成层地基中静压桩挤土效应模型试验研究  被引量:17

Model Test Research of Compacting Effect of Jacked Pile in Layered Ground

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作  者:张述涛[1] 李镜培[1] 李雨浓[1] 

机构地区:[1]同济大学岩土与地下工程教育部重点实验室,上海200092

出  处:《地下空间与工程学报》2009年第A02期1557-1561,共5页Chinese Journal of Underground Space and Engineering

摘  要:本模型试验用改装的手摇式静力触探仪做为压桩设备,分别在均质地基和双层地基中连续贯入模型桩,用数码相机拍摄压桩过程,最后用图像处理软件处理所获得的图片,得到压桩结束后桩侧土体横向位移和竖向位移,比较分析均质地基和双层地基的最终土体位移场,得出静压桩在双层地基中,由于软硬土层间的相互作用,所产生不同于均质地基情况下的土体变形规律。With the modified CLD -3 static penetrometer as a loading equipment, in this model test a model pile is pressed into homogeneous ground and double - layered ground, then the pictures of the process of pressing pile with a digital camera are taken and finally the radial and vertical displacement of soil around the pile is obtained using a image processing software. By comparing and analyzing the final displacement field of homogenous ground and double -layered ground, we can study the law of soil displacements in double -layered ground, which is different from that in homogeneous ground because of the interaction between hard layer and soft layer.

关 键 词:模型试验 静压桩 成层地基 挤土效应 

分 类 号:TU413[建筑科学—岩土工程]

 

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