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. There are many factors causing land subsidence, and groundwaterextraction is one of the most important causes of subsidence. A set ofcoupled partial differential equations are derived in this study by usingthe poro-elasticity theory and linear stress-strain constitutive relation todescribe the one-dimensional consolidation in a saturated porous mediumsubjected to pore water pressure change due to groundwater table depression.Simultaneously, the closed-form analytical solutions for excess pore waterpressure and total settlement are obtained. To illustrate the consolidationbehavior of the poroelastic medium, the saturated layer of clay sandwichedbetween two sand layers is simulated, and the dimensionless pore waterpressure changes with depths and the dimensionless total settlement asfunction of time in the clay layer are examined. The results show that thegreater the water level change in the upper and lower sand layers, thegreater the pore water pressure change and the total settlement of the claylayer, and the more time it takes to reach the steady state. If the amountof groundwater replenishment is increased, the soil layer will rebound.

Influence of pore water pressure change on consolidation behavior of saturated poroelastic medium