超大直径盾构衬砌及止水带防火特性研究

拓勇飞; 舒恒; 郭小红; 张亚果; 丁文其

超大直径盾构衬砌及止水带防火特性研究 English Version

1.中交第二公路勘察设计研究院有限公司，湖北武汉 430056；2.中交南京纬三路过江通道工程建设指挥部，江苏南京211800；3. 同济大学地下建筑与工程系，上海 200092

详细信息

作者简介:
拓勇飞(1976- )，男，陕西子洲人，高级工程师，主要从事隧道与地下工程等方面的设计与研究工作。E-mail: tuoyongfei@163.com。

中图分类号: U455.43
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出版历程
- 收稿日期: 2013-04-07
- 发布日期: 2013-07-18

Fireproof characteristics of lining and waterproof of shield tunnel with super-large diameter

1. CCCC Second Highway Consultants Co., Ltd., Wuhan 430056,China; 2. CCCC Nanjing Weisan Rd. River-crossing Tunnel Construction Headquarters, Nanjing 211800, China; 3. Geotechnical Engineering Department, Tongji University, Shanghai 200092, China

摘要

摘要: 南京纬三路过江隧道处于高水压、软弱地层等情况下，火灾可能导致隧道衬砌及密封防水失效，使得隧道发生渗漏、涌水，对隧道造成毁灭性的灾害。采用有限元数值方法，对施工条件下、正常运营条件下无防护措施和有防护措施3种情况的衬砌管片进行火灾数值模拟。分析结果表明：施工状态下，止水带附近的温度在60℃以下，止水带处于安全状态；运营条件下，当无防火措施发生2 h火灾时，内侧止水带附近的最高温度接近300℃，止水带会被烧焦破坏；当有30 mm防火板保护发生2 h火灾时，止水带的最高温度保持在100℃之内，止水带安全。计算结果还表明，20 mm厚的防火板材在1 h的较大火灾的情况下能够保证结构的安全和止水带的安全，而30 mm厚的防火板能够在2 h的较大火情下保证结构的安全和止水带的安全。
- 防火特性 /
- 盾构隧道 /
- 衬砌 /
- 止水带
Abstract: The Weisan Road Yangtze River tunnel of Nanjing is under high water pressure and passes through weak stratum. Fire may cause the failure of lining and the waterproof, resulting in tunnel leakage and water gushing, and it may cause destructive disasters of the tunnel. Based on the FEM analysis, segments under fire and different conditions are simulated, including construction stage, normal operation condition without protective measures and normal operation conditions with protective measures. The analysis shows that, at construction stage, the temperature near the waterproof is below 60 ℃, and the waterproof is in a safe state. Under operating conditions without fire prevention measures, after fire of 2 h, the maximum temperature near the internal waterproof is close to 300 ℃, and the waterproof will be burned. Under the protection of 30 mm-fireproof board, after fire of 2 h, the maximum temperature of the waterproof can be controlled below 100 ℃, ensuring the safety of the waterproof. The 20 mm-fireproof board can ensure the structural safety and the waterproof safety for 1 h under larger fire case, and 30 mm-fireproof board can ensure the safety for 2 h.
- fireproof characteristic /
- shield tunnel /
- lining /
- waterproof

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参考文献(1)

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