文档介绍：Safety Analysis on the Structure of an Existing Metro Station Impacted
by the Construction of an Adjacent Building
Liheng Ma a, Qinghuai Liang b, Liu Yifan c and He Mingran d
Beijing Jiaotong University, Beijing, China
amaliheng1984@,******@.,cliuyifan@,
dhemingran@
Keywords: metro station; adjacent construction; foundation excavation; safety assessment.
Abstract. Structural deformations of the existing metro station caused by adjacent building construction should be controlled strictly so as to keep the normal operation of the existing metro station and guarantee the safety of the station structure. Based on a foundation pit excavation and building project which is adjacent to an existing metro station in Beijing, a 3D finite element model of foundation pit, metro station and surrounding soil is established. Then, the structural deformations of the main body structure (rail area), the passageway and the fire fighting passageway in different construction stages are obtained. The control values of the station structure deformation during building construction process are proposed according to the calculation results.
Introduction
With the large-scale development and utilization of urban underground space and the rapid construction of urban rail
transit facilities, more and more housing projects are constructed nearby the existing metro station. Foundation pit excavation and new housing load can affect the surrounding soils, causing stress redistribution, breaking the initial equilibrium state and leading to deformation of the station [1]. In order to ensure the safety of the existing station [2], it is necessary to assess the structural safety, and choose the deformation control values before the construction begins. What’s more, the structural deformation of station must be controlled strictly during the whole process of construction. Many scholars had studied on this problem, and got some beneficial results [3-6].
Based on a found