CONTENTS
- Scope of Work
- Definitions
- References
- Subcontractors
- Materials
- Plant & Equipment
- Safety
- Prior Activities
- Procedure
- Responsibilities
- Attachments
1. Scope:
| 1.1 | This Method Statement covers the various steps in Site Survey Works. |
2. Definitions:
| 2.1 | MS: STM Method Statement : Surveying Work |
| 2.2 | ITR Inspection and Test Request |
| 2.3 | PPS Particular Project Specification |
| 2.4 | GPS General Project Specification |
| 2.5 | UG Underground |
| 2.6 | TPS Technical Project Specification |
3. References:
| 3.1 | GPS Section100, Clause 100.6 Surveying instruments. |
| 3.2 | GPS Section102: Clause 102.20 Surface Levels |
| 3.2 | GPS Section200: Clause 200.1 Particular Earthworks Requirement. |
4. Subcontractors:
| N/A |
5. Products:
| 5.1 | None (No Permanent Materials) |
6. Tools & Equipments:
| 6.1 | Survey Equipment – Total Station, Theodolite |
| 6.2 | Tripods |
| 6.3 | Ranging Poles, Ranging Rods |
| 6.4 | Measuring tapes, spirit levels, plumb lines |
7. Safety
| 7.1 | TPS Section : Site Safety and Security |
| 7.2 | CSM Construction Safety Manual |
| 7.3 | Safety Hazards and Precautions |
| a. | Traffic :- Set out warning signs, plastic glass range flagging and/or barricades as necessary. |
| b. | Electrical Lines :- Use only wood or fiber glass range poles or rods when working near electrical lines. |
| c. | Surveyors & chainmen to wear reflective jackets. |
| d. | All instruments, tripods, carrying cases, surveying tools, will be fitted with stripes of highly reflective adhesive tape. |
8. Prior Activities:
| 8.1 | Establishing the control point consists of scouting existing reference points on site which are already referenced to existing control points defined and indicated by the Engineer |
| 8.2 | The control points will be protected by concrete surround and by warning tape to secure the perimeter. |
| 8.3 | Regular monthly checks on the control points will be carried out as part of the QA procedures. |
| 8.4 | Location of bench marks are checked jointly with the Consultant surveyors and levels in the drawings are verified accordingly. |
| 8.5 | Review and submit to the Consultant the calibration records for survey instruments to be used in the work |
9. Procedure:
| 9.1 | Before proceeding with survey works all survey equipments to be used will be calibrated and the calibration certificates will be submitted to the Consultant. |
| Note: | This activity is a Hold Point. |
| 9.2 | For ease of reference in daily activities temporary bench marks are established and protected on site. A duly signed layout drawing showing the location and co-ordinates, will be submitted to the Engineer for future records. |
| 9.3 | At the beginning, setting out of lines will be carried out to check all possible obstructions prior to commencement of construction. Ground levels are also recorded and records will be jointly signed with the Consultant for future reference. |
| Note: | Those G.L. records shall form the basis for Contract’s Measurements. |
| 9.4 | The setting out for the Main Secondary Turning points will be carried out by OAJ JV surveyors then it will be checked by the Engineer’s Surveyors. A traverse drawing showing the actual location and coordinates of the T.P’s (where applicable), as well as the offsets from permanent services will be produced and duly signed by both parties. |
| Note: | This traverse drawing will be the reference for all future setting out activities. |
| 9.5 | Shop Drawings will then be prepared and submitted to the Engineer for agreement and approval. |
| Note: | The Shop drawings will be the basis for all the construction activities. Any amendments must be recorded and monitored. Care should be taken to only use the latest revision during execution. |
| 9.6 | For every particular item of work such as pipeline excavation, laying, leveling, manhole location setting out, invert level, stubs level, cover level…etc. survey checking out is a must to eliminate any possible discrepancy. |
| 9.7 | Surveying during the execution will be carried out by qualified surveyors along with experienced chainmen. |
| 9.8 | Latest versions of survey instruments are used such as Total Station, Digital Theodolite and highly accurate level instruments. In addition to the various accessories such as Ranging Rods, Measuring Tapes, Ranging Poles, Tripods…etc. all survey equipment will be calibrated as mentioned in section 9.1 above. |
| 9.9 | In the cases of pipelines and associated structure every step will be checked. |
| 9.10 | Surveying records will be kept up to date as they will form the basis for payment, measurements sheets and as-built records of the works done on site. |
| 9.11 | Any changes will have to be shown on the final drawings. |
10. Responsibilities:
| 10.1 | It is the Project Manager’s duty to ensure that all necessary safety and protective equipment are provided along with properly trained and qualified personnel. |
| 10.2 | It is the Site Supervisor’s duty to organize the work in safe manner and to ensure that safety and protective equipment are being properly utilized. |
| He must also assure the method statement procedure is followed and must observe any hold-points and notify the Consultants for inspection. | |
| 10.3 | It is the worker’s duty to properly wear the protective equipment provided and obey all safety rules. They must also perform the work as described in the method statement procedure. |
| 10.4 | The Contract Manager will coordinate with Safety Engineer and ensure that the necessary resources to implement the approved method statement have been allocated to the task. |
| 10.5 | The Site Engineer will ensure that the site preparation activities are conducted according to the approved method statement. |
| 10.7 | The Material Engineer will ensure that the materials being used are in accordance to the project specifications and the approved method statement. |
