地铁折返线隧道二衬特殊支架法施工技术

北京地铁10号线10标段折返线隧道二衬采用特殊支架法施工。介绍了纵分段、横分层、借梁换柱;散支散拼、隔段跳做;先二衬、后破除的施工方案,以及在工程实施中对施工节段长度、中隔壁凿除顺序、施工模架体系及组织运输等的合理选择,确保二衬施工安全、进度、质量及成本控制均达到预期目标。

A Special Support Technique for the Construction of Subway Turn-back Line Tunnel

A special support technique of the secondary lining is adopted for the construction of the turn-back line tunnel in the 10# contract of Beijing Subway Line 10.This paper introduces briefly the length of construction segment,the sequences of center dissepiment excavating,the frame system and transport organization,argues that a reasonable selection could ensure the safety construction,the scheduled progress,the quality and cost control,expects to achieve the expectative objectives.