbing
of the tree's roots exceeding 2m girth for slope protection works.
Excavation & Trimming
2.2
Excavation & Trimming
2.2.1
Excavate by mechanical equipment to obtain formation level, load
and transport unsuitable excavated material to contractor's own
dumping source.
2.3
Horizontal Subsoil Drain
Supply and install 75mm dia, 9m length horizontal subsoil drain
at 3m c/c spacing, consisting of perforated UPVC pipe wrapped
with a layer of non-woven geotextile as specified in drawing no.
2.3.1
2.3.2
Supply and construct cast in situ outlet drain made of Grade 25
concrete, inclusive reinforcement, as specified in Engineer's
drawing no.
2.5
2.5.1
Soil Nail
Supply and install T25, 6m length galvanized reinforcement steel
as soil nails complete with centralizers and grout injection (Grade
30 Concrete) through 100mm dia. Drill hole at 1.5m c/c spacing
Soil Nail
as specified in Engineer's drawing and specification, in any
strata (rock or soil). Works also include supply and fix nail head
Slope Stabilization
and all necessary works for proper completion inclusive
UPVC pipe as casing for soil nailing average length
as per drawing no.
2.5.2
Supply and install T25, 9m length galvanized reinforcement steel
as soil nails complete with centralizers and grout injection (Grade
30 Concrete) through 100mm dia. Drill hole at 1.5m c/c spacing
as specified in Engineer's drawing and specification, in any
strata (rock or soil). Works also include supply and fix nail head
and all necessary works for proper completion inclusive
UPVC pipe as casing for soil nailing average length
as per drawing no.
2.5.3
Allow for preliminary pull out test for soil nail as directed by the S.O
(Location to be determined on site)
2.5.4
Allow for pull out test for soil nail to 1.5 × Working Load as
nr
2
m2
5200
specified in Engineer's specification.
Surface Protection
Turfing
2.4
Turfing
Close turfing on level surfaces including 50mm bed of black earth
as specified in Engineer's drawing.
2.4.1
CARRIED FORWARD
EXAMPLE BILL OF QUANTITY
(Road Work & Drainage Work)
CADANGAN KAJIAN GEOTEKNIKAL DAN KERJA REKABENTUK TERPERINCI BAGI RUNTUHAN CERUN DI DEWAN FLAT TAMAN
MULIA, BANDAR TUN RAZAK, WILAYAH PERSEKUTUAN
Bill No. 2: Slope Remedial and Mitigation Works
Item
Description
CADANGAN KAJIAN GEOTEKNIKAL DAN KERJA REKABENTUK TERPERINCI BAGI RUNTUHAN CERUN DI DEWAN FLAT TAMAN
MULIA, BANDAR TUN RAZAK, WILAYAH PERSEKUTUAN
Bill No. 3: Drainage Work
Unit
Quantity
Price/Unit
(RM)
Amount
(RM)
Item
All quantities are provisional
4.8.1
Description
Unit
Quantity
m
95
m
104
Price/Unit
(RM)
Amount
(RM)
All quantities are provisional
B/F
4.8
3
Roadworks
Roadworks
3.1
Fill, spread, grade and compact 50mm thk. sand bedding as
m3
30
m3
62
3.1.1
specified in drawing and specification.
Drainage Works
Drainage Work
Surface Drainage System
Surface Drainage System
Supply and install cast in-situ Grade 25 concrete U-shape intercepter drain
(type D1) top width not exceeding 600mm and depth to invert
not exceeding 300mm. Rate inclusive excavation, formwork, lean
4.8.2
Fill, spread, grade and compact 300mm thk. crusher run material as
concrete, demolished existing drain, reinforcement and removal
road base (compact to 95% max. dry density) as specified in
of surplus material. Refer drawing no.
drawing and specification.
3.1.2
4.8.3
Supply and apply tack coat (Grade RC2) applied at a nominal spray
m2
205
m2
205
m2
205
Supply and install cast in-situ Grade 25 concrete V-shape berm drain
(type BD1), top width not exceeding 600mm and depth to invert not
rate of 1.20 ± 0.1 litres per square meter.
exceeding 300mm. Rate inclusive excavation, formwork, lean
concrete, demolished existing drain, reinforcement and removal
4.8.4
Supply, lay and compact 60mm thk. Asphaltic Concrete Binder
of surplus material. Refer drawing no.
Course (ACBC) as specified in drawing and specification.
m
300
3.1.4
Supply and construct 600mm (W) × 600mm (D) U-shaped channel
cascade drain Type CD1 made of Grade 25 concrete as specified in
Engineer's drawing. Rate include hacking-off, removal of existing
drains, excavation, lean concrete, reinforcement, formworks and
disposal of surplus material.
m
50
3.1.5
Supply and construct 750mm (W) × 750mm (L) × 750mm (D)
reinforced concrete sump (Type A) made of Grade 25 concrete as
specified in Engineer's drawing. Rate include hacking-off, removal
of existing sump, excavation, lean concrete, reinforcement,
formworks and disposal of surplus material.
nr
4
3.1.6
Supply and construct 1000mm (W) × 1000mm (L) × 1000mm (D)
reinforced concrete sump (Type B) made of Grade 25 concrete as
nr
5
3.1.3
4.8.5
Supply, lay and compact 40mm thk. Asphaltic Concrete Wearing
4.6
4.6.1
Supply all the materials and apply/re-apply reflective thermoplastic
marking (white), 200mm width single "Broken/Continuous Road
Line" as directed by S.O. or as specified in drawing.
Handrail
Handrail
Supply and install galvanised steel pipes handrail
complete with post as specified along capping beam including
cutting, welding and painting.
exceeding 1200mm. Rate inclusive excavation, formwork, lean
concrete, demolished existing drain, reinforcement and removal
of surplus material. Refer drawing no.
m2
m
Supply and construct U-shaped toe drain (type D2),
top width not exceeding 1500mm and depth to invert not
Course (ACWC) as specified in drawing and specification.
4.8.6
55
specified in Engineer's drawing. Rate include hacking-off, removal
of existing sump, excavation, lean concrete, reinforcement,
formworks and disposal of surplus material.
3.1.6
Upgrade existing drains, culverts, sumps and etc within residential area
sum
as specified in the drawing and specification.
Road Work
CARRIED TO GRAND SUMMARY
Drainage Work
CARRIED FORWARD
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3M 1P
1.
2.
3.
4.
Man Power
Materials
Machinery
Production
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EXTERNAL FACTOR
1. TYPE OF REMEDIAL.
2. QUANTITY OF WORK
3. LOCATION OF SITE.
4. DIFFICULTY OF SITE.
5. CURRENCY EXCHANGE.
6. MARKET VALUE OF
CONSTRUCTION MATERIALS AND
MACHINERY RENTAL
TYPE OF REMEDIAL
Type of remedial is one of the factor will
be affect the cost estimation because of:
1. Different work scope will be involve.
2. Different material will be used.
3. Different machinery will be used.
4. Different duration of work.
FACTOR OF LOCATION
(Rate of Machinery)
Different rate of
machinery depend
on site location
(state).
Source:
Jadual Kadar Harga Kerja-kerja Kecil Dan
Pembaikan 2014
9
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FACTOR OF LOCATION
(Rate of Man Power)
Different rate of
man power
depend on site
location (state).
Source:
Jadual Kadar Harga Kerja-kerja Kecil Dan
Pembaikan 2014
SITE DIFFICULTY
(Limited Access to Failure Area)
Less of production per
day will increase the
cost of operation work
FAILURE
Approximate
4.5m
House
Approximate
2.5m
SITE DIFFICULTY
(Limited Work Space)
Need the high
skill/experience man
FAILURE
power to
carry out
the work.
Working Area
House
Working Area
Working Area
House
House
Working Area
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PAPER CUTTING ON CURRENCY
EXCHANGE
PAPER CUTTING ON INCREAMENT OF MARKET
VALUE FOR CONSTRUCTION MATERIALS
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FLOWCHART OF COST ESTIMATION
Materials
Cost for overall quantity
Cost per day
Machinery
Total Cost
Rate per m²
Cost per day
Man-Power
Projection of
Work Duration
Quantity/Production
Production
Rate
Production per day
FLOW DIRECTION
CONCLUSION
1.
Cost estimation of slope remedial work
must be carried out to prevent the overrun
of cost.
2.
The estimator must experience on the
market value of man power, materials
and machinery.
3.
The efficient cost of slope remedial work
can be estimate by considering all the
factors and parameters that has been
presented.
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13