Block Element Method for Seepage/Stress Coupling in Fractured Rock Foundation of Gravity Dam

Abstract:

Article Preview

The uplift pressure on the foundation surface is one of the unfavorable factors for the stability of a gravity dam. The seepage/stress coupling character in the rock foundation may make the change of the seepage field which can lead to the change of the value of uplift pressure. In this paper, the seepage/stress coupling in fractured rock masses is studied by the two fields across iterative method with the help of block element method. A gravity dam is studied and the numerical analysis results show that the normal stress can affect the seepage character of rock masses greatly. In the region of high pressure stresses, the transmissivity deduces which can bring about the increment of gradient and velocity. This will bring an adverse impact on the stability of the dam. The coupling of seepage and stress in fractured rock foundation cannot be ignored in arithmetical analysis.

Info:

Periodical:

Advanced Materials Research (Volumes 594-597)

Edited by:

Lehua Wang and Gang Xu

Pages:

2455-2459

Citation:

D. S. Yin and W. X. Qing, "Block Element Method for Seepage/Stress Coupling in Fractured Rock Foundation of Gravity Dam", Advanced Materials Research, Vols. 594-597, pp. 2455-2459, 2012

Online since:

November 2012

Export:

Price:

$38.00

[1] G.X. ZHANG, X.F. WU. Influence of seepage on the stability of rock slope coupling of seepage and deformation by DDA method[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(8): 1269-1275. (in Chinese).

[2] Oda M. An equivalent continuum model for coupled stress and fluid flow analysis in jointed rock masses [J]. Water Resources Research, 1986, 22(13): 1845-1856.

DOI: https://doi.org/10.1029/wr022i013p01845

[3] P. CHEN, Y.T. ZHANG. Coupling analysis of seepage/stress for joint rock[J]. Chinese Journal of Rock Mechanics and Engineering, 1994, 13(4): 299-308. (in Chinese).

[4] Y. WANG, Z.Y. XU, B.Y. SU. Four-freedom complete method for the seepage-stress coupled analysis in fissured rock masses[J]. Journal of Hydraulic Engineering, 1998, (7): 55-59. (in Chinese).

[5] S.H. CHEN. Computational rock mechanics and engineering[M]. China Water Power Press, 2006. (in Chinese).

[6] S.H. CHEN,H.R. WANG, W.L. XIONG. Study on the seepage characteristics of joint surface[J]. Journal of Wuhan Univ. of Hydr. and Elec. Eng. ,1989,22(1):53–60. (in Chinese).

[7] G M. Lomize. Flow in Fractured Rocks[M]. Moscow: Gesenergoizdat, (1951).

[8] Louis C. Rock hydraulics[A]. In:Muller L ed. Rock Mechanics[M]. New York:Elsevier Science, (1974).

[9] Nelson. Fracture permeabily in porous reservoirs: experimental and field approach[D]. Texas: Department of Geology, Texas A and M University, (1975).

[10] D.S. YIN, W.M. WANG, S.H. CHEN. Block element method for seepage analysis in three dimensional random fracture network[J]. Rock and Soil Mechanics, 2009, 30(8): 1269-1275. (in Chinese).

Fetching data from Crossref.
This may take some time to load.