软土路基上路堤填筑方法的对比分析  

Comparative analysis of construction methods of highway embankment on soft soil foundation

作　　者：刘金龙[1] 陈陆望[2] 刘洁群[3] 

机构地区：[1]合肥学院建筑工程系,安徽合肥230022 [2]合肥工业大学资源与环境工程学院,安徽合肥230009 [3]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《合肥工业大学学报（自然科学版）》2008年第2期229-232,236,共5页Journal of Hefei University of Technology：Natural Science

基　　金：合肥学院引进人才启动基金资助项目(RC027)

摘　　要：基于非线性有限元方法,针对路堤一次性填筑和分阶段填筑过程中路基的变形与破坏机理进行了考察。对比分析表明,当路堤填筑至设计高度时,分阶段填筑得到的竖向沉降比一次性填筑的相应值要大,路堤坡趾外的地面隆起变小,路基侧向位移也变小,且一次性填筑过程中的最小安全系数小于分阶段填筑过程中的相应值;因此,分阶段填筑有利于加快路基的沉降和提高路堤的稳定性,建议实际工程尽可能的采用该方法进行施工。Based on nonlinear finite element method, the character of deformation and failure mechanism of embankment with one-off construction and stage construction are comparatively studied. It is shown that the value of vertical settlement becomes lager, the bulge at the toe of embankment becomes less, and the lateral displacement becomes less with stage construction method than the corresponding value of one-off construction method at the end of filling. Moreover, the minimal value of safety factor of embankment with one-off construction method is less than that of stage construction method. Considering the virtues of consolidation degree increased and stability enhanced with stage construction, it is suggested that the embankment filled with stage construction should be preferred as much as possible.

关 键 词：非线性有限元 路堤 软土路基 填筑方法 分阶段填筑 

分 类 号：TU452[建筑科学—岩土工程]