Geosynthetic-reinforced retaining (GRR) walls have been used to support spread footings constructed directly on the reinforced soil mass. This technology eliminates the need for traditional deep foundations, such as piles, to support bridges or buildings. Lateral facing deflection induced by footing loading is one of the key parameters that should be considered for design of GRR walls to support footings. However, there is no well-accepted method available to predict the deflections of GRR walls constructed with flexible facing, especially under footing loading. The objective of this study was to develop a method to estimate the facing lateral deflections of GRR walls under footing loading. To fulfill the above objective, the effect of footing loading on stability of 68 GRR walls (171 loading steps) with wrap-around and modular block facing was investigated. The limit equilibrium method (i.e., the modified Bishop method) was used to calculate the factors of safety of these walls. The calculated and measured results indicated that the GRR walls subjected to footing loading with lower factors of safety had larger lateral facing deflections than those with higher factors of safety. Based on this finding, a data analysis was conducted to establish an exponential relationship between the calculated factor of safety using the modified Bishop method and the maximum lateral facing deflection of the GRR walls under footing loading.

土工合成材料加筋挡土 (GRR) 墙已用于支撑直接在加筋土体上建造的扩展基础。该技术无需使用传统的深基础（例如桩）来支撑桥梁或建筑物。由基础荷载引起的侧向变形是设计 GRR 墙以支撑基础时应考虑的关键参数之一。然而，没有公认的方法可用于预测用柔性饰面建造的 GRR 墙的挠度，尤其是在基脚载荷下。本研究的目的是开发一种方法来估计基础载荷下 GRR 墙的正面侧向挠度。为实现上述目标，研究了基础荷载对 68 面带环绕和模块化砌块饰面的 GRR 墙（171 个加载步骤）稳定性的影响。极限平衡法（即修正的Bishop 法）用于计算这些墙的安全系数。计算和测量结果表明，承受基础载荷的 GRR 墙与安全系数较低的墙相比，其侧向偏转比具有较高安全系数的墙更大。基于这一发现，进行了数据分析，以建立使用修正 Bishop 方法计算出的安全系数与基础载荷下 GRR 墙的最大侧向挠度之间的指数关系。计算和测量结果表明，承受基础载荷且安全系数较低的 GRR 墙比具有较高安全系数的墙具有更大的侧向挠度。基于这一发现，进行了数据分析，以建立使用修正 Bishop 方法计算的安全系数与基脚载荷下 GRR 墙的最大侧向挠度之间的指数关系。计算和测量结果表明，承受基础载荷的 GRR 墙与安全系数较低的墙相比，其侧向偏转比具有较高安全系数的墙更大。基于这一发现，进行了数据分析，以建立使用修正 Bishop 方法计算出的安全系数与基础载荷下 GRR 墙的最大侧向挠度之间的指数关系。