浅埋大跨度中风化泥岩高瓦斯隧道施工安全风险控制研究

新建天府国际机场龙泉山隧道同时具有浅埋、大跨度、软弱围岩以及高瓦斯四个风险因素，均是隧道施工中的高风险因素。首先通过分析隧道的风险确定要解决的问题，然后从工法选择、爆破设计及瓦斯控制措施等方面对高风险因素进行系统的施工管控设计，并通过实践证明风险控制有效。

Study on Safety Risk Control of Shallow Buried Long Span Medium Weathered Mudstone High Gas Tunnel Construction

Longquanshan tunnel of newly built Tianfu International Airport emerged in four risk factors, that is shallow burial, large span, soft surrounding rock and high gas, with a high degree of threat in tunnel construction. Firstly, issues need to be solved have been determined through risk analysis, and then systematical control design for high risk factors has been prepared through construction methods selection, blasting design and gas control and other aspects of risk control measures.The practice proves that the risk control is effective.