土工格室+碎石桩复合地基承载机理及其试验研究  

Study on the Capacity Mechanism and Model Test of Geogrid Mattress and Gravel Pile Composite Foundation

作　　者：赵明华[1] 杨明辉[1] 吴亚中 陈艳平[1] 

机构地区：[1]湖南大学岩土工程研究所,湖南长沙410082 [2]湖南省交通厅,湖南长沙410011

出　　处：《公路交通科技》2005年第11期6-9,29,共5页Journal of Highway and Transportation Research and Development

基　　金：教育部高等学校博士学科点专项基金资助(20020532008)

摘　　要：首先利用相似理论的方法,设计完成了单纯软基、土工格室垫层加固软基、土工格室+碎石桩复合地基室内3组对比模型试验。在此基础上,根据荷载-沉降曲线、桩土应力比以及孔隙水压力的试验数据对比,系统分析了土工格室+碎石桩复合地基的承载性状及作用机理,最后结合土工格室的受力特点,提出该类复合地基承载力计算公式。Using the similarity method, a large-scale test including weak subgrade, gravel pile composite foundation and geogrid mattress ＋ gravel pile composite foundation is completed in the paper.Then based on the load-settlement curve, pile-soil stress and pore water pressure of the test, capacity mechanism is analyzed, the mechanisms of improving load capacity, reducing settlement and asymmetry settlement, the mechanism of interaction between geogrid mattress and gravel pile composite foundation are discussed.Finally, combined with the mechanical character, the capacity computational formula is deduced.

关 键 词：相似理论 土工格室 碎石桩复合地基 承载力计算 

分 类 号：TU472.3[建筑科学—结构工程]