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《基于坪头水电站岩溶砂化细晶白云岩的特性及围岩分类 坪头水电站岩溶砂化细晶白云岩的特性及围岩分类 坪头水电站岩溶砂化细晶白云岩的特性及围岩分类》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、第34卷第5期水利水电科技进展2014年9月Vol.34No.5AdvancesinScienceandTechnologyofWaterResourcesSep.2014DOI:10.3880/j.issn.10067647.2014.05.009坪头水电站岩溶砂化细晶白云岩的特性及围岩分类1,23田启文,岳朝林(1.中国地质大学(武汉)环境学院,湖北武汉摇430074;2.中国电建集团成都勘测设计研究院有限公司,四川成都摇610072;3.黄河勘测规划设计有限公司,河南郑州摇450003)摘要:为了能及时准确地对坪头水电站引水隧洞后段及厂址区内各水工建筑物洞室开挖揭示的围岩细晶白
2、云岩进行围岩类别的确定,为工程设计提供科学合理的地质依据,在充分调查该区水文地质条件及岩溶发育特征和认识细晶白云岩岩溶砂化现象形成机制的基础上,通过大量的岩石磨片鉴定试验和物理力学性质试验,全面细致地查明了围岩细晶白云岩的物质组成及其在不同岩溶砂化情况下的物理力学特性。依据国家相关规程规范,结合各洞室实际开挖揭示情况和试验结果,对该区内岩体进行了围岩工程地质分类,总结出不同岩溶砂化细晶白云岩的围岩类别的特征及其综合评分情况,并对该区确定的芋类、郁类和吁类不同类别的围岩,有针对性地采取相应的工程处理措施,从而确保了各水工建筑物洞室的围岩稳定和安全运行。关键词:细晶白云岩;溶蚀;砂化;围
3、岩分类;坪头水电站+中图分类号:P642;P588.245摇摇文献标志码:A摇摇摇文章编号:10067647(2014)05004505Characteristicsofkarstsandedfine鄄crystallinedolomiteandwallrockclassificationforPingtouHydropower1,23Station//TIANQiwen,YUEChaolin(1.EnvironmentalFaculty,ChinaUniversityofGeosciences,Wuhan430074,Chian;2.PowerchinaChengduEnginee
4、ringCorporationLimited,Chengdu610072,China;3.YellowRiverEngineeringConsultingCo.,Ltd.,Zhengzhou450003,China)Abstract:ThehydrologicalandkarstificationconditionsatthePingtouHydropowerStationwereinvestigatedaimingtoidentifytheclassificationofthefine鄄crystallinedolomiteofthewallrocksattheendofthedi
5、versiontunnelandhydraulicstructurechamberforgeologicalbasisofthegeologicalengineeringdesign.Furthermore,themechanismofthesandedfine鄄crystallinedolomiteduetotheintensekarstificationandcorrosioneffectwasobtained.Basedonalargequantityofrockssectionsexperimentsforidentificationandphysicalproperty,m
6、aterialcomposition,physicalandmechanicalpropertiesofthewallrocksofdifferentkarstcorrosionextentwerefullysurveyed.Inaccordancewiththenationalstandards,combinedwithexperimentalresultsandactualconditionsintheexcavationprocessofcavechambers,engineeringgeologicalclassificationsandcategoriesofthewall
7、rocksweredeterminedby芋,郁and吁,whichcouldserveasfocusedengineeringmeasurementsonthedifferentcategories,respectively,tomaintainthestabilityandsafefunctioningofwallrockofthehydraulicstructures.Keywords:fine鄄crystallinedolomite;karst;s
