Numerical Analysis of Roadbed Settlement in Goaf Area of Expressway
In places rich in coal resources,such as Anyuan Coal Mine in Pingxiang,a large number of goaf areas have been formed in the coal mine area after long-term and large-scale mining,and the roads built have to pass through or be built around the goaf areas.In order to ensure the normal operation of the goaf roads,taking Zhonghuan East Road in Pingxiang City as the background,the influencing factors of road surface load,goaf location and fill area are considered.ABAQUS numerical simulation is used to analyze the influence of gob on the settlement of the upper subgrade.The simulation results show that with the increase of load,the subgrade settlement increases and the slope increases.When the relative position relationship between the goaf and the roadbed is changed,the maximum settlement of the roadbed surface and the maximum settlement of the central location of the goaf will change accordingly.Adding geocell to backfill can effectively reduce the settlement of subgrade,and increasing the modulus of geocell can appropriately increase the reinforcement effect.The material parameters of backfill have obvious influence on the settlement,and can also reduce the settlement of subgrade to a certain extent.
万方数据
维普
