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1、第38卷第6期合肥工業(yè)大學學報(自然科學版)Vo1.38No.62015年6月JOURNALOFHEFEIUNIVERSITYOFTECHNOLOGYJun.2015doi:10.3969/j.issn.1003—5060.2015.06.016強降雨激勵下松散巖堆路塹邊坡穩(wěn)定性分析袁海平,陳水梅。,朱大勇。,盧坤林h。,韓治勇。,王斌。(1
2、合肥工業(yè)大學土木與水利工程學院,安徽合肥230009;2.煤炭資源與安全開采國家重點實驗室,江蘇徐州221000;3.土木工程結構與材料安徽省重點實驗室,安徽合肥230009)摘要:巖堆是我國西南高山峽谷
3、區(qū)常見的不良地質體,其存在對高速公路邊坡穩(wěn)定性提出了嚴峻挑戰(zhàn)。文章依托國家高速公路網規(guī)劃中南北縱線G85高速公路工程,運用數(shù)值模擬的方法研究了深厚巖堆拉錨抗滑樁路塹邊坡在自然、強降雨和地震狀態(tài)下的穩(wěn)定性,對比分析了巖堆體在自然狀態(tài)、地震狀態(tài)與強降雨條件下巖堆體邊坡變形破壞特征及錨索軸力變化規(guī)律。計算結果表明,開挖對巖堆體變形有較大影響,巖堆體自然狀態(tài)和暴雨狀態(tài)下,在無任何加固措施時整體穩(wěn)定性相對較低;增加抗滑樁和錨索加固后,安全系數(shù)均有所提高,潛在滑動面整體向下移至抗滑樁下部,加固作用效果顯著。研究成果為巖堆路塹邊坡工程設計與施工提供了參考依據(jù)
4、。關鍵詞:道路工程;巖堆;路塹邊坡;強降雨中圖分類號:TU457文獻標識碼:A文章編號: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