危岩崩塌稳定分析评价

335200710SichuanBuildingScience:2006203221:(1969-),,,,,E-mail:[e-mail]1,2,1(11,621010;21,471003):,Sarma,,,:;;;;:TU457:A:1008-1933(2007)05-0069-04StabilityanalysisandevaluationofthedeformeddangerousrockcollapsingHEJianping1,2,YUYuanzhong1(1.SchoolofCivilEngineeringandArchitecture,SouthwestUniversityofScienceandTechnology,Mianyang621010,China;2.LuoyangCollegeofTechnology,Luoyang471003,China)Abstract:OnthebasisofChuanzhongdangerousrockofgeometry,stratifiedrockcondition,structuralandhydrogeologicfeatures,accordingtomechanicalproperties,foundingcalculationpatternofdangerousrockofcapsizingcollapsing.ThepaperusestheSarmamethodtoevaluationandstabilityanalysisofdangerousrockonnatureandwell2wateredcondition,analyzingmainlycauses,somemeasurestoreinforceanddrainoffwaterareproposed.Itisofgreatsignificancetoreduceharminengineeringpractice.Keywords:Sarmamethod;dangerousrock;collapse;stabilityanalysis;evaluation0,,,,,,,,1,,,,51m,,,2m,,3(1),1(,,)Fig.1Dangerousrocksectiondistributingsketchmap,,,20cm,2,,12,,,,,100m3,,,,,,,9622.1,,,,69,60%2.2(Qdel4),,,,,13m;(J3P),,,68%2.3,,553,,,,,,,,10/m26,0105g2.4,,,,0104L/s,58m,,[4]2.5,3,,19,017m,114m,,,80,,,[4]4Sarma,,;,,,,[3]4.1,n,,,,i[1],22iFig.2Geometryandmechanicsmodelofthebarblock:Xti,Yti;Xbi,Ybi;Xwi,Ywi;di,di+1;bi;i;Di,Di+1;Zwi,Zwi+1;Wii;KCWi,Pwi,Pwi+1;Ui;Ei,Ei+1;Xi,Xi+1;Ni;Ti07334.2,KC(KC,,KC,)KC,Fs:,,tgUCtgU/FsC/Fs(Fs),FsKC,Fs[2],:Xi=0(i=1,2,,n)(1)Yi=0(i=1,2,,n)(2)Ti=f(Ni,CBi,Bi)(i=1,2,,n)(3)Xi=f(Ei,CSi,Si)(i=1,2,,n)(4)(1),(2),(3),(4),:KC=a1e2en+a2e2en++an-1e2enP1e2en+P2e2en++Pn-1e2en(i=1,2,,n)(5)ai=[Ricosbi+Wisin(bi-i)+Si+1sin(bi-i+1-i)-Sisin(bi-i-i)]Pi=QiWicos(bi-i)ei=Qi[cos(bi-i+si+1-i+1)secsi]Qi=sec(bi-i+si+1-i+1)cossi+1Ri=Csibiseci-UitgsiSi=Csidi-PWitgsiSi+1=Csi+1di+1-PWi+1tgsi+1Cbi,bii;Csi,si,Csi+1,si+1ii+1;UBi,Cbii,Usi,Csii5,,,,019,3%,,11Table1Parametertable/(g/m3)/kPa()/()/kPa/()/kPa2.342.3623.6617.0837.903.9036.703.2666.1,,,:(1),,,,Q,;(2),,,26.2,,,,3,,,,,,Q,33Fig.3Dangerousrocksectioncountmodelandmarkingblockmap6.3,272,:172007No15,:2Table2DangerousrocksectionstabilitycomputeproductionmapL/mS/m2a/()/(g/cm2)c/kPa/()M/(103kg)11.15.3057.32.353.9037.912.466751.3521.35223.330.8557.32.353.9037.972.5094.75931.95.5559.62.353.9037.913.0541.89111.15.3057.32.373.2636.712.466750.9420.94223.330.8557.32.373.2636.772.5093.2231.95.5559.62.373.2636.713.0541.162,:110k115,;,k=01942110kf=MMkf=1113,:(1),,,,,,,,,,(2),,,,,,(3),,,,,,,,,(4),,,,;,,,,[6]8Sarma,,,,,100m3,,,:(1);(2);(3),,Sarma:[1],.[M].:,1999.[2],.(2)[M].:,1996.[3],.Sarma[J].,2002,(9):4632465.[4][R].2005.[5],,.[J].,2002,(4):5022508.[6],,.[J].,2004,(1):1412144.2733