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Radial consolidation with variable compressibility and permeability following pile installation

机译:桩安装后的径向固结具有可变的可压缩性和渗透性

摘要

The excess pore pressure generated by pile installation gradually dissipates following installation, which mainly dominates the increase of pile capacity with time. The dissipation of the excess pore pressure following pile installation has been widely investigated by experimental and theoretical studies. However, in most research, the consolidation coefficients were assumed to be constant for simplification, which may lead to errors. In the present study, the dissipation of the excess pore pressure is analyzed by radial consolidation theory with a variable consolidation coefficient based on the linear responses of e - ln(p′) and e - log(k). The governing equation of the radial consolidation considering variable compressibility and permeability are solved by the variable separation method. Bessel functions are used to solve the differential functions for the time independent part. The excess pore pressure immediately after pile installation is obtained from cavity expansion theory and is used as the initial condition of the consolidation process. Moreover, the influences of variable compressibility and permeability on the variation of consolidation coefficient and excess pore pressure dissipation are analyzed.
机译:桩安装后产生的过大孔隙压力在安装后逐渐消散,这主要控制了桩容量随时间的增加。通过实验和理论研究,广泛研究了桩安装后多余孔隙压力的消散。但是,在大多数研究中,为简化起见,假设固结系数是恒定的,这可能会导致误差。在本研究中,基于径向固​​结理论,利用基于e-ln(p')和e-log(k)的线性响应的变固结系数,分析了多余孔隙压力的耗散。通过变量分离法求解了考虑可变压缩率和渗透率的径向固结控制方程。贝塞尔函数用于求解时间独立部分的微分函数。刚安装完桩后的多余孔隙压力是从空腔膨胀理论中获得的,并用作固结过程的初始条件。此外,分析了可变压缩率和渗透率对固结系数变化和过量孔隙压力耗散的影响。

著录项

  • 作者

    Zheng JJ; Lu YE; Yin JH; Guo J;

  • 作者单位
  • 年度 2010
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类

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