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穿越煤系地层高瓦斯隧道关键施工技术

Key Construction Technology of High Gas Tunnel Crossing Coal Measures Strata
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摘要 以都江堰至四姑娘山山地轨道交通中的观音坪隧道为工程依托,由于隧道穿越含有高瓦斯及其他有毒有害气体的煤系岩层,运用BIM技术所构建的三维地质模型,能够真实把握掌子面及周边区域内的施工区域地质状况、埋深等状况,为施工计划的制订提供了可信的技术基础,保证施工安全。通过三元素法对隧道施工风险源进行识别和评价,得到高瓦斯问题为隧道面临的最大风险。针对隧道高瓦斯问题和观音坪隧道工程实际,建立了一套完善的隧道瓦斯监测体系和瓦斯超限处理流程。 It is based onthe Guanyinping Tunnel in the Dujiangyan Siguniang Mountain rail transit,and according to the characteristics of the tunnel passing through coal-measure strata rich in gas and other toxic and harmful gases,a three-dimensional geological model of the tunnel is established by BIM technology,and the master is controlled in real time.The surrounding rock geological conditions and burial depth in the surrounding area of the surface can provide a reliable basis for the determination of the construction plan and ensure the safety of the construction.The three-element method is used to identify and evaluate the risk source of tunnel construction,and it is concluded that the high gas problem is the biggest risk faced by the tunnel.In view of the problem of high gas in the tunnel and the actual situation of Guanyinping Tunnel,a set of perfect tunnel gas monitoring system and gas overrun treatment process are established.
作者 阮小勇 RUAN Xiaoyong(Sinohydro Bureau 7 Co.,Ltd.,Chengdu,Sichuan Province,611134 China)
出处 《科技资讯》 2022年第23期98-101,127,共5页 Science & Technology Information
关键词 煤系地层 高瓦斯 BIM技术 风险源识别 瓦斯监测与超限处理 Coal measure strata High gas BIM technology Risk source identification Gas monitoring and overlimit treatment
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