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Modeling of the temperature field during drifting of transport tunnels in cryolithic zone(PDF)

《长安大学学报》自然版[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2017年04期
Page:
12-17
Research Field:
冻土路基专栏
Publishing date:

Info

Title:
Modeling of the temperature field during drifting of transport tunnels in cryolithic zone
Author(s):
ISAKOV A GUDKOVA I
Department of Survey, Design, and Construction of the Railways and Roads, Siberian State University of Railway Engineering, Novosibirsk 630049, Siberian, Russia
Keywords:
tunnel engineering cryolithic zone rock thawing thermal boundary layer heat equation
PACS:
U419.92
DOI:
-
Abstract:
A mathematical model and algorithm for solving axisymmetric problems associated with determining the transient thermal field around a cylindrical stonedrift were described. A distinctive feature of the proposed model was introducing an air thermal boundary layer at the contact with the inner boundary of stonedrift in the formulation of the problem. The algorithm for this model was tested by calculating the thawing depth in a rock massif located in permafrost zone in the Far Eastern Part of Russia. The results show that these calculations yielded the thawing depth, which depends upon the thickness of heat insulating layer outside the tunnel lining. The article also presents the results for calculating the thawing depth for a rock mass along the tunnel’s length when both sides of the tunnel are excavated.

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Last Update: 2017-07-17