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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。
In the famous scenic area below the construction of multi-storey long-span traffic station structure, with complex construction procedures and greater construction difficulty. With how to verify in the construction process, scenic relics have not been greatly affected, as engineering construction must be solved before the reality. Aimed at the actual project of the newly built Beijing-Zhangjiajie underground railway station, using the ABAQUS software, the three-dimensional finite element model for the construction of inclined shafts, vertical shafts and station structures in the Badaling Mountains was established respectively. Excavation, station construction process on the surrounding rock and surface environment. Numerical analysis shows that under the recommended construction scheme, the surrounding rock displacement and surrounding rock stress do not exceed the allowable values, and the surface subsidence has little effect on the scenic area, which provides the basis and guidance for the implementation of the project.