中文摘要：

针对采空区沉陷容易导致路基路面发生变形破坏的工程技术难题,基于采空区位置对路基路面变形响应的影响程度,提出了采空区临界区域的概念,采用有限元数值分析方法,建立了采空区临界区域的确定方法,由此揭示了采空区路基填筑高度对沥青路面设计指标弯沉及层底拉应力的影响规律,并基于采空区引起的路基顶面的不均匀变形,揭示了5种路面结构路表弯沉与层底拉应力的变化规律。研究结果表明：处于临界影响区范围外的采空区对土基表面最大位移的影响小,可忽略不计;采空区影响范围内的路表弯沉比层底拉应力对路基填筑高度变化敏感,柔性基层沥青路面结构适应变形能力强。

英文摘要：

For the engineering technical problems of the deformation destroy of the subgrade and pavement caused by the mined-out area subsidence, the concept of critical zone of mined-out area was put forward according to the influence degree of the subgrade and pavement on deformation response in the position of the mined-out area. Then the method to determine the critical region of mined-out area was established by using the finite element numerical analysis method. It re- vealed the influence law of the filling height of the subgrade on asphalt pavement design indexes （deflection and its tensile stress in the bottom layer）. Based on the non-uniform top deformation of subgrade caused by the mined-out area, it revealed the change rule of pavement surface deflec- tion and tensile stress in the bottom layers of five kinds of pavement structures. The result shows that the influence of the mined-out area outside the critical impact area on the maximum displace- ment on the subgrade surface is too small to be ignored. The influence of the road surface deflec- tion within the impact area of mined-out area is more sensitive to subgrade height change than the bottom layer tensile stress. The flexible base asphalt pavement structure has stronger ability to a- dapt to the deformation than the semi-rigid base one. 3 tabs, 12 figs, 16 refs.