Canadian Geotechnical Journal, Ahead of Print.
Counterweight retaining walls (CRWs) are a variant of gravity-retaining walls that feature a pressure relief platform (RP) on the backfill side to reduce total earth pressure, offering a cost-effective option compared to traditional forms. However, the intricate interactions between CRWs and backfill, coupled with the lack of clear design guidelines, have restricted their use. This study examines the behavior of CRWs in translation mode using three different centrifuge model tests, each with varying fill heights. Observations show a slightly concave slip surface through the wall heel and a nearly planar slip surface extending from the edge of the RP to the back of the wall in an active limit state. Backfill movement can be classified into translation, sliding, and stable zones. Earth pressure distribution on the upper wall follows a trapezoidal pattern, whereas the pressure on the lower wall exhibits a triangular distribution. Earth pressure on the RP is approximately linear, peaking near the RP’s edge. Introducing a friction angle mobilization factor for the potential first slip surface improves accuracy in calculating earth pressure. The tests were replicated to validate the analytical model for earth pressure calculations, using the adaptive finite-element limit analysis method.

中文翻译：

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平移模式下配重挡土墙离心机及分析建模

加拿大岩土工程杂志，印刷前。
配重挡土墙 (CRW) 是重力挡土墙的一种变体，在回填侧设有泄压平台 (RP)，以减少总土压力，与传统形式相比，提供了一种经济高效的选择。然而，CRW 和回填之间复杂的相互作用，加上缺乏明确的设计指南，限制了它们的使用。本研究使用三种不同的离心机模型测试（每种测试具有不同的填充高度）检查平移模式下 CRW 的行为。观察显示，在活动极限状态下，穿过墙跟的略微凹形的滑动面和从 RP 边缘延伸到墙后部的近乎平坦的滑动面。回填运动可分为平移区、滑动区和稳定区。上壁土压力分布呈梯形分布，而下壁土压力呈三角形分布。 RP 上的土压力近似呈线性，在 RP 边缘附近达到峰值。为潜在的第一滑动面引入摩擦角动员因子可提高计算土压力的准确性。使用自适应有限元极限分析方法重复测试以验证土压力计算的分析模型。