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在竖向变形相等的条件下,同时考虑了桩、土在固结过程中发生竖向和侧向变形、土体中的径向和竖向渗流以及土体水平渗透系数的3种变化模式,给出了此类复合地基固结问题的解析解,并对该解和不考虑桩、土侧向变形的现有解答进行了比较,最后对地基的固结性状进行了参数敏感性分析。结果表明:考虑桩体的侧向变形会降低地基的固结速率;桩、土的泊松比越小,地基固结越快;考虑了桩、土的侧向变形后,复合地基的桩–土应力比虽然随固结逐渐增大,但与现有理论预测的不同,该应力比不会增长到桩-土模量比的值。
Under the condition of equal vertical deformation, three kinds of change modes of vertical and lateral deformation of pile and soil in the process of consolidation, radial and vertical seepage in soil, and horizontal permeability coefficient of soil are also considered. The analytical solution to the consolidation problem of the composite foundation is given. The existing solutions of the solution and the lateral deformation of the pile and the soil are compared. Finally, the parameter sensitivity of the consolidation behavior of the foundation is analyzed. The results show that considering the lateral deformation of the pile body, the consolidation rate will be reduced; the smaller the Poisson’s ratio of pile and soil, the faster the foundation consolidation; considering the lateral deformation of piles and soil, Although the ratio of soil stress increases with the consolidation, the stress ratio does not increase to the value of pile-soil modulus ratio, which is different from the existing theoretical prediction.