强降雨激励下松散岩堆路堑边坡稳定性分析.pdf

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1、第38卷第6期合肥工业大学学报(自然科学版)Vo1．38No．62015年6月JOURNALOFHEFEIUNIVERSITYOFTECHNOLOGYJun．2015doi：10．3969／j．issn．1003—5060．2015．06．016强降雨激励下松散岩堆路堑边坡稳定性分析袁海平，陈水梅。，朱大勇。，卢坤林h。，韩治勇。，王斌。(1

2、合肥工业大学土木与水利工程学院，安徽合肥230009；2．煤炭资源与安全开采国家重点实验室，江苏徐州221000；3．土木工程结构与材料安徽省重点实验室，安徽合肥230009)摘要：岩堆是我国西南高山峡谷

3、区常见的不良地质体，其存在对高速公路边坡稳定性提出了严峻挑战。文章依托国家高速公路网规划中南北纵线G85高速公路工程，运用数值模拟的方法研究了深厚岩堆拉锚抗滑桩路堑边坡在自然、强降雨和地震状态下的稳定性，对比分析了岩堆体在自然状态、地震状态与强降雨条件下岩堆体边坡变形破坏特征及锚索轴力变化规律。计算结果表明，开挖对岩堆体变形有较大影响，岩堆体自然状态和暴雨状态下，在无任何加固措施时整体稳定性相对较低；增加抗滑桩和锚索加固后，安全系数均有所提高，潜在滑动面整体向下移至抗滑桩下部，加固作用效果显著。研究成果为岩堆路堑边坡工程设计与施工提供了参考依据

4、。关键词：道路工程；岩堆；路堑边坡；强降雨中图分类号：TU457文献标识码：A文章编号：1003—5060(2015)06—0799—05+StabilityanalysisofcuttingslopewithlooserockheapunderstrongrainfallconditionYUANHai—ping’。，CHENShui—mei，ZHUDa-yong，LUKun-lin，HANZhi—yong～，WANGBin'。(1

5、SchoolofCivilandHydraulicEngineering，HefeiUniversityofT

6、echnology，Hefei230009，China；Z．StateKeyLaboratoryofCoalResourcesandSafeMining，Xuzhou221000，China；3．AnhuiKeyLaboratoryofStructureandMaterialsinCivilEngineeringtHefei230009，China)Abstract：Theslopestabilityofhighwayischallengedbyrockheap，whichisacommonadversegeo—logicbodyinChine

7、sesouthwestalpinegorge．InviewofthenationalhighwaynetworkplanningG85North—Southlineofhighwayengineering，thestabilityofcuttingslopewithdeeprockheapandanchoranti—slidepileundernaturalstate，seismicconditionandstrongrainfallconditionwassimulatedthroughnumericalsimulationmethod，an

8、dtherockheapInassstructuretypeofsideslopeandthechangelawofaxialforceofcablewereanalyzedcomparativelyundernaturalstate，seismicconditionandstrongrainfallcondition．Thecalculationresultsindicatethatexcavationhasgreatinfluenceontherockheapmassdeformation，andtheoverallstabilityisr

9、elativelylowundernaturalstateandtherainfallconditionwithoutanyreinforcementmeasures．Whenreinforcedbytheanti-slidepileandtheanchorcable，thesafetycoefficientsincreaseandthepotentialslopeshiftdowntothelowerpartofan—ti—slidepile，andthereinforcementsareeffective．Thestudyprovidesr

10、eferencesforthedesignandconstructionofrockheapcuttingslopeengineering．Keywo