Axial compressive capacity estimations determined from pile load tests (PLTs) are compared with theoretical methods for 13 rock-socketed cast-in-situ concrete piles constructed for different projects in Pakistan. Rock strata encountered at the project sites were mostly shale, siltstone, and sandstone. Rock quality designation (RQD) values fall within 20% to 50%, indicating that the rock mass is in fair to good condition, whereas the rock mass rating system yields a classification of poor to fair. The unconfined compressive strength of the rock cores ranges from 1.5 to 18 MPa. The PLT results show the axial compressive capacities are within 2 and 6 MPa. Axial compressive capacities were also calculated using theoretical methods. An equation is presented to determine the relationship between ultimate capacity and RQD using multiple linear regression analyses. The findings provide useful guidelines for selecting suitable and economical methods for the axial compressive capacities of rock-socketed cast-in-situ concrete piles.

通过桩荷载试验 (PLT) 确定的轴向抗压能力估计值与为巴基斯坦不同项目建造的 13 个嵌岩现浇混凝土桩的理论方法进行了比较。项目现场遇到的岩层主要为页岩、粉砂岩和砂岩。岩石质量指定 (RQD) 值在 20% 到 50% 之间，表明岩体处于一般到良好的状态，而岩体评级系统产生从较差到一般的分类。岩心的无侧限抗压强度范围为 1.5 至 18 MPa。PLT 结果显示轴向压缩容量在 2 和 6 MPa 之间。轴向压缩能力也使用理论方法计算。使用多元线性回归分析，提供了一个方程式来确定极限容量和 RQD 之间的关系。研究结果为选择合适且经济的方法来确定嵌岩现浇混凝土桩的轴向抗压能力提供了有用的指导。