地铁车站结构施工缝渗漏破坏特征分析

Analysis of Leakage Defect Patterns at Structural Construction Joints of a Subway Station

地铁车站大部分处于地下水位附近,长期受水的侵蚀作用易使地铁车站主体结构中的施工缝产生渗漏病害,从而对地铁车站结构的使用寿命和安全造成危害。为此,依托哈尔滨轨道交通二号线一期尚志大街站,基于现场施工资料,初步探讨施工缝渗漏病害,进而采用数值计算分析方法,利用迈达斯GTS NX软件建立地铁车站三维力学计算模型,深入研究地铁车站结构施工缝诱发渗漏病害机理,揭示地下水在地铁车站结构施工缝中的渗透发生、发展及病害过程,为类似工程建设和治理提供理论参考。

Most of the subway stations are located near the groundwater zone,and the long-term water erosion will easily result in leakage hazards at the construction joints of the main structure of the subway stations,which will adversely affect the service life and safety of the subway station structures.This paper presents a case history of construction joints treatment for the groundwater leakage in the construction of Shangzhi Street Station of the first phase of Harbin Rail Transit Line No.2.Based on field construction data,this paper discusses the leakage patterns observed in the construction joints.The groundwater leaking problem was then numerical analyzed throughout a three-dimensional finite element by using Midas GTS NX software.The patterns of seepage hazards induced by construction joints of metro station structure was extensively investigated.And the groundwater leakage at the metro station structures was then able to be mitigated due to a better understanding of the process of seepage occurrence,development and hazard at construction joints of underground reinforced concrete structures.