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基于界面力学理论,用有限元软件对含土洞三元土层结构的岩溶塌陷进行数值模拟,发现界面的存在对岩土体结构的变形有较大的影响,各岩土层的应力在界面与土洞周围存在应力集中、应力不连续现象,结构的破坏是从下层软土与岩石交界面开始的,与桂兴村塌陷的实际相符。为岩溶区地面塌陷的调查与评价提供了一些新的参考。
Based on the theory of interface mechanics, the finite element software is used to simulate the karst collapse of ternary soil-structure with soil cavity. It is found that the existence of interface has a great influence on the deformation of soil-rock structure. The stress of each soil layer is in the interface There is stress concentration and stress discontinuity around the soil cavity. The structural damage started from the interface between the soft soil and the rock in the lower layer, which is consistent with the actual collapse of Guixing village. It provides some new references for the investigation and evaluation of ground subsidence in karst area.