资源描述：
《水平推力作用下抗滑桩间土拱效应影响因素的数值分析》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42卷第7期中南大学学报(自然科学版)Vol.42No.72011年 7月JournalofCentralSouthUniversity(Science and Technology)July2011水平推力作用下抗滑桩间土拱效应影响因素的数值分析1, 2334刘钦，李地元，刘志祥，刘静(1.北京科技大学土木与环境工程学院，北京，100083；2.山东黄金集团三山岛金矿，山东莱州，261442；3.中南大学资源与安全工程学院，湖南长沙，410083；4.中南大学土木工程学院，湖南长沙，410075) 3D 摘要：利用FLAC软件对抗滑桩后土体的
2、应力拱产生过程和形成机理进行三维数值分析，并通过一系列的对比计算，研究桩间距、土体性质(包括土体的内摩擦角、黏聚力、弹性模量、泊松比、膨胀角)以及桩土接触面性质等因素对土拱效应的影响。研究结果表明：随着抗滑桩桩间距的增大，土拱范围变小，土拱形状也由拱形发展到扁平抛物线形，桩的荷载分担比降低。土体内摩擦角、土体黏聚力以及桩土之间的相对弹性模量对土拱效应的影响呈正相长关系，而土体的泊松比对桩后土拱范围的影响呈反比关系，土体的膨胀角对土拱效应影响不太明显；随着桩土接触面的粗糙程度增加，桩后土拱的范围增大，土拱效应也越显著。关键词：水平推力；土拱效应；抗
3、滑桩；应力拱；桩土相互作用中图分类号：TU473 文献标志码：A文章编号：1672−7207(2011)07−2071−07Numericalanalysis ofinfluence factors on soil arching effect between antisliding piles under horizontal pushingloads1,2334LIUQin ,LIDiyuan ,LIUZhixiang ,LIUJing (1.SchoolofCivilandEnvironmentEngineering,Universityo
4、fScience &TechnologyBeijing,Beijing100083,China;2.SanshandaoGoldMine,ShandongGold Group Co.Ltd.,Laizhou 261442,China;3.SchoolofResourcesand SafetyEngineering,CentralSouthUniversity,Changsha 410083,China;4.SchoolofCivilEngineering,CentralSouth University,Changsha410075,China)3
5、D Abstract:Through 3Dnumericalanalysis ofthearchingeffectbetweenantislidepilesandsoilsbyFLACsoftware,theprocessandthemechanismofstressarchingeffectin thesoilwerestudied.Byaseriesofcalculationsand comparisons, theinfluencefactors onthesoilarchingeffectweredetermined.Forinstanc
6、e,thespaceofpiles, the mechanicalpropertiesofsoil(such as internalfrictionalangle,cohesion,elastic modulus,Poison’s ratioanddilation angle ofsoil)and the interface properties between pilesand soils were analyzed in detail.The resultsshowthatthe soilarchzone willbecome smallan
7、dthearchshapewillchangefromarchedtoparabolawiththeincreaseofpilespaces.The internalfriction angle,thecohesion andthe relative elastic modulus betweenpilesandsoilplaya positive role in soilarchingeffects,butthe Poisson’s ratioplays a negative role.The sheardilation angle hasno
8、conspicuous effectonthesoilarching.Besides,thesoilarch zone willenla
