嵌岩桩的极限端阻力发挥特性及其端阻力系数

嵌岩桩极限端阻力发挥特征及端阻力系数取值是岩土工程中嵌岩桩应用的重要研究课题之一。收集整理了不同地区学者在不同时期、不同岩石性质和不同嵌岩条件下开展的165个嵌岩桩端阻力试验成果，主要包括嵌岩段岩石类型及其天然单轴抗压强度、嵌岩直径与嵌岩深度、嵌岩桩极限端阻力等。定义嵌岩桩极限端阻力与岩石天然单轴抗压强度的比值为嵌岩桩端阻力系数，分析了桩径、嵌岩深度、嵌岩深径比和岩石强度对嵌岩桩极限端阻力和端阻力系数的影响规律，建立了嵌岩桩极限端阻力及端阻力系数与岩石单轴抗压强度之间的拟合关系式。

Statistical analysis on end-bearing capacity and resistance factor for rock-socketed piles

It is of great importance to investigate the characteristics of end-bearing capacity and to determine the resistance factor for rock-socketed piles. In this study, based on the results of 165 compression load tests several key issues with regard to the end-bearing capacity behavior of rock-socket piles were examined. These load tests were conducted on different rocks with different rock-socketed pile conditions throughout the world. The influential factors include the type and the uniaxial natural compressive strength of rocks, the diameter and the embedment depth of socketed piles, and the ultimate end-bearing resistances. In this study, the ratio of ultimate end-bearing capacity to the unconfined compressive strength of the rock was defined as the end-bearing resistance factor of rock-socketed pile. Effects of the key factors on the ultimate end-bearing capacity and the end-bearing resistance factor were comprehensively investigated. An empirical equation between the unconfined compressive strength.