魏家峁隧道斜井挑顶进洞技术探索

Exploration on Jacked Tunneling Technology of Inclined Shaft in Weijiamao Tunnel

斜井等辅助坑道采取挑顶进洞的施工工艺应用广泛,但挑顶进洞施工的难度较大,造成塌方和突水等安全事故的风险极高。在魏家峁隧道斜井挑顶进正洞施工时,由于采用的工艺得当,防护措施科学可行,安全顺利地完成了施工。为类似斜井进正洞施工提供了参考价值。

The construction technology of roof jacking tunnels for auxiliary tunnels such as inclined shafts is widely used,but the construction of roof jacking tunnels is difficult,causing a high risk of safety accidents such as landslides and water inrush.When the inclined shaft of the Weijiamao Tunnel was jacked into the main tunnel,the protection measures were scientifically feasible due to the proper technology used,and the construction was completed safely and smoothly.It provides a reference value for the construction of similar inclined shafts into the main hole.