混凝土桩与石灰桩多元复合地基室内模型试验研究  

Investigation of Laboratory Experiment of Multielement Composite Foundation on Concrete Column and Lime Column

作　　者：王仙芝[1,2] 郑俊杰[1,2] 王龙飞[3] 赵建斌[1,2] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430074 [2]华中科技大学控制结构湖北省重点实验室,武汉430074 [3]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《武汉理工大学学报（交通科学与工程版）》2008年第5期838-841,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目资助(批准号:50478090)

摘　　要：通过改变设计参数,对混凝土桩与石灰桩多元复合地基进行一系列室内模型试验,得到混凝土桩与石灰桩多元复合地基的荷载沉降曲线特征,混凝土桩、石灰桩和桩间土的应力特点,桩土应力比特点.该模型虽然不能完全模拟现场混凝土桩与石灰桩多元复合地基的工作性状,但从定性上分析混凝土桩与石灰桩多元复合地基的工作性状是可行的.试验表明,对于粉细砂类土,混凝土桩与石灰桩联合处理的效果很好.A set of apparatus of foundation physical model has been developed and utilized to conduct model tests of multielement composite foundation on concrete column and lime column. By changing design parameters（strength of concrete column and replacement ratio of lime column）, a number of features of multielement composite foundation on concrete column and lime column have been obtained,including the characteristics of load - settlement curves , stress of the columns , stress between columns , column-soil stress ratio,and load-sharing ratio of column and soil. Although the laboratory tests cannot precisely describe the characteristics of multielement composite foundation on concrete column and lime column,they reveal the mechanism of multielement composite foundation on concrete column and lime column qualitatively. It is concluded that multielement composite foundation on concrete column and lime column contributes very greatly for improving the silty fine sand.

关 键 词：混凝土桩 石灰桩 多元复合地基 模型试验 桩土应力比 

分 类 号：TU473[建筑科学—结构工程]