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Environmental Earth Sciences

Erschienen in:

01.07.2022 | Original Article

Numerical evaluation of a 70-m deep hydropower station foundation pit dewatering

verfasst von: Jianxiu Wang, Yansheng Deng, Xiaobo Wang, Xiaotian Liu, Nianqing Zhou

Erschienen in: Environmental Earth Sciences | Ausgabe 14/2022

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Abstract

The foundation pit of Yamansu hydropower station has an average depth of 70 m and has been excavated with five-level slopes. Lowering of groundwater level is important in excavation. In this study, drainage and pumping were conducted in dewatering. Pumping tests were performed to reverse hydraulic parameters and calibrate numerical models. Numerical simulations were performed to evaluate the dewatering scheme. In the first stage, powerhouse tailrace canal was excavated and used as a drainage channel to lower the groundwater level. Drawdown and hydraulic gradient were evaluated to prevent potential water inrush, erosion, piping, and slope failure. In the second stage, cutoff wall and pumping wells were evaluated to reduce the groundwater level. The influences of depth, permeability, and thickness of the cutoff wall were evaluated. Dewatering scheme was revised accordingly based on the evaluation. The optimized dewatering scheme, which can be used as a reference in similar engineering projects, was performed and verified successfully.

Vorheriger Artikel Prospecting rare earth elements (REEs) using radiation measurement: case study of Baghak mine, Central Sangan iron ore mine, NE of Iran

Nächster Artikel Microstructural and mechanical effect of salt crystallization on remolded loess

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Titel: Numerical evaluation of a 70-m deep hydropower station foundation pit dewatering
verfasst von: Jianxiu Wang
Yansheng Deng
Xiaobo Wang
Xiaotian Liu
Nianqing Zhou
Publikationsdatum: 01.07.2022
Verlag: Springer Berlin Heidelberg
Erschienen in: Environmental Earth Sciences / Ausgabe 14/2022
Print ISSN: 1866-6280
Elektronische ISSN: 1866-6299
DOI: https://doi.org/10.1007/s12665-022-10493-8

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