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The practice of developing criteria of the safe state of an earth dam with respect to slope stability

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Hydrotechnical Construction Aims and scope

Conclusions

  1. 1.

    To increase the promptness and effectiveness of monitoring the state of earth dams, dependences can presently be developed which on the basis of the water level in a piezometer (or in a group of piezometers) make it possible to establish the value of the slope stability factor at a specific time and, in particular, to determine the values of the maximum allowable indices (MAIs) of the water level in piezometers corresponding to the standard value of the slope stability factor in all operating regimes of the structure.

  2. 2.

    It is recommended to determine the values of the maximum allowable indices of the water levels in piezometers for conditions of the normal operating design case (MAIs) and special design case (MAIs). Recommendations on the actions of the directorate in the case of reaching both these levels are given.

  3. 3.

    However, the position of the line of seepage is only one of the factors affecting the stability of dam slopes, and therefore this article gives the composition and quantitative evaluation of other circumstances which must be taken into account when developing the values of the MAIs for earth dams having a soft sand-clay foundation.

  4. 4.

    A method is given for developing the MAIs, the composition of the accompanying topographic and survey works, geotechnical and other investigations is shown. The introduction of these recommendations into practice will promote a decrease of the failure rate of earth dams.

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Literature cited

  1. Recommendations on Determining the Maximum Allowable Values of the Indices of the State and Operation of Hydraulic Structures: P-836-85 [in Russian], Gidroproekt, Moscow (1985).

  2. I. N. Ivashenko, Engineering Evaluation of the Reliability of Earth Dams [in Russian], Énergoatomizdat, Moscow (1993).

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  3. N. A. Krasil'nikov, “On-site observations and monitoring of the stability of earth dams,” Gidrotekh. Stroit., No. 9 (1988).

  4. Transactions of the Joint Conferences on Hydraulic Engineering [in Russian], Énergiya, Leningrad, No. 8 (1964), No. 19 (1965), No. 91 (1974).

  5. SNiP 2.06.05-84. Earth Dams [in Russian], APP TsITP, Moscow (1991).

  6. Recommendations on Designing Earth Dams: P-783-88 [in Russian], Gidroproekt, Moscow (1988).

  7. N. A. Krasil'nikov, Investigation of the Stability of Earth Slopes and Method of Designing Earth Dams: Review Information [in Russian], Informénergo, Moscow (1991).

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  8. N. A. Krasil'nikov, “Selection of the method of calculating earth dams in the case of computer-aided designing,” Gidrotekh. Stroit., No. 6 (1987).

  9. SNiP II-7-81. Construction in Seismic Regions [in Russian], Stroiizdat, Moscow (1982).

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Authors
  1. N. A. Krasil'nikov
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Additional information

Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 12, pp. 43–47, December, 1993.

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Krasil'nikov, N.A. The practice of developing criteria of the safe state of an earth dam with respect to slope stability. Hydrotechnical Construction 27, 732–737 (1993). https://doi.org/10.1007/BF01545718

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