| 基于有限元计算的岩溶区CFG桩复合地基分析 |
| |
| 引用本文： | 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. |
| |
| 作者姓名： | 叶观宝 孟明辉 邢皓枫 |
| |
| 作者单位： | 1. 同济大学岩土及地下工程教育部重点实验室, 上海 200092; |
| |
| 基金项目： | 上海市重点学科建设项目(B308) |
| |
| 摘 要： | 分析了岩溶区复合地基的形成机理，并采用Plaxis有限元软件对岩溶区CFG桩复合地基的加固机理进行了研究，同时结合相关资料对岩溶区CFG桩复合地基在应用中存在的一些问题进行了探讨，得出的主要结论有:岩溶区CFG桩复合地基具有较高的承载力和有效控制沉降的能力；支承于基岩面的桩体属于摩擦端承桩或端承桩，倾斜基岩面对单桩承载力具有较大影响，建议在条件允许的情况下按照摩擦桩进行单桩承载力计算；岩溶区上覆土层土性变化大，地基处理规范中第9.2.5条CFG桩复合地基承载力的设计计算公式尚值得商榷，且规范中第9.2.8条加固区复合土层压缩模量计算公式亦值得商榷，建议采用桩长范围内土层承载力特征值的加权平均值fsk计算复合地基承载力fspk。
|
| 关 键 词： | 岩溶 复合地基 CFG桩 有限元 |
| 收稿时间： | 2010-05-26 |
Composite foundation problems in karst area based on finite element calculation |
| |
| YE Guanbao,MENG Minghui,XING Haofeng.Composite foundation problems in karst area based on finite element calculation[J].Coal Geology & Exploration,2011,39(3):44. |
| |
| Authors: | YE Guanbao MENG Minghui XING Haofeng |
| |
| Institution: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China |
| |
| 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 sur... |
| |
| Keywords: | karst composite foundation CFG pile finite element |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《煤田地质与勘探》浏览原始摘要信息 |
| 点击此处可从《煤田地质与勘探》下载免费的PDF全文 |
