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提出一种新的复合地基固结度求解方法及表达形式,推导得到了考虑桩体及土体的径竖向渗流,上部荷载分级逐渐施加,扰动区渗透系数呈线性变化等因素的一个较全面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了分析验证。结果表明,现有的单级荷载及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解的特例,这说明了解的正确合理性,发展和完善了现有复合地基固结理论。不考虑桩体径向渗流会高估地基固结速度;地基加载过程越缓,地基固结越慢。提出的求解方法,为复合地基固结度的求解提供了一种新的思路。
A new solution method and expression form for consolidation degree of composite foundation are proposed. One of the factors that takes into account the radial and vertical seepage flow of pile body and soil body, the gradual application of upper load classification and the linear change of permeability coefficient in disturbance zone is more comprehensive Dispersed material pile composite foundation consolidation analytical solution. Through the degradation, compared with the existing solutions and other methods of analysis and verification. The results show that considering the solutions of pile vertical borehole flow under single-stage load and instantaneous load, considering the solution of vertical seepage and deformation coordination of pile body and one-dimensional consolidation of Taishaji foundation, This shows that the correct understanding of the rationality, development and improvement of the existing theory of composite foundation consolidation. Without considering the radial seepage of pile, the ground-based consolidation speed will be overestimated; the more slowly the ground-based loading process, the slower the foundation consolidation. The proposed method provides a new idea for solving the consolidation degree of composite foundation.