松山隧道双洞通风斜井交叉掘进施工技术研究

Research on Cross Tunneling Construction Technology of Double-hole Ventilation Inclined Shaft in Songshan Tunnel

文章针对松山隧道斜井工程施工过程中出现的涌水、坡度陡、通风困难等诸多施工技术难点,提出了适用于富水区隧道双斜井工程的交叉掘进快速施工技术,阐述了交叉掘进技术、工艺流程及相关施工要点。通过数值分析的方法,比选先后开挖和交叉掘进两种施工模式,对所提出技术的合理性进行研究。研究结果表明:交叉掘进施工技术有助于降低两个隧道掌子面的水压力,实现局部的渗漏场的变化,减少涌水压力,避免涌水造成的停工。研究结论对于富水区双斜井工程施工技术方案的确定具有一定的借鉴意义。

In view of many construction technical difficulties such as water gushing,steep slope and difficult ventilation in the construction of Songshan Tunnel inclined shaft project,this paper puts forward the rapid construction technology of cross tunneling suitable for double inclined shaft of the tunnel in water-rich area,and expounds the cross tunneling technology,process flow and related construction points.Through the method of numerical analysis,the rationality of the proposed technology is studied by comparing the two construction modes of sequential excavation and cross tunneling.The results show that the cross tunneling construction technology is helpful to reduce the water pressure on the tunnel face of the two tunnels,realize the change of local leakage field,reduce the pressure of water gushing and avoid the shutdown caused by water gushing.The research conclusion has certain reference significance for the determination of construction technology scheme for double inclined shaft project in water-rich area.