不同JRC单裂隙渗流特征的试验研究

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1、国内图书分类号：P641．135国际图书分类号：西南交通大学研究生学位论文不同JRC单裂隙渗流特征的试验研究年级一二Qp四级姓专二oo七年六月西南交通大学硕士研究生学位论文第1I页AbstractHydrauIiCbehaviorinfracturedrockhasanimportanteffectongeotechnicaIengineering．suchaswater—grushinginexcavationofundergroundchambersandtunneIs．constructionofdamfoundation，expIoitationofoiIandterrestriaIh

2、eat．buriaIofchemicaImateriaIandhUGIearwaste，designonmiReandsoon．Atpresent．cubicIswbasedonparaIIeIPIatemodeIhasbeenacceptedingeotechnicaIengineeringfieId，andmanyschoIarshavedonemuchresearchworktomodifycubicIawinapertureandroughness．FortheapertureandroughnesswereacquireddifficuItIY．theappIicationofmod

3、ifiedcubicIawwasIimited．SotheauthorproposedtorepresenthydrauIicbehaviorinfracturedrockwithJRC(JointRoughnessCoefficient)．andresearchedtheinfIuenceofJRConthecoupIingofffuidffowandsttesswithexperiment．BasedontheparsIIeIPtatemodel．anaIog；zedtheformerschoIars’experiments．thisexperimentusedRCCPofpetroIeu

4、msystemtotestthepenetrabilityofjointswjthdifferentJRCunderdifferentstressconditions．ThemakingofthesampIewasfirstbasedonthetypicalroughnessproflIesbyBarton。machiningedtheJRCtempIaresusingthenumericaIcontro1wirecutEDM．thenpouredthesampIewithcementanddrilIedtencoiumniformconcretecoreswithdifferentJRC．T

5、heexperimentapproachedtopractiCaIengineeringprojectmuchbetterwithsimuIatingdifferentroughnessjoints．ThemeasuredparameterswereacquiredmoreeasiIYandtheproductionshadabetterpracticabiIityandpopuIarizabiIity．AnaIyzedtheresuIts．twomainconCIUSionswereeduced：(1)ThepermeabiIityofaaingIejointdecreasedwiththe

6、increasingeffectivestress，foIIowingtheIawofnegativeexponent．andJRChadsma

7、IeffectonthisIaw．西南交通大学硕士研究生学位论文第1II页(2)ThepermeabilityofasingIejointhadatrendofdecreasedWiththeincreasingofJRCundersameeffectivestressconditionsatmiddIe—IOWeffectivestressIeveI．ButthereguIaritywasnotevidentenough．andthefIuctua

8、tionwasextensiveIY，whichshowedJRChadnotbeenverygreateffectonpenetrabiIity．(3)FracturedrockcallletoawhoIerockastheeffectivestress{ncreased．andtheinfIuenceofJRConpermeabiIityhaddecreased．Keywords：JRC；as