scholarly journals 2-D steady seepage flow model to simulate the contaminates transportation through homogeneous earth dam using Geo–Studio software

2020 ◽  
Vol 870 ◽  
pp. 012028
Author(s):  
S. M. Sadiq ◽  
Faris A. Kubba ◽  
Fatin K. I. Ahmed
Keyword(s):  
Flow Model ◽  
Seepage Flow ◽  
Earth Dam ◽  
Steady Seepage

An Analysis of Two-Dimensional Steady Seepage Flow of Earth Dam Based on FEM

2012 ◽  
Vol 446-449 ◽  
pp. 2699-2702
Author(s):  
Chang Chun Wu
Keyword(s):  
Flow Model ◽  
Seepage Flow ◽  
Earth Dam ◽  
Two Dimensional ◽  
The Earth ◽  
Dimensional Finite Element ◽  
Multi Media ◽  
Steady Seepage ◽  
Complex Boundaries ◽  
Set Up

Through project examples, this paper set up a two-dimensional finite element seepage flow model with the help of the Auto-BANK software, to solve the soakage line overflow points, seepage quantity and seepage gradient of the earth dam based on the basic equation of steady seepage flow of earth dam and definite conditions. It is found that this method can effectively calculate and analyse multi-media seepage flow field with complex boundaries.

scholarly journals Optimized Design of Earth Dams: Analysis of Zoning and Heterogeneous Material in Its Core

2020 ◽  
Vol 12 (16) ◽  
pp. 6667 ◽  
Author(s):  
José Sánchez-Martín ◽  
Rubén Galindo ◽  
Carlos Arévalo ◽  
Ignacio Menéndez-Pidal ◽  
Liliya Kazanskaya ◽  
...  
Keyword(s):  
Heterogeneous Material ◽  
Seepage Flow ◽  
Point Of View ◽  
Earth Dam ◽  
Optimized Design ◽  
Flow Rates ◽  
Geotechnical Characteristics ◽  
Large Dispersion ◽  
Hydraulic Gradients ◽  
Dam Core

To control the seepage in the design of an earth dam, guidelines prescribe a high proportion of fines and high homogeneity of geotechnical characteristics in the material used for the dam core. However, on many occasions there is no material of this nature near the dam placement and, from an economic or environmental point of view, it is not possible to locate and transport material with good geotechnical characteristics close to the dam. This research demonstrated the possibility of using impermeable materials in earth dam cores, as well as soils considered unsuitable according to the classic recommendations and guidelines. For an optimized design, two situations are analyzed here. First, we examined the possibility of using soil with a marked difference in grain size as the core of the dam, each with homogeneous geotechnical properties. In this case, the optimal zoning of up to three types of materials was studied to ensure adequate seepage control. Second, we examined the use of soil with great geotechnical heterogeneity, which presents high permeability dispersion. In such a case, the conditions that would allow its use were studied via the of Montecarlo analysis. By maintaining the soil’s global heterogeneity, it was possible to study an unlimited disposition of layers of different permeability. In the first situation, the results showed that the most effective zoning for decreasing seepage flow corresponded with three vertically set materials. In this design, the most optimized zoning (minimal seepage flow rates) corresponded to the most impermeable soil situated downstream when water heights were under 90% of the height of the dam core. However, for maximum water height, more optimized cases corresponded to the intermediate permeability material located downstream. In the second situation, when heterogeneous materials were used to construct the impervious element of the dams, the Montecarlo analysis indicated that the seepage flow rates were limited to sufficiently low values despite the large dispersion of material permeability. In addition, the highest maximum hydraulic gradients were observed in the lowest lifts of the dam core and for situations in which the seepage flow rates were moderate and low.

Simulation of Seepage Flow in Earth Dam with a Free Surface

2012 ◽  
Vol 433-440 ◽  
pp. 1465-1469
Author(s):  
Wen Li Wei ◽  
Hong Zhao ◽  
Pei Zhang ◽  
Y.I. Liu
Keyword(s):  
Mathematical Model ◽  
Seepage Flow ◽  
Earth Dam ◽  
Matrix Equations ◽  
The Finite Element Method ◽  
Curvilinear Boundary ◽  
Seepage Flows ◽  
Large Matrix ◽  
Physical Laws ◽  
The Mathematical Model

The technique of curvilinear boundary-fitted coordinate system is used for the mathematical model of pressure underground seepage flow and the boundary conditions and the method of solving the transformed equations have been presented. The computing example shows that the computed hydraulic parameters conform to the physical laws. Compared with the finite element method, the presented method need not solve the large matrix equations, and the computer memories and the time for computing are less. The mathematical model is effective for numerical solution of seepage flows with complicated boundaries, and can be used in practice hydraulic engineering.

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