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通过在现有解的形式基础上增加一个二次多项式,提出一种新的复合地基固结解的形式及解答方法,推导得到地基附加应力既随时间变化也随深度变化条件下考虑桩体竖向及径向二维井阻作用的散体材料桩复合地基固结解析解,通过退化、与已有解的比较等方法对解进行分析验证。结果表明,现有的瞬时荷载下考虑桩体径竖向渗流的解、考虑桩体竖向渗流与变形协调的解、太沙基一维固结解等都是本文解的特例,这说明本文解的正确合理性。地基加载历时越长,固结越慢;地基底部附加应力越小,固结越快;考虑桩体径竖向二维井阻时地基固结比只考虑竖向井阻时慢,桩径比越小,桩体渗透系数越小,两者的差异越大。本文解的表达形式及解答方法,为复合地基固结度的求解提供一种新的思路,发展和完善了现有的复合地基固结理论。
By adding a quadratic polynomial on the basis of the existing solution, a new form and solution method for the consolidation solution of the composite foundation are proposed. It is deduced that the additional stress of the foundation changes with time and also considers the pile body under the condition of depth change. Analytical solutions for the consolidation of composite foundations with discrete materials and radial two-dimensional well bores are performed, and the solutions are analyzed and verified by methods such as degradation and comparison with existing solutions. The results show that the solution to the vertical seepage flow considering the pile diameter, the solution considering the vertical seepage and deformation coordination of the pile, and the one-dimensional consolidation solution of Taishaji are all special examples of this paper. The correctness and rationality of the solution. The longer the duration of the foundation loading, the slower the consolidation; the smaller the additional stress on the foundation is, the faster the consolidation will be. When considering the vertical two-dimensional well resistance of the pile, the consolidation of the foundation is slower than that of the vertical well resistance only, and the ratio of the pile diameter is slower. Small, the smaller the permeability coefficient of the pile, the greater the difference between the two. The expression form and solution method of the solution provide a new idea for the solution of the consolidation degree of the composite foundation. The existing consolidation theory of composite foundation is developed and improved.