Theoretical analysis of earth pressure against rigid retaining walls under translation mode
Theoretical analysis of earth pressure against rigid retaining walls under translation mode
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DOI：
10.1016/j.sandf.2016.07.007
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发表时间：
2016-08
影响因子：
3.7
通讯作者：
M. Khosravi;T. Pipatpongsa;J. Takemura
中科院分区：
文献类型：
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作者：
M. Khosravi;T. Pipatpongsa;J. Takemura
挡土墙后土体随挡土墙的运动方式和表面粗糙度的不同而逐渐向滑移面形状复杂的静止土体屈服分离。本文在二维平衡系统中研究了主动平移模式下具有均匀堆载沿水平充填体作用的刚性挡土墙问题。基于Janssen法的精确应力解在直角坐标下进行了推广，并在挡土墙和墙后库仑滑动线的边界条件下进行了验证。因为在杨森法中没有使用屈服条件，所以所提出的解仅仅是静态应力解，而不是静态容许解。建立了新的方程来估计挡土墙后破坏区竖向、水平和剪应力的大小和分布。提出的分析表明，挡土墙后拱效应，因为最大应力没有出现在趾部；但在离挡土墙脚趾有一段距离的地方。提出的配方的结果与全尺寸和实验室规模的实验数据以及现有配方进行了比较。所提出的分析提供了水平主动应力分布、水平主动力在墙处的大小和施加高度的可比近似。
The soil mass behind a retaining wall gradually yields and separates from the stationary soil mass with the complex shape of the slip surface depending on the mode of wall movement and roughness of the wall surface. In this study, the problem of a rigid retaining wall with a uniform surcharge acting along the horizontal backfill under active translation mode is investigated in a two-dimensional system of equilibrium. Exact stress solutions based on Janssen׳s approach are generalized in rectangular coordinates and are validated with boundary conditions on the retaining wall and at the Coulomb slip line behind the wall. Because the yield condition is not used in Janssen׳s approach, the proposed solution is a merely static stress solution, not statically admissible solution. New equations are developed to estimate the magnitude and distribution of vertical, horizontal and shear stresses in the failure zone behind a retaining wall. The proposed analysis indicates the arching effect behind the retaining wall because the maximum stresses do not appeared at the toe; but at some distance away from the toe of the retaining wall. The results of the proposed formulations are compared with both full-scale and laboratory-scale experimental data as well as the existing formulations. The proposed analysis provides comparable approximations for horizontal active stress distribution, the magnitude and the application height of the horizontal active force at the wall.