精品文档碱性玫瑰精整理2011年10月2号如需购买碱性玫瑰精，请留下以下联系方式备用电话：0317-78962220317-7896333传真：0317-7727900河北省东光宏浩染料网址：www.honghaochem.com联系人：刘雨桐超大跨度悬索桥隧道锚承载特性的岩石力学综合研究邬爱清1-；彭元诚2-；黄正加1-；朱杰兵1(1.长江科学院水利部岩土力学与工程重点实验室-；湖北武汉430010；2.中交第二公路勘察设计研究院有限公司-；湖北武汉430056)摘要：针对四渡河特大桥宜昌岸隧道锚承载特性问题-；采用基于岩石力学的综合研究方法-；从围岩地质与力学特性、隧道锚1∶12实体模型试验及隧道锚承载特性数值分析等方面-；对隧道锚与围岩岩体变形机制、时效特征及超载安全性等方面开展系统研究。结果表明-；通过岩石力学试验及基于实体模型试验获得的隧道锚围岩弹塑性及流变参数符合实际；在设计水平下-；隧道锚锭围岩变形在mm级水平；隧道锚极限抗拉拔力≥7.6倍设计载荷-；满足锚固安全系数＞4.0的设计要求；实桥隧道锚碇的长期安全系数≥2.6。通过工程实际施工过程中的监测实施-；对研究成果和结论的合理性进行验证。研究技术路线及成果可供山区类似桥梁建设借鉴。关键词：隧道工程；四渡河大桥；隧道锚；承载特性；实体模型试验；岩体试验；数值模拟；隧道锚监测中图分类号：U45文献标识码：A文章编号：1000–6915(2010)03–0433–09ROCKMECHANICSCOMPREHENSIVESTUDYOFBEARINGCAPACITYCHARACTERISTICSOFTUNNELANCHORAGEFORSUPER-LARGESPANSUSPENSIONBRIDGEWUAiqing1-；PENGYuancheng2-；HUANGZhengjia1-；ZHUJiebing1(1.KeyLaboratoryofGeotechnicalMechanicsandEngineeringofMinistryofWaterResources-；YangtzeRiverScientificResearchInstitute-；Wuhan-；Hubei430010-；China；2.SecondHighwayConsultantsCo.-；Ltd.-；ChinaCommunicationsConstructionCo.-；Wuhan-；Hubei430056-；China)Abstract：AccordingtobearingcapacityproblemofatunnelanchorageatYichangsideforSiduhesuper-spansuspensionbridge-；tostudysystematicallythedeformationandfailuremechanism-；therheologicalcharacteristicsandoverloadingcapacitiesofthetunnelanchorageanditssurroundingrockmassbyacomprehensiverockmechanicsresearchmethodareproposed.Theapproachincludedintheresearchconsistsofin-situgeologicalinvestigation-；rockmechanicaltestsinlaboratoryandinthefield-；the1∶12anchoragephysicalmodeltestwiththesamerockmassatsiteoftheactualschemedtunnelanchorage-；andthenumericalsimulationsrelatedtophysicalmodeltestandtheengineeringanalysisofbearingcapacityevaluationsoftheactualtunnelanchorage.Severalconclusionshavebeendrawn.Firstly-；themechanicalpropertiesandtherelevantparametersofthesurroundingrockmassareobtainedcomprehensivelybyrockmechanicaltests；andthephysicalmodeltestsarequitereasonablecomparedtotheactualmonitoringresults.Secondly-；thetotaldeformationoftheactualtunnelanchorageisinthegradeofmmwiththedesigningloadwhichwillbesuppliedbythesuspensionbridge.Thirdly-；thedesignrequirementforthesafetyfactorofthetunnelanchorage-；whichisgreaterthan4.0-；isevaluatedtobesatisfiedbythe1∶12in-situphysicalmodeltestwherethemaximumanti-pullingforceiscarriedoutinthephysicaltest-；andultimatetensilebearingcapacityisgreaterthan7.6timesofthedesignload.Atlast-；thepermanentsafetyfactorofbridgeanchorageisnotlessthan2.6accordingtotherheologicalobservationsinthephysicaltest.Therockmassdeformationandsomerelevantresultshavebeenverifiedthroughmonitoringinprocessofthebridgeconstruction.Inaddition-；thetechnologicallineisanexampleforbridgeconstructioninsomeothersimilarmountainareas.Keywords：tunnellingengineering；Siduhesuspensionbridge；tunnelanchorage；bearingcapacitycharacteristics；anchoragemodeltest；rock...