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时间:2020-03-27
《RB位移模式下黏性土非极限土压力研究.pdf》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31卷第9期2014年9月公路交通科技JournalofHighwayandTransportationResearchandDevelopmentV01.3lNo.9Sep.2014doi:10.3969/j.issn.1002—0268.2014.09.004RB位移模式下黏性土非极限土压力研究柯才桐1,陈奕柏2,高洪波2,曹雄2(1.深圳市勘察测绘院海南分院,海南海口570228;2.海南大学土木建筑工程学院,海南海口570228)摘要:针对经典朗肯与库仑土压力理论的适用范围较小且未能考虑挡墙位移对土压力的影响这一事实。根据已有文献对准主动状态下
2、土体摩擦角、黏聚力发挥值与位移关系的研究,采用位移有效面积比方法将该关系量化至绕墙底转动位移模式挡墙,在此基础上结合斜向层分析法推导了考虑填土的黏聚力、墙土闻黏着力、均布超载作用等条件下的非极限主动土压力合力及其作用点位置、土压力分布计算式。相应简化条件下,该公式能够简化为朗肯、库仑理论计算式。算例分析结果表明:理论计算值与试验实测数据基本吻合,初步获得了绕墙底转动位移模式下黏性土非极限土压力随位移变化的规律。关键词:道路工程;档土墙;钭向层分析法;准主动土压力;绕墙底转动位移模式;非极限状态中图分类号:TU432文献标识码:A文章编号:1002—026
3、8(2014)09—0017—07ResearchofNon-IimitEarthPressureofCohesiveSoilwithModeofWalIRotationaboutBaseKECai—ton91,CHENYi-b02,GAOHong—b02,CAOXiong‘(1.ShenzhenGeoteehnicalInvestigationandSurveyingInstitute,HaikouHainan570228;2.SchoolofCivilEngineeringandArchitecture,HainanUniversity,HmkouH
4、ainan570228,China)Abstract:TocopewiththefactthatclassicRankineandCoulombearthpressuretheorycannotconsidertheeffectsofwallmovementonearthpressureandthescopeofapplicationisrelativelylimited,basedonthestudyoftherelationshipofthesoftfrictionanglewithcohesionforceanddisplacementofrigi
5、dretainingwallunderquasiactivestateofferedbyavailableliteratures,themethodofeffectivearearatioofwallmovementisusedtoquantifytherelationshiptoretainingwallundermovementmodeofrotationaboutbase.Basedonthis,obliquelayeranalysismethodisusedtoderivetheformulaofactiveearthpressuredistri
6、bution,resultantforceanditsapplicationpositionunderunlimitedstatewhichconsidersthecohesionforceofbackfill,theadhesiveforceoninterfaceofretainingwall,andtheuniformlydistributedload.Undercorrespondingsimplifiedconditions.thisformulacanbesimplifiedtoRankine’sandCoulumb’Sformulas.The
7、resultofexampleanalysisshowsthatthecalculatedandmeasuredearthpressureessentiallymatch,thechangeregulationofnon-limitearthpressureundermovementmodeofrotationaboutbasewithdisplacementisprimarilyobtained.Keywords:roadengineering;retainingwall;obliquelayeranalysismethod;quasiactiveea
8、rthpressure;modeofrotationaboutbase;non—
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