CFG桩土复合地基条件下倾斜桩支护基坑工作特性研究  

Research on working characteristics of tilting pile supporting foundation pit under CFG pile-soil composite foundation

作　　者：周德志 Zhou Dezhi(China Water&Power International Corporation,Beijing 101100,China)

机构地区：[1]中国水利电力对外有限公司,北京101100

出　　处：《吉林水利》2023年第7期24-30,共7页Jilin Water Resources

摘　　要：倾斜支护桩已在工程实践中证明了其拥有良好的工作特性。然而,坑底软土地基加固对倾斜桩支护基坑的工作特性的影响目前鲜有研究。通过数值模拟研究了倾斜支护桩在CFG桩土复合地基条件下的工作特性,分析CFG桩桩长、倾斜支护桩的倾斜角度对支护桩工作特性的影响。试验结果表明:针对常规倾斜角度(≤20°),在试验所在的CFG桩桩长范围内,倾斜角度越大,支护桩总体工作特性越好;CFG桩桩长在一定范围内,桩长越长越有利于倾斜桩的支护效果,但超过某一限度可能会起反向效果。Inclined supporting piles have been proved to have good working characteristics in engineering practice.However,the influence of soft soil foundation reinforcement on the working characteristics of inclined pile supporting foundation pit is seldom studied at present.The working characteristics of CFG pile-soil composite foundation are studied by numerical simulation,and the effects of CFG pile length and tilt Angle on the working characteristics of the supporting pile are analyzed.The test results show that:For the conventional tilt Angle(≤20°),in the long range of CFG pile where the test is located,the greater the tilt Angle,the better the overall working characteristics of the supporting pile;CFG pile length within a certain range,the longer the pile length,the more beneficial to the support effect of inclined piles,but beyond a certain limit may have a reverse effect.

关 键 词：基坑 倾斜支护桩 CFG桩 数值分析 

分 类 号：TV551.4[水利工程—水利水电工程]