Abstract:

Land subsidence in Shanghai is mainly affected by groundwater withdrawal and large-scale construction. Land subsidence occurred by large-scale construction becomes increasingly obvious with the enforcement of groundwater withdrawal management, and affects the safety of construction and working of surrounding lifeline engineering. The study of mechanism and prevention of land subsidence due to construction is low, and the prevention technological system hasn`t been built. To control land subsidence occurred by construction dewatering, this paper introduces the mature technology of artificial recharge in deep confined aquifer to shallow aquifer via test study. Because the sand stratum structure and hydrodynamic condition of shallow aquifer is different with the deep one, the technics and methods of artificial recharge is also different. This test improve on the technics and methods of artificial recharge to suit the shallow aquifer, and monitoring the land surface deformation synchronously to analysis the effect of artificial recharge. To generalize the application of artificial recharge to shallow aquifer, this paper discussed the feasibility and applicability of adopting artifical recharge technology to shallow aquifer in Shanghai.

Key words: shallow aquifer, artifical recharge, land subsidence prevention and controlling, experimental research, Shanghai