深埋多层大跨铁路车站施工对八达岭景区影响的数值分析

Numerical Analysis on Influence of Deep-buried Multi-storey Large-span Railway Station Construction on Badaling Scenic Spots

在国家著名风景区下面修建多层大跨交通车站结构,具有复杂的施工程序和较大的施工难度。随着如何验证在施工过程中,景区文物有没有受到较大影响,成为工程建设前必须要解决的现实问题。针对新建京张城际铁路八达岭地下站这一实际工程,利用ABAQUS软件,分别建立了在八达岭山体中开挖斜井、竖井群洞和车站主体结构施工的三维有限元模型,模拟了斜井开挖、车站施工过程中对围岩及地表环境的影响。数值分析表明,在推荐的施工方案下,围岩位移和围岩应力均没有超过允许值,地表沉降对景区影响甚微,为该工程的实施提供了依据和指导作用。

There are complicated construction process and great difficulties in building multi-storey and large-span station structures under famous national scenic spots.How to verify the construction＇s influence on the cultural relics is a practical problem to be solved before engineering.Based on the engineering practice of Badaling underground station in new Jing-Zhang Inter-city Railway,the paper used the software ABAQUS to establish respectively the three-dimensional finite element models of the excavated inclined shafts,shafts group tunnels,and station main body structure construction in Badaling Mount.,and simulated the excavation of inclined shaft and station construction＇s influence on surrounding rocks and surface environment.Numerical analysis indicated that the displacements and stresses of the rocks didn＇t exceed the allowable values,and there was minor influence of surface settlement on the scenic spots with the recommended construction schemes,providing basis and guidance for the implementation of this project.