地铁衬砌结构火灾后稳定性分析

Stability Analysis of Subway Lining After Fire

对地铁衬砌材料C35混凝土进行500℃高温作用3h后力学性能试验,然后基于室内试验研究情况,采用有限差分软件FLAC对火灾后衬砌结构的应力以及地表沉降位移进行计算,结果表明,隧洞火灾后各向应力变化不明显,基本不影响衬砌结构的稳定性。

In this paper, the mechanical properties of the subway lining material C35 concrete were tested at 500℃ for 3 hours. Then, based on the laboratory test conditions, the finite difference soltware FLAC was used to calculate the stress of the lining structure atter the fire and the ground surface settlement displacement. The results showed that the change of each stress of the tunnel after the fire is not obvious and hardly influences the stability of the lining structure.