大直径嵌岩基桩极限承载力判定的对比研究OA北大核心CSTPCD

For estimating the ultimate bearing capacity of large-diameter rock-socketed pile foundation(LDRSPF),the vertical static load test method for pile foundations and pile foundation bearing capacity theories and universal function analysis method were used to construct the potential energy function specific energy function of rock-socketed pile(RSP),and the specific energy comparison method(SECM)for determining the ultimate bearing capacity of RSP was proposed,that is,RSP reached the ultimate bearing state when the stress at the end of the pile exceeds the ultimate shear strength of the rock mass around the rock-socketed section.The results show that a positive correlation is between the ultimate bearing capacity of RSP and both the socketed depth-to-diameter ratio and the strength of the rock mass,and the ultimate bearing capacity of RSP may be objectively determined by the objectivity of SECM for determining.The research conclusion provides a new method for the ultimate bearing capacity of LDRSPF.