深层隧道排水系统中气爆现象机理研究  

Mechanism Study on Gas Explosion in Deep Tunnel Drainage System

作　　者：王斌 吕文斌 沈旭舟 陈汝荣 WANG Bin;LV Wen-bin;SHEN Xu-zhou;CHEN Ru-rong(Pearl River Water Resource Research Institute,Pearl River Water Resource Commission,Guangzhou 510611,China)

机构地区：[1]珠江水利委员会珠江水利科学研究院,广东广州510611

出　　处：《中国市政工程》2023年第1期24-27,91,共5页China Municipal Engineering

摘　　要：通过搭建气爆水力特性物理模型,分别模拟隧道末端竖井和中部通气井气爆现象发生过程,对气爆进行分类并阐述气爆发生机理。研究表明,气流式气爆通过气腔浮力和外部压力的作用产生,增压式气爆一般随气流式气爆而产生,隧道内受困气腔在竖井内释放形成的气流式气爆后,增压式气爆更加剧烈。研究结论能为深层隧道排水系统的设计运行提供参考。By building a physical model of the hydraulic characteristics of gas explosion, the occurrence process of gas explosion in the shaft at the end of the tunnel and the ventilation shaft at the middle of the tunnel is simulated respectively, and the gas explosion is classified and the mechanism of gas explosion is expounded. The research shows that the air-flow gas explosion is generated by the buoyancy of the air chamber and the external pressure. The pressurized gas explosion is generally generated with the air-flow gas explosion. After the trapped air chamber in the tunnel releases the air-flow gas explosion formed in the shaft, the pressurized gas explosion is more intense. The research conclusion can provide reference for the design & operation of deep tunnel drainage system.

关 键 词：深层隧道 气爆 气流式气爆 增压式气爆 

分 类 号：U453.6[建筑科学—桥梁与隧道工程]