The land subsidence and the construction’s foundation subsidence caused by groundwater withdrawal from deep foundations are the environmental disaster problems in city construction. When groundwater is pumped from a confined aquifer

groundwater level decline will lead to increase effect stress and motion of solid grain in soil layer. Accordingly

it takes place land subsidence. According to this mechanism analysis of land subsidence

a groundwater movement equation considering water expansion

aquifer compressibility and solid grain movement due to groundwater pressure decline is established. It also can be found that Biot’s and Helm’s formula are the special case or the simple mode of the groundwater movement equation. The proposed equation is applied to analyze and calculate land subsidence in foundation engineering. The result indicates the presented groundwater movement equation can efficiently explain the mechanism of land subsidence. Through analysis of alternatives

several control measures are proposed such as waterproof wall

local pumping well

unsymmetrical well group

and small pumping rate.