基于多元监测信息的水工隧洞最佳支护时机  

The best supporting time of hydraulic tunnels based on multiple monitoring information

作　　者：肖培伟[1,2] 杨兴国[1,2] 钱洪建 王浩帆 李彪 徐奴文[1,2] XIAO Peiwei;YANG Xingguo;QIAN Hongjian;WANG Haofan;LI Biao;XU Nuwen(College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,Sichuan,China;State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,Sichuan,China;CHN Energy Jinsha River Xulong Hydropower Co.,Ltd.,Garze Tibetan Autonomous Prefecture 627950,Sichuan,China;School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,Sichuan,China)

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]四川大学山区河流保护与治理全国重点实验室,四川成都610065 [3]国家能源集团金沙江旭龙水电有限公司,四川甘孜藏族自治州627950 [4]西南石油大学地球科学与技术学院,四川成都610500

出　　处：《隧道与地下工程灾害防治》2025年第1期11-21,共11页Hazard Control in Tunnelling and Underground Engineering

基　　金：国家自然科学基金资助项目(52474150,42277461);四川省自然科学基金资助项目(2023NSFSC0812)。

摘　　要：为科学判定西南地区复杂地质条件下水工隧洞支护时机,以旭龙水电站导流隧洞为研究对象,集成三维激光扫描、声波测试与微震监测技术,建立表观变形、浅层损伤、内部破裂协同分析方法。通过时空维度连续监测,系统追踪围岩时效变形特征、波速场演化规律及微破裂时空分布模式。监测数据揭示:初始阶段围岩变形、波速以及微震活动较为明显,在11 d后逐渐趋于稳定,此时围岩承载能力得到最大发挥,可作为最佳支护时机的依据。工程实践验证Ⅱ类围岩在开挖11 d后自承能力得到充分发挥。To scientifically determine the timing of hydraulic tunnel support under complex geological conditions in the southwestern region,the diversion tunnel of Xulong Hydropower Station was selected as the research object.Three-dimensional laser scanning,acoustic wave testing,and microseismic monitoring technologies were integrated into a collaborative analysis method for surface deformation,shallow damage,and internal fractures.Through continuous spatiotemporal monitoring,the time-dependent deformation characteristics of surrounding rock,evolution patterns of wave velocity fields,and spatiotemporal distribution modes of microfractures were systematically tracked.Monitoring data revealed that significant deformation of surrounding rock,wave velocity variations,and microseismic activities were observed during the initial stage.These parameters gradually stabilized 11 days after excavation.During this period,the self-bearing capacity of the surrounding rock was maximized,serving as the basis for optimal support timing.Engineering practice verified that the self-supporting capacity of Class II surrounding rock was fully utilized when supports were implemented 11 days post-excavation.This finding provides important references for determining support timing in similar projects.

关 键 词：旭龙水电站 水工隧洞 最佳支护时机 多元监测 围岩损伤 

分 类 号：TV554[水利工程—水利水电工程]