采动区建筑物移动变形特性分析

Analysis of Movement and Deformation Characteristics of Buildings Above Mining Subsidence Areas

基于现场实测资料和理论分析 ,获得了采动区建筑物移动变形特性 :1 )靠近采空区侧建筑物下沉小于或接近地表下沉 ,远离采空区侧建筑物下沉大于地表下沉 ;建筑物下沉与地表下沉的差值是有限的 .2 )大多数建筑物的倾斜小于地表倾斜 .3)当设有滑动层时 ,建筑物水平变形大小与地表水平变形大小基本无关 ,加固可以减小建筑物的水平变形 ;位于拉伸变形区时建筑物产生的水平变形大于位于压缩区时产生的水平变形 ,位于拐点附近时建筑物产生的水平变形大于位于其它区域时产生的水平变形 .4)处于地表变形正曲率区时 ,传递到建筑物上的曲率较大 ;而处于负曲率区时 ,传递到建筑物上的曲率较小 .

Based on in situ measured data and theoretic analyses, the following characteristics of the movement and deformation of buildings above a subsidence area induced by coal mining were gained. A) The subsidence of the building’s side near goaf is less than or close to the ground subsidence, but that of the other side far away from goaf is greater than the ground subsidence, and the difference between building subsidence and its foundation subsidence is limited. B) The slope of most buildings is less than that of their foundation. C) The horizontal deformation of a building with a sliding side is basically independent of that of its foundation. Compared to a non reinforced building, a reinforced building yields less horizontal deformation. The horizontal deformation of a building is greater when it is located in a tension area than in a compression area, while if a building lies in the vicinity of the inflection point, it will yield larger horizontal deformation than in other areas. D) As a building lies in the positive curvature region, the curvature transferred to the building is bigger than that in the negative curvature region.