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Hydrotechnical Construction

, Volume 30, Issue 8, pp 437–444 | Cite as

Seepage and antiseepage measures in foundations of hydraulic structures

  • L. I. Malyshev
Article

Conclusions

  1. 1.

    Rock foundations of dams are inhomogeneous water-bearing systems, seepage in them has a complex and nonuniform character; for substantiating antiseepage measures the seepage model of foundations maximally corresponding to real conditions can be represented in the form of a three-dimensional piecewise-homogeneous model consisting of a number of structurally homogeneous fragments cut by systems of water-conducting fractures (zones) and confining interlayers.

     
  2. 2.

    The effective thickness of grout curtains on average is equal to 10–12 m, in zones of large-scale fracturing of the rocks — up to 20 m and more; the head gradients in the grout curtains do not exceed 10–18; the effectiveness of grout curtains depends substantially on the permeability of the surrounding rocks, and therefore the role which the grout curtain and drainage play under particular conditions is different.

     
  3. 3.

    The actual diagrams of uplift pressure in the foundations of many operating structures are below the design and standard ones. Under favorable hydrogeologic conditions a reduction of the heads by the watertight grout curtain and drainage in rock foundations of structures is not difficult and can be provided to values considerably less than the standard ones according to SNiP. A generalized diagram of the seepage heads is recommended for calculating the stability of dams on rock foundations in the presence of a grout curtain and drainage.

     
  4. 4.

    Watertight curtains made by the diaphragm wall method have a high effectiveness and economy. Their filler should be selected with consideration of the properties of the surrouding soils, SSS, and seepage strength of the foundation and diaphragm wall.

     

Keywords

Rock Mass Permeability Coefficient Diaphragm Wall Rock Foundation Grout Curtain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    L. I. Malyshev, “Seepage model of rock foundations of high-head dams,” in: Papers of the Third International Symposium “Water Seepage in Porous Media,” Material not in Russian original — Publisher.Google Scholar
  2. 2.
    Material not in Russian original — Publisher and drainage in rock foundations of hydraulic structures” [in Russian], Tr. Gidroproekt, No. 94 (1984).Google Scholar
  3. 3.
    L. I. Malyshev and G. G. Truzhikhin, “Seepage and antiseepage measures in the foundation of the arch dam of the Inguri hydroelectric station,” Gidrotekh. Stroit., No. 2 (1993).Google Scholar
  4. 4.
    L. I. Malyshev, “Special works in power construction,” Gidrotekh. Stroit., No. 12 (1991).Google Scholar
  5. 5.
    V. A. Ashikhmen, G. V. Buchatskii, N. V. Dmitriev, and L. I. Malyshev, “Grouting works in constructing the watertight side curtains of the al-Qadisiyah hydrodevelopment (Iraq),” Gidrotekh. Stroit., No. 1 (1989).Google Scholar
  6. 6.
    L. I. Malyshev, “Seepage strength of watertight walls,” in: Progressive Solutions in the Design and Conduction of Special Hydraulic Works [in Russian], Gidroproekt, Moscow (1979).Google Scholar

Copyright information

© Plenum Publishing Corporation 1997

Authors and Affiliations

  • L. I. Malyshev

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