Journal
COMPUTERS AND GEOTECHNICS
Volume 91, Issue -, Pages 192-202Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2017.07.014
Keywords
Confined aquifer; Dewatering; Barrier; Head difference
Categories
Funding
- National Nature Science Foundation of China (NSFC) [41672259, 41072209]
- National Basic Research Program of China (973 Program) [2015CB057806]
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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. (C) 2017 Elsevier Ltd. All rights reserved.
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