2. baseline programme narrative -lis-02
DESCRIPTION
asTRANSCRIPT
Table of Contents1. Project Data..................................................................................................................................................2
2. Project Scope and Site Description...........................................................................................................2
2.1. Location and General Composition..................................................................................................2
2.2. Scope of Works.....................................................................................................................................3
2.2.1. Roads & Site Clearance................................................................................................................3
2.2.2. Site access and traffic management..........................................................................................5
2.2.3. Road Markings and Signs............................................................................................................5
2.2.4. Pavements.....................................................................................................................................6
2.2.5. Utilities..........................................................................................................................................6
2.2.6. Street Lighting..............................................................................................................................8
2.2.7. Intelligent Transport System (ITS)...........................................................................................8
2.2.8. Surface water Drainage............................................................................................................10
2.2.9. Environmental............................................................................................................................10
2.2.10. Foul Sewerage.........................................................................................................................10
2.2.11. Treated Sewerage Effluent (TSE)........................................................................................10
2.2.12. Landscape................................................................................................................................11
2.2.13. Public Utility Services...........................................................................................................13
2.2.14. Inspection of Site....................................................................................................................13
2.2.15. Protection of Underground Services and Traffic Diversion...........................................13
2.2.16. Coordination with other Contractors...................................................................................13
3. Planning Methodology..............................................................................................................................13
4. Construction Approach:............................................................................................................................14
4.1. Package 1.............................................................................................................................................15
4.2. Package 2.............................................................................................................................................67
5. Assumptions for the Baseline programme:........................................................................................104
6. Baseline Programme Description:........................................................................................................104
6.1. General..............................................................................................................................................104
6.1.1. Construction milestone:.........................................................................................................104
6.1.2. Mobilisation..............................................................................................................................104
6.1.3. Permits/Approvals :................................................................................................................105
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6.1.4. Provisional Sum Instruction..................................................................................................105
6.2. Engineering.......................................................................................................................................105
6.2.1. General Submittals: ...............................................................................................................105
6.2.2. Material Submittal & Approval: ...........................................................................................105
6.2.3. Method Statement Submittal & Approval : ........................................................................105
6.2.4. Subcontractor Submittal & approval:...................................................................................105
6.3. Procurement:....................................................................................................................................105
6.4. Construction.....................................................................................................................................105
6.4.1. Part-1.........................................................................................................................................105
6.4.2. Part 2..........................................................................................................................................106
6.5. Project Close Out...............................................................................................................................107
6.6. Working hours:................................................................................................................................107
6.7. Programme Requirements:...........................................................................................................107
6.8. Critical Path :....................................................................................................................................107
7. Risk Assessment:.....................................................................................................................................146
1. Project Data
Contract:
DESIGN AND CONSTRUCTION OF LATERAL INTERCEPTOR SEWERS, AL WAKRA (LIS-02) - (C727/2)
Client: Public Work Authority
ENGINEER: CH2M HLL international B.V
Consultant:
Contractor: QBC Qatar Building Company
Project Start Date: 04th October 2015
Project Completion Date: 15th December 2018
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Contract Duration: 1,169 days
Contract Value: QR. 824,849,867.62
Maintenance Period: 365 days.
2. Project Scope and Site Description
2.1. Project Background
2.1.1 The City of Doha is experiencing significant growth, and the need for an efficient,
flexible and reliable wastewater management system is vital. The current pace of
growth is posing major challenges for the existing drainage infrastructure. The
Authority is the service provider for sewerage services in Doha, including the
sewerage collection network and associated treatment works.
2.1.2 To address the need for improvements, the Authority has embarked on a major
programme of expansion and upgrades that consists of numerous works currently
in various stages of development and completion. The Inner Doha Re-sewerage
Implementation Strategy (IDRIS) Programme is a world-class solution developed by
the Authority to upgrade and expand the sewerage infrastructure in order to
accommodate the projected population growth for an additional 1 million people in
Doha’s oldest area –the south catchment (around 680 km2).
2.1.3 IDRIS is strategic in nature and was developed to convert the foul-sewer drainage in
the Doha South Catchment from a pumped network to a gravity sewer network. The
IDRIS Programme both supports and contributes to achieving the Qatari National
Vision 2030 to transform Qatar into an advanced country capable of sustaining its
own development and providing a high standard of living for its people. The
Authority’s vision calls for the delivery of state-of-the-art, sustainable, world-class
buildings and infrastructure that can fulfil this vision.
2.1.4 The IDRIS scheme is comprised of a number of Lateral Interceptor Sewers (LIS) that
will be used to intercept flows in the existing high-level system and transfer them
into a new deep-trunk sewer; thereby, relieving the existing overloaded system. The
deep-trunk sewer, known as the Main Trunk Sewer (MTS), has an internal diameter
(ID) ranging between 3.0 and 4.5 meters (m) and will transfer the flows by gravity
for a distance of over 40 kilometres (km) south to a Terminal Pump Station (TPS)
located at the downstream end of the MTS. The flows will then be lifted into the New
Doha South (NDS) Sewage Treatment Works (STW) for treatment. The reclaimed
Treated Sewage Effluent (TSE) will be suitable for irrigation purposes and will be
returned to Doha metropolitan area.
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Project Location
2.2. Scope of Works
The works include, but are not limited to, the following:
2.2.1. Roads & Site Clearance
DW013 will require approximately 23.075 km of road to be built, consisting of the
3. Planning Methodology
QBC will start the work with the submission and approval of necessary permits for various pre-
construction plans, work method statements, material submittal for Procurement & Traffic
management Plan etc., in this stage the mobilization of the site offices, the required Manpower &
machinery will be carried out.
After receiving the approval of RO, Excavation Permits and the traffic Management Plan & Road
diversions approved by traffic police & other authorities and also with approval from Atkins, QBC
will execute the work without disrupting the traffic flow and temporary diversion will be
provided to fulfil the necessary traffic diversion.
The construction work is majorly divided in to different stages for package 1 & Package 2.
Package 1 divided in to 27 stages & Package 2 divided into 16 stages.
The work sequences are elaborately explained in the Baseline Programme substantiated with
optimum Resources and fully cost loaded work programme. (Refer the details in the Baseline
Program of this Submission). While each item of the scope of works will be executed and
completed then as built drawing also will be done in parallel to the Project Progress.
The Project will be closed out with the snagging after addressing of all snagging works
demobilisation and Handing over will be done.
4. Construction Approach:
QBC will divide the road section to part 1 and part 2 as represented in (Figure 1), and for part
1 the following utilities & road work will be carried out:
A. TSE (Pipeline, Chamber) if anyB. Ground water (Pipeline, Manhole, Gully)C. Foul sewer (Pipeline, Manhole, House connection)D. Potable Water (Pipeline, Chamber, House connection), if anyE. Electricity works, if anyF. Telecommunication works (Duct, Chambers), if anyG. Qatar National Broadband Network (QNBN) (Duct, Chambers), if anyH. Road Works (Earth works, sub base, Kerb, Base course etc)I. ITS (Ducts, Chambers), if anyJ. Street light (Cable, Base, Poles, Feeder Pillar)K. Irrigation worksL. Landscaping works
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Part 2 will be carried out after completion of base course of part 1 and diversion of traffic on part 1, following utilities & road work will be carried out:
A. Surface water (Pipeline, Manhole, Gully), if anyB. Foul sewer (House connection)C. Potable Water (Pipeline, Chamber, House connection), if anyD. Electricity works, if anyE. Telecommunication works (Duct, Chambers), if anyF. Qatar National Broadband Network (QNBN) (Duct, Chambers), if anyG. Road Works (Earth works, sub base, Kerb, Base course etc)H. ITS (Ducts, Chambers), if anyI. Street light (Cable, Base, Poles, Feeder Pillar)J. Irrigation worksK. Landscaping works
Figure 1
As stated earlier whole project of DW013 consists of two packages (Package 1 & Package 2), QBC will carry out the work under DW013 as follows:
4.1. Package 1
The following sequence will be followed for the above mentioned section:
Package-01
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Package-02
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Construction sequence will start from
Part 1 of the road with TSE, Foul water drainage & ground water pipeline works (excavation, pipe laying, and backfilling). Manhole excavation will start after excavation of pipeline and continue with following activities for manhole (blinding, tanking, protection, base slab, wall concrete, external tanking, cover slab, DI cover & backfilling). House connection Guiles excavation work will start after wall of manholes and follow by (Installation of gullies, backfill and grating). Road excavation at part 1 side will be follow the excavation of road and continue with (ducts, kerbs, sub-base up to base course), After completion of base course at part 1, work sequence will shift to Part 2 side of the road starting with surface water, potable water, electricity works, Foul water house connection works, QNBN works, gully installation & pipe laying works, street light, ITS & Irrigation works if any, simultaneously works like sub-base, base-course, wearing course, street lighting, landscaping works will continue as shown in below picture sequence.
5. Assumptions for the Baseline programme:
Baseline programme indicates the planning implementation with Major items which covers over all scope of the Project. While developing Baseline programme the following assumptions has been made in order to make a realistic construction approach and executable work programme as follows but not limited to:
(i) Activity durations and resource assignments& assumed daily production & required logics and their lags for predecessors and successors will be modified if necessary based on site obstructions/ interfaces and also unforeseen site conditions and unavoidable changes in QBC’s Construction Methodology. If necessary, programme will be subjected to modification due to changes in QBC’s construction methodology with information to Atkins.
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(ii) After the site handing over to QBC, QBC intend to start the work as soon as possible. Assuming that all the necessary permits and approvals from the Government/ Ashghal/ Kharamaa/ private authorities will be issued on time and no obstructions or delay in permits/approvals will stop QBC’s execution and work progress.
(iii) QBC assumed that all the client and Government authorities’ permits/ approvals will be on time without any delays, and no interruptions for the work to start and the client will provide always necessary work front in order to progress in execution of works.
(iv) QBC assumes that if any scope of the project changes, if any additional works are incurred it will affect the end date of the project and the client will accept the required time & cost allocation for such works as positive variations, additional works and time extension for QBC.
(v) QBC assumes that there is no electrical work at package-2 in our scope of work as there is discrepancy in road cross section and layout provided, which has notified by QBC through email dated 06th July 2015.
(vi) QBC assumes that there is no any requirement of dewatering.(vii) Sewer house connection for package 2 has considered as a future house connection as
per drawing details.(viii) Road excavation considered up to sub-grade bottom level.
6. Baseline Programme Description:
The Baseline Programme developed into activities in the following Stages & divisions:
1. General
2. Engineering
3. Procurement
4. Construction
5. Handing Over
For programming and planning purpose each sub division is further divided in to various levels
based on the type of activities involved.
6.1. General
6.1.1. Construction milestone:
The contractual milestones are included based on the conditions of the contract. The programme
of works starts with a start milestone as ‘Project Start Date’ which represents the commencement
of the project as 28th June 2015. The finish milestone ‘project Completion Date’ represents the
completion of the project as 16th February 2017 which includes the demobilization and the
handing over. The Project total duration is 600 days.
6.1.2. Mobilisation
The Third party insurance, Contractor’s all risk insurance, Performance bond etc are considered.
The site office setting ups for Engineer and contractor and gradual mobilisation of manpower &
machineries are considered
6.1.3. Permits/Approvals :
Road Opening Permits, Excavation Permit and MMUP permit and their respective
approvals are considered in order to execute the work.
6.1.4. Provisional Sum Instruction
These are the dates on or before which engineer should pass the instruction to
execute the work for the particular provisional sum items to complete the project
with in stipulated time frame.
6.2. Engineering
6.2.1. General Submittals: All general plans which include Project Quality Plan, Project
Safety Plan, Environment Plan, Project Baseline plan submission and their respective
approvals considered.
6.2.2. Material Submittal & Approval : The materials for all the items such as, DI pipe,
VC pipe and HDPE pipe, UPVC pipes & Ducts etc. will be submitted and will get the
approval.
6.2.3. Method Statement Submittal & Approval : The construction method statement
for all the items are included which are Surveying works, Dewatering Works,
Earthworks, Protection of Existing Underground service Utilities, Preparation and
laying of sub-base, Preparation and laying of Aggregate base, Asphalting works,
Traffic Signs and Road Markings, Kerbing & Foot way works, Street Lighting
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works, Civil structure works, Surface water drainage works, Manhole for all works
( TSE/ Sewer/ Drainage), Ducts works & Road Crossings Ducts, Relocation of water
pipelines, TSE works & Chambers, Irrigation & Landscaping works and their
respective submission and approvals are considered.
6.2.4. Subcontractor Submittal & approval : Subcontractors profile to be submitted &
obtained their respective approvals considered, which mainly include for Electrical
works, Irrigation works, Rebar works, Survey works, ITS & Telecommunication
works, Micro Tunnelling Works etc.
6.3. Procurement:
The construction materials like VC & ESCV Pipes & fittings, DI pipe & fittings, HDPE pipe &
fitting, GRP Pipes, RC Pipes, LV, MV & HV cables, Gully pots & grating, Street light cable,
feeder pillar, street light poles & fittings, Potable water valves, Fire hydrants, interlock &
kerbs are included in the programme and their respective, delivery to site etc. are
considered in the programme.
6.4. Construction
6.4.1. Part-1
6.4.2. Part 2
6.5. Project Close Out
It demonstrates the handing over for entire project to PWA, snagging list and as built drawings
if any.
6.6. Working hours:
The calendars considered for the projects, DW013. “The official holidays and non-working
days as per Qatar Labour Law were considered.. The normal working hours will be 8 hours
throughout the week except Friday as week end holidays. And the Week starts on
Saturday.
6.7. Programme Requirements:
The Baseline programme has been created according to Clause 14 of the conditions of
contract DW013: Construction of Road & Infrastructure in Al Sailiya – North of Salwa road .
(This also complies according to QCS 2014 clause 7.4 section1 parts, General conditions of
contract, clause 8.2.1, the frame work contract requirement under Vol 2, Schedule 1, Part
B, clause 1.18 for “Programme submissions”, and Procedure for schedule management for
GEC – relevant clauses for construction part).
6.8. Critical Path :
The critical path will be the activities of end stages as per sequence of work and
excavation of ground water pipeline.
7. Risk Assessment:
No. Description Affect
1 Traffic Diversion plan approval One way traffic diversion proposed by QBC
may be will take long time for approval by
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other parties and it will affect the start of the
work at site
2 Connection with existing
The connection of proposed network to
existing may be delayed if the existing
connection not ready, consequently will
effect on the completion of the project
3Instruction of provisional sum
items
The instruction of the provisional sum items
must be on time as identified in the baseline
programme and whether there is a delay will
badly affect the construction in site
4 Approved electrical schemeThe delay in approval of electrical scheme
will badly affect the construction in site
5Approved water and electrical
drawings from Kahramaa
Any delay in the approval of water and
electrical drawings from Kahramaa will have
a delay in the project
6 Interface with other contractor
Whether there is any contractor still working
in site, will badly effect on the progress in
site
7 Dewatering workDelay in approval of dewatering work will
badly affect the work in deep trench
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