资源描述：
《高压岔管区断层带岩体水力劈裂探究》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、高压岔管区断层带岩体水力劈裂探究摘要:深埋隧洞岩在高水压力作用下可能会发生水力劈裂，尤其是断层及其影响带岩体。某抽水蓄能电站高压岔管区断层及影响带岩体灌浆前后的试验结果表明，灌浆后岩体的水力劈裂压力明显增加，但仍有17%试段岩体的水力劈裂压力值小于或等于引水水道内的静水压力。充水试验结果表明岩体没有发生水力劈裂，其原因可能有三个：一是不能依据压力增加的绝对值来判断岩体是否发生劈裂，应根据压力增加的相对大小来判断；二是尽管水道内的水压力很高，但水道内的水流通过钢筋混凝土渗漏到围岩灌浆圈时，会损失一部分水头，实际的水
2、压力比水道内的静水压力要低；三是与岩体的二次劈裂压力有关。关键词：断层带；水力劈裂；高压压水试验；水压力中图分类号：TV139.14；P641.4+1文献标识码：A文章编号:16721683(2014)02005904ResearchonHydraulicFractureofRockMassintheFaultZoneofHighpressureBranchPipeLIUZejunl,ZHUANGXianzhen2,QIANCheng3,GENGHaifeng4,LIUMing5(1.FacultyofArchi
3、tectureandCivilEngineering,HuaiyinInstituteofTechnology,Huaian223001,China；2.WaterConstruetionCompanyinPizhouXuzhou,Xuzhou221300,China；3.JiangsuHuaiyinConstrctionofHydroprojectLimitedCompany,Huaian223005,China；4.JiangsuProvinceXuzhouMunicipalWaterAffairsBurea
4、u,Xuzhou221000,China；5.SchoolofEnvironmentandCivilEngineering,JiangnanUniversity,Wuxi214122,China)Abstract:Hydraulicfracturemayoccurinthesurroundingrockofdeepburiedtunnelunderhighwaterpressure,especiallyinthefauItanditsinfluencingzonesTheresuItsofhighwaterpre
5、ssuretestbeforeandafterthegroutinginthefaultanditsinfluencingzonesofapumpedstoragepowerstationshowedthatthepressureofhydraulicfractureincreasesobviouslyafterthegrouting,butthehydraulicfracturepressurevalueofabout17%oftestsectionrockmassislessthanorequaltotheh
6、ydrostaticpressureinthediversionpenstock.However,theresuItsofwaterfillingtestindicatedthatthereisnohydraulicfractureinthefauItanditsinfluencingzones,whichmaybeduetothat：(1)theabsolutevaluesofincreasedpressuremaynotbeappropriatetodeterminetheoccurrenceofhydrau
7、licfracture,andtherelativevaluesofincreasedpressureshouldbeused；(2)althoughthewaterpressureishighinthepipe,thereisheadlosswhenwaterleaksfromreinforcedconcreteintowallrockgroutingzone,resultinginlowerwaterpressurethanthehydrostaticpressureinthepipe；and(3)these
8、condaryhydraulicfractureofrockmass・Keywords：fauItzones；hydraulicfracture；highwaterpressuretest；waterpressure目前，我国水利水电工程建设的规模越来越大，特别是一些抽水蓄能电站，水头差较大，有的甚至超过600m(如广州蓄能水电站)，其深埋隧洞(输水系统)将承受较大的内水
