地下管线保护施工方案 英文

1、Method StatementDocument Title:Protection of Existing UtilitiesDocument Number:Document no.:EXW-P011-0000-CM-CHE-MT-00027 -Rev.CCName & SignaturePositionDatePrepared By: Technical EngineerReviewed By:Technical EngineerApproved By:Deputy PMRevision HistoryRevisionDateDetails of revisionCA22-Jan-2014

2、Submit for approval CB 16-Feb-2014Comply with the comments from Halcrow dated on 05-FEB-2014 CC1-Mar-2014 Comply with the comments from Halcrow dated on 01-Mar-2014SectionCONTENTSPage 1.0Purpose of Protection of Existing Utilities3 2.0Scope of Protection of Existing Utilities3 3.04.0Reference:Defini

3、tions:335.0Personnel & Responsibilities4 6.0Permits and Licences5 7.0Resources to be used for Protection of Existing Utilities 58.0Detailed method of carrying out this method statement 69.0Quality Control and Requirements1010.0Health & Safety Considerations611.0Environmental Considerations1112.0Appe

4、ndices 14Appendix A-Risk Assessment 14Appendix B-Tool Box Talk 18Appendix C-Inspection and Test Plan 19Appendix D - Checklist Form 21Section 1.0: Purpose of Protection of Existing UtilitiesThe purpose of this Method Statement is to outline the procedures and techniques which are to be adopted in pro

5、tection of existing utilities which is to be carried out in P011 project area.Section 2.0: Scope of Protection of Existing Utilities This scope covered in this method statement is to outline the methodology for execution of all works related to the Construction of the Protection of Existing Utilitie

6、s. This statement shall cover all the trenches for Power Supply (EHV/HV, MV and LV etc.) Works, Potable Waters, Irrigation(TSE) and Fire Water Lines, (Storm Water Drainage Pipes, Station Sewage Lines, Q-Tel works etc.), ITS and SSD, including setting out, excavation, installation of protection slab,

7、 backfilling, compaction and reinstatement etc. This method statement does not include the spilt duct protection for existing electricity cable crossing the road.Section 3.0: Reference:Work carried out and testing performed under this Section of the Specification shall comply with the requirements o

8、f the following Standards to the extent that they are relevant and not overridden by the Specification. Qatar Construction Specification Section 8,Part 2(QCS2010) and Section 20, Part4(QCS2010). Project specification. Project Quality Plan Doc. No.EXW-P011-0000-CM-CHE-PQ-00001-Rev.CE Shop drawings. K

9、ahramaa Water and Electricity General Specification Kahramaa Regulations for Clearances and works in the vicinity of Extra-High Voltage installations Project Health & Safety Plan EXW-P011-0000-HS-CHE-PL-00048; Construction Environmental Management Plan EXW-P011-0000-YE-CHE-PL-00071;Section 4.0: Defi

10、nitions: Client : ASHGHALProject Manager : KBRSupervision Consultant : HalcrowContractor : China Harbour Engineer Company Limited (CHEC)QCR : Quality Control RecordITP : Inspection and Test PlanQA/QC : Quality Assurance / Quality ControlJSA : Job Safety AnalysisRA : Risk AssessmentHSE : Health, Safe

11、ty and EnvironmentP.S : Project SpecificationSection 5.0: Personnel and ResponsibilitiesPlease refer to the following table for manpower:No.Job TitleQuantity1Construction Manager12HSE Engineer13Safety officer14Site EngineerFor one excavation and backfilling section5Surveyors26General foremenFor one

12、excavation and backfilling section7Operators/DriversFor one excavation and backfilling section, depends on site condition8 Skilled LabourFor one excavation and backfilling section, depends on site condition9Electricians2The work of Protection of Existing Utilities will be carried out by CHEC, headed

13、 by the Construction manager. Construction Manager responsible for the construction work coordination and arrangement of civil works, in charge of site engineer. To get under control HSE requirements as well as QA/QC. HSE Engineer/Safety Officer responsible for HSE on site during construction, coord

14、inate with Site Engineer. Coordinate Tool Box meetings and improve the content. Stop any unsafe act/work and report immediately to the HSE manager & construct manager. QC Engineer responsible for quality of structure on site during construction, coordinate with Site Engineer. Surveyor responsible fo

15、r survey work and settlement monitoring work on site, coordinate with Site Engineer. Site Engineer Site engineer responsible for site demolition and clearance work, coordinate with HSE Engineer, QA/QC engineer, surveyor, will in charge of foremen, operators, masons, drivers, labour, reports directly

16、 to construction manager. Construction Superintendent / Foreman-directly supervises the work activity on the site and has full control over the use of the labour, plant and equipment. He ensures that the work is carried out in full compliance with the specification, and in a manner that conforms to

17、the safety requirements. He reports to the Site Engineer when the work is complete and ready for inspection. All personnel (operators) involved in lifting, confined space, drilling, welding, construction plant and equipment etc, should be qualified and the relevant certificate should be available. Q

18、uality Control Inspector-Ensure that all activities that are required to be inspected in the construction have been inspected and approved. Accompany the company representative while carrying out inspections and release hold points. Issue NCRs when and where required and ensure that construction pro

19、vides the appropriate corrective and preventive action.Section 6.0: Permits and LicencesWork permit shall be provided and a copy shall be kept on site. Where required as per project contract specification, permits & licences shall be obtain from relevant authorities prior to start with the related w

20、orks or activities.Section 7.0: Resources to be used for Protection of Existing Utilities 7.1 Technical InformationReferences: Qatar Construction Specification Section 8,Part 2(QCS2010) and Section 20, Part4(QCS2010). Project Specification. Method statement of engineering survey: CHEC-CEC-MT-001-0.

21、Method statement of soil filling and compaction for road works: EXW-P011-0000-CM-CHE-MT-00011. CHECS HSE Plan & Quality Plan.7.2 EquipmentPlease refer to the following table for equipments:S/NItemQuantityRemark1JSB Excavator with backhoeseveralFor one excavation section2Manual excavation toolssevera

22、lFor one excavation section3Wheel loaderseveralFor one excavation section4Jack hammerseveralFor one excavation section5Dump truckseveralFor one excavation section6Load bed Trailers17Asphalt/Concrete cutting machine18Plate CompactorSeveralFor one backfilling section9Survey equipmentSeveral Leveling m

23、achine to be on site for monitoring10Water TruckSeveral For one backfilling section11Mobile Crane112Metal Detector113Lab equipmentLS 14Light towers115Tower light severalFor one excavation and backfilling sectionSection 8.0: Detailed method of carrying out this method statement8.1 Preparation Works A

24、n overall project schedule developed shall include the sequence of civil works, necessary equipment, tools and procedure for various civil works activities. Prior to commencement of work all materials, resources, Personnel Protective Equipment (PPE) and necessary equipment and tools shall be set in

25、place. Approved written procedures, material approvals and necessary inspection request forms shall be made available before start of work. Only skilled personal will be deployed for carrying the protection of live existing utilities. Prior to start any works make sure that approved SIS (service inf

26、ormation sheet) is available. Before excavation commence, the area to be excavated should be carefully marked out and then, where appropriate, by the use of cable location device the position of each cable in the vicinity should be determined as far as possible. Scanning and trial holes shall be don

27、e prior to commencement of trench excavation. Coordinate with Kahramaa supervisor and other End Users for necessary inspections. Make sure that a supervisor and safety officer from contractor available full time at site. Information on the position and depth of cables in the proposed work area shoul

28、d be recorded on plan by those responsible for the works so that it can be readily understood by the supervisors and works carrying out the work at site.8.2 Sequence for Undertaking Protection of Existing UtilitiesThe construction procedure of undertaking this work is shown in the following chart:Di

29、agram 8.1 Sequence for Undertaking Protection of Existing Utilities8.3 Surface Cleaning.After preparation work has been completed, Contractor shall clean the surface of the existing ground. Any existing unsuitable material shall be removed.8.4 Jobsite BarricadeThe jobsite shall be barricaded with re

30、quired material/device in proper way with appropriate signage. All the safety measures shall be checked and approved by HSE department with written record before commencement.8.5 Survey Setting OutBefore beginning trench excavations, the route of the pipeline shall be surveyed and set out accurately

31、 and the existing ground level shall be agreed with the Engineer. The relevant information shall pass to in-charge site engineer and foreman with written record.8.6 Mark out the Lines.The centreline and the edge of the trench shall be marked out in site as shown on the drawings. Complete full scanni

32、ng for area with cable detector and mark utilities direction. Besides, trench excavation shall be carried out by such methods and to such lines, dimensions, and depths as shall allow for the proper construction of the Works.8.7 Excavation.The structure of the road and the typical section for existin

33、g utilities protection are show in the following drawing.Based on the soil conditions, the excavation shall be 500 mm from existing ground level mostly by machinery and some finishing works shall be done manually. The excavated material shall be disposed to designated location with care. Trench exca

34、vation width according to type of existing Utilities, as per approved shop drawings. Where trenches are excavated open cut in roads, the asphalt shall be saw cut along the edges of the trench, prior to excavation. In the lanes of the road that remain open to traffic, road drains and channels shall b

35、e kept free from construction materials, debris and obstruction at all times. The Engineer may direct the trench excavation to be realigned from that shown on the Drawings to facilitate the flow of traffic. Any excavation carried out by the Contractor to prevent slips and fall, or should portions of

36、 trench walls slip or fall away, the Contractor shall at his own expense take all necessary remedial measures including the excavation removal and reinstatement of all the ground thereby disturbed.8.8 Installation of Reinforced Concrete Slabs: Protection slab would be pre-cast and shall comply with

37、the requirements of relevant specification. Precast Protection slab will be transported to the site by trailers and stored in a designated area in the vicinity of where they are to be installed. After excavation of 500 mm from existing ground level, the excavated area need to be compacted and leveli

38、ng. The area around the utilities shall not to be disturbed. Concrete provided as a protection to pipes shall be Grade C20, placed to the required depth in one operation. The reinforcingsteelbar and the concrete shall comply with the relevant specification8.9 Backfilling and Compaction The backfilli

39、ng shall be (2 Layers) done by layers of which maximum loose (uncompact) thickness shall not exceed 150mm the layer markings shall be in place in order to control the loose thickness. Approved material is to be used for backfilling; Marking tape to be installed after the first layer of backfilling t

40、he trench. The material shall be watered and compacted to achieve the required dry density; Fill material shall be compacted not less than 95% dry density. For more details review the attached drawing . Backfilling shall, wherever practicable, be undertaken immediately the specified operations prece

41、ding it have been completed. Backfilling shall not, however, be commenced until the parts of the Works to be covered have achieved a strength sufficient to withstand all loading imposed thereon. Backfilling around existing structures shall be undertaken in such manner as to avoid uneven loading or d

42、amage. Where the excavations have been supported and the supports are to be removed, these, where practicable, shall be withdrawn progressively as backfilling proceeds in such a manner as to minimise the danger of collapse. All voids formed behind the supports shall be carefully filled and compacted

43、 8.10 Install SignboardCHEC shall install some signboard near the excavation area. Marker Posts will then be installed as required by approved drawings.Section 9.0: Quality Control and Requirements All workers shall be adequately experienced All relative documentation such as method of statement , q

44、uality procedures etc. shall be available at work location. All sites shall be visited and inspected in detail. All inspection shall be as per approved project ITPs/QCPs. The Contractor shall provide the necessary testing apparatus for monitoring soil properties and shall maintain the apparatus in g

45、ood order. A daily log of test carried out shall be provided to the Engineer. Testing of soil properties shall be carried out by an approval laboratory. The Contractor shall ensure that the material laid immediately next to a structure, concrete wall or thrust block is well compacted as per specific

46、ation.Section 10.0: Health & Safety Considerations10.1 General safety issues Staffs should wear full set of PPE (Helmet + Safety Shoe + Reflective vest + Eye Goggle) and fire fireextinguisher, first aid kit, ear plugs, communication devices, warning signals, safety tapes, lighting for illumination,

47、red flusher, green flusher as minimum requirement while on the site. The workers should wear additional PPE when performing specific task as per safety rules and regulations of the project. Operator must have valid certificate for proper equipment operation. Operator must maintain daily equipments c

48、omplying with operation requirement. Barriers were arranged to separate the work place. Regular safety checks will be performed to eliminate potential hazards and to conform to safety regulations. The safety precautions should meet the requirements of QCS2010. Safety shall follow and ensure that the

49、re shall not be any damage to the existing live underground services while excavation of cable trench.10.2 Emergency ArrangementAll injuries, serious incidents and property damages shall be reported to Safety Officer and the clients resident site representative as soon as possible while clients inci

50、dent reporting process will be followed.Death / Serious Bodily Injury / Crisis The Project Manager/ Site Agent / Safety, Health & Environmental Manager / Safety Officer / relevant Government Departments (E.g. Labour Department or Police, etc.) will be verbally informed immediately. The Safety Office

51、r will prepare and submit a preliminary report within 3 hours. The Safety Officer will submit a report in prescribed format to the Labour Department and the SOR within 7 days of an accident. The HSE Manager will submit a Comprehensive Accident Investigation Report within 7 days of an accident.Loss T

52、ime Injury The Project Manager/ Safety, Health & Environmental Manager / Safety Officer / will be informed as soon as practicable. The HSE Manager will submit a Comprehensive Accident Investigation Report to the SOR within 7 days of an accident.Serious Property Damage / Significant Near Miss The Pro

53、ject Manager / Safety, Health & Environmental Manager / SOR will be informed as soon as practicable. The Safety Officer will submit a Comprehensive Accident Investigation Report within 7 days of an accident.Dangerous Occurrence The Project Manager / Safety, Health & Environmental Manager / SOR will

54、be informed as soon as practicable. The Safety Officer will submit a report in prescribed format within 24 hours. The Safety Officer will submit a Comprehensive Accident Investigation Report within 7 days of the incident.10.3 Consents and Permits 8.3.1 Emergency contact should be informed to all sta

55、ff before the work as stated in HSE Plan. The contact numbers of the ERT (Emergency Response Team) are posted at vicinity on site and site offices and main rest areas. Key contact numbers are:NameContact NumberConstruction Manager & HSE ManagerFirst AiderNurseAmbulance / Fire Station / Police 9 9 9*Stay calm. Inform the person you have contacted the location and the nature of the emergency. Supervisors are responsible for their respective employees. A person not