地铁浅埋暗挖段穿越地裂缝施工技术及措施探析

Construction Technology and Measures of Crossing Ground Fissure in Subway Shallow Buried Excavation

西安地铁四号线含元路站—大明宫站区间穿越f2地裂缝,为了确保地铁建设时的施工安全,及避免运营期间因地裂缝不均匀沉降、变形等活动造成地铁结构变形超限及衬砌破坏渗水等病害,采取了超前管棚和小导管注浆防护、CRD法开挖、断面扩挖预留变形值、设置特殊变形缝及加强变形监测等技术措施确保地铁施工及运营安全。

In order to ensure the construction safety of the subway construction and avoid the subway structure deformation overrun andlining damage water seepage and other diseases caused by uneven settlement and deformation of the ground during the operation,in theconstruction of Xi'an subway No.4Line Hanyuanlu station to Daminggong station passing through f2ground crack,this paper takes thetechnical measures of lead tube and small pipe grouting protection,CRD excavation,section expansion deformation value,setting up specialdeformation joints and strengthening the deformation monitoring to ensure the construction and operation of subway safety.