Analytical solution for consolidation of composite foundation accounting for variation of soil horizontal permeability coefficient;
考虑土体水平渗透系数变化的复合地基固结解
The differential governing equations for the consolidation of composite ground with granular columns are established,which can consider the gradual variation of horizontal permeability coefficient of soft soil in a drainage influential zone caused by disturbance during granular column construction.
建立考虑排水影响区土体水平向渗透系数因施工扰动影响而逐渐变化的散体材料桩复合地基的固结定解问题,并求出其一般解。
A general analytical solution is given to the consolidation problem for the composite ground with granular columns under time-dependent loading and arbitrary variation of horizontal permeability coefficient in the soil of drain influence zone with radial distance.
研究了复合地基固结问题,给出了变荷载及排水影响区土体内水平向渗透系数沿径向任意变化情况下散体材料桩复合地基固结一般解,讨论了复合地基固结特性。
Under the condition of progressive loading,considering a parabolic variation of the horizontal permeability of soil in the disturbed zone and the combination seepage along both radial direction and vertical direction in the surrounding soil,the governing equations for the consolidation of a composite foundation was derived and their solutions were obtained.
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。
In addition,the parabolic distribution of the horizontal permeability of soil in the disturbed zone due to the influence of the column construction is considered too.
为此,抛弃了桩土界面上水流量相等的假设,考虑了桩体径向渗流引起的桩体固结和变形,同时考虑了桩体施工扰动而造成的扰动区土体水平渗透系数抛物线分布的特点,给出了此类固结问题的控制方程和解答以及复合地基固结度的表达式,并对复合地基固结度的解进行了讨论,可以看出无论井径比(影响区半径和桩体半径之比)趋于1或无穷大,本文固结解均能退化到Terzaghi天然地基一维固结的解答。
OADC with consideration on the gradual variation of horizontal permeabi-lity of soil in disturbed zone is greater than the one without considering the horizontal permeability variation.
考虑了桩体内径竖向组合渗流和涂抹区土体水平渗透系数的两种变化模式,得到了此类固结问题的控制方程。