Abstract：Abstract：Research purposes：The rotary penetration test (RPT) is a new technology of in-situ tests. The aim of the research is to explore the application on the design of bored cast-in-situ pile with the rotary penetration test, of which the method design, the equipment development and the field test of RPT have been completed. Through the comparative analysis between the results of RPT and the internal force test of pile, the estimation of ultimate bearing capacity of bored cast-in-situ pile by RPT is studied.
Research conclusions：In this paper, one parameter——the specific energy of RPT is defined and used in the following comparative analysis. The calculation method of the ultimate bearing capacity of bored cast-in-situ pile is presented and corrected through the comparative analysis between the results of RPT and the internal force test of pile. The project example proves that the calculation method could efficiently calculate the ultimate bearing capacity of bored cast-in-situ pile.The research results can give reference for pile foundation design, at the same time have guidance and reference for application of RPT new technology in geotechnical engineering.
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