采空区新填覆土压力作用下废弃立井力学性能研究OA

In order to reveal the impact of newly filled soil on the mechanical properties of abandoned shafts caused by the construction of new highways,this paper used ANSYS to simulate and calculate the mechanical properties of abandoned shafts under different soil cover thicknesses and shaft wall thicknesses.The research results showed that,when the thickness of shaft wall is the same,the extreme value of horizontal displacement of abandoned shaft wall increases with the increase of soil thickness,and when the thickness of newly filled soil is the same,the extreme value of horizontal displacement of abandoned shaft wall increases.The extreme value of horizontal displacement of abandoned shaft wall decreases with the increase of sidewall thickness,and the maximum horizontal displacement is at the bottom of abandoned shaft.When the thickness of the shaft wall is the same,the extreme value of the first principal stress of the abandoned shaft wall increases with the thickening of the covered soil,and when the thickness of the newly filled soil is the same,the extreme value of the first principal stress of the abandoned shaft wall decreases with the increase of the shaft wall thickness;most of the abandoned shaft concrete is in the compression state,and the inner concrete at the bottom of the abandoned shaft is in the tensile state.