INFORMACIÓN SOBRE
PRONTUARIO TELEFÓNICO
1. Stake mark for start of road slope side cutting
A. Stake mark for end of Side Cutting under design subgrade B. Stake mark for start of first slope of side cutting.
C. Stake mark for end of first slope of side cutting. D. Stake mark for start of second slope transition. E. Stake mark for end of second slope side cutting.
B. Laying out of Stake Marks shall be done on a 25-m interval along the proposed roadway to avoid over-cutting as shown below:
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C. Wooden Stake shall be used with appropriate marking showing the intended elevations to be cut or filled along the roadway cross-section on a 25m interval.
7.4. TRAVERSING
7.4.1. General
A GPS Total Station shall be used to traverse the entire road networks. The same instrument and/or the theodolite will be employed for Staking and Grading, Road Stationing, Vertical and Horizontal Traverse.
7.4.2. GPS Total Station Traversing
a. The surveyor shall locate the Municipality Bench Mark at the nearest location to the project site, this BM shall be ensured to be correct and updated.
b. Coordinates shall be fed to the Total Station from the approved Working Coordinates Plan.
c. The surveyor shall start and position his instrument at the Benchmark and feed to the instrument the known BM’s coordinate and elevation.
d. The surveyor can now conveniently locate and establish the control points for future references.
e. After establishing the control points, the surveyor may now start to run the required surveying works such as Staking and Grading, Road Stationing, Road Center Line Setting Out and Line Marking.
7.5. AS-BUILT SURVEY
a. As-Built Survey will be conducted as soon as substantial work has been completed. b. Results of the As-built Survey will then be correlated with the proposed or planned
coordinates noting any variance or if results is within acceptable limits i.e. coordinates deviation from plan to actual.
c. If results is beyond acceptable limits, necessary corrective action shall be made to address the concern. All Subsequent work maybe stop as per instruction by the Engineer until corrective actions has been rectified.
d. Results of the Survey shall be kept, tagged, and properly bounded in binder folder.
7.6. SURVEY EQUIPMENT TOLERANCES
The Equipment Accuracy for Survey Equipment will be maintained as per Project Specifications.
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8. QUALITY:
DESCRIPTION OF WORK IN-CHARGE
The QA/QC Manager will monitor and ensure that this Method Statement shall be strictly enforced so that smooth Work Flow will be attained. 8.1.In general, our team of Surveyors, Project/Site Engineers and Foremen
together with QC Inspectors will ensure that the approved Method statement is being followed and inspections are taking place. In particular, the following shall be taken care of:
8.1.1 Survey equipment/instruments used on site are calibrated. The original Calibration certificates are always kept in store and copies of same are available along with the instrument.
8.1.2 The Surveyors carry out periodical checks to the tolerances of the manufacturer and maintain the relevant records.
8.1.3 Any defective or damaged surveying equipment is properly identified and immediately removed from site.
8.1.4 All Control Points are clearly marked and located on elements which are not likely to be disturbed by impact, vibration,
settlement or heave and are checked periodically by the Surveyor. 8.1.5 Regular checking is carried out and its record maintained
throughout the construction progress.
8.2 All the measuring and test equipment shall be controlled, calibrated and maintained at site. The equipment shall be used in a manner, which ensures that equipment uncertainty is known and is consistent with the required capability.
8.3 Site surveying and related equipment will be checked and kept within calibration to the Tolerances as recommended by the manufacturer of the equipment and accepted Engineering/ construction practice. 8.4 Re-calibration and checking must take place not only as scheduled but
also at any time when there is any doubt about the integrity and accuracy of the equipment during its use on the site
8.5 When an error in an instrument is evident, the Surveyor may: Adjust the instrument on site in accordance with the instructions
provided by the instrument manufacturer (only if the Surveyor/Engineer is competent, having adequate experience to take such action) or request the Project Manager to send the instrument to the local agent for
recalibration.
QA/QC Manager
SU, SE, QA/QCI, ST
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9. SAFETY:
DESCRIPTION OF WORK IN-CHARGE
The Safety Officer of the contractor and the Survey Team together with the QA/QC Team shall work together in the prevention of any work related accidents in the job site.
The following safety requirements must always be observed and adhered in the site at all times:
9.1 Safe means of access when working on excavated area will be provided & maintained.
9.2 Persons working closely to roof edges or any other high platform where the potential of falling exists will use fall protection. 9.3 Equipment close to edges will be secured so as to avoid falling
or dropping.
9.4 All other hand tools, equipment or material will be secured at all times.
SO, Survey Team, QAQC Team
SO, Survey Team, QAQC Team
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