In this pioneering study, the performance of an eccentrically loaded strip footing on geocell-reinforced sand was assessed with instrumented laboratory model tests in terms of pressure-settlement response, surface displacement profiles, failure mechanisms and ultimate bearing capacity considering load eccentricity, geocell height, geocell material stiffness and the relative density of the soil. The results indicated that strip footings on the geocell-reinforced sand outperformed those on unreinforced soils, with up to a 6.5-fold increase in the bearing capacity and significant improvements in the initial slope of the pressure-settlement curve. Furthermore, the strip footing under centric loading on the geocell-reinforced loose and dense sand exhibited either only punching or local shear failure while load eccentricity on the strip footing could lead to the shear failures including punching, local and general. In this research, both a design chart for predicting failure modes of geocell-reinforced strip footings and a new interpretation method to evaluate ultimate bearing capacity were proposed. Increasing the relative density of the soil and material stiffness enhanced the ultimate bearing capacity of geocell-reinforced strip footings under both centric and eccentric loading conditions, with stiffer materials resulting up to 25% increase. However, increased geocell height had no significant impact on bearing capacity.

在这项开创性的研究中，通过仪器实验室模型测试评估了土工格室加固砂上偏心加载条形基础的性能，包括压力沉降响应、表面位移剖面、失效机制和极限承载力，考虑了载荷偏心、土工格室高度、土工格室材料的刚度和土壤的相对密度。结果表明，土工格室加筋砂上的条形基础的性能优于未加筋土上的条形基础，其承载能力提高了 6.5 倍，并且压力沉降曲线的初始斜率显着改善。此外，在土工格室加固的松散和密砂上的中心载荷下，条形基础仅表现出冲切破坏或局部剪切破坏，而条形基础上的载荷偏心可能导致剪切破坏，包括冲切破坏、局部剪切破坏和一般剪切破坏。在这项研究中，提出了预测土工格室加固条形基础破坏模式的设计图和评估极限承载力的新解释方法。增加土壤的相对密度和材料刚度可提高土工格室加固条形基础在中心和偏心载荷条件下的极限承载能力，较硬的材料可提高高达 25%。然而，增加土工格室高度对承载力没有显着影响。