复杂地质环境下异形交叉暗挖通道施工技术

Construction Technology of Irregular Cross Excavation Tunnel in Complex Geological Environment

随着我国城市轨道交通事业的发展,地铁施工的难题随之增多。针对异形交叉暗挖通道施工问题,本文以北京地铁3号线朝阳公园站至石佛营站区间工程为例,根据工程所处地质环境及相关设计参数,采用CRD法同时辅以超前小导管注浆加固措施的施工方案,有效控制了该工程的风险,保证了工程的顺利施工,在整个暗挖通道施工过程中,挑高段部分施工导致的地表沉降量最大,以期为类似工程提供参考。

With the development of urban rail transit in China,the difficulties of subway construction are increasing.In view of the construction problems of irregular cross tunneling,taking the section project from Chaoyang Park station to Shifoying station of Beijing Metro Line 3 as an example,according to the geological environment and related design parameters of the project,the construction scheme of CRD method combined with advanced small pipe grouting reinforcement measures is adopted,which effectively controls the risk of the project and ensures the construction of the project.In the construction process of the underground excavation tunnel,the surface settlement caused by the construction of high section tunnel is the largest.It is expected to provide some reference for similar projects.