大湾隧道洞口段施工及监控量测信息反馈

PORTAL CONSTRUCTION METHOD AND THE INFORMATIONAL FEEDBACK OF THE MONITORING MEASURES IN HIGHWAY MOUNTAIN TUNNEL

受隧道周边地形、地质、环境及气象等外部条件和隧道内部应力的影响,隧道洞口施工一直是隧道施工的难点,而且其施工进度也严重影响整个隧道施工的速度和质量,因此,采取合理的施工技术手段和监控量测措施来指导施工将显得尤为重要。本文以邵怀高速公路大湾隧道洞口施工为例,根据新奥法隧道施工原理,阐述了采用隧道洞口段监控量测的信息反馈方法来指导施工单位采取合理的辅助施工措施和施工方法,保证安全顺利进洞,确保工程安全和施工安全。

By the effect of exterior condition such as the terrain around, geology, environment, weather and inner stress, the construction of tunnel gate is a difficult problem all along. Its construction schedule also affects the whole tunnel construction＇s speed and quality. So it＇s very important to have reasonable technology means and inspecting and surveying measures to guide the construction. According to the engineering geology conditions of the portal section of the highway mountain tunnels, with the construction of the Dawan tunnel gate, this paper expounds the relevant measures and methods which can excavate into the portal section of the tunnel. Conducted with the principle of NATM and the feedback from the information of monitoring measures, the construction of the tunnel＇s portal section has been going on safely and successfully.