沿海地区大孔径钻孔灌注桩施工孔壁稳定性数值模拟研究  

Numerical simulation study on the hole-wall stability of large diameter bored piles in coastal areas

作　　者：张嘉鑫[1] 贺可强[1] 丰占海 李晶 张朋[1] 

机构地区：[1]青岛理工大学山东省地质环境与效应工程技术研究中心,山东青岛266033 [2]中国石油工程建设公司华东环境岩土工程分公司,山东青岛266072

出　　处：《工程建设》2016年第5期1-9,共9页Engineering Construction

基　　金：国家自然科学基金项目(41372297);高等学校博士学科点专项科研基金项目(20113721110002);蓝色经济区工程建设与安全协调中心项目

摘　　要：在我国东南沿海地区其复杂富水软土地基非常普遍,在该类区域钻孔灌注桩在施工成孔时经常发生孔壁失稳塌孔问题。为了深入分析和研究不同施工工艺与条件对钻孔灌注桩孔壁稳定性的影响规律,以不动广东石化某灌注桩工程为例,运用FLAC3D数值仿真模拟软件,对不同地下水埋深、稳定液比重、钻孔直径条件下的钻孔孔壁的变形规律进行了一系列的数值模拟研究与评价。In the southeast coastal areas of China, the complex water-enriched soft soil foundation is very common, the problems of hole wall stability loss and collapse often occur during construction and boring of the cast-inplace piles in these areas. In order to analyze and study the influence rules of different construction processes and conditions on the hole-wall stability of the bored pile, taking a bored pile project of Guangdong petrochemical company as an example and using the numerical simulation software FLAC3D, a series of numerical simulation researches and evaluations for bored hole wall deformation law under conditions of different groundwater depth, specific gravity of stable liquid and drilling （borehole） diameter were conducted.

关 键 词：钻孔灌注桩 孔壁稳定性 FLAC3D模拟 施工 

分 类 号：TU473.1[建筑科学—结构工程]