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METHOD STATEMENT for a Cable Installation Company WAZIPOINT

-presented (FOR INFORMATION)

-on SEPTEMBER 2015

-by WAZIPOINT

I. GENERAL

1. Project Description

Under the terms of Tender No.-, WAZIPOINT  as Contractor, together with our specialist Subcontractor(s), will be responsible for completing all design, engineering, procurement, transportation/delivery to site, installation, related civil, and pre-commissioning, commissioning, and performance testing for the whole laying and commissioning of 132kV underground HV cables.

2. Project Organization

WAZIPOINT shall have the sole and overall responsibility to the client for the execution and implementation of the project. WAZIPOINT’s Project Team will be located in Seoul and at the site of the Works.

WAZIPOINT will appoint Project Manager at its head office in Seoul, Korea, and site office will be responsible for the overall management, control, and supervision of the execution of the Project.

The Project Manager shall observe and supervise the execution and status of the Project. Depending on the situation of the Project they shall mobilize whatever additional human resources, materials, and equipment deemed necessary to complete the Project on time and in compliance with contracts quality and schedule demands.

WAZIPOINT’s Head Office shall be primarily engaged in the procurement of major overseas equipment and materials, with the arrangements for inspection, expedition, insurance, and transportation of such equipment and the financial arrangements and support for the Project.

The Head Office shall provide full support and backup to the Project Team for the successful implementation of the Project and as the case may require, shall mobilize its human resources to Bangladesh and /or the countries of origin of overseas equipment and materials suppliers.

The Project Manager shall be located in the project office and shall have the total commercial and technical responsibility of the Project and be responsible for the overall management of the Project.

The Project Manager shall, together with the Project Team and subcontractors; provide overall direction and control, ensuring that all the Project goals are met and any required corrective actions are initiated in a timely fashion.

The Project Manager shall serve as the focal point for the communication between the client and the Main Contractor and shall chair the weekly meetings, the monthly meetings, and any other meeting with the client and regularly report to the client on date progress of the Project.

The Site Manager shall supervise and instruct subcontractors for the design, engineering, (local) fabrication, civil works & installation, construction, pre-commissioning, and commissioning of the Project.

The Site Manager shall report to the Project Manager on the day-to-day progress of the Project and shall regularly chair the meetings and subcontractors to determine the latest status of the Project and, as necessary, direct appropriate action to maintain the project schedules and overall requirements.

Under the management of the Project Manager, the Project Team consists of:

Ø  Civil Engineer (Site Manager)

Ø  Electrical Engineer (Site Manager)

Ø  Safety Manager

Ø  Administration Manager

The Project Manager, Site Manager, and Manufacturers’ S/V are well experienced in this kind of full turnkey project and have proven track records of successful projects in the past.

A dedicated Project Team will be set up, under the authority of the client Project Manager, to implement the Work Scope for this Phase of the Project, in a safe and efficient manner.

All personnel assigned to the Project, on a full-time basis, will be located in dedicated Task Force Areas. Specialist subcontractors for Civil Works, Installation, Test & Commissioning, Cabling, etc. shall be appointed. Meetings shall be established, to maintain communication with the Project Team and with a client for this Phase of the Works, the Kick-off Meeting for Design & Construction.

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3. Design/Engineering

The in-house engineering team of main Contractor will extend the overall direction, supervision and control of all technical matters, ensuring that all the parameters of the dedicated design and engineering work will be strict compliance with the contract requirements and the conditions of the Contract.

 The Engineering Them will conduct the detailed design and engineering of the Project and produce the design and engineering drawings and data for the approval by client.

The Engineering Team may appoint its subcontract(s) for particular works such as CAD drawings or special calculation etc.

The Engineering Team will also have responsibility for verifying the technical specifications of the suppliers of major equipment and materials comply with the project requirements.

The Engineering Team together with the subcontractors shall obtain the permits related to the detailed design and installation from the concerned authorities required for the Project.

4. Procurement

(Insert Procurement Details)

5. As Build Documentation

After the completion of work on Site all installation documentation will be revised where necessary to show the equipment as installed, and will submit those to client as per Technical Requirements.

II. Cabling Works

6. Route Survey

(1) Design Basis

Client’s Tender Drawings showing the proposed route corridor for each of the cable routes will be considered as the basic route for survey purposes.

It is understood the corridor has been allocated by the Planning Department and reference co-ordinate/datum points would be provided to Power Projects.

(2) Preliminary Route Survey

A walk-over survey and route length measurement, by wheel, would be initially conducted and proposed route drawings/key plans prepared.

At key plants on the route such as major road crossings, conflicts, with existing utilities, change in direction, joint bay locations and ever 200m along the straight lengths, Power Projects CAD (Computer Aided Design) system where a route profile will be made.

The tranches would be proposed at distances not exceeding 200m along the route in straight stretches and at all critical locations as described above.

(3) Trial Trench Excavation and Detailed Route Survey

After completing the required road opening procedures for excavation of trial trenches, excavation and collection of all existing services data would be carried out and drawings prepared. Detailed survey would also be carried out at this stage including fixing co-ordinates of all critical points along the route.

Based on the survey, collected site data from trial trenches and information received from other service authorities, a detailed route drawing would be prepared. The detailed route drawing, including cross sections and typical details, would be submitted to all concerned departments for final approval.

Once route approval is attained, remaining road opening procedures leading to excavation and road crossing permission would then be completed.

7. Site Survey and Engineering

Information must be collected from various Authorities to achieve the clarities of cables.

(1) Trial Pits

Application for Road Opening must be forwarded to have the authorization to excavate. Request form will be collected, filled and then submitted to Client together with cable route drawings showing the trial pits location.

After been commented and approved through specific forms by the various Authorities, permits will be granted by Client, for a given period of time and trial pit excavation may start.

(2) Survey

Topographical survey works are to be excavated by a qualified surveyor, expected cable routes, implementation of the join bays and typical cross section of the cable trench and of the road crossings will then be plotted.

8. Shipment and Inland Transportation

All cable drum will be shipped using bulk cargo vessels, all accessories will be shipped in container vessels.

Our nominated local clearing agency will complete the formalities for port clearance and will carry out inland transportation. The drum handling procedures recommended by WAZIPOINT would be followed and low bed trailers will be used for inland transportation of cable drums.

9. Road Crossing (Trench-less or open cut method)

(1) Authorization

Before commencement of the works authorization must be obtained from engineer. For this purpose specific form should be used.

(2) Marking

Mark the outline of the rod cutting and arrange diversions by displaying sign and boards. Traffic police / authority may inspect the works beforehand. Road crossing might be done one half at a time.

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(3) Excavation For Road Crossing

Wearing course is cut with mechanical rotating wheel cutter or other method. Trench is excavated to the required depth and ducts are placed with blocking concrete at both ends plus center to keep the proper implementation and spacing in between the ducts during the concreting. Duct bell mouths orientation is to be determined prior to 500mm beyond the verge and the central reserve of existing roads and one meter in case of future roads.

(4) Concreting

Concreting is done with required materials.

(5) Filling

Filling up above the road crossing up to the required level with compacted soil backfill.

(6) Surface Treatment

Carry out the asphalt reinstatement surfacing as per drawing.

(7) Form

Specific form must be filled in during and after completion of the road crossing.

10. Trench Excavation

(1) Excavation

Excavation will progress as per the approved schedule and will start only after approval from the concerned Authorities.

Trench route is marked, as per the approved route plan.

Display traffic and sign boards as required.

Excavate manually to expose all existing utilities close to the cable route and across. Existing services will be protected and secured as per the requirements of the concerned utility authorities.

Cross check with drawing that all underground services are located; relevant Authorities can be called prior excavating as instructed in some cases.

Excavation I done by manual and/or with hydraulic excavator /rack breaker (expect at location close to existing service) and excavated materials are either put in hip or trucked to disposal are for further use.

The base of the excavated trench shall be leveled and all sides vertical to the dimensions shown on the drawing.

Excavation will continue and proceed to completion.

(2) Sand Bedding

After approval of the trench dimensions, filling or sand bedding in trenches shall commence. Prior to using dune sand, a sample must be taken from the batch and tested, thermal properties and moisture content. Approved dune sand will be brought to the site and spread manually in the trench with minimum thickness of 200mm as bedding to the cables.

Arrange inspection and report of sand bedding.

11. Concrete Work

Location of the join bays and link boxes shall be approved before commencement of the works.

Ready mix concrete will be used throughout. Chutes will be used for base slab pours.

Reinforcement will be cut and bent in the Contractor’s yard and sent to the site via transportation. All the steel reinforcement installation and protection work will be done in accordance with the drawing and specification.

12. Earthing Cable at Joint Bay

Earthing cables are laid after joint bay completion as per drawing.  Earthing resistance value is measured after sand bedding and recorded on a specific form.

13. EHV Cables are laid with manpower and /or winch

(Insert details manpower list)

14. Trench Filling

(1) Back-filling with sand above cables

Approved dune sand free of stones must be used.

After arrangement of cables, sand is installed up to 500mm measured from bottom of trench and top surface is leveled. During this operation, care must be taken for not scratching or damaging the outer sheath with sharp tool such as shovel.

(2) Laying of cable slabs

Slabs are placed in a yard and transported to site after curing well.

(3) Electrical test on outer sheath

This test is carried out for every section before backfilling over the cable slabs.

(4) Backfilling

Backfilling in the remainder of the trench is with selected material containing excavation. Any material which could be harmful is to be removed. Comparing single drum rollers to bring fill levels up as specified. At 300 mm above the cable slabs, warning tape is laid. The backfill material will be compacted layer by layer, 150mm thick.

(5) Trench reinstatement

All reinstatement shall be carried out as client specification.

(6) Route Markers

Route markers of approved designs to be installed at certain intervals as per requirement (road crossing, abrupt deviation, joint bays, etc..). The above works shall be inspected and recorded.

15. Pre-commissioning and commissioning

Upon complete laying, jointing and terminating each circuit, pre-commissioning and acceptance tests would be conducted duly witnessed by Client and other concerned agencies. The Project Manager, with assistance with the Testing Engineer and Technicians, will directly undertake this phase.

Again, as part of the QCP plans, Testing Method Statements and Procedures, Report Formats would be kept ready pre-approved as well as all required calibrated Test Equipment for the purpose. Upon completion of all acceptance tests at site after installation as per specifications requirements, commissioning of each circuit would be carried out in conjunction with Client departments based on detailed outage planning for existing circuits and load change over.

16.  As-Built Documentation

During the installation phase, changes to be approved drawings would be marked up and records kept for final compilation of as-built records. These site marked up records are used as the basis together with the accurately verified site data and as built records prepared for use by client.