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ID:34645224
大小:359.63 KB
页数:5页
时间:2019-03-08
《龙滩碾压混凝土室内外抗剪试验结果对比分析》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、文章编号:0559—9342(20()7)04一0054—05龙滩碾压混凝土室内外抗剪试验结果对比分析潘罗生1,王进攻1,王述银2(1.龙滩水电开发有限公司,广西南宁530023;2.长江水利委员会长江科学院,湖北武汉430010)关键词:碾压混凝土;抗剪强度;芯样;原位抗剪;小值法;统计法;龙滩工程摘要:对龙滩大坝碾压混凝土的室内抗剪、现场原位抗剪试验和芯样抗剪试验结果进行了对比分析。室内和现场抗剪试验结果表明,随着层面间歇时间的延长,3种强度等级的碾压混凝土的抗剪强度均下降,尤其是冷缝出现后抗剪强度最低。采用小值平均法和保证率为80%时统计法分析,3种强度等级的碾压
2、混凝土现场原位抗剪试验的.厂’、c’值均能满足设计要求,小值法较统计法的厂值稍高,c’值稍低;分别用小值法和统计法得出的厂,、c’值计算出的抗剪强度差别不大.小值法稍低。除去尺寸效应和龄期的影响后.两种强度等级的芯样抗剪强度均大于设计抗剪强度。Compa血叫卸dAnalysisofInd∞raⅡdoutd∞rTestRe飘dts蛆she盯ResistanceofRCCforLongtaIIRCCD锄PanLuoshen91,WangJingon91,WangShuyin2(1.LongtanHydropowerDevelopmentCo.,Ltd.,NanningGua
3、ngxi530023;2.Yan殍zeRiVerScientificResearchInstituteofChan舀iangWaterResource8Commission,WuhanHubei430010)KeyWords:RCC;shearresistancestrengtll;cores哪ple;insitushe撕ng;minimumavemgemethod;statisticalmethod;bngtanHydmpowerProjectAbstract:Inthispapertheshearingte8tresultsofRCCcaniedoutinlaban
4、dfield,includinglabshearingtest,in—situsheaIingtestwerecomparedandanalyzedtodemonstmtewhethertlleshearingpammetersmeetmedesignrequirementandcommentsweremadetothefactors甜fectingtheshearingtest.Itwasshownbythetestresultsf而mlabandfieldthattIleresistantofthreeofRCCwithdif玷rentdownwith山eshear
5、ingstren殍hgradedesignedstren昏hdroplongerjointinteⅣal,especiallyf斫thecddjoim(theinteⅣalbetween18~20hours),thestren舒hwasinitslowestleVel.Analysiswereperfomedrespectivelybyusingthestatisticmethodwithguamnteedrate80%andMinMethod,“isshownbythethef,and7cofthethreeRCCintheinsitutestcanallmeetth
6、ecompadsonthatpammetersgmdedesignrequirement.However'thevalueoff,isabithigherandthevalueofc’islowerbyusingminmet
7、lodthanbystatisticalmethod。f而mf,and7cobtainedfbmtlletwoHowever,thedifferencebetweentIleshearingresistantstreng山scalculatedmentioneddifferentmethodisnotobvious,thestrengthcalcu
8、latedf南mminmetllodisabitlower.Consideringtheaffectsoft}lesizee任-ectsandconcretetllefbmthecoIeofmetwoRCCwimdⅢbrentdesignedages,8headngstren斟hsampless骶ngtllareaIlhigllertll跚t王ledesignedstrengtll.中盈分类号:Tv313;Tv642.2(267)文献标识码:A速)、层面暴露时间、层间处理方式及施工工艺等。碾压混凝1试验目的土的层间处理方式一般有不处理、铺
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