Conclusions
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1.
The tunnel for diversion of the Angren River, constructed in 1971 for the first stage of operation, was designed in accordance with the then existing instructions [3].
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2.
Publication of the new Instructions on the Design of Hydraulic Tunnels [5] made it possible to eliminate construction of the reinforced gunite ring planned for the second stage of construction, which saved 500,000 rubles.
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3.
The design of a similar pressure tunnel according to the new instructions [5] would save more than 1,300,000 rubles due to a reduction in the lining thickness and weigh of reinforcement, and the use of lightweight timbering of sprayed concrete and anchors instead of a protective roof.
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Literature Cited
G. A. Stankov, “Construction of the Angren pressure tunnel,” Gidrotekh. Stroitel, No. 1 (1971).
V. S. Éristov and A. M. Mazur, Underground Work and Improvment of Rock Foundations of Dams [in Russian], Énergiya, Moscow-Leningrad (1966).
Instructions of the Design of Hydraulic Tunnels, SN 238-63 [in Russian], Gosstroiizdat, Moscow (1963).
P. S. Loman, “Experience in the design of tunnels for the Inguri hydroelectric station,” Trudy Gidroproekta, 18, Moscow (1970).
Instructions on the Design of Hydraulic Tunnels, SN 238-73 [in Russian], Stroiizdat, Moscow (1974).
Additional information
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 2, pp. 20–23, February, 1976.
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Ilyushin, V.F., Krylova, S.N. Reconstruction of the Angren pressure tunnel. Hydrotechnical Construction 10, 139–143 (1976). https://doi.org/10.1007/BF02406481
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DOI: https://doi.org/10.1007/BF02406481