钱塘江防洪堤地震液化及稳定分析
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摘要
本文针对钱塘江防洪堤堤身和地基均为松散的粉砂土在地震作用下易液化的特点 ,通过动三轴试验和共振柱试验研究了粉砂土的液化特性 ,并以Biot动力固结方程为基础、同时考虑土体非线性性质和土体阻尼效应 ,分析研制了堤坝动力响应及稳定的二维平面应变排水有效应力动力分析程序 ,采用国内两种典型的Ⅶ度地震曲线 ,对钱塘江防洪堤工程的三种典型工况进行了液化稳定计算 ,综合分析研究了钱塘江防洪堤工程的抗震性能
The Liquefaction characteristics of loose silt in embankment of Qiantang River are studied by dynamic triaxial test and vibration column test.Based on Biot's dynamic consolidation theory,the calculation programs for dynamic response and effective stress analysis are developed, in consideration of the non\|linear and damping effect of soil.The stability analyses of the embankment under the conditions of two types of Ⅶ degree earthquake and three typical levels are conducted.The calculation results verify that the embankment is safe.
The Liquefaction characteristics of loose silt in embankment of Qiantang River are studied by dynamic triaxial test and vibration column test.Based on Biot's dynamic consolidation theory,the calculation programs for dynamic response and effective stress analysis are developed, in consideration of the non\|linear and damping effect of soil.The stability analyses of the embankment under the conditions of two types of Ⅶ degree earthquake and three typical levels are conducted.The calculation results verify that the embankment is safe.
引文
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[1 0 ] XingHong bo,FinnWDLian .SeismicResponseAnalysisofthe 1 976DashihetailingsDam [J].ChineseJournalofGeotechnicalEngineering ,1 996,1 8( 4) :4 8-56
[2 ] XuZhiying ,ShenZhujiang .EarthquakeResponseandLiquefactionAnalysisofHighTailingDambyVariousMethods [J].JournalofHydraulicEngineering,1 983,( 5) :30 -39.(inChinese) .
[3] XuZhiying ,ShenZhujiang.LiquefactionandStabilityAnalysisofaHighTailingDamunderEarthquakeExcia tion [J].ChineseJournalofGeotechnicalEngineering ,1 981 ,3 ( 4) :2 2 -31 .
[4 ] SeedHB ,LeeKL ,IdrissIM&MakdisiFI.DynamicanalysisoftheslideintheLowerSanFernandodamduringtheearthquakeofFeb 9,1 971 [J].Proc.ASCE ,No .Gt91 975.
[5] SunMinquan ,GuGanchen .Embankmentslopefailureduetoearthquakeinducedliquefaction [J].JournalofHydraulicEngineering,1 994 ,( 4) :63-68.(inChinese) .
[6] SunRui,YuanXiaoming ,ShiZhaoji.2 Dfiniteelementanalysisofeffectivestressofseismicliquefaction [J].WorldInformationonEarthquakeEngineering,1 988,1 4 ( 1 ) :2 1 -2 7.(inChinese) .
[7] ChenGuoxing ,XieJunfei,ZhangKexu.Reviewontheearthquakedamageandaseimicanalysisofearthdams[J].WorldInformationonEarthquakeEngineering,1 994 ,( 3) :2 4 -33.(inChinese) .
[8] XieJunfei,ShiZhaoji,YhuShousong ,FengWangling.Hazardanalysisofliquefaction [J].EarthquakeEngi neeringandEngineeringVibration,1 988,8( 1 ) :61 -77.(inChinese) .
[9] WuShiming .Dynamicdeformationbehavioursofsoilsandtheirmeasurements [J].JournalofHydraulicEngi neering,1 987,( 1 2 ) :33-4 7.(inChinese) .
[1 0 ] XingHong bo,FinnWDLian .SeismicResponseAnalysisofthe 1 976DashihetailingsDam [J].ChineseJournalofGeotechnicalEngineering ,1 996,1 8( 4) :4 8-56
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