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1、第7卷第6期铁道科学与工程学报Vol7No62010年12月JOURNALOFRAILWAYSCIENCEANDENGINEERINGDec.2010加筋格宾挡墙破裂面及承载力特性研究*1123王维,黄向京,许桂林,刘泽(1.湖南省交通规划勘察设计院,湖南长沙410008;2.中铁工程设计咨询集团有限公司郑州设计院,河南郑州450052;3.中南大学土木建筑学院,湖南长沙410075)摘要:在加筋格宾挡墙筋材原型观测试验和数值模拟的基础上,对不同加筋规范所采用的破裂面进行了比较分析,提出了改进双折线型潜在破裂面,并通过加筋格宾挡土墙实体工程的现场观测结果,进一步分析了改进双
2、折线型潜在破裂面的优点。结果表明:采用改进双折线型破裂面计算,比公路规范和BS8006规范安全,比铁路规范经济。采用极限平衡法,推导了双折线型破裂面在拉力破坏和粘着破坏时的墙顶部表面通用承载力计算公式,统一了0.3H简化破裂面和朗肯破裂面形式下的承载力计算公式。关键词:加筋格宾挡墙;双绞合六边形钢丝网;改进双折线型破裂面;模型试验;现场监测;承载力特性中图分类号:TU43文献标志码:A文章编号:1672-7029(2010)06-0043-07Studyonthefailuresurfaceandthebearingcapacitycharacterofreinforcedg
3、abionretainingwall1123WANGWei,HUANGXiangjing,XUGuilin,LIUZe(1.HunanProvincialCommunicationsPlanningSurvey&DesignInstitute,Changsha410008,China;2.ChinaRailwayEngineeringConsultantsGroup,ZhengzhouDesignInstitute,Zhengzhou450052,China;3.SchoolofCivilEngineeringandArchitecture,CentralSouthUniversit
4、y,Changsha410075,China)Abstract:Basedontheprototypepreservationandnumericalanalysisofareinforcedgabionretainingwal,lthefailuresurfacesadoptedbydifferentdesignmanualsarecomparedandanalyzedandtheimproveddoublelinesimplifiedfailuresurfacemodelisproposedforreinforcedearthretainingwallwithdouble-twis
5、tedhexagonalsteelwiremesh.Afteranalyzedtheresultsobtainbyafieldtestdoneinareinforcedgabionretainingwal,ltheadvantagesofimproveddoublelinesimplifiedfailuresurfacemodelwereanalyzedfurther.Theresultsshowthatitissafertoadoptthedoublelinesimplifiedfailuresurfaceforcalculationthanthehighwayspecificati
6、onsandBS8006,economicerthantherailwayspecifications.Finally,onthebasisofdoublelinesimplifiedfailuresurface,thebearingcapacityformulaofthetopsurfaceofbackfillbehindreinforcedearthretainingwallundertwofailuremodesisintroducedbythelimitequilibriummethod,whichunifiesthebearingcapacityformulaofthe0.
7、3HsimplifiedfailuresurfaceandthatoftheRankinefailuresurface.Keywords:reinforcedgabionretainingwal;ldouble-twistedhexagonalsteelwiremesh;modeltes;tImproveddoublelinesimplifiedfailuresurface;fieldmonitoring;bearingcapac
