Conclusion
For obtaining a high quality, molithically pressed lining for tunnels in sands and clayey sands at nautral moisture content, the following basic conditions should be fulfilled:
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a)
The shove of the shield should be so chosen that, consistent with the construction of the shield and the force of the jacks, a uniform, continuous movement is ensured throughout the shove.
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b)
The pressing unit should have facilities for rotation, essential for carrying out work along the chosen track without eccentricity, while the pressure, built up by the unit, should be adequate for repressing of concrete and compaction of the soil all around the lining perimeter.
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c)
The formwork should not cause harmful mechanical effects on the lining during the setting and hardening of concrete.
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d)
The composition of the concrete mix should be so chosen that its repressing ability is preserved during the entire process of advance of the shield.
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Literature Cited
“Unit for the construction of hydrotechnical tunnels. (GIS). (Information) from the Ministry for the Construction of Power Stations,” Gidrotekh. Stroitel', No. 9 (1960).
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L. D. Vergasov and V. A. Khodosh, “Settlementless method for the construction of tunnels laid at shallow depths,” Transportnoe Stroitel'stvo, No. 10 (1965).
E. A. Demeshko and V. A. Khodosh, “Settlementless driving of collectors,” Vodosnabzheniye i Sanitarnaya Tekhnika, No. 9 (1962).
B. P. Pachulia and I. Sh. Matsavariani, “About the experience of construction of tube tunnels with seamless lining by a mechanized shield,” Collection of Technical Information, [in Russian], Metrostrol, No. 8 (1964).
V. A. Khodosh, “Investigation of certain problems in the construction of settlementless tunnels driven by the shield process in sandy soils at natural moisture content and lined with monolithically pressed concrete,” Author's Abstract of Candidate Dissertation [in Russian], Moscow (1966).
Additional information
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 1, pp. 15–18, January, 1969.
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Khodosh, V.A. Shield method for the construction of tunnels with monolithically pressed concrete lining in sands and clayey sands. Hydrotechnical Construction 3, 22–26 (1969). https://doi.org/10.1007/BF02376367
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DOI: https://doi.org/10.1007/BF02376367