考虑加载过程的真空预压轴对称解析解

本文在砂井地基轴对称等应变方程的基础上,推导了真空预压荷载下的轴对称孔压、固结度解析解,该解析解利用函数模拟孔压在地表的初始条件,以考虑真空荷载的施加过程,解决了以往真空预压解孔压边界条件和初始条件在地表处的矛盾。同时也可考虑涂抹和井阻等因素,更加接近实际工程情况。通过例题与其他解答及数值解进行了验证、比较,证明了该解答的适用性,可进一步用于实际工程的设计计算。

Axisymmetric analytical solution of vacuum preload considering the loading process

On the basis of axisymmetric equal strain equation of sand drain foundation,the axisymmetric analytical solution of the pore water pressure and consolidation degree under vacuum preloading were derived in this paper. The effect of vacuum loading speed was considered by the function, which was used to simulate the initial condition of surface pore water pressure,and resolved the contradiction of pore water pressure boundary condition and initial condition at the surface.Well resistance and smear were also considered in the analytical solution.With the other answers as well as the numerical solution,the analytical solution has been verified through an example calculation, and ti can be further applied in practical engineering design.