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A three-dimensional fluid-solid coupled numerical modeling of the barrier leakage below the excavation surface due to dewatering

Wu, Yong-Xia ; Lyu, Hai-Min ; Shen, Shui-Long ; Zhou, Annan

Hydrogeology journal, 2020-06, Vol.28 (4), p.1449-1463 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
A three-dimensional fluid-solid coupled numerical modeling of the barrier leakage below the excavation surface due to dewatering
Autor: Wu, Yong-Xia ; Lyu, Hai-Min ; Shen, Shui-Long ; Zhou, Annan
Assuntos: Anisotropy ; Aquatic Pollution ; Aquifers ; Computer simulation ; Confined aquifers ; Curtains ; Deformation ; Dewatering ; Direction ; Drawdown ; Dredging ; Earth and Environmental Science ; Earth Sciences ; Excavation ; Finite element method ; Flow rates ; Flow velocity ; Geology ; Geophysics/Geodesy ; Groundwater ; Groundwater barriers ; Hydrogeology ; Hydrology/Water Resources ; Leakage ; Mathematical analysis ; Mathematical models ; Penetration depth ; Three dimensional models ; Waste Water Technology ; Water Management ; Water Pollution Control ; Water Quality/Water Pollution
É parte de: Hydrogeology journal, 2020-06, Vol.28 (4), p.1449-1463
Descrição: Waterproof curtains are used as barriers to block groundwater during deep excavations; however, in practice, barrier leakage occurs frequently. This paper establishes a three-dimensional (3D) fluid-solid-coupled finite element model to analyse the effect of barrier leakage below the excavation surface. Uniform and local barrier leakages in a confined aquifer are simulated for a constant flow rate and fixed drawdown. The simulated results show that barrier leakage causes a variation in the flow direction, drawdown of the groundwater head outside of excavation, and significant additional deformation in the longitudinal direction. The factors influencing drawdown and ground settlement induced by leakage include leakage location, leakage area, barrier penetration depth, pumping-well penetration depth, and aquifer anisotropy. In addition, the simulation results show that the drawdown-time curves under various leakage conditions have similar patterns.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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A three-dimensional fluid-solid coupled numerical modeling of the barrier leakage below the excavation surface due to dewatering

Wu, Yong-Xia ; Lyu, Hai-Min ; Shen, Shui-Long ; Zhou, Annan

Berlin/Heidelberg: Springer Berlin Heidelberg

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