软土地区储罐群地基沉降的三维数值模拟

在软土地区修建储罐群的过程中,不均匀沉降成为工程的主要控制因素之一.由于沉降问题受到储罐间距、孔隙水压力变化等动态因素的影响,使得问题的解决趋于复杂.运用FLAC~(3D)数值模拟软件,建立三维非线性有限差分模型,综合各种变化因素的影响,研究软土地区不同净距的储罐群地基的变形及应力分布,模拟分析不同净距对储罐沉降和沉降差的影响.结果表明,在考虑地基土附加应力和超孔隙水压力共同作用时,储罐净距为0.6D(D为储罐直径)左右时比较合理.

Three-dimensional numerical simulation of foundation settlement of storage tank group in soft soil area

In the process of constructing storage tank in soft soil area, the differential settlement is one of the main controlling factors. As the result of the influence of some dynamic factors such as tank spacing, pore water pressure change, the issue of the settlement tends to complex. By using FLAC~(3D) numerical simulation software, a three-dimensional nonlinear finite difference model was established. Synthesizing various factors, the deformation behavior and the stress distribution of the foundation of storage tank group with different clear distance in soft soil area were studied. The effects of different clear distances on the tank settlement and differential settlement were analyzed. The results show that in considering the additional stress of foundation soil and the excess pore water pressure together, it is reasonable when the tank spacing is 0.6 times the tank diameter.