真空和堆载作用了砂井地基固结的边界元分析

边界元法是70年代发展起来的一种新的数值计算方法。本文把边界元法应用于求解真空压力和堆载压力作用下的软粘土砂井地基固结变形的平面应变问题。笔者在文中推导了线性比奥固结理论的边界积分方程,并结合天津新港软土地基的真空预压袋装砂井加固工程就真空预压和堆载预压两种情况进行了计算对比分析;对于砂井地基和无砂井地基的预压效果问题也进行了相应的计算;在文中还把边界元、有限元及差分的计算结果与实测值做了对比。

Analysis of Consolidation of Ground Installed with Sand Drains under Loading and Vacuum by Boundary Element Method

In this paper, the boundary element method was used for analysing the consolidation of a ground treated by sand drains and vacuum n ethod in Tianjin Dort. The boundary integral equations for Biot's linear consolidation theory were formulated and the relevant program was developed. It is found the computed results well agree with the field results. For comparison, analysis were also made using inite element method and finite difference method. The deformation features were discussed of the sand drains ground under loading and vacuum conditions. The consolidatio effectiveness of the ground without sand drains was also calculated in this paper.