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ID:36493783
大小:1.55 MB
页数:7页
时间:2019-05-11
《加筋格宾挡墙的结构特性数值分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第39卷,第4期公路工程Vo1.39,No.42014年8月HighwayEngineeringAug.,2014加筋格宾挡墙的结构特性数值分析王祥,黄向京,刘泽(1.湖南交通规划勘察设计院,湖南长沙410008;2.湖南科技大学土木工程学院,湖南湘潭411201)【摘要]以FLAC3D为平台,建立了加筋格宾挡墙数值分析模型,研究了加笳格宾挡墙的土压力、挡墙变形、筋材拉应力等特征参数的分布规律,并分析了加筋间距、格宾箱宽和筋材长度对挡墙的影响。研究表明:加筋格宾挡墙的土压力分布规律与经典土压力理论的计算值有较大差异;直立面墙加筋格宾挡墙上部变形大,下部变形小,整体
2、上呈向I临空侧倾覆;筋材拉应力在筋长方向为非线性分布;随着加筋间距减小,挡墙的侧向变形减小,筋材受到的拉应力减小,但加筋间距分别为0.7、0.8、0.9m时,墙内最大拉应力基本相同。加筋格宾挡墙的格宾箱面墙本身就相当于一座重力式挡土墙。随着格宾箱宽度增加,挡墙变形减小,筋材受到的拉应力也减小。随着筋材长度增加,挡墙侧向变形减小,但当筋长超过0.67倍墙高后,挡墙的侧向变形和筋材最大拉应力不再变化。[关键词】加筋格宾挡土墙;结构特性;筋材拉应力;数值分析[中图分类号]u417.11[文献标识码】A[文章编号]1674—0610(2014)04—0004—06Nume
3、ricalAnalysisontheStructuralFeatureofGabionReinforcedEarthRetainingwallWANGXiang,HUANGXiangjing,LIUZe(1.HunanProvincialCommunicationsPlanning,Survey&DesignInstitute,Changsha,Hunan410008,China;2.SchoolofCivilEngineering,HunanUniversityofScienceandTechnology,Xiangtan,Hunan411201,China)[
4、Abstract]BasedonFLAC如,anumericalmodelofreinforcedgabionretainingwallhasbeenbuilt.thedistributionlowsofitsearthpressure,deformation,reinforcementtensilestresshavebeenstudied。andtheinfluenceofreinforcedspacing,gabionboxwidthandreinforcementlengthtotheretainingwallhavebeenanalyzed.Resear
5、chshowsthat:theearthpressuredistributionruleisdifferenttotheclassicalearthpressuretheorycalculationvalue;thedeformationontheupperofwallisbiggerthanthatonthelower;thetensilestressofgeosyntheticsdistributesnonlinearlyinthebandlongdirection,withthereinforcementspacingdecreases,thelateral
6、deformationofretainingwallisreduced,thetensilestressofreinforcementdecreased,butwhenthedistancearerespectively0.7m,0.8m,0.9m,themaxim【umtensilestressofre.inforcementsisbasicallythesame;thegabionboxwallitselfistheequivalentofagravityretainingwall,andwithgabionboxwidthincreases,thedefor
7、mationofretainingwallandthetensilestressisre.duced.Withtheincreaseofreinforcementlength,thelateraldeflectionofwalldecreases.butwhenthebandlengthismorethan0.67timesofwallheight,thelateraldeformationofretainingwallandreinforcedmaterialmaximumtensilestresschangesnolonger.[Keywords]gabion
8、reinf
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