黏性土中扩展基础基底压力分布规律的模型试验  

Experimental Study on Contact Pressure Distribution of Spread Foundation on Clay Ground

作　　者：梁发云[1] 王杰 梁轩 李元齐[2] 王文广 LIANG Fayun;WANG Jie;LIANG Xuan;LI Yuanqi;WANG Wenguang(Department of Geoteehnieal Engineering,Tongji University,Shanghai 200092,China;Department of Structural Engineering,Tongji University,Shanghai 200092,China;State Grid Sichuan Economic Research Institute,Chengdu 610041,China)

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学建筑工程系,上海200092 [3]国网四川省电力公司经济技术研究院,成都610041

出　　处：《结构工程师》2018年第3期158-164,共7页Structural Engineers

基　　金：国家电网科技项目资助(52199915002M)

摘　　要：目前扩展基础基底压力分布的研究很少涉及黏土地基及偏心加载条件。通过黏土地基上不同宽高比扩展基础轴压、偏压室内大型模型试验,指出轴压作用下小宽高比刚性扩展基础基底压力分布总体较均匀,但中间部位较小,大宽高比柔性扩展基础基底压力呈复杂的"波浪形"分布;偏压作用下,随着宽高比的增大,基础刚度减小,基底压力最大值由边缘向偏心位置处转移。研究成果对于偏心荷载下黏性土扩展基础基底反力的分布确定具有工程应用价值。At present,the experimental study on contact pressure distribution of spread foundation involved in clay ground and eccentric load is still rare. The large-scale indoor model test including axial and eccentric load on spread foundations of different width-to-height ratio,points out that the contact pressure of rigid spread foundation under axial load is relatively uniform,although the middle part contact pressure is smaller,and the flexible foundation＇s contact pressure shows complex ‘wave＇distribution. Under the eccentric load,with the increase of width-to-height ratio,the spread foundation stiffness decreases,and the maximum value of the contact pressure shifts from the edge to the eccentric position. The research results show that the contact pressure distribution of spread foundation on clay ground under eccentric load has important value of engineering application.

关 键 词：扩展基础 基底压力 基础宽高比 轴压 偏压 黏性土 

分 类 号：TU442[建筑科学—岩土工程]