Author(s)

Yunsheng Liu, Lei Niu, Jing Wang

Corresponding Author

Yunsheng Liu

Abstract

Setting the impervious curtain can reduce the effect of pumping groundwater in the pit on the groundwater level outside the pit and the impact of excavation on the surrounding environment. The descent of the groundwater level in the pit is closely related to the depth of the impervious curtain. This paper, with simulate computation and quantitative calculation, analyses the relationship between the depth of the impervious curtain and the depth of the head. The simulation results show that with the increase in the depth of the curtain, the influence of pumping groundwater on the pit is reduced. This process is very significant at the beginning. But when the length of the impervious curtain increases to a certain value, it will no longer have obvious influence on the decline in the water level outside the pit. While at the same time, the project cost is significantly increased. Through this comparative analysis, it is clarified that the application of pensile curtain is feasible in Harbin floodplain area, which provides effective reference to the application of pensile curtain in the Harbin River floodplain.

Keywords

Pensile curtain; Harbin floodplain; Seepage analysis; Pumping of foundation pit