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在线性加载的情况下,考虑了扰动区土体水平渗透系数抛物线变化以及桩周土体的径、竖向组合渗流,给出了该问题的控制方程以及解答。在超静孔压解的基础上,给出了复合地基的固结度的表达式。最后对复合地基的固结性状进行了分析并与以往解做了比较,结果表明:加荷历时越久,地基固结越慢;桩体施工对周边土体的扰动越大,地基固结越慢;所给出的地基固结度较考虑扰动区土体水平渗透系数直线变化或者保持不变的解给出的固结度要快。
Under the condition of linear loading, considering the parabola change of soil horizontal permeability coefficient and the seepage and vertical combined seepage of the soil around the pile, the governing equations and solutions for the problem are given. On the basis of the extra-static pore pressure, the expression of the consolidation degree of the composite foundation is given. Finally, the consolidation behavior of the composite foundation is analyzed and compared with the previous one. The results show that the longer the loading duration, the slower the foundation consolidation; the greater the disturbance to the surrounding soil caused by the pile construction, the slower the foundation consolidation ; The degree of consolidation given is faster than that obtained by taking into account the linear change of soil horizontal permeability coefficient of disturbed area or the unchanged solution.