第三系高压富水砂泥岩地层隧道技术研究——以牡绥铁路双丰隧道为例被引量：8

Study of Tunneling Technology in Tertiary Sandy Mudstone Strata with Rich Water under High Pressure: Case Study of Shuangfeng Tunnel of Mudanjiang-Suifenhe Railway

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摘要牡绥铁路双丰隧道洞身穿越长段落、大埋深、富水的第三系砂泥岩地层。为解决隧道降水、超前加固、结构设计及施工方法等技术难题,控制隧道变形,防止涌水、涌泥及坍塌等工程风险,通过现场试验和数据分析,建立了“立体探查、泄水降压、超前加固、支护紧跟、全面监测”的技术路线;确定了地表、洞内超前、洞内径向全方位立体探查与泄水降压的方法,形成了隧道开挖轮廓内外差异化的超前预加固工艺;提出了微台阶开挖、支护紧跟的施工方法;通过监测成果,对隧道结构安全性进行评价。结果表明:第三系高压富水砂泥岩隧道采用全方位立体泄水降压方法及开挖轮廓内外差异化超前预加固工艺,并采用微台阶法开挖、支护紧跟的施工方法,可有效控制隧道变形,确保隧道施工安全。 In order to deal with the technical problems of Shuangfeng Tunnel passing through water-rich Tertiary sandy mudstone strata with long distance and big overburden,such as dewatering,advance reinforcement,structural design and construction method etc.,reducing tunnel deformation,preventing water inrush,gushing mud and tunnel collapse,the technical route of M stereo exploration,pressure reduction by water releasing,pre-grouting,supporting timely,overall monitoringM is established after the field test and data analysis.Methods of full-dimensional exploration and water pressure reducing are proposed,which form the preceding reinforcing technology that are different between inside the excavation contour and outside the excavation contour.Support linings are constructed immediately after excavation of upper bench.Safety performance of tunnel structure is evaluated according to the monitoring results.The research is conducted based on Shuangfeng Tunnel and the study results are applied in the construction of the tunnel.Results indicate that it can make sense to control deformation and ensure safety by using methods of reducing pressure through full-dimensional water release,adopting advance reinforcement measures that are different between inside the excavation contour and outside the excavation contour,proposing mini-bench method during tunnel construction and supporting timely after excavation for tunnels passing through water-rich Tertiary sandy mudstone strata.

作者马志富杨昌贤 MA Zhifu;YANG Changxian(China Railway Design Corporation,Tianjin 300142,China)

机构地区中国铁路设计集团有限公司

出处《隧道建设（中英文）》北大核心 2018年第3期434-443,共10页 Tunnel Construction

基金中国铁路总公司科技研究开发计划重点课题(2013G011-B) 铁道第三勘察设计院集团有限公司科研开发重点课题(721332)

关键词铁路隧道涌水涌泥第三系砂泥岩超前加固泄水降压空腔泄水径向泄水地表降水 railway tunnel water/mud gushing Tertiary sandy mudstone strata pre-grouting pressure reduction by water releasing water releasing from cavity radial water releasing dewatering from ground surface

分类号 U459.1 [建筑科学—桥梁与隧道工程]