摘要
加筋土挡墙的破坏形式一般为拉断破坏和粘着破坏两种形式。该文通过对粘着破坏形式下的加筋土强度理论的探讨,应用准粘聚力理论和库仑理论,提出了粘着破坏形式下的加筋土挡墙墙背土压力计算公式。研究结果表明:粘着破坏下的加筋土内摩擦角具有了增量;加筋土挡墙墙背侧向土压力比经典土压力和变系数法都小;加筋土挡墙侧向土压力都随拉筋垂直间距增加而增加;粘着破坏法计算得到的加筋土挡墙侧向土压力比实测值大。
Tensile failure and adhesion failure are general failure modes of reinforced earth retaining wall,through the discussion of strength theory of reinforced earth for adhesion failure modes,based on the cohesive force theory and Coulomb′s earth pressure theory,adhesion failure theoretical formulae of lateral soil pressure for reinforced earth retaining wall are put forward.The studied results show： angle of internal friction has increment for the adhesion failure;lateral soil pressure values using proposed formula are smaller than that using classical earth pressure theories and variable coefficient method of earth pressure,and will increase with increasing of the vertical distance of the reinforcement,for adhesion failure,the theoretical values for adhesion failure are bigger than tested values.
出处
《勘察科学技术》
2010年第4期11-13,共3页
Site Investigation Science and Technology
关键词
强度模型
侧向土压力
竖向间距
粘着破坏
strength model
lateral soil pressure
vertical distance
adhesion failure
