【摘要】 在深入分析岩溶及采空区岩层顶板安全厚度影响因素及岩溶岩层顶板安全厚度传统半定量分析方法存在缺陷的基础上 ,结合潭邵高速公路岩溶及采空区路基稳定性的特点 ,提出利用三维非线性有限元分析手段和枚举优化理论确定岩溶及采空区岩层顶板安全厚度的方法更多还原

【Abstract】 This paper analyzes profoundly the influence factor of safety thickness of top slab of rock bedding in karst and mined out region, and the defects in traditional semi quantative analysis method of safety thickness of top slab of rock bedding of karst. According to the characteristics of stability of subgrade in karst and mined out regions on Tan Shao Expressway, this paper presents analysis means of three dimensional nonlinear finite element and enumerates the methods of the optimization theory to determine safety thickness of top slab of rock bedding, which provides reliable basis for treatment scheme design of subgrade in karst and mined out regions on Tan Shao Expressway.更多还原