水位线性下降引起的软土一维固结解析解

In this paper, the problem of land subsidence caused by groundwater withdrawal was studied. Analytical solution was derived for one-dimensional consolidation of soft soil when the water table of the lower soil layer is declining linearly due to large-scale groundwater withdrawal. Furthermore, formulas were given for calculating amount of compression and average degree of consolidation. Then, a case history was studied. The results show that the amount of compression of soft soil under 1m water head difference is equal to that induced by 5kPa uniformly distributed load on the top of the soil layer. The consolidation rate of soft soil accelerates when the water table of the lower soil layer is declining linearly. In contrast, the consolidation rate of soft soil slows down when the water table of the lower soil layer is steady.