Numerical study on thermal performance of tunnel lining with electrical heating system in cold region

DOI

10.2991/ifeesm-17.2018.50How to use a DOI?

Keywords

tunnel; lining; thermal insulation; temperature field; frost resistance.

Abstract

Application practice of tunnel engineering in cold area shows that the repeated seasonally freezing and thawing cycle of surrounding rock and soil can lead to further breakage and cracking of tunnel lining, resulting in the seepage and freezing of the pore water in surrounding rock and soil. The seeped water or the formed ice is attached to the lining or road surface, thus the potential dangers greatly threatens the traffic safety of the vehicle. It may seriously affect the normal use of the tunnel. Therefore, frost and seepage prevention of tunnel lining is an important problem in the cold region tunnel engineering. In view of this, in the project of the Jinzhangzi tunnel in Chengde, this paper analysis on the insulation effect of the tunnel lining in winter based on the electrical belts .In this paper, two kinds of tunnel lining are considered, one cases corresponding to the tunnel without any thermal insulation measure, and the other adopting the active heating system. The results of numerical simulation show that the installation of the electric heating system on the lining surface can ensure that the lining structure is under the ideal temperature field condition, which can effectively restrain the freezing and thawing damage.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Runlin Yang
AU  - Chengjin Ma
PY  - 2018/02
DA  - 2018/02
TI  - Numerical study on thermal performance of tunnel lining with electrical heating system in cold region
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 266
EP  - 270
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.50
DO  - 10.2991/ifeesm-17.2018.50
ID  - Yang2018/02
ER  -