考虑溜桩效应的单桩基础承载特性数值模拟

为分析竖向和水平载荷作用下溜桩对钢管桩承载特性的影响规律，基于理论分析得到的溜桩区间数据，建立考虑溜桩效应的桩-土数值模型。结果显示：当单桩受到竖向载荷时，溜桩减小桩侧摩阻力，溜桩对钢管桩竖向承载力的影响较为显著；当单桩受到水平载荷时，溜桩条件下钢管桩弯矩大于无溜桩条件下的弯矩，说明发生溜桩会导致钢管桩产生更严重的弯曲变形；溜桩条件下的极限土抗力小于无溜桩情况。

Numerical Simulation on Bearing Characteristics of Single Pile Foundation Considering Pile Sliding Effect

In order to analyze the influence of pile sliding on the bearing characteristics of steel pipe piles under vertical and horizontal loads, based on the data of pile sliding obtained from the theoretical analysis, a numerical model of pile-soil considering the effect of sliding condition is established. The results show that: when a single pile is under vertical load, the sliding condition reduces the side friction of the pile, and the influence of the sliding condition on the vertical bearing capacity of the steel pipe pile is more significant; when a single pile is under horizontal load, the bending moment of the steel pipe pile is greater than that under the condition of no sliding condition, indicating that the occurrence of pile sliding will cause more serious bending deformation of the steel pipe pile; the ultimate soil resistance under sliding condition is smaller than that of no sliding condition.