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首页> 外文期刊>Engineering Structures >Failure mechanisms governing reinforcement length of geogrid reinforced soil retaining walls
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Failure mechanisms governing reinforcement length of geogrid reinforced soil retaining walls

机译：土工格栅加筋土挡土墙支护长度的破坏机理

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Current design practice of reinforced soil retaining walls is based on the limit equilibrium approach. The walls are designed for both external and internal stability criteria. Design reinforcement length should be such that minimum required safety factors are fulfilled for all failure modes. Most agencies require minimum reinforcement length equal to 70 percent of wall height. However, it is not always possible to have enough space behind a wall to accommodate these required reinforcement lengths due to an existing natural rock formation, man-made shoring system, or the presence of another reinforced soil retaining wall. This study was performed to investigate governing failure mode in determining the required minimum reinforcement length and also to investigate the possibility of shortening the specified minimum reinforcement lengths. Effect of different parameters involved in the design of reinforced soil retaining walls on the required minimum reinforcement length and the governing failure mode were studied. Parameters considered included wall height, surcharge, reinforcement vertical spacing, reinforced soil properties, backfill/retained soil properties, and foundation soil properties. Results indicated that both external and internal failure modes can be governing criteria in determining the required minimum reinforcement length depending on the parameters involved for a specific wall. In addition, it may be possible to use reinforcement lengths as low as almost 50 percent of the wall height, instead of 70 percent as required by many agencies around the world. This paper presents the results of parametric studies conducted, including the effect of different parameters on the required minimum reinforcement length and the governing failure criteria.
机译：当前加筋土挡土墙的设计实践是基于极限平衡法的。墙壁的设计符合内部和外部稳定性标准。设计加固长度应确保所有故障模式均满足最低要求的安全系数。大多数代理机构要求的最小钢筋长度等于墙高的70％。然而，由于现有的天然岩石地层，人造的支撑系统或存在另一个加固的土壤挡土墙，在墙的后面并不总是有足够的空间来容纳这些所需的加固长度。进行这项研究是为了研究确定所需最小钢筋长度的控制失效模式，并研究缩短指定最小钢筋长度的可能性。研究了加筋土挡土墙设计中涉及的不同参数对所需最小加筋长度和控制破坏模式的影响。考虑的参数包括墙高，附加费，加筋垂直间距，加筋土壤特性，回填/保留土壤特性和基础土壤特性。结果表明，外部和内部破坏模式均可作为确定所需最小钢筋长度的控制标准，具体取决于特定墙体所涉及的参数。此外，可能使用的补强长度低至壁高的近50％，而不是世界上许多机构要求的70％。本文介绍了进行的参数研究的结果，包括不同参数对所需最小钢筋长度和控制破坏准则的影响。

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