You have been advised by the Contract Administrator for a given CITY contract that the Foundation subcontractor has not been able to drive the piles to achieve the ultimate capacity specified on the Contract Drawings. The foundation design consists of steel HP 310x110 piles driven to refusal on a glacial till deposit that is overlain by a stratum of silty clay. The design embedment length is 20 m. You are told that the Contract Documents specify that the ultimate capacity of 3200 kN is to be verified using the Pile Driver Analyzer (PDA). The design was undertaken by a Prime Service Provider. The FIDR was produced by a RAQS qualified Foundation Engineering subconsultant and the report had been reviewed by you during the detailed design of the bridge. Please describe how you would solve the problem. In your response identify: 1. How you would administer the solution to the problem and specifically who should be involved in the resolution of the problem. 2. Possible causes of not achieving capacity. 3. Alternatives to solve the problem.
You have been advised by the Contract Administrator for a given CITY contract that the
Foundation subcontractor has not been able to drive the piles to achieve the ultimate
capacity specified on the Contract Drawings. The foundation design consists of steel
HP 310x110 piles driven to refusal on a glacial till deposit that is overlain by a stratum of
silty clay. The design embedment length is 20 m. You are told that the Contract
Documents specify that the ultimate capacity of 3200 kN is to be verified using the Pile
Driver Analyzer (PDA).
The design was undertaken by a Prime Service Provider. The FIDR was produced by a
RAQS qualified Foundation Engineering subconsultant and the report had been
reviewed by you during the detailed design of the bridge.
Please describe how you would solve the problem. In your response identify:
1. How you would administer the solution to the problem and specifically who
should be involved in the resolution of the problem.
2. Possible causes of not achieving capacity.
3. Alternatives to solve the problem.
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