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ID:35133479
大小:1.17 MB
页数:48页
时间:2019-03-19
《基于膨胀土滑坡抗滑桩设计与施工》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、西南交通大学硕士学位论文膨胀土滑坡抗滑桩设计与施工姓名:杨云飞申请学位级别:硕士专业:岩土工程指导教师:谢强;付代正20030401西南交通大学硕士研究生学位论文第1页摘要l、本文主要研究膨胀土滑坡的抗滑桩整治,介绍了膨胀土的工程特性、抗滑桩的应用与发展情况、抗滑桩的设计步骤和使用条件。结合西安一安康铁路安康东编组站膨胀±滑坡的抗滑桩防治实例,建立了滑坡和抗滑桩的简化力学模型,分析了膨胀土地区产生滑坡的原因和抗滑桩的作用机理。利用极限平衡理论,采用传递系数法,计算膨胀土滑坡推力和桩前剩余抗滑力。采用悬臂桩计算法,将抗滑桩分为受荷段和锚固段分别计算。阐述了膨胀土滑坡抗滑桩设计中计算参数取
2、得的途径、计算方法和计算步骤,总结出具体的施工工艺措施、施工注意事项,并进行了工后监测值与理论值的比较,分析了两者的误差原因。应用结果表明:桩顶位移工后监测值1.6cm与计算值1.93cm基本吻合,说明针对膨胀土滑坡抗滑桩的设计是成功的,所采取的计算方法与参数取值途径合理,误差原因主要为桩正面计算宽度没有充分反映桩土的共同作用和桩间土拱作用、未考虑桩与土体间的侧向摩阻力和桩护壁钢筋混凝土的作用。关键词:膨胀土滑坡:滑坡推力:抗滑桩;悬臂桩计算法;施工与监测西南交通大学硕士研究生学位论文第1
3、页AbstractThisarticleaimstostudypreventionandcure
4、ofswellingsoillandslidewithanti—s!idepile.Engineeringcharacteristicsofswellingsoil,applicationanddevelopmentstateofanti—slidepile,designprocedureandapplyingconditionareallintroduced.FortheregulationofswellingsoillandslideofAnkangDongbianzuStationinXi’an—AnkangRailway,simplifiedmechanicalmodelofl
5、andslideandanti—slidepileiscreated,thenfeIrmationcausesofswellingSOillandslideandmechanismofactionofanti-slidepileareanalyzedByadoptinglimitingequilibriumtheoryandtransportcoefficientmethod,landslidepushingforceandresidualanti—slideforcebeforepilearecalculated.Duringthecalculationofanti—slidepil
6、ewithcantileverpilecalculatingmethod,anti—slidepileisseparatedintoload—bearingsectionandanchoringsection.Thisarticleilluminatesacquiringapproachofcalculatingparameters,calculatingmethodandsteps,andsummarizesconcreteconstructioncraftSandmattersneedattention,Meanwhile,throughpost-constructionmonit
7、oring,monitoringvalueiscomparedwiththeoreticalvalue,thenerrorcausesbetweenthemareanalyzed.Applyingresultsindicate:monitoringvalue(1.63cm)ofdisplacementofpilecapisveryclosetotheoreticalvalue(1.93cm),whichprovesthesuccessofanti—slidepiledesignandverifiestherationalityofcalculatingmethodandparamete
8、racquiringmethod.Becausedesignfrontpilewidthcannotreflectactionsofpile—sollcompositeandsoilarchbetweenpilesroundlyandsidefrictionforcebetweenpileandsoilandactionreinforcedconcreteofpileprotectionwallarenotconsidered,errorbet
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