Журналы →  Gornyi Zhurnal →  2015 →  №11 →  Назад

PHYSICS OF ROCKS AND PROCESSES
Название Efficiency validation for new design of freezing pipe for underground construction
DOI 10.17580/gzh.2015.11.06
Автор Alyushin Yu. A., Korchak A. V., Shuplik M. N.
Информация об авторе

Mining College, MISIS, Moscow, Russia:
Yu. A. Alyushin, Professor, Doctor of Engineering Science
A. V. Korchak, Head of a Department, Professor, Doctor of Engineering Sciences, e-mail: kafedrasp@gmail.com
M. N. Shuplik, Professor, Doctor of Engineering Sciences

Реферат

In civil underground construction, tunneling machines often intersect unstable heavily moist soil. Smooth operation of tunneling machines requires artificial pre-freezing of soil in this case. The freezing technology actually in use includes drilling of a vertical hole usually 138 mm in diameter (more seldom—159 mm) and placement of a freezing pipe 114 mm in diameter in the hole when drilling reaches an assigned depth. Drilling of host holes and assembly of freezing pipes in them takes 45–50% of the total work of soil freezing and is very expensive. The authors put forward a patented design of a freezing pipe made as a hollow pipe with a nose-piece and welded worn fin, which allows driving the pipe in soil by forced revolving. In this case, drilling of host hole is avoided, firm contact is created between the pipe and soil, and power consumption of freezing is reduced. The mathematical model of the forced driving of the freezing pipe in soil is constructred, and the values of axial force and drive torque are calculated as functions of the pipe design parameters and physico-mechanical properties of soil. The theoretical relations obtained using the models were checked and refined in the course of the commercial experimental testing of the new freezing pipe design. As a result, the working ability and high economic efficiency of the freezing pipe were proved.

Ключевые слова Underground structures, unstable soil freezing, hole drilling, freezing pipe, energy-based model, forces and moments calculation, efficiency
Библиографический список

1. Kartoziya B. A., Korchak A. V., Levchenko A. N. Problemy metodologii i praktiki osvoeniya podzemnogo prostranstva megapolisov (Theoretical and practical problems of subsoil development under megacities). Gornyi Zhurnal = Mining Journal. 2014. No. 9. pp. 60–64.
2. Papakonstantinou S., Pimentel E., Anagnostou G. Analysis of artificial ground freezing in the Pari-Duomo platform tunnel of the Naples metro. Numerical Methods in Geotechnical Engineering. Eds. Benz & Nordal. 2010. pp. 281–284.
3. Russo G., Corbo A., Cavuoto F., Autuori S. Artificial Ground Freezing to excavate a tunnel in sandy soil. Measurements and back analysis. 2015. Vol. 50. pp. 226–238.
4. Vakulenko I. S., Nikolaev P. V. Analiz i perspektivy razvitiya sposoba iskusstvennogo za morazhivaniya gornykh porod v podzemnom stroitelstve (Analysis and prospects of development of method of artificial freezing of rocks during underground excavations). Gornyy Informatsionno-Analitichaskiy Byulleten = Mining Informational-Analytical Bulletin. 2015. No. 3. pp. 338–346.
5. Matsegora A. G. Spetsialnye sposoby rabot — nadezhnyy instrument pri proektirovanii i stroitelstve sooruzheniy v slozhnykh inzhenerno-geologicheskikh usloviyakh (Special operation modes as the reliable instrument during the design and construction in complex engineeringgeological conditions). Metro i tonneli = Metro and tunnels. 2011. No. 6. pp. 37–39.
6. Zhou C., Wang C.-S., Li Y.-J., Guo P. Underground barriers clean-up technology for subway shield tunnelling based on ground frozen method. Journal of Railway Engineering Society. 2013. Vol. 30, Iss. 3. pp. 86–90.
7. Zhou X.-M., He Z.-P., Ji H.-G. Design method of freezing rock wall under high water pressure. Journal of the China Coal Society. 2011. Vol. 36, Iss. 12. pp. 2121–2126.
8. Korchak A. V., Shuplik M. N., Nikitushkin R. A., Nikitushkin A. A. Ustroystvo dlya zamorazhivaniya gruntov pri stroitelstve podzemnykh sooruzheniy (Equipment for soil freezing during the civil engineering works). Patent RF, No. 84869. Published: July 20, 2009. Bulletin No. 20.
9. Alyushin Yu. A. Mekhanika tverdogo tela v peremennykh Lagranzha (Mechanics of rigid bodies in Lagrangian coordinates). Moscow : Mashinostroenie, 2012. 192 p.
10. Korchak A. V., Alyushin Yu. A., Nikitushkin R. A. Energeticheskaya model vnedreniya v grunt zamorazhivayushchey kolonki s vintovoy navivkoy (Energetic model of intrusion of spiral freezing column in soil). Gornyy Informatsionno-Analitichaskiy Byulleten = Mining Informational-Analytical Bulletin. 2011. No. 1. pp. 166–176.
11. Deformatsionnye svoystva gruntov (Deformation properties of soils). Available at: http://www.geoteck.ru/publications/public3/M_4.php (accessed: November 6, 2015). (in Russian).
12. Pimentel E., Sres A., Anagnostou G. Large-scale laboratory tests on artificial ground freezing under seepage-flow conditions. Geotechnique. 2012. Vol. 62, Iss. 3. pp. 227–241.

Language of full-text русский
Полный текст статьи Получить
Назад