刚性桩复合地基承载力计算问题的探讨  

Discussion on Bearing Capacity Calculation of Rigid Pile Composite Foundation

作　　者：杨光华[1,2,3,4] 刘清华 孙树楷 姜燕 贾恺[2,3,4] YANG Guanghua;LIU Qinghua;SUN Shukai;JIANG Yan;JIA Kai(Department of Civil Engineering,South China University of Technology,Guangzhou 510640,China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;The Geotechnical Engineering Technology Center of Guangdong Province,Guangzhou 510635,China;Guangdong Emergency Technology Research Center of Mountain Torrents Disasters,Guangzhou 510635,China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510640 [2]广东省水利水电科学研究院,广东广州510635 [3]广东省岩土工程技术研究中心,广东广州510635 [4]广东省山洪灾害突发事件应急技术研究中心,广东广州510635

出　　处：《广东水利水电》2019年第12期1-7,共7页Guangdong Water Resources and Hydropower

基　　金：国家自然科学基金项目(51778152,51378131)

摘　　要：刚性桩复合地基的应用越来越广泛,但对于刚性桩复合地基的承载力如何合理确定,沉降如何合理计算,尤其是对于一些特殊地质条件下,更是存在值得研究的问题。针对目前规范方法计算刚性桩复合地基承载力中存在的一些问题,如天然硬土地基深宽修正后承载力可能大于复合地基承载力、分层地基桩间土承载力取值等问题,提出通过桩土变形协调获得复合地基的荷载沉降p^s曲线,由复合地基的荷载沉降曲线,依据强度安全和变形控制的方法确定复合地基承载力的方法,可以更好的解决复合地基承载力的问题。文中通过案例分析进行了证明,以供参考。Rigid pile composite foundation is more and more widely used,and it is worth studying the problem that how to reasonably determine the bearing capacity of rigid pile composite foundation and calculating settlement,especially in some special geological conditions.There exist some problems in calculating the bearing capacity of rigid pile composite foundation by the current standard method,such as the problems that bearing capacity of hard soil foundation is larger than that of composite foundation after the depth and width modification,and the bearing capacity of soil between piles of layered foundation is also unclear.To solve the problem,the p-s curve of composite foundation can be obtained based on the principle of deformation coordination between pile and soil.According to the p-s curve of composite foundation,it is easy to determine the bearing capacity of composite foundation based on strength safety and deformation control.This method can better solve the problem in determining bearing capacity of composite foundation.It has been proved by case analysis in this paper for reference.

关 键 词：刚性桩 复合地基 承载力 变形协调 沉降控制 

分 类 号：TU470[建筑科学—结构工程]