Abstract With the wide application of natural gas, in order to increase the sustainability of buried utility tunnel and prevent the explosion of the gas pipeline cabin from threatening process safety, the performance of the partition wall (slab) of the cabin against gas explosion should be investigated. This paper presents the protective effect of unbonded prestressed ultra-high performance reinforced concrete slab (UPUHPRCS) against gas explosion in buried utility tunnel. There were four scenarios in the experiment, among which the variables were the length of tunnel (12,000 mm and 20,000 mm) and gas concentration (7.5 % and 9.5 %). The normal strength reinforced concrete slab (NSRCS) and ultra-high performance reinforced concrete slab (UHPRCS) were tested as reference specimens, and the simple supported steel slab fixed by stacking sandbags was compared with the concrete slab fully constrained on the tunnel. The overpressure curves caused by gas explosions in the tunnel, the damage of each concrete slab and the change of deflections were obtained through the tests. The results indicated that with the increase of the length of the buried utility tunnel, the power of gas explosion will further increase, and the UPUHPRCS, as the partition wall of the gas pipeline independent cabin in the buried utility tunnel, will play an excellent role in against gas explosion. Moreover, the gas explosion may have little effect on the circular section pipeline in the independent cabin.

中文翻译：

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无粘结预应力超高性能钢筋混凝土板对埋地公用隧道瓦斯爆炸的防护作用

摘要 随着天然气的广泛应用，为提高埋地综合管廊的可持续性，防止燃气管道舱室爆炸威胁工艺安全，舱室隔墙（板）的抗瓦斯爆炸性能应提高。调查。本文介绍了无粘结预应力超高性能钢筋混凝土板（UPUHPRCS）对埋地综合管廊瓦斯爆炸的防护效果。实验中有四种情景，其中变量为隧道长度（12,000 mm 和 20,000 mm）和气体浓度（7.5% 和 9.5%）。以普通强度钢筋混凝土板（NSRCS）和超高性能钢筋混凝土板（UHPRCS）作为参考试样进行测试，将沙袋堆放固定的简支钢板与全约束在隧道上的混凝土板进行比较。通过试验得到了隧道内瓦斯爆炸引起的超压曲线、各混凝土板的破坏和挠度的变化。结果表明，随着埋地管廊长度的增加，瓦斯爆炸威力将进一步增大，UPUHPRCS作为埋地管廊内燃气管道独立舱室的隔断墙，将发挥优良的作用。以防止瓦斯爆炸。而且，瓦斯爆炸对独立舱内的圆形截面管道影响不大。通过试验得到各混凝土板的损伤和挠度的变化。结果表明，随着埋地管廊长度的增加，瓦斯爆炸威力将进一步增大，UPUHPRCS作为埋地管廊内燃气管道独立舱室的隔断墙，将发挥优良的作用。以防止瓦斯爆炸。而且，瓦斯爆炸对独立舱内的圆形截面管道影响不大。通过试验得到各混凝土板的损伤和挠度的变化。结果表明，随着埋地管廊长度的增加，瓦斯爆炸威力将进一步增大，UPUHPRCS作为埋地管廊内燃气管道独立舱室的隔断墙，将发挥优良的作用。以防止瓦斯爆炸。而且，瓦斯爆炸对独立舱内的圆形截面管道影响不大。对防止瓦斯爆炸起到很好的作用。而且，瓦斯爆炸对独立舱内的圆形截面管道影响不大。对防止瓦斯爆炸起到很好的作用。而且，瓦斯爆炸对独立舱内的圆形截面管道影响不大。