首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Calculation of head difference at two sides of a cut-off barrier during excavation dewatering
Institution:1. University of Liege, Hydrogeology & Environmental Geology, Aquapole, ArGEnCo Dpt, Engineering Faculty, B52, 4000, Liege, Belgium;2. GHS, Institute of Environmental Assessment and Water Research (IDAEA), CSIC, Barcelona, Spain
Abstract:This paper proposed a series of simple equations to calculate the head difference at the two sides of waterproof curtain. The barrier effect of waterproof curtain is considered from two situations with respect to without barrier case: (i) groundwater head difference below the barrier and (ii) groundwater head difference by convergence into the opening. The solution for the first situation can be derived from hydraulic analyses and the second situation can be obtained using a numerical analysis. The final groundwater head difference is the sum of these two situation according to the superposition principal. In the proposed equations, the head difference is expressed as a function of the inserted depth of the barrier into confined aquifer, the ratio of the hydraulic conductivity of the aquifer, the thickness of the aquifer, and hydraulic gradient under normal conditions. Finally, the proposed equation was applied to a field case to verify the validity of the proposed approach. Compared with the field data, the results show that the proposed method is reasonable.
Keywords:Confined aquifer  Dewatering  Barrier  Head difference
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号