广西钦州大跨度小净距矿山法隧道群设计

肖敏

摘要:

广西钦州北部湾项目有B1、B2、B3、B4四条隧道,B2、B3为双向八车行通道,B1、B4为人非车道,相互净距仅4.5~5m,为确保隧道施工期间整体安全,采取中夹岩加固、严格控制施工工序、加强超前支护和初期支护、根据监控量测结果调整二次衬砌施工时间,最终确保本项目隧道顺利施工。

Abstract:

There are four tunnels in the Beibu Gulf Project of Qinzhou, Guangxi Province, which are B1, B2, B3 and B4 Tunnel. B2 and B3 tunnel are eight-lane tunnels, and B1 and B4 are human-non-lane tunnels.The clear distance between them is only 4.5~5m. During the tunnel construction, the middle rock reinforcement, strict control of construction procedures, adjustment of advance support and initial support, and strengthening of monitoring and measurement are adopted to ensure the construction safety of the tunnel.