齐岳山隧道断层注浆截水帷幕施工技术样本.doc

齐岳山隧道F11断层注浆截水帷幕施工技术卢炜1汪玉华2（1.中华人民共和国中铁股份有限公司，北京100039；2.中铁隧道集团有限公司洛阳科学技术研究所，河南洛阳471009）摘要:研究目：山岭隧道在穿越断层破碎带时，经常会遇到高压水，如解决不当，往往会引起突水突泥、坍方甚至泥石流严重威胁，给施工安全导致极大威胁，施工进度也无法保证，严重时，还会使周边生态环境发生恶化。因而在隧道穿越该区域时，必要采用一种有效办法来保证施工安全及周边生态环境免遭破坏。研究结论：齐岳山隧道在穿越F11断层高压富水带时，在该段钻孔过程中，单孔最大涌水量达到1800m3/h，水压高达3.2MPa，给施工带来巨大风险。在施工过程中，按照“以堵为主，限量排放”原则，采用硫铝酸盐水泥单液浆、普通水泥单液浆、普通水泥—水玻璃双液浆，通过合理匹配注浆参数，精心组织施工，对掌子面前方高压富水地段进行了注浆封堵，形成一道截水帷幕，同步对前方破碎围岩进行了有效加固，为施工创造了条件，保证了隧道施工安全及周边生态环境不被破坏，对此后类似工程具备重要指引意义。核心词：断层；高压富水；注浆；截水帷幕中图分类号：U25文献标记码：AConstructionMethodofGroutingWater-sealCurtainofF11FaultinQiyueshanTunnelLUWei1WANGYu-hua2(1.ChinaRailwayGroupLimited,beijing100039，China；2.ScientificInstituteofChinaRailwayTunnelGroup.Luoyang，Henan471009，China)Abstract：purposes：Whenthetunnelcutsthroughthefault-fracturezone，highpressurewateroftenemerges.Ifreasonablemeasuresarenottaken，itwillfrequentlyinducewaterandmudinrush，collapseevendebrisflow，whichwillseriouslythreatentheconstructionsafetyanddelaytheconstructionprogress.Itwilldeteriorateecologicalenvironmentifnottreatedproperly.WhenQiyueshantunnelcutsthroughthehighpressureandenrichedwaterregioninF11fault，effectivemeasuresshallbetakeninordertoensuretheconstructionsafetyandthesurroundingecologicalenvironmentnotdeteriorated.Conclusions：AsQiyueshantunnelcutsthroughthehighpressureandenrichedwaterregioninF11fault，themaximumvolumeofwaterreleaseandwaterpressureduringboringstageareupto1800m3/hand3.2MPa，respectively.Accordingtotheprincipleof“Focusingonblockingandreleasingwithinlimitation”，sulphatealuminiumcementsingle-fluidgrouting，commoncementsingle-fluidgrouting，andcementandsodiumsilicatemixedgroutingareusedwiththerationalproportionedgroutingparameterduringtheconstructionprogress；therefore，thehighpressurewateriseffectivelycontrolled，thewater-sealcurtainisformedandmeanwhilethecrushedsurroundingrockisreinforced，whichpavesthewayfortheconstructionandensuresthetunnelingsafetyandthesurroundingecologicalenvironmentnotdeteriorated.Theprojectcasecanprovidereferenceforsimilarworksinthefutur