A large amount of pumping in the deep foundation pit will reduce the groundwater level and lead to surface cracking, building settlement, ground collapse and spring water cut-off. And the groundwater recharge is a good control measure. An integrated system of dewatering and recharge for the deep foundation pit is developed, …

As for the field applications of VCW, besides groundwater dewatering (Jin et al., 2016), heat pump system (Wu et al., 2019) and control of saltwater intrusion (Vats et al., 2020) in the past few years, in situ aquifer remediation (Herrling & Stamm, 1994; Herrling et al., 1991) through VCW has been conducted since the last century.

The design and optimization of the dewatering scheme for deep foundation pits in a highly permeable heterogeneous layer are critical to protect water resources, control subsidence and mitigate ...

Mine Dewatering. Open pits are developed in the mining industry for the extraction of minerals, raw materials, and aggregate. In many circumstances, these pits are excavated below the water table. Depending on the geologic environment and proximity of streams, rivers, ponds, and lakes, significant groundwater inflows may occur.

Groundwater model domain) from publication: Groundwater dewatering optimization in the Shengli no. 1 open-pit coalmine, Inner Mongolia, China | Impacted by groundwater, faults, lithology, and ...

Groundwater remediation system design: Pumping well optimization is used to estimate the most cost-effective pump-and-treat groundwater remediation system by minimizing factors such as the number of pumping wells, and total pumping rates, while maintaining capture of the contaminated groundwater plume. Site dewatering system design: …

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 …

The multi-objective optimization evaluation system based on AHP is constructed from the three aspects of dewatering cost, the impact of settlement on the environment, and the safety and stability ...

Optimal decision of dewatering of an excavation area in an unconfined aquifer is searched by using the combined optimization-simulation approach. In combining groundwater model with the optimization model, response matrix approach, generated on the basis of linear superposition, is used. MODMAN that calls MODFLOW repeatedly to generate …

Introduction. Groundwater control is of vital importance for maintaining engineering safety in underground construction. For deep excavations in the strata with confined aquifers, if the soil weight between the top of the confined aquifer and the excavation face is surpassed by confined hydraulic pressure, hydraulic uplift are likely to happen, which may result in …

The monitored results during dewatering indicate that the simulation and field measurements were in agreement. The results can be applied to similar situations. ... Jiang SM, Kong XL, Ye H et al (2013) Groundwater dewatering optimization in the Shengli no. 1 open-pit coalmine, Inner Mongolia, China. Environ Earth Sci 69:187–196.

The main objectives of this paper are: (1) to calculate hydrogeologic parameters of aquifer based on the pumping tests; (2) to simulate groundwater level at different depths of underground continuous concrete wall during dewatering; (3) to calculate the maximum land subsidence at different distances away from the foundation …

Keywords: dewatering, optimization, ground water modelling. Introduction In recent years the widespread application of numerical models has allowed for realistic analyses of complex groundwater systems and for reliable predictions of the aquifer response to anthropic actions including extensive water pumpage, release of contaminants and …

The optimization scheme for dewatering engineering was determined under hydrodynamic, leakage strength, and ground settlement constraints. The filter …

tlement deformation control, the groundwater environment, and the economic cost. ... provides the dewatering optimization decision scheme for the foundation pit dewatering design and construction ...

Topics covered will include the conditions where different dewatering methods are effective; site subsurface investigation appropriate for dewatering projects, including …

Dewatering involves the removal of groundwater from construction sites to maintain a safe and dry working environment. Several dewatering strategies are commonly used: Wellpoints: Wellpoints are small-diameter pipes equipped with screens that are installed in the ground around the construction area. Vacuum pumps are used to draw water into the ...

This study focuses on optimizing the foundation pit dewatering scheme using the foundation pit dewatering theory and the principles of multi-objective optimization. It explores the development of a multi-objective optimization model and efficient solution technology for foundation pit dewatering. This research focuses on the …

Optimization of confined aquifer dewatering for long-deep excavation using simulation–optimization method. 2024, Underground Space (new) Show abstract. ... Groundwater contamination is a major problem and it can be contaminated by natural or manmade activities. Contaminant sources cannot be identified promptly after a …

An analytical groundwater flow model is used to simulate the flow process in the subsurface and identified results indicated that the DE-based solution approach provides slightly better results than those obtained by using the HS- based solution approach. In this study, a linked simulation–optimization approach is proposed for …

1. Introduction. Groundwater control is of vital importance for maintaining engineering safety in underground construction. For deep excavations in the strata with confined aquifers, if the soil weight between the top of the confined aquifer and the excavation face is surpassed by confined hydraulic pressure, hydraulic uplift are likely to happen, which …

For the groundwater dewatering optimization problems, one objective is to minimize the total pumping rates of the dewatering wells. Another objective is to …

high ground water or alluvial aquifers, or when work is done next to receiving waters. Intermittent dewatering may occur during wet weather periods. • Whether dewatering water is discharged to a municipal separate storm sewer system (MS4). If you discharge to an MS4, you should contact the operator of the system (e.g.,

Join us to Slope Stability 2020 symposiums and discover how DHI deals with geological complexity, optimize dewatering program and explore model uncertainty using data fusion.. 3D unstructured meshing in FEFLOW allows for an increased level of detail in the open pit and a better representation of the geological complexity and …

Afterward, a groundwater optimization model is integrated with the calibrated simulation model to realize groundwater dewatering optimization in the studied open-pit coalmine, and an optimization ...

Groundwater level has to be lowered during deep excavation. A vertical curtain is usually adopted to control the drawdown inside and outside a foundation pit in a built-up area. However, the cost ...

Groundwater control for deep excavations can be achieved by a number of methods such as grouting, pumping or structural walls or a combination of these. ... Confined aquifer dewatering optimization with a modified simulation–optimization method capable of determining the optimal well screen length and depth. 2024, Journal …

A combination of waterproof curtain and a partial penetrating well was proposed for lowering the groundwater table. The optimized dewatering scheme with a curtain depth of 60 m and a hydraulic ...

The extensively updated Groundwater Lowering in Construction: A Practical Guide to Dewatering, 3rd Edition offers practical advice on all phases of groundwater control systems, from planning and design, through installation and maintenance, and ultimately decommissioning. The expertise provided in this book can help you improve …

The optimized dewatering scheme with a curtain depth of 60 m and a hydraulic conductivity of 0.00518 m/d, and four rows of dewatering wells with an equal row spacing of 40 m, well depth of 50 m ...