采空区建筑地基稳定性评价研究  

Stability Analysis of the Building Foundation for Goaf

作　　者：张长敏[1] 祁丽华[2] 慎乃齐[2] 

机构地区：[1]中国地震局地质研究所 [2]中国地质大学(北京),北京100083

出　　处：《湖南科技大学学报（自然科学版）》2006年第4期47-50,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：北京市国土资源局资助项目[214(2005)]

摘　　要：以东方龙泉建筑工程为例,基于刚体极限平衡原理,采用力学分析方法确定了建筑荷载作用下采空区上覆岩层的临界厚度.同时,由现场勘察和地质资料,建立了采空区场地的工程地质模型和三维数值模型,应用FLAC3D揭示了采空区场地在自重场下和建筑荷载作用下的三维应力场、位移场和破坏场的变化特征,分析了地表残余变形倾斜值、最大水平位移及曲率等,对采空区场地地基进行了稳定性评价,得出该场区在建筑物荷载作用下采空区地基处于稳定性状态.该评价方法对类似工程有重要指导意义和借鉴价值.图6,表1,参7.Taking the orient Longquan project for example, according to the limit equilibrium theory, critical depth of stratum on the goaf is calculated by the method of mechanics. On the basis of the reconnaissance and geology data,the FLAC^3D is used to open out the changing characteristics of stress field, displacement field and state field, and to get the residual deformation dates of gradient, horizontal displacement and curvature, by means of which the stability of the building foundation on the goat＂ is analysed and shown at the state of stability underneath the building. The method is of great significance and value for similar projects to use as reference. 6figs., 1tab., 7refs.

关 键 词：采空区 稳定性评价 力学分析 数值模拟 

分 类 号：TU471.2[建筑科学—结构工程]