地铁车站基坑施工对紧邻既有轻轨高架桥安全影响分析

An Analysis of the Effect of the Construction of the Foundation Pit of a Metro Station on the Safety of an Existing Neighboring Viaduct of a Light Rail

以某地铁车站为背景,对紧临既有轻轨高架桥的地铁车站基坑施工过程安全状况进行分析。首先研究本工程中的轻轨高架线路变形控制标准,然后通过数值模拟方法,分析基坑开挖施工对快轨桥跨结构安全性的影响,对基坑开挖引起轻轨高架桥梁结构变形进行模拟计算,得出按设计要求进行基坑开挖对轻轨高架桥梁结构影响较小,并给出监测建议和保护措施,为类似工程提供借鉴。

With a certain metro station as the background,the effect of the construction of a foundation pit of a metro station on the safety of an existing neighboring viaduct of a light rail is analyzed in the present paper.First of all,the paper provides the deformation control standard of the viaduct of the light rail for the project.Then through applying the numerical simulation method,the effect of the excavation construction of the foundation pit on the safety of the viaduct structure of the fast-rail is analyzed,upon the basis of which the numerical simulation calculation is made of the effect of the excavation of the foundation pit on the deformation of the viaduct structure of the light rail and the design requirements for the excavation of the foundation pit that little affect the viaduct structure of the light rail are obtained,with suggestions on monitoring and protective measures put forward.The paper may serve as a useful reference for other similar projects in the future.