century power work programme details

7/30/2019 Century Power Work Programme Details

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Document Identification Number

HC-CEN-ENG-103

Revision: R01

Status: ITT

Document Type:ENG

System/Subsystem: 00 Discipline : ENG Rev Date : 12 Mar 2013 Page 1 / 17

CLIENT: CENTURY POWER LTD WORK PROGRAMME

CENTURY POWER GENERATION 1500MW POWER PLANT PROJECT ATOKIJA ANAMBRA STATE

PROGRAMME OF WORKS FOR

ENGINEERING, PROCUREMENT AND CONSTRUCTION OF SITE FENCEAND GUARD HOUSE FOR THE 1500MW OKIJA POWER PLANT

Rev Status Date Revision memo Issued by Checked by Approved by

R01 IFR 12/03/13 Issue to Tender (ITT) O. NWOKORO W. OLATOYE M. NNANNA


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PROJECTCONTROL REPORT


HC-CEN-ENG-103

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DOCUMENT REVISIONS

Revision Number Revised Date Description of Change

0 15-Mar-13 First issue for Tendering


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TABLE OF CONTENTS1.0 INTRODUCTION ................................................................................................................................... 51.1 PURPOSE ............................................................................................................................................. 51.2 SCOPE OF WORK. ............................................................................................................................... 51.3 DEFINITION OF TERMS AND ABBREVIATIONS ................................................................................ 61.4 THE ORGANISATIONAL STRUCTURE ............................................................................................... 7

1.4.1 Operations at the Hammakopp Consortium Office in Okija ..................................................... 71.4.2 Operations at the Construction Project site ............................................................................. 71.4.3 Project Division Organogram .................................................................................................. 8

2.0 PRELIMINARY WORKS ....................................................................................................................... 92.1 KICK-OFF MEETING ............................................................................................................................ 92.2 MOBILIZATION ..................................................................................................................................... 9

2.2.1 Pre-mobilization ...................................................................................................................... 92.2.2 Materials Mobilization .............................................................................................................. 92.2.3 Material collection/ Request .................................................................................................... 9

2.3 SETTING OUT OF WORKS ................................................................................................................ 102.4 PROJECT DRAWINGS, PHOTOGRAPHS & SURVEY WORKS ....................................................... 103.0 FENCING WORKS .............................................................................................................................. 103.1 UPLAND FENCING ............................................................................................................................. 10

3.1.1 Excavation of Trench along Fence Line (Maximum Depth of 750mm Depth) ....................... 10

3.1.2 Blinding ................................................................................................................................. 103.1.3 Casting of Foundation Strip for Fence Line ........................................................................... 11

3.2 SWAMP AREA FENCING ................................................................................................................... 113.2.1 Excavation & Compaction of Trench along Fence Line (Maximum Depth of 1000mm Depth)113.2.2 Blinding ................................................................................................................................. 123.2.3 Casting of Foundation Strip and Ground Beam for Fence Line ............................................. 12

3.3 SANDCRETE FENCE ERECTION ...................................................................................................... 133.3.1 Concrete Column and Column Base ..................................................................................... 133.3.2 Concrete Coping ................................................................................................................... 133.3.3 Installation of Hangars and Barb Wires ................................................................................. 13

4.0 SITE ACCESS WORKS ...................................................................................................................... 134.1.1 Provision of Laterite Fill materials ......................................................................................... 134.1.2 Sub-Grade leveling to Shape ................................................................................................ 134.1.3 Fabrication Painting and Installation of Gates ....................................................................... 14

5.0 GUARD HOUSE WORKS ................................................................................................................... 145.1 SUBSTRUCTURE ............................................................................................................................... 145.2 SUPERSTRUCTURE .......................................................................................................................... 14

5.2.1 Ground Floor ......................................................................................................................... 145.2.2 First Floor .............................................................................................................................. 145.2.3 Roof ...................................................................................................................................... 155.2.4 General Building Works ........................................................................................................ 15

5.2.5 Finishes ................................................................................................................................. 156.0 COMMISSIONING WORKS AND DEMOBILIZATION/CLOSE-OUT .................................................. 156.1 Additional Works / Site Clean Up ..................................................................................................... 156.2 Review of As-Built Engineering Design Outputs ............................................................................ 157.0 SCHEDULE OF WORK ....................................................................................................................... 15


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8.0 EQUIPMENTS LIST ............................................................................................................................ 169.0 SCHEDULE LAYOUT ......................................................................................................................... 17


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1.0 INTRODUCTION

1.1 PURPOSE

The purpose of this draft is to provide a working document that provides the details of how the scope ofwork shall be executed for the Engineering, Procurement and Construction of Site Fencing and GuardHouse Works

for the 1500mw Power Plant in the CENTURY POWER GENERATION INDUSTRIAL

AREA PROJECT.

The work methods describe the activities and responsibilities for effective co-ordination of the workpackage. It gives details of the respective work units in the project and how each item shall beexecuted with clear analysis of the resources items to be implemented in accomplishing the settargets.

1.2 SCOPE OF WORK.

The Scope of work covers the following aspects of the work:

1. Preliminary works which includes Detailed Designs produced for the entire scope describedherewith and the Setting-out Works to determine coordinate and spot heights of the cardinalcontrol points of the fence line, site access and the guard house zones in the Power PlantFacility.

2. Fencing Works for the Power Plant Facility which basically involves erection specifications forthe Upland and Swamp Region of the Site.

3. Site Access Works which includes completion of linked site access to the expressway to theindustrial area, the provision of a Lay-by/Parking lot to accommodate vehicles to be checked inand for parking purposes. The fabrication and installation of the gates are also included in thissection.

4. Guard House Works illustrating the sequences of construction activities to be carried out.

5. Commissioning Works and Demobilization/Close-Out


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1.3 DEFINITION OF TERMS AND ABBREVIATIONS

Contract - SITE FENCING AND GUARDHOUSE WORKS FOR THE1500MW POWER PLANT.

Contractor - An entity (HAMMAKOPPCONSORTIUM) assigned to

perform the work described in thecontract.

Consultant AF-COLENCO LIMITED

CLR - Company Legal Representative,HAMMAKOPP

DC - Document Controller

DCC - Document Control Centre

HAMMAKOPP - HAMMAKOPP CONSORTIUMLIMITED

Disciplines - Any section or group within theHAMMAKOPP Project Teamorganization whether technical ornon-technical.

DR - Document Register

PPF - Power Plant Facility

GMP - General Manager, Projects -HAMMAKOPP

HPT - HAMMAKOPP Project Team

PROJECT SITE FENCING AND GUARDHOUSE WORKS FOR THE1500MW POWER PLANT.

GME - General Manager, Engineering -HAMMAKOPP

BOQ - Bill of Quantities

FTO - Freedom To Operate

OKJ

HSSE

-

-

HAMMAKOPP Office Okija

Health, Safety, Security andEnvironment

CPM - Construction Project Manager


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1.4 THE ORGANISATIONAL STRUCTURE

The HPT comprises Site operation Team and office support operations. See Organisation Chart below.

1.4.1 Operations at the Hammakopp Consortium Office in Okija

The project team is headed by the Construction Project Manager (CPM) who reports directly to theGMP. Within his jurisdiction is the Project Engineer to coordinate information within their sphere forappraisal by the HPT headed by the Construction Project Manager.

Weekly and Monthly reports and progress details are articulated by the HPT and effective informationand communication dissemination is handled by this division.

1.4.2 Operations at the Construction Project site

The project team at the Site is headed by the Project Engineer (PE) who reports directly to theConstruction Project manager (CPM). Within his jurisdiction are the QA/QC Coordinator, Site Engineerand the HSE-MS Coordinator. All coordinate information within their jurisdiction for appraisal by the

HPT headed by the Construction Project manager (CPM).Weekly and Monthly reports and progress details are articulated by the project team at the site andeffective information and communication dissemination is handled by this unit and transmitted viacourier or electric media to the Okija office operation.


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1.4.3 Project Division Organogram

GM

PROJECTS

HSE-MS

COORDINATOR

(HSE)

BUILDING

GENERAL

FOREMAN

ROAD

PAVEMENT WORKS

SUPERVISOR

PROJECT

COMMUNITY

LIAISON (CLO)

PROJECT AUDITOR

(PA)

PROJECT

ENGINEER

(PE)

QA/QC

COORDINATOR (QC)

ROAD EARTHWORKS

SUPERVISOR

CONST. PROJECT

MANAGER (CPM)

HSE

MANAGER(HM)

QUALITY

MANAGER(QM)

SITE

ENGINEER (SE)

BUILDING

CONSTRUCTION

CREW

PAVEMENT

CONSTRUCTION

CREW

COMMUNITY

REPS

AUDIT

TEAM

EARTHWORKS

CREW

DOCUMENT

CONTROLLER/ PROJECT

SEC (DC)

DESIGN

ENGINEER /

PLANNING & CONTROLS


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2.0 PRELIMINARY WORKS

2.1 KICK-OFF MEETING

The kick off meeting shall be held in the clients premises. The major agenda of this meeting is for bothparties to understand the scope of the job and make all necessary clarification on the job.

2.2 MOBILIZATION

2.2.1 Pre-mobilization

Pre-mobilization of all equipment/tools, materials and personnel for civil construction will commencefirst.

2.2.2 Materials Mobilization

.

2.2.3 Material collection/ Request

Materials needed to complete the project shall be made to the procurement department and copy ofthe request is made available to the CPM these are:-

Coarse and fine aggregate chipping

Prepared rebar from Port Harcourt

Sawn form works

Dewatering Pump

Tools and consumables

Safety Materials for the project

List of materials which is available from the materials take off documents, copy of MTO is forwarded tomaterials section for procurement.


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2.3 SETTING OUT OF WORKS

The setting-out works shall be wholly executed by the survey team. The team shall first visit the siteand do a re-alignment of the fence line with respect to the position from the existing expresswayfeature. This will facilitate the positioning of the centre line of the site access road and then the buildingline offset from the centreline. This will be achieved by using coordinates read from the GPS PrecisionInstrument/Device.

2.4 PROJECT DRAWINGS, PHOTOGRAPHS & SURVEY WORKS

Development of project drawing is an intrinsic part of the works of this segment.

A. First we crosscheck the project scope containing preliminary design parameters and try and clarifysome of the items of the design and then produce the detailed drawings of the works therein described.

B. Our surveyors shall then move in using the consultants control to re-produce the coordinates of theproposed fence and compare figures.

C. During the filling for the different site access road profile the surveyors retakes the profile so we canestimate the volume of the respective filling made for the particular layer.

D. During the construction of the fence the surveyors also carries out check levelling to ascertain thegradient for stepping down the fence foundation at the different intervals along the fence perimeter

E. Drawings of the finished level which includes drawings for the fence boundaries and shall form part ofour As-Built submissions.

F. Photographs shall be taken periodically as part of the deliverables of the project works. This shall showall the respective segments of the work in progress for progress reporting.

3.0 FENCING WORKS

3.1 UPLAND FENCING

3.1.1 Excavation of Trench along Fence Line (Maximum Depth of 750mm Depth)

The fill material along three sides of the fence boundary of total length 1701.14m shall be removedusing the JCB Excavator of 2.3m3-capacity output. The fill material shall be deposited in layers to theswamp region to make up the fill levels or will be deposited as directed by the client party

3.1.2 Blinding

A design mix of 1:5:10 mass in-situ concrete in accordance with BS 882 shall be used for this purpose.This work item involves the placing of Grade C15 Concrete to a minimum thickness of 50 mm layerunder all foundations indicated on the IFC Drawings.


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3.1.3 Casting of Foundation Strip for Fence Line

3.1.3.1 Formworks

20mm thick Plywood materials, sawn hard wood and adjustable steel prop will be used for the work

All forms to receive fresh concrete to grade foundations shall be constructed in accordance with BS8110, Part 1, and Section 6.9.

Forms shall be built up and erected in line with the dimensions and instruction indicated in respectiveFormwork/Reinforcement drawings.

Materials used shall have no surface defects and shall be resistant to the action of cement and water.It shall be rigidly constructed and be mortar-light. Timber for formwork shall be well seasoned, goodquality, free from cracks, shakes, loose knots and other defects. Timber and metal once used informwork shall be cleaned and satisfactory reconditioned before being re-used.

3.1.3.2 Concrete Work

A design mix of 1:2:4 mass in-situ concrete in accordance with BS 882 shall be used for this purpose.This work item involves the placing of Grade C20 Concrete to a minimum thickness of 225 mm layer onthe blinding as indicated on the IFC Drawings. The width shall fall within but not necessarily exceed675mm.

3.1.3.3 Assembly / Installation of Heras Fencing

The Heras security welded mesh system shall be installed to achieve the highest level of security,providing a lasting result to the clientele. The mesh panels shall be assembled in such a way to providea high degree of security, whilst giving a discreet visual impact on the environment. The meshapertures shall provide see-through visibility. The Heras fence will be installed with stainless steel poststhat will be monolithically recessed into the foundation strip.

3.2 SWAMP AREA FENCING

3.2.1 Excavation & Compaction of Trench along Fence Line (Maximum Depth of 1000mm

Depth)

The fill material along fence boundary parallel to the Ulasi River at the swamp region of the PPF. Anestimated volume 913m3 shall be removed using the JCB Excavator of 2.3m3-capacity output or . Thefill material shall be used for backfilling and to make up the fill levels or will be deposited as directed bythe client party. The sides of the trench will be compacted using a Mobile Tamper or Hand Compactor

in order to achieve the required bulk density for restraining earth movements at the flood plain prior tothe commencement of foundation works. As the need may arise timbering to support sides of thetrench may be employed. This information


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3.2.2 Blinding

A design mix of 1:5:10 mass in-situ concrete in accordance with BS 882 shall be used for this purpose.This work item involves the placing of Grade C15 Concrete to a minimum thickness of 75 mm layerunder all foundations indicated on the IFC Drawings.

3.2.3 Casting of Foundation Strip and Ground Beam for Fence Line

3.2.3.1 Formworks

20mm thick Plywood materials, sawn hard wood and adjustable steel prop will be used for the work

All forms to receive fresh concrete to grade beams, foundations, slabs, columns, etc. shall beconstructed in accordance with BS 8110, Part 1, and Section 6.9.

Forms shall be built up and erected in line with the dimensions and instruction indicated in respectiveFormwork/Reinforcement drawings.

Materials used shall have no surface defects and shall be resistant to the action of cement and water.It shall be rigidly constructed and be mortar-light. Timber for formwork shall be well seasoned, goodquality, free from cracks, shakes, loose knots and other defects. Timber and metal once used in

formwork shall be cleaned and satisfactory reconditioned before being re-used.

3.2.3.2 Reinforcement Preparation

Steel Reinforcement shall be in accordance to DEP 34.19.20.31-GEN Reinforced Concrete Structure,Paragraph 5.3 Reinforcement. We shall prepare rebar bending and cutting from the workshop in OKJand the bending and shaping shall comply with BS 866:2000 and with BS 4449 hot rolled highly yielddeformed bars grade 460. This will serve to facilitate a monolithically recessed ground beam in the thefoundation

3.2.3.3 Concrete Work

A design mix of 1:2:4 mass in-situ concrete in accordance with BS 882 shall be used for this purpose.This work item involves the placing of Grade C20 Concrete to a minimum thickness of 225 mm layer onthe blinding as indicated on the IFC Drawings. The width shall fall within but not necessarily exceed675mm. The same shall apply for the ground beam (Minimum of 225mm depth) to be casted on thefoundation strip.


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3.3 SANDCRETE FENCE ERECTION

The fence shall be constructed using 450mm x 225mm x 225mm sandcrete hollow block. Each blockshall be moulded by a prescribed mix. The blocks shall be layed in stretcher bonds solidly bedded in a1:3 cement mortar. The physical perimeter shall consist of an fence of 4.5m in height to cover for twolonger boundaries of the Upland Area and the boundary along the swamp area. The Perimeter Fencemust not to be closer than 10m from the buildings with the PPF except in cases where the site is anexisting site and site limitations are experienced. The perimeter fence shall enclose all the holding unitsand all the support buildings within the facility and shall also be rendered and painted on both sides as

required.

3.3.1 Concrete Column and Column BaseA design mix of 1:2:4 in-situ concrete in accordance with BS 882 shall be used for this purpose. Thiswork item involves the placing of Grade C25 Concrete to a concrete form of 225mm x 225mm x4500mm for the column and 400mm x 400mm x 350mm on the blinding as indicated on the IFCDrawings.

3.3.2 Concrete CopingA design mix of 1:2:4 in-situ concrete in accordance with BS 882 shall be used for this purpose. Thiswork item involves the placing of Grade C25 Concrete to a concrete form of 375mm x 100mm for the

coping on the fence as indicated on the IFC Drawings.

3.3.3 Installation of Hangars and Barb WiresThis involves the installation of 50mm x 50mm x 6mm Y-shaped angle iron bar to be welded to the topmesh of the coping formwork so as to recessed into the coping cast concrete. Barbe wires asdescribed in the BOQ shall also be installed on the hangars

4.0 SITE ACCESS WORKS

4.1.1 Provision of Laterite Fill materials

Fill materials from the upland region below top soil excavation depth have been identified from the soilinvestigation report as Laterite by the consultant. This information has also being confirmed on site.The Lay-By/Parking Lot and the Site Access Zone shall be developed by laying, grading andcompacting the filled materials from cutting depths using the grader and vibrating roller.

4.1.2 Sub-Grade leveling to ShapeThe sub-grade is graded to shape to determine the design ground formation at the equipment zonesand the roads for mass haul for both cut and fill. Where the sub-grade has an unacceptable soilformation the soil shall be excavated and cut to spoil using bulldozer. The sub-grade levelling shall be


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done using Graders, vibrating Roller and Sheep-foot for consolidation. The design camber shall be1:20 i.e. 5% and is achieved using the grader.

4.1.3 Fabrication Painting and Installation of GatesThis is basically to be executed as directed by the CONTRACTOR

5.0 GUARD HOUSE WORKS

5.1 SUBSTRUCTURE

The sequence of tasks to executed include the following

1. EXCAVATION AND BLINDING2. REINFORCED CONC. WORK FOR FOUNDATION BASE/STRIP FOOTING3. REMOVAL OF FORMWORK/BACKFILLING AROUND FOUNDATION4. BLOCK WORK UP TO DPC LEVEL

5.2 SUPERSTRUCTURE

5.2.1 Ground FloorThis floor shall contain the following compartments

Office (2 Nos)

Reception

Toilet (2 Nos)

Waiting Room

Electrical Control Room

The sequence of tasks to executed include the following

1. FORMWORK FOR GROUND FLOOR CASTING2. HARD CORE FILLING & COMPACTION / BRC MESH3. GROUND FLOOR REINFORCED CONCRETE SLAB CASTING4. FORMWORKS/IRON MONGERY FOR RC COLUMNS AND LINTELS5. BLOCKWORK TO LINTEL LEVEL6. CASTING OF REINFORCED CONCRETE COLUMNS7. CASTING OF R.C LINTELS8. BLOCK WORK TO BEAM LEVEL

5.2.2 First Floor

This floor shall contain the following compartments Security View Area

Dressing Room

Circulatory Space


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Security Control Center

Conveniences (4 Nos)

Rest Room (2 Nos)

Kitchen

5.2.3 Roof

5.2.4 General Building Works

5.2.5 Finishes

6.0 COMMISSIONING WORKS AND DEMOBILIZATION/CLOSE-OUT

6.1 Additional Works / Site Clean Up

As work progresses on site, there shall be provisions for additional works to be included in the contractsum such as external works and landscaping which was properly detailed in the original documentprovided by the Consultant.

6.2 Review of As-Built Engineering Design Outputs

From the forgoing additional construction operations and possible variation in scope of work, a reviewwill be required to develop accurate designs, specifications, and estimates on the existing deliverables.

7.0 SCHEDULE OF WORK

The schedule of work for the Site Fencing and Guard House Works basically covers the time andresource allocation details for effective tracking of schedule performance. The work will be executedusing a six-working day calendar. The projected duration of the work is 224 days. The detailed projectschedule and other details is attached to this document.


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8.0 KEY EQUIPMENTS LIST

S/NO DESCRIPTION QTY

1 EXCAVATOR 1

2 PAY LOADER 1

3 25 TONS TRUCK 6

4 GRADER 1

5 MOBILE MIXER 2

6 WATER TANKER 1

7 CONCRETE PUMP 1

9.0 SCHEDULE LAYOUT


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