V形深切河谷震害調(diào)查及公路重建工程減災(zāi)對策研究.pdf_第1頁
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1、西南交通大學(xué)碩士學(xué)位論文V形深切河谷震害調(diào)查及公路重建工程減災(zāi)對策研究姓名：袁泉申請學(xué)位級別：碩士專業(yè)：建筑與土木指導(dǎo)教師：姚令侃；曾宇201207西南交通大學(xué)碩士研究生學(xué)位論文第1I頁AbstractVshapeddeepvallyisthenormalgeomorphologyinsouthwesternmountainareasItisusuallythecorridorforthehighwayYuzhicreekisthefi

2、rsttributaryoftheMingRiver，anditisthetypicalVshapedvally$303highwayfromYingxiutoWolongisalongtheYuzhicreek，whichlocatestheepicenterofthe512WenchuanEarthquakeThedistancebetweentheYinxiu—Gendasections(18kan)totheearthquake

3、centerisabout7kmBasedontheengineeringbackground，coseismicgeologicaldisastersandroaddamageswereinvestigatedTheformsofcoseismicgeologicaldisastersoftheVshapedvallyinthenearfieldregionwereresearchedCombiningthesecondarydisa

4、stersaftertheearthquake，themechanismofthesecondarydisastersinducedbytheearthquakewasstudiedThecontermeasuresforthesecondarydisastersduringthehighwayrepairprojectwereproposedBasedonthisresearch，theuniversalcontermeasuresf

5、orthemechanismofhighwayearthquakedisastersalongtheVshapedvallywereproposedThemainconclusionsareasfollowing：1Duringtheformationprocessoftheslopelandformscausedbythemountainuplift，tectonicmonement，andrivererosion，theVshape

6、ddeepvaUyisatthetheinitialstageoftheevolutionofthevallylandformsThestrssandstrainintheshallowstructurearereleasedintheshortperiodoftimebecauseoftheearthquakeThereleaseofthestressandstrainbeforetheevolutionofthevallylandf

7、ormsinducestheseriousdamagesofthesurfaceUnderthesamelithologyandtheseismicintensitycollapseofthelandslidescausedbytheearthquakeintheVshapedvallyismoreseriousthanthatintheUshapedvally2Usuallythecoseismicslopedisasteristhe

8、collapseintheVshapeddeepvally、析tllhardbedrockForhighwaythemainearthquakedamagemodeistheblockoftheroadbytherockpilesbecauseofthecollapseoftheupperslopeThemainearthquakedamagemodeforthebridgeisthesmashbytheboulderDuetothen

9、arrowofthevallytheriverca，nbeblockedeasilybytherockpilesfromthecollapseoftheupperslopeTheroadisfloodedbythemultilevelquakelakeThisisthetypicalearthquakedamageintheVshapedvally3Themainsecondarydamageaftertheearthquakeisth

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