龙洞堡机场隧道下穿新人工填筑土监控量测施工技术

结合贵阳枢纽白云至龙里北铁路高风险隧道——龙洞堡机场隧道下穿新人工填筑土及机场敏感构筑物施工实例,综合多种监控量测方法,施工过程中采取密切监测围岩变化、及时优化初期支护参数控制围岩变化,实现了隧道的信息化施工。主要介绍了新人工填筑土段及下穿地表敏感构筑物段隧道洞内沉降、地表沉降及地表建筑物变形的监测,对新人工填筑土中土体的变位和稳定性等进行综合分析,并将监测结果准确应用到隧道现场施工中,可为中长隧道不良地质施工监控量测技术提供借鉴。

Monitoring and Measurement Technology for Longdongbao Airport Tunnel under New Artificial Embankment Soil

Combined with the example of high-risk north railway tunnel on the hub of Guiyang Baiyun to Longli, longdong- bao airport tunnel under new artificial filling soil and the airport sensitive structure construction, a variety of monitoring measurement methods, closely monitoring of the changes of surrounding rock adopted in construction process, timely opti- mization of primary support parameters to control the change of the surrounding rock make true the informationized construction of the tunnel. The paper mainly describes the deformation monitoring of the new artificial filling soil, inner tunnel settlement of the section under surface sensitive structures section, surface settlement and ground building deformation monitoring. Comprehensive analysis is carried out on the new artificial filling soil displacement and stability of the soil and so on which was accurately applied to the field construction of tunnel and could be taken for reference by other similar projects.