北京地铁4号线新增检票厅工程离散元仿真分析

为研究北京地铁4号线宣武门站新增地下检票厅开挖对周边结构影响,探究检票厅开挖过程中施工措施的应用效果,采用离散元软件UDEC对检票厅及周边结构位移进行分析,研究周边结构的位移特征,分析周边结构的稳定性.结果表明:检票厅开挖后最大竖向位移为18 mm,最大水平位移为4 mm;周边结构的竖向位移最大值出现在换乘通道结构顶板...

Discrete element simulation analysis of the new ticketing hall project of Beijing metro line 4

In order to study the impact of the excavation of the new underground ticketing hall on the vicinity structure of Xuanwumen Station of Beijing metro line 4 and explore the application effect of the construction measures in the excavation process of the ticketing hall,this paper analyzes the displacement of the ticketing hall and the surrounding structure by using the discrete element software UDEC,studies the variable displacement characteristics of the vicinity structure,and analyze the stability of the surrounding structure.The results show that:after the excavation of the ticketing hall,the maximum vertical displacement is 18 mm and the maximum horizontal displacement is 4 mm,the maximum vertical displacement of the surrounding structure appears in the center of the roof of the transfer passage structure,while the displacement is 7.5 mm,the maximum horizontal displacement appears in the left wall of the main structure of the station,and the displacement is 1.9 mm,and the displacement is within the displacement control range of the corresponding risk level.