ABSTRACT

It is essential that pile and hammer instrumenta­ tion be used to evaluate pile acceptance for large diameter driven piles, especially should refusal occur or if easier driving than predicted is encountered. Pile instrumentation can also be used to evaluate acceptance o f cast in situ piles. Pile acceptance at refusal is based on: • the static pile capacity computations per­

formed using soil parameters obtained from a high quality geotechnical investigation,

• the soil resistance to driving obtained from a CAPWAP analysis,

• the soil resistance to driving obtained from the Case-Goble formulation, and

• the soil resistance to driving determined from wave equation results obtained using the measured driving system performance data and the field blow count.