周边建筑活动影响下地铁箱型隧道结构安全监控指标分析

On Monitoring Data for the Security of a Box-Type Subway Tunnel Structure Under the Influence of Surrounding Construction Activity

文章针对地铁隧道箱型结构整体刚度大、抗变形能力差,以及周边建筑活动易影响隧道结构安全等特征,分析了隧道衬砌结构病害机理及其对结构安全的影响;通过对箱型隧道在周边建筑活动影响下横断面内和空间的变形及内力特征的统计分析,给出了对该结构安全监测的指标和控制值。分析与应用结果表明,所提出的安全监测指标和控制值的确定方法安全可靠,对类似工程的结构安全监控具有借鉴和指导意义。

In this paper, the structural problems of a box-type subway tunnel and their impact on structure safety is analyzed considering such features as large integral rigidity, vulnerability against deformation, and likelihood of being affected by surrounding construction activity. The index and control values of safety monitoring for this type of structure are presented in accordance with a statistical analysis of cross section, space deformation, and internal force features of a box-type tunnel under the influence of surrounding construction activity. The results of this analysis and its application show that the proposed method for defining the index and control values for safety monitoring is safe and reliable and can provide a reference for structural safety monitoring in similar works.