American Society of Civil Engineers


Study on Evaluation Method of Fire Safety of Tunnel Lining Structure


by Zhiguo Yan, (Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University ; Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China. E-mail: yanzguo@tongji.edu.cn) and Hehua Zhu, (Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University ; Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China. E-mail: zhuhehua@tongji.edu.cn)
Section: Tunneling and Underground Construction, pp. 288-293, (doi:  http://dx.doi.org/10.1061/41107(380)39)

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Document type: Conference Proceeding Paper
Part of: Deep and Underground Excavations
Abstract: High temperature will results in severe damage to tunnel lining structure. To evaluate safety status of tunnel lining structure in fire accidents, an evaluation method based on Fuzzy Comprehensive Evaluation is established. A series of evaluation indicators which include basic parameters of tunnel, characteristic of lining concrete, surrounding conditions of tunnel, fire scenarios and fire-prevention methods are employed in the method. The weight and quantitative score of these evaluation indicators are determined through the Analytic Hierarchy Process (AHP) based on fire experiments and investigation. Furthermore, evaluation process and safety standard are present. The method is utilized successfully in the Shanghai Yangtze River Tunnel, and according to the evaluation results, the suggestions how to improve fire-protection ability of lining structure are obtained as follows: a)mixing polypropylene fiber into lining concrete to prevent concrete from spalling, 2) to fill handhole of segment with concrete or cement mortar to protect linking bolt from fire.


ASCE Subject Headings:
Fire safety
Tunnels
Linings
Underground construction