加筋土挡墙滑动破裂面的大型模型试验

通过对加筋土模型挡墙加载破坏现象的观察和破坏后裂缝的逐层剖析,提出了加筋土挡墙新的破裂面形式,认为具有上覆荷载的加筋土结构应存在两组潜在的滑动破裂面,它们都属折线形复合式滑裂面,其下部倾斜部分均为朗金破裂面,而上部分别为过均布荷载中心及过承载板之后加筋体拉裂区后部界面的竖直平面.它们比传统的0.3H法及朗金破裂面更具有普遍性.

Large model experiment on sliding rupture of reinforced earth retaining wall

Based on the analysis about the each layer's cracks of the reinforced earth retaining walls which are destroyed under the surcharge load,a new kind of rupture form is put forward,it is considered that there are two group potential ruptures in the reinforced earth retaining walls under the surcharge load.They are both belong to the compound rupture which is the fold line,its lower part is the Rankine's rupture,and the higher part is the vertical plane.One of the two vertical plane passes through the center of the distribute load,and another passes through the behind boundary of the pulling crack zone which locates on behind of the loading plate.They are more common than the traditional rupture about the 0.3H method or Ranking's rupture.7 figs,6 refs.