Centrifuge testing of both single pile and multiple long-pile groups was conducted using saturated silt soil to investigate the distinct response of piles under adjacent surcharge loads. The behavior of the piles in the soil was also determined using 3-dimensional (3D) numerical analysis. Through the verified model parameters, pile responses were explored from different surcharge loads and distances, with the effect of soil properties investigated in sequence. Results from centrifuge testing and numerical modeling indicate that the four pile foundations underwent different lateral displacements from bending moments due to the distinct soil deformation under consistent surcharge loading. Despite the lateral displacement of the pile cap, its incline also significantly affected the lateral displacement of the overlain pier. The settlement limit of the pile cap was also found to be the most reliable indicator of the pier’s current state compared to the lateral displacement and incline of the pile cap. For the single slit layer, each of the pile caps was found to bend toward the surcharge load, with all bending moments rotating in one direction. This is unique to those of double silt layers, which were found significantly affected by soil non-uniformity.

使用饱和淤泥土对单桩和多桩长桩组进行了离心测试，以研究相邻附加荷载作用下桩的不同响应。还使用3维（3D）数值分析确定了桩在土壤中的行为。通过验证的模型参数，从不同的附加荷载和距离探索桩的响应，并按顺序研究土壤特性的影响。离心机测试和数值模拟的结果表明，在恒定的附加荷载作用下，由于明显的土壤变形，四个桩基础承受了弯矩的横向位移。尽管桩帽发生了横向位移，但其倾斜度也显着影响了覆岩墩的横向位移。与桩帽的侧向位移和倾斜度相比，桩帽的沉降极限也被认为是码头当前状态的最可靠指标。对于单缝层，发现每个桩帽都向附加载荷弯曲，所有弯曲力矩都沿一个方向旋转。这是双层淤泥的独特之处，发现它们受到土壤不均匀性的严重影响。