【作者】 韦会强；

【导师】 周健；

【作者基本信息】 同济大学 ， 岩土工程， 2007， 硕士

【摘要】 挡墙是挡墙本身和其后填土相互作用的体系，对其进行研究应该包括挡墙本身的侧压力和其后填土的变形、破坏。传统的研究主要侧重于挡墙本身的侧压力研究，而对其后填土的变形、破坏研究不多。 本文通过模型试验和数值分析，对作用于刚性挡土墙上的水土合力的大小、墙后土体的位移、孔隙水土压力增长与消散规律进行了研究。对于刚性挡墙，采用自制的模型箱，进行渐进破坏模型试验，研究不同的挡墙变位方式对土颗粒位移、水土合力、孔隙水压力的影响。挡墙采用的变位方式为：平移(T)、绕墙顶转动(RT)和绕墙底转动(RB)。作者还用有限差分法法对刚性挡土墙后土体孔压的变化情况进行分析研究，土体采用弹塑性的Mohr-Coulomb本构模型，在土与结构接触面间引入interface单元，研究不同的挡墙变位方式和不同速度下，孔隙水压力的增长与消散。 最后，关于进一步研究的方向进行了简要的讨论。更多还原

【Abstract】 The retaining wall is a system that they influence each other between the retaining wall and the soil behind it, so the research content should include the pressure on the retaining wall and the deformation and rupture of the soil .The people used to pay attention to the research on the pressure on the retaining wall, the study on the deformation and the rupture of the soil is very few.In this dissertation, the author studied such a system: a rigid retaining and it is the saturated sand behind it. By model tests and numerical analysis, the author did the research on the pressure of the retaining walk the soil displacement and the pore pressure of the soil behind the rigid retaining wall .For the rigid retaining wall ,the author used the model box which was devised by himself, to study the pressure of the retaining walk the soil displacement and the pore pressure of the soil behind the rigid retaining wall under various wall-movements modes. The types of wall movement includes translation(T), the rotation around the top of the retaining wall(RT) and rotation around the bottom of the wall(RB). The author also used the limiting difference method to study the pore pressure of the soil behind the retaining wall under different wall-movements modes and velocity.. In the study, a constitutive model of "Mohr-Coulomb" was used. Also, an "interface" element is proposed between the soil and the retaining wall.In the finality, the problems requiring further studies are discussed.更多还原