四川512地震次生地质灾害的基本特征初析

14220086JOURNALOFGEOMECHANICSVol114No12Jun.2008:100626616(2008)0220109208[],,,,,,,,,,,,,,!:2008207218(6)(DZLXK)(62),,,,,2zy@151121,2,1,2,1,2,1,2,1,2(1.,100081;2.,100081):20085121428,810,,,,:;;;:P694,P315:A020085121428,810,IX:4072207J200708:198Email:hs100sohucom,300km(1),,5112,,,,51624,,,15112Fig11Locationofthe5112strongearthquake2damagedarea1111,5112:(),,()(A,B,C),,,,,,(),(D)(),0112008,,(E,F,G),,,5112-(H)112,,[13][45][68],5112,,,(,)(1),,(C),,(2),,,(A,A)(3),,,,(100104m3)(10104m3),(A,B,C,D)(4),,,(5),(E),(),,,(6),,,,(A,B,C,D)(7),,,(8),,,,,(D,)1112:5112H2,5112:(1),,,5112,,,,,(2),5112,MS510,MS610;,VIVI,VII,,,(2005)[5](2)2(,2005)[5]Fig12Relationbetweenseismicmagnitudeandinducedlandslides(afterBaoYejingetal,,2005)[5]3Fig13RelationbetweentheBeichuanfaultandearthquake2inducedlandslidesnearthecountyseatofBeichuan(3)(),(3),5112,,,,(),,,,21120084(),,()(5),,,(6),,,,(7),,,,,,,(),,;(),,,10m,,(A,B),30m,20m,,,,,,4,,5112,,,5112,,,5112,:(1);(2);(3);(4);(5);(6);(7)5112,3112:5112::,![1],.[J].,1997,6(1):2530.[2],.[J].,1994,16(1):95103.[3],,.[J].,1994,10(2):168174.[4].[M].:,1995.[5],,,.[J].,1998,20(4):4552.[6],,.[J].,2005,24(1):6670.[7].[J].,2003,18(4):6470.[8],,.[J].,2003,9(1):2130.GENERALCHARACTERISTICSOF5112EARTHQUAKE2INDUCEDGEOHAZARDSINSICHUANZHANGYong2shuang1,2,LEIWei2zhi1,2,SHIJu2song1,2,WUShu2ren1,2,WANGXian2li1,2(1.KeyLabofNeotectonicMovementandGeohazards,MinistryofLandandResources,Beijing100081,China;2.InstituteofGeomechanics,ChineseAcademyofGeologicalSciences,Beijing100081,China)Abstract:AnearthquakeofMS810hitWenchuan,Sichuan,onMay12,2008at2:28p1m.Beijingtime,whichbroughtseriousdisastersandgreatlossofpropertytothepeopleoftheearthquake2hitareas.Especiallytheseriousconsequencethattheearthquake2inducedgeohazardsinmountainousareascausedwasunexpected.Thispapermainlyreportstheprimaryinvestigationresultsoftheearthquake2inducedgeohazardsinsomeworst2hitmountainousareasneartheepicenterinSichuan,brieflydescribesthecharacteristicsofdevelopmentandharmofearthquake2inducedgeohazardssuchaslandslide,rockfalls,debrisflow,groundfissuresandsand2soilliquationandpresentssomeideasaboutthedevelopmentmechanismsofearthquake2inducedgeohazardsandproblemsthatneedtobefurtherstudied.Allthesehavecertainsignificanceforguidingthereconstructionofearthquake2hitareasandplanningcitiesandtownsinhigh2intensityareas.Keywords:Wenchuanearthquake;earthquake2inducedgeohazard;landslide;dammedlake41120085112:51126112008