岩鹰鞍隧道逆冲强涌水断层高位泄水施工技术
|
摘要
针对怀邵衡铁路岩鹰鞍隧道F4断层带涌水涌砂的隧道施工难题,主要运用FLAC3D进行数值模拟,根据实际地质情况确定断层带的隧道力学参数,结合现场设计方案建立以岩鹰鞍正洞、排水支洞以及迂回导洞在内的三维计算模型,确立了只进行正洞开挖与先修建排水支洞和迂回导洞再进行正洞开挖两种不同的计算工况。无排水支洞与有排水支洞两种工况计算的结果表明,先开挖排水支洞和迂回导洞再进行正洞开挖有利于隧道围岩的稳定性,保证施工安全。根据计算结果设计完成泄水分压,迂回绕行的施工方案。
In order to solve the construction problems of the tunnel with water and sand gushing in the F4 fault zone of Yanyingan tunnel in Huaishaoheng,the tunnel mechanical parameters in fault zone were determined by using FLAC3 D numerical simulation,according to actual geological conditions of the tunnel,combining with the design scheme to establish a three-dimensional calculation model of Yanyingan hole,drainage tunnel and circuitous heading. Two different calculation conditions,tunnel excavation only,and construction of drainage tunnel and roundabout heading followed by tunnel excavation,were confirmed. The results of two working conditions show the latter condition is beneficial to the stability of tunnel wall rock and guarantee the construction safety. the solution of water pressure separation and bypass construction is designed according to the calculated results.
In order to solve the construction problems of the tunnel with water and sand gushing in the F4 fault zone of Yanyingan tunnel in Huaishaoheng,the tunnel mechanical parameters in fault zone were determined by using FLAC3 D numerical simulation,according to actual geological conditions of the tunnel,combining with the design scheme to establish a three-dimensional calculation model of Yanyingan hole,drainage tunnel and circuitous heading. Two different calculation conditions,tunnel excavation only,and construction of drainage tunnel and roundabout heading followed by tunnel excavation,were confirmed. The results of two working conditions show the latter condition is beneficial to the stability of tunnel wall rock and guarantee the construction safety. the solution of water pressure separation and bypass construction is designed according to the calculated results.
引文
[1]罗春雨.五指山特长隧道特大涌水坍方迂回导洞处理技术[J].公路交通科技:应用技术版,2017(6):294-296.
[2]黄明琦.复杂地质大断面海底隧道穿越富水砂层施工技术研究[J].铁道建筑技术,2016(6):23-26.
[3]任昌真,史友海,杨贵.迂回导洞在新南岭隧道施工中的应用[J].现代隧道技术,2013(1):146-149.
[4]周军伟.白云隧道突水、突泥段施工技术[J].隧道建设,2011(4):504-509.
[5]徐森泉.清远抽水蓄能电站自流排水洞施工支洞比选[J].价值工程,2011(9):52-55.
[6]王伟.宜万铁路齐岳山隧道629富水溶洞综合处理技术[J].现代隧道技术,2010,47(5):98-102.
[7]张旭东,汪海滨,封明君,等.释能降压工法在高压富水岩溶隧道风险规避中的应用研究[J].岩石力学与工程学报,2010(S1):2782-2791.
[8]陈先国,罗春雨,祁海军.五指山特长隧道特大突涌水坍方处理的泄水方案[J].公路,2008(4):217-221.
[9]刘道华,樊有望.排水洞围岩稳定性有限元分析研究[J].中国水运:理论版,2007(11):80-81.
[10]杨宗海.西洱河三级电站引水隧洞施工支洞的超前排水[J].水力发电,1984(5):39-44.
[11]吴治家.套衬技术在隧道病害整治工程中的应用[J].铁道建筑技术,2011(5):31-33.
[12]段超.浅谈高速铁路隧道防水施工技术[J].科技创新导报,2011(29):25-26.
[2]黄明琦.复杂地质大断面海底隧道穿越富水砂层施工技术研究[J].铁道建筑技术,2016(6):23-26.
[3]任昌真,史友海,杨贵.迂回导洞在新南岭隧道施工中的应用[J].现代隧道技术,2013(1):146-149.
[4]周军伟.白云隧道突水、突泥段施工技术[J].隧道建设,2011(4):504-509.
[5]徐森泉.清远抽水蓄能电站自流排水洞施工支洞比选[J].价值工程,2011(9):52-55.
[6]王伟.宜万铁路齐岳山隧道629富水溶洞综合处理技术[J].现代隧道技术,2010,47(5):98-102.
[7]张旭东,汪海滨,封明君,等.释能降压工法在高压富水岩溶隧道风险规避中的应用研究[J].岩石力学与工程学报,2010(S1):2782-2791.
[8]陈先国,罗春雨,祁海军.五指山特长隧道特大突涌水坍方处理的泄水方案[J].公路,2008(4):217-221.
[9]刘道华,樊有望.排水洞围岩稳定性有限元分析研究[J].中国水运:理论版,2007(11):80-81.
[10]杨宗海.西洱河三级电站引水隧洞施工支洞的超前排水[J].水力发电,1984(5):39-44.
[11]吴治家.套衬技术在隧道病害整治工程中的应用[J].铁道建筑技术,2011(5):31-33.
[12]段超.浅谈高速铁路隧道防水施工技术[J].科技创新导报,2011(29):25-26.