Ground Behaviors due to Seepage Force of Groundwater

Abstract:

Well pumping leads to both horizontal and vertical displacement, and fluctuation of groundwater level can cause serious damage to structures in a lagre affected area. Ground behaviors due to seepage force in traditional methods were rarely considered. This paper presents a numerical solution of ground displacement behaviors due to unsteady groundwater flow in unconfined aquifer by considering the effect of capillary zone based on the saturated-unsaturated seepage theory, and the numerical simulation code implemented by FORTRAN is applied to predict the flow velocity distribution and the results of ground displacement. The model uses the finite element method and finite difference method to study the problem. The analysis shows that the seepage force and the effect of capillary zone play a very important role in both seepage flow and displacement field.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 516-521
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.516
• Online since: November 2012
• Authors: Ling Yu Meng*, Haruyuki Yamamoto
• Keywords: Ground Displacement, Pumping Well, Seepage Flow, Unsteady Flow Analysis

References

[1] Li Guangxin: Advanced Soil Mechanics, Tsinghua University press (2009), pp.220-226

[2] Bathe KT: Finite element free surface analysis without mesh iteration, Numerical and Analytical Methods in Geomechanics, Vol. 3 (1979), pp.13-22

DOI: 10.1002/nag.1610030103

[3] WU Mengxi: Saturated-unsaturated unsteady seepage numerical analysis, Journal of Hydraulic Engineering (1999), pp.499-504, (In Chinese)

[4] FU Jun-feng and JIN Sheng: A study on unsteady seepage flow through dam, Journal of Hydrodynamics (2009), pp.499-504

DOI: 10.1016/s1001-6058(08)60176-6

[5] SHENG Zhen-zhong: Numerical simulation of composite geomembrane defect leakage experiment based on saturated-unsaturated seepage theory, Journal of Hydraulic Engineering (2009), pp.1091-1095

[6] M.TH.Van Genuchten: A Closed-form Equation for Predicting the Hydraulic Conductivity of Unsaturated Soils, Soil Sci. Soc (1980), pp.892-898

DOI: 10.2136/sssaj1980.03615995004400050002x

[7] Makoto NISHIGAKI, Simulation of groundwater flow and solute transport, Gihodo press (2010), pp.31-210, (In Japanese)

[8] Song Hongcai, Zhang Jifeng and Wang Jiang.: Theoretical analysis of numerical simulation with variational finete element method, Journal of Da Qing petroleum institute (1996), pp.105-120, (In Chinese)