2. Baseline Programme Narrative -LIS-02

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

Baseline Schedule Design and construction of lateral interceptor sewers, Al Wakra Page No: 1

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


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.


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


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


Package-02


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.


(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


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


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


Documents

2. Baseline Programme Narrative -LIS-02