特长大断面公路隧道斜井排烟联络通道施工技术

Construction Technology of Inclined Shaft Flue Gas Passage in Extra Large Section Highway Tunnel

随着我国高等级公路标准的提高,修建的长大隧道越来越多,斜井逐步成为运营通风和运输通道的重要方式。限于地形条件,为缩短斜井长度,斜井的设计坡度越来越大。武深高速青云山特长大断面公路隧道通风斜井存在断面大、围岩条件差、坡度陡、半径曲线小、上跨正洞段施工干扰大等难题。文章依托青云山大断面公路隧道斜井排烟联络通道的施工,采用合理的施工工法及一系列应对措施,确保了斜井及排烟联络通道与正洞的顺利连接,保证了斜井的安全顺利施工,可为国内外类似工程的施工提供一定的参考。

With the improvement of high-grade highway standard in our country,more and more large tunnels have beenbuilt,and it is common to use inclined shafts as the means of operating ventilation and transport corridors. Restricted byterrain conditions and also to shorten the length of slope well,the design grade of the slope is increasing. The inclinedventilation shaft of the large section of the Qingyun mountain highway tunnel in Wushen high-speed has the problems oflarge section,poor conditions of surrounding rock,steep slope,small radius curve and large construction disturbance inthe upper span. This paper took the construction of the slope well忆s discharge flue as an example,and reasonableconstruction methods and a series of measures were used to ensure the smooth connection between the shaft and the hole,and the safe and smooth construction of the inclined shaft,can provide certain reference significance for the constructionof domestic and foreign similar projects.