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时间:2019-05-13
《隘口沥青混凝土心墙堆石坝岩溶坝基稳定分析及处理研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第25卷增2岩石力学与工程学报Vol.25Supp.22006年10月ChineseJournalofRockMechanicsandEngineeringOct.,2006隘口沥青混凝土心墙堆石坝岩溶坝基稳定分析及处理研究方朝阳,代礼红,段亚辉(武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072)摘要:研究岩溶坝基岩体稳定性评价方法和坝基处理措施,灌浆是一种可靠和有效提高地基防渗性能和地基稳定性的方法。根据隘口工程特点,确定基础灌浆处理方案,对不同岩溶分布情况下坝基岩体的稳定性进行分析比较,指出要保证沥青混凝土心墙的稳定和安全,必须对基础进行加固处理。根据计
2、算结果确定不同深度坝基岩溶的处理方式:固结灌浆孔按3序逐渐加密加深,I序孔孔距12m,孔深13~36m,河床坝基处深36m,坝趾、坝踵和坝肩处13m;II序孔孔距6m,孔深13~21m,河床坝轴线处深21m,坝趾、坝踵及坝肩处深13m;III序孔孔距3m,孔深均为13m。对处理后的坝基岩体稳定性进行分析比较,计算分析表明,经灌浆处理后,沥青混凝土心墙的工作性状满足工程要求,基础处理方案是可行的。关键词:水利工程;岩溶;灌浆法;强度储备法;沥青混凝土心墙;堆石坝中图分类号:TV31文献标识码:A文章编号:1000–6915(2006)增2–3802–07STUDYONKARS
3、TFOUNDATIONSTABILITYANDTREATMENTMEASUREMENTSFORAIKOUASPHALTCONCRETECOREROCKFILLDAMFANGChaoyang,DAILihong,DUANYahui(StateKeyLaboratoryofWaterResourcesandHydropowerEngineeringScience,WuhanUniversity,Wuhan,Hubei430072,China)Abstract:Evaluationmethodoffoundationrockstabilityandtreatmentmeasure
4、mentsinkarstareasisstudied.Groutingisakindofreliableandeffectivemethodtoimproveanti-seepagecapacityandstabilityoffoundation.OnaccountofcharacteristicofAikou,foundationgroutingtreatmentschemeisdetermined.Thestabilityoffoundationrockwithdifferentkarstdistributionsisanalyzedandcompared.Toensu
5、reasphaltconcretecore′sstabilityandsafety,thedamfoundationmustbereinforced.Basedoncalculations,differenttreatmentmeasurementstodifferentdepthkarstfoundationsaredeterminedasfollows:3groupsofconsolidationgroutingholesshouldbearranged,thedistancebeweentheadjacentgroupsissmallerandthedepthofea
6、chgroupisdeeper,groupIholedistanceis12m,depth13–36m(depthofriverbedholeis36m,ofdamtoe,heelandabutmentis13m),groupholeIIdistanceis6m,depth13–21m(depthofriverbedholeis21m,ofdamtoe,heelandabutmentis13m,groupholeIIIdistanceis3m,depth13m.Thestabilityofthetreateddamfoundationiscalculatedandcompa
7、red,evenbigcave(beyond50mtodamfoundation)wereexisted,thesafetyofthetreatedfoundationcanbeensured.Itisprovedthat,withgroutingtreatment,workstatesofasphaltconcretecoremeettherequestofengineering,andthetreatmentschemesarefeasibleandreliable.Keywords:hydraulicengi
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