中文摘要：

采用FLAC3D软件,建立了抗滑桩结构工程中摩擦拱、端承拱和联合拱3种数值模型。对比研究3种拱在形成发育、拱强度影响因素及规律等方面的异同,探讨了两单独拱的联合机制。结果表明,联合拱发育以摩擦拱形成为始点、以端承拱破坏为终点,两单独拱并存且各有明显的主导区。联合拱的分布区域、极限承载力和塑性区分布均可近似为两单独拱情况的叠加,且端承拱在其中占较大比例。不同影响因素对同种拱的影响性质及影响程度均存在差异,同一影响因素对不同拱的影响性质一致但影响程度不同。联合拱的分拆和两单独拱的联合,提供了研究土拱效应的新路径,有利于认识的深化和细化。

英文摘要：

Numerical models of frictional arch,end bearing arch and united arch of anti-slide pile structures are established with FLAC3D.Differences and similarities between three arches about formation,development and law of effect factors are researched comparatively,as well as the combination mechanism of each single one.The results show that the united arch’s development starts with the frictional arch’s forming and ends with the end bearing arch’s breaking.And during all the progresses,each single arch exists and occupies some dominant areas severally.The united arch’s distribution,limit capacity and plasticity zone are almost made up of the two single arches’.Different factors have different influences on both quality and quantity of the same arch,while the same factor has different influences on different arches only quantitatively.So a new method which can help us come to understand it much better is put forward by separating the united arch and combining the two single ones.