Conclusions
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1.
The use of a yielding structure of the arch of the generator hall provides reliable support of the roof under conditions of large tectonic stresses.
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2.
Compared with the more technologically efficient but more material-consuming rigid structure according to the technical design, the proposed structure makes it possible to obtain a technical-economic effect due to a reduction of the volume of works on rock excavation and underground reinforced concrete in connection with reducing the thickness of the arch to 0.7 m.
At present the space under the arch of the generator hall of the Rogun hydrostation is already being driven and works are underway on concreting the arch of the proposed and investigated combined structure (according to variant 6).
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Literature cited
V. F. Ilyushin and A. V. Kolichko, “Effect of engineering-geological factors on the layout and designs of underground structures of the powerhouse complex of the Rogun hydroelectric station,” Tr. Gidroproekta, No. 78, 123–134 (1978).
M. M. Protod'yakonov, M. I. Koifman, et al., Rock Strength Ratings and Methods of Determining Them [in Russian], Nauka, Moscow (1964).
O. N. Zolotov and V. K. Ksenofontov, “Realization of the Mohr criterion in numerical solution of problems of the mechanics of underground structures,” Tr. Gidroproekta, No. 95, 112–120 (1984).
Additional information
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 1, pp. 11–15, January, 1988.
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Zolotov, O.N., Ilyushin, V.F. & Mostkov, V.M. Selection and investigation of supports of the underground generator hall of the Rogun hydroelectric station. Hydrotechnical Construction 22, 6–12 (1988). https://doi.org/10.1007/BF01424210
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DOI: https://doi.org/10.1007/BF01424210