煤田地质与勘探2011，Vol.39Issue(3)：44-48,51,6.DOI:10.3969/j.issn.1001-1986.2011.03.009
基于有限元计算的岩溶区CFG桩复合地基分析
Composite foundation problems in karst area based on finite element calculation
摘要
Abstract
This paper analyzes the formation mechanism of composite foundation in the karst area, at the same time studies the strengthening mechanism of the CFG pile composite foundation by using the finite element software Plaxis, and discusses some problems in the application of CFG pile composite foundation by integrating correla-tive data, the main conclusions are: the CFG pile composite foundation in karst area has higher capacity and ability to effectively control the settlement; the pile bearing on the bedrock surface belongs to frictional end-bearing pile or end-bearing pile, so inclined rock face has significant impact on the bearing capacity of single pile, a suggestion that the calculation of single pile bearing capacity should be according to friction pile under permissive condition; the property of the overlaying soil changes greatly in karst area, the article 9.2.5 about the bearing capacity calcu-lation of the CFG pile composite foundation in the Technical Code for Ground Treatment of Buildings is worth dis-cussing, and so is the article 9.2.8 about the calculation of the composite layer compression modulus, it was sug-gested to use the weighted average fsk of subgrade bearing capacity characteristic value withing the range of pile length to calculate the bearing capacity of composite foundation fspk.关键词
岩溶；复合地基；CFG桩；有限元Key words
karst/ composite foundation/ CFG pile/ finite element分类
建筑与水利引用本文复制引用
叶观宝,孟明辉,邢皓枫..基于有限元计算的岩溶区CFG桩复合地基分析[J].煤田地质与勘探,2011,39(3):44-48,51,6.基金项目
上海市重点学科建设项目(B308) （B308）
