天龙山隧道穿越采空区技术研究

Study of Technology of Crossing Goaf at Tianlong Mountain Tunnel

针对公路隧道穿越采空区施工关键技术,以天龙山隧道采空区治理为依托,介绍采空区分布现状及特征,探讨隧道穿越采空区相关处理技术的适用性。实践证明:中下导反压回填、上导扇形支撑加固后方拱架、隧道洞身加强支护、混凝土回填塌陷空间、拱部超前支护及注浆加固松散体等技术措施在隧道采空区治理中具有重要推广价值。

According to the key technology of highway tunnel crossing goaf construction,based on the treatment of goaf in Tianlong Mountain tunnel,the distribution status and characteristics of goaf are introduced,and the applicability of the relevant treatment technology of tunnel crossing goaf is discussed.Practice has proved that the middle and lower back pressure backfill,the upper guide fan-shaped reinforcement of the rear arch frame,the tunnel body reinforcement support,the concrete backfill collapse space,the arch front support and the grouting reinforcement loose body and other technical measures have important promotion value in the tunnel goaf governance.