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1、第14卷01期南水北调与水利科技Vol.14No.012016年2月South2to2NorthWaterTransfersandWaterScience&TechnologyFeb.2016蓄水条件下某水电工程坝址区变形体变形与稳定性研究11,211马磊,李满意,冯樊,史玲(1.外生成矿与矿山环境重庆市重点实验室(重庆地质矿产研究院),重庆400042;2.地质灾害防治与地质环境保护国家重点实验室(成都理工大学),成都610059)摘要:库岸边坡在蓄水后的变形和稳定问题一直是水电工程的主要问题,尤其是坝址区库岸边坡稳定性对水电工程的正常运营起着至关重要的控制
2、作用。针对黄河上游某水电站库岸一变形体边坡,在对该变形体边坡基本特征分析的基础上,采用数值计算的手段,对黄河上游某水电站坝址区变形体在自然及蓄水条件下稳定性进行对比分析。结果表明:蓄水后变形体边坡的变形具有明显的分区特征,且坡体的变形受影响较大。同时,利用强度折减法对变形体的稳定性系数进行了计算,变形体的稳定性较好,考虑到坡体局部稳定性较差,可能会产生局部失稳破坏,因此,需采取支护措施保证该处坝址区变形体在运营期间的长期稳定性。关键词:库岸边坡;坝址区;变形体;变形;稳定性中图分类号:P642文献标识码:A文章编号:167221683(2016)0012011
3、9204DeformationunderstorageconditionsandstabilityofahydroelectricdamsiteareaofdeformationMAlei1,LIMan2yi1,2,FENGFan1,SHILing1(1.ChongqingKeyLaboratoryofExogenicMineralizationandMineEnvironment(ChongqingInstituteofGeologyandMineralResources),Chongqing400042,China;2.StateKeyLaboratory
4、ofGeoharzardsPreventionandGeoenvironmentProtection(ChengduUniversityofTechnology),Chengdu610059,China)Abstract:BankSlopedeformationandstabilityinstorageafterthehydropowerprojecthasbeenamajorproblem,especiallyinslopestabilityRes2ervoirDamAreaofthenormaloperationofthehydropowerproject
5、controlplaysavitalrole.TheupperreachesoftheYellowRiverHydropowerReservoirforadeformationofaslope,slopedeformationbasedonthebasiccharacteristicsoftheanalysis,theuseofthemeansofnumericalcal2culation,undernaturalconditions,andimpoundmentofahydropowerdamontheupperreachesoftheYellowRiver
6、areainthedeformablebodystabilitywereanalyzed.Theresultsshowthat:Afterimpoundingdeformationslopedeformationcharacteristicshaveobviouszoningandde2formedbodygreatlyaffected.Atthesametime,theuseofstrengthreductionfactorforthestabilityofdeformablebodieswerecalculated,betterstabilitydefor
7、mablebody,takingintoaccountthelocalslopestabilityispoor,maycauselocalbucklingdamage,therefore,needtotakesupportmeasuresensurethedamareawherethedeformablebodyinlong2termstabilityduringoperations.Keywords:bankslopes;damarea;deformablebody;deformation;stability黄河上游某水电站坝址区发育一变形体。该变形体具面形
8、态呈不规则状,地形总体坡度约40b,后
