Abstract
Vacuum dewatering method has been widely used in geotechnical engineering. However, there is little research on the groundwater level distribution under the effect of vacuum pressure which is generated by vacuum wells. In view of this, the groundwater level distribution in phreatic aquifer is analyzed. First, the vacuum pressure distribution in soil is analyzed through Darcy’s law and steady-state seepage control equation based on established particles and pores model. Second, the boundary conditions are modified by the vacuum pressure distribution law and then the water level distribution equations in flow boundary and waterhead boundary conditions are derived. Finally, dewatering experiment is carried out to analyze the water levels in vacuum and nonvacuum dewatering and verify the theoretical model of water level distribution in vacuum dewatering. The results show that, in both boundary conditions, the water levels in vacuum dewatering are lower than those in nonvacuum dewatering. The theoretical values agree with the experimental values well, which proves the rationality of theoretical equations and predicting the water levels in vacuum dewatering method.
Highlights
Groundwater has brought great difficulties and risks to underground engineering, especially in fractured aquifer [1,2,3,4,5]
Peila et al [6] and Bianco and Bruce [7] discussed the use of large diameter wells in landslide stabilization
Huang et al [8] analyzed the solution of transient drawdown for constant-flux pumping at a partially penetrating well in a radial two-zone confined aquifer and Dimkic et al [9] discussed the simulation method of the radial wells
Summary
Groundwater has brought great difficulties and risks to underground engineering, especially in fractured aquifer [1,2,3,4,5]. Among groundwater control methods, dewatering has been widely used in slope treatment and large underground engineering. Nowadays, dewatering method mainly includes large diameter well, radial well, electroosmosis well, light well point, and vacuum tube well. All water attracted and intercepted by these large drainage columns is transmitted by gravity to a convenient draw off point. This system has been used to depths of over 50 m [7]. Light well point method has shown better effects in treating complex situation such as water in weakly permeable layer, which has been widely used in foundation pit engineering and foundation treatment. This paper conducts theoretical and experimental research on the water level distribution under vacuum dewatering conditions and related laws, which aims at providing theoretical reference for the application of vacuum dewatering
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
