夯实水泥土桩复合地基的应用和承载力分析  

Application and Bearing Capacity Analysis of Rammed Cement-soil Pile Compound Foundation

作　　者：高笑娟[1] 李跃辉[1] 马建军[1] 杨晓斌 

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023 [2]洛阳市建工桩基检测有限公司,河南洛阳471000

出　　处：《河南科技大学学报（自然科学版）》2015年第5期62-67,8,共6页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51474095);河南省教育厅重点基金项目(14A410003)

摘　　要：为了研究单桩承载力对复合地基承载力的影响,在洛阳地区某具有湿陷性的黄土地基中进行了相关的静载荷试验。试验结果显示:当单桩承载力低于要求值时,复合地基的承载力也可能满足设计要求。说明复合地基承载力不仅受单桩承载力的影响,而且与桩周土层的性质密切相关。在静载荷试验的基础上,利用有限元方法分析了复合地基承载力的影响因素。分析结果表明:复合地基承载力受桩周土层参数影响较大,受桩身水泥土强度影响较小。因此,利用经验公式对复合地基承载力计算时,可以适当降低对单桩承载力的要求而提高对桩周土层参数的要求。To study the influence of single pile bearing capacity on compound foundation,the relevant static load tests were carried out in collapsible loess at Luoyang. The results show that the bearing capacity of compound foundation may meet the requirement when the single pile is lower than the requirement value. So the bearing capacity of compound foundation is influenced not only by the single pile but also by soil parameters. Based on the results of static load tests,the bearing capacity influence factors of compound foundation were analyzed by finite element method. The results show that the bearing capacity of compound foundation is influenced more by the soil strength parameters than that of soil-cement strength. So the requirement of single pile bearing capacity is reduced and the influence of soil strength parameters is increased when the compound foundation bearing capacity is calculated with empirical formula.

关 键 词：夯实水泥土桩 复合地基 湿陷性黄土 承载力 水泥土强度 

分 类 号：TU443[建筑科学—岩土工程]