刚性桩复合地基设计与实测研究  

EXPERIMENTAL RESEARCH ON RIGID PILE COMPOSITE FOUNDATIONS

作　　者：李希平[1] 何春保[2] 陶龙光[1] 倪光乐 陈存恩[2] 刘波[1] 

机构地区：[1]中国矿业大学力学与建筑工程学院,北京100083 [2]华南农业大学水利与土木工程学院,广东广州510642 [3]广州市泰基工程技术有限公司,广东广州510507

出　　处：《岩石力学与工程学报》2009年第A02期3850-3856,共7页Chinese Journal of Rock Mechanics and Engineering

摘　　要：桩土应力比与沉降是复合地基设计的2个重要参数,针对复合地基设计中难以考虑位移协调的情况,通过对地基基础共同作用方程进行简化,建立考虑桩土位移协调的设计分析方法,并结合广东地区3个不同类型刚性桩复合地基上建筑物在施工期间的沉降与桩土应力监测实例,得到桩土荷载分担以及沉降的变化规律。实测结果表明,所采用的地基承载力和沉降计算方法较好地反映了工程实际状况,比规范方法更加接近实际情况,研究成果可供今后类似工程设计参考。The settlement and stress ratio between pile and soil are the two most important parameters of composite foundation.But it is not easy to consider displacement coordination between piles and ground.Aiming at this problem,the equation of interaction is simplified.And three different static loading tests and in-situ measurement are carried out to analyze the load-bearing behavior and working mechanism of various types of rigid pile composite foundations in Guangdong Province.The settlement and rule of stress ratio between pile and ground are obtained.The measurement results show that proposed method coincides well with the practice condition.This method has better practical result than that of the method presented in technical code.And the results presented could be used for reference in rigid pile composite foundation design.

关 键 词：桩基工程 复合地基 桩土应力比 沉降 试验研究 

分 类 号：TU473[建筑科学—结构工程]