A three-dimensional fluid-solid coupled numerical modeling of the barrier leakage below the excavation surface due to dewatering
| Autor: | Yong-Xia Wu, Shui-Long Shen, Annan Zhou, Hai-Min Lyu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
geography
Hydrogeology geography.geographical_feature_category 010504 meteorology & atmospheric sciences Groundwater flow 0208 environmental biotechnology Aquifer 02 engineering and technology 01 natural sciences Dewatering 020801 environmental engineering Earth and Planetary Sciences (miscellaneous) Drawdown (hydrology) Geotechnical engineering Penetration depth Geology Groundwater 0105 earth and related environmental sciences Water Science and Technology Leakage (electronics) |
| Zdroj: | Hydrogeology Journal. 28:1449-1463 |
| ISSN: | 1435-0157 1431-2174 |
| DOI: | 10.1007/s10040-020-02142-w |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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