嵌岩桩承载力影响因素数值分析
Numerical analysis of rock socketed pile

基于韶山某铁路桥梁工程，应用FLAC3D对桥梁地基嵌岩桩进行数值模拟，研究溶洞直径、顶板厚度、嵌岩深度对嵌岩桩承载力的影响规律。研究结果表明：溶洞直径越大，嵌岩桩承载力越低；增大顶板厚度可减小嵌岩桩沉降，当顶板厚度增加至一定值则沉降减小不明显；嵌岩深度越大嵌岩桩沉降越小，当嵌岩深度达到一定值则沉降减小不明显。
This paper is based on railway bridge engineering in Shaoshan. Numerical simulation of rock-socketed pile is carried out by FLAC3D. Analyzing the influence of the diameter of the karst cave, thickness of the roof, the depth of rock-socketed. Research found that the larger the diameter of the cave, the larger the settlement of rock-socketed pile. Increasing roof thickness can reduce the settlement of rock-socketed pile, and when the roof thickness increases to a certain value, the settlement is less obvious. The larger the rock-socketed depth, the smaller the settlement of the rock-socketed pile, and the settlement reduction is not obvious when the rock-socketed depth reaches a certain value