Quality Control of Piling

Quality Control of Piling Nominate the supplier of pile Submit Method Statement for piling including: a) Sets calculation for driven piles b) Details of equipments c) Welder personnel qualifications d) Details of Static load test procedures e) Details of Pile Driving Analysis Test (PDA)

Submit pile catalogue and mill certificate Additional details required for micropile: a) Tensile test report for API pipe b) Water test report c) Four corner pile drill record d) Grout material design mix e) Grout trial mix f) Test cube

Additional details required for bored pile a) Mill certificate/tensile test for rebar b) Four corner bored pile record c) Concrete design mix d) Concrete trial mix

•Consultant comment

•Details requirement: •a) SSRW 10.8.2.1 •b) •c) Consultant comment •d) SSRW 10.8.2.2 •e) SSRW 10.8.2.2 •f) SSRW 10.8.4.2

•Details requirement: •a) SSRW 10.5.2.1 •b) Consultant comment •c) SSRW 10.5.2.1 •d) SSRW 10.5.2.1 •e) SSRW 10.5.5.2

e) Test cube and Slumpt Test

Pile Driving Analysis Test (PDA)

Static lad test

•Consultant comment

•Details requirement : •SSRW 10.11.7

Submit piling records

As-built pile positions

•Details requirement : •75 mm tolerances

PILING 1

2

• Study the drawings on the type of piles used, jointing details, details of pile shoe, starter bar details into pile cap. •RC pile or Spun pile, ensure to have a copy of catalogue on the approved size and class. •Piles delivered to site, check for visual cracks either longitudinally or cross-sectional. •The 28 days compressive cube strength must be attained before any actual piling works. •Piling method statement submitted by contractor with set calculation for consultant's approval.

3

•Micro piles or bored piles, piling method statement submitted by contractor. •Cutting of sample of API pipes must be witnessed by site staff or rebar delivered to site and make marking on the sample. •Tensile testing of the API pipe or rebar sample on its yield stress. •All testing and recorded results send to consultant for approval.

4

•Test pile shall be continuously monitored with a Pile Driving Analysis (PDA) throughout the entire driving process. •Follow strictly the construction drawing. •The PDA test will indicate any crack occurs at the pile or joint, overstress in the pile as well as pile capacity. •The PDA report shall submit to consultant approval priors to Static Load Test.

5

•Static Load Test method statement submitted by contractor. •Photographs are taken of the overall view, setting out and record all details by using Static Load Test Checklist.

6

•Issue memorandum to inform the contractor of the pile combination to minimize wasteage. •Site staff shall use relevant piling record form.

7

•After all piles have been driven, instruct the contractor to cut piles to cut-off levels and survey the as-built pile position in Northing and Easting. •The contractor shall submit as-built pile position for consultant's approval priors to construction of pile cap.