Dewatering control of foundation pit under the condition of failure of water-stop curtain

Abstract

The water-stop curtain can effectively isolate or weaken the hydraulic connection between the inside and outside of the foundation pit, which has a significant impact on the safety of foundation pit excavation and the surrounding environment. In the event of the failure of the water-stop curtain, the measures of laying groundwater recharge wells outside the pit can be used to maintain the water level outside the pit and avoid excessive settlement of buildings outside the pit. Through the practice of a certain foundation pit in Shanghai, this paper proves the feasibility of groundwater recharge measures in dealing with the failure of the water-stop curtain and provides a reference for similar projects. Groundwater recharge measures have certain advantages over other treatment measures in terms of cost and construction period, and have good economic and social benefits.