Simple Method of Modeling PVD-Improved Subsoil
Simple Method of Modeling PVD-Improved Subsoil
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DOI：
10.1061/(asce)1090-0241(2001)127:11(965
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发表时间：
2001-11
影响因子：
3.9
通讯作者：
J. Chai;S. Shen;N. Miura;D. Bergado
中科院分区：
文献类型：
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作者：
J. Chai;S. Shen;N. Miura;D. Bergado
在宏观尺度上，在地基中安装预制垂直排水管（PVDs）的效果是增加地基在垂直方向上的质量导水率。基于这一概念，提出了一种简单的方法来模拟PVD改良地基，其中一个等效的垂直渗透系数kve的PVD改良地基显式推导。采用本文提出的简化方法，对PVD加固地基的分析与未加固地基的分析相同。在一维条件下对该方法进行了理论验证。将该方法计算的平均固结度和超静孔隙水压力沿竖向的分布与已有的理论解（太沙基固结理论和Hansbo PVD固结解的结合）进行了比较。从理论上证明了，在平均固结度方面，在单层情况下，不考虑天然地基的竖向排水时，地基的最大固结度为0.001。
On a macroscale, the effect of installing prefabricated vertical drains (PVDs) in a subsoil is to increase the mass hydraulic conductivity of the subsoil in the vertical direction. Based on this concept, a simple method for modeling PVD improved subsoils is proposed, in which an equivalent vertical hydraulic conductivity kve for the PVD improved subsoil is explicitly derived. With the proposed simple method, analysis of PVD improved subsoil is the same as that of the unimproved case. The theoretical verification of the simple method was made under 1D condition. The calculated average degree of consolidation and excess pore pressure distribution in the vertical direction using the simple method are compared with existing theoretical solutions (combination of Terzaghi's consolidation theory and Hansbo's solution for PVD consolidation). It has been proved theoretically that, in terms of average degree of consolidation, in the case of one layer and ignoring the vertical drainage of natural subsoil, the maximu...