嵌岩桩承载力影响因素数值分析  

Numerical analysis of rock socketed pile

作　　者：刘会球 LIU Huiqiu(China Railway 25 Bureau Group 3 Engineering Co.Ltd,Changsha 410001,China)

机构地区：[1]中铁二十五局集团第三工程有限公司,湖南长沙410001

出　　处：《铁道科学与工程学报》2018年第10期2535-2540,共6页Journal of Railway Science and Engineering

摘　　要：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.

关 键 词：嵌岩桩 溶洞直径 顶板厚度 嵌岩深度 FLAC3D 

分 类 号：TU446[建筑科学—岩土工程]