摘要
针对吉林市北山人防工程改建的四季越野滑雪场工程地质复杂,服务年限较长,大跨度硐室(暴露面积可达2000 m^2以上)稳定性的问题,进行岩体结构的精细化勘查,采用室内岩石力学试验、孔内波速测试分析,基于摄影测量法结合基于孔内雷达和孔内电视的结构面调查等多手段协同测试隧道硐室围岩的表面节理、破碎带、松动圈空间分布等,对围岩质量进行精准分类、分级、分区,确定力学参数,研究围岩稳定性。对大断面硐室进行数值模拟分析计算,圈定其顶板拉应力区,给出加固方案。本研究对同类隧道扩改建工程具有参考意义。
Aiming at the problems of complex engineering geology,long service life and stability of large-span chamber(exposure area up to 2000 m^2 or more)of Beishan cross-country ski resort rebuilt by Jilin Beishan Civil Air Defense Project,refinement investigation of rock mass structure was carried out.The indoor rock mechanics experiment and wave velocity test in borehole were conducted.Structural surfaces investigation based on photogrammetry method combined with the method based on in borehole radar and television was adopted to study the surface joints,fractured zones and spatial distribution of loosening zone of surrounding rock mass.The quality of surrounding rock was classified and zoned,the mechanical parameters were determined,and the stability of surrounding rock was studied.Through numerical simulation analysis and calculation of large-span tunnel,the tension stress zone of roof was delineated,the reinforcement scheme was proposed.This study has reference significance for similar tunnel expansion and reconstruction projects.
作者
高源
杨天鸿
辛全明
刘飞跃
GAO Yuan;YANG Tianhong;XIN Quanming;LIU Feiyue(Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,Liaoning,China;Center of Rock Instability and Seismicity Research,School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,Liaoning,China;China Northeast Architectural Design and Research Institute Co.Ltd.,Shenyang 110006,Liaoning,China)
出处
《隧道与地下工程灾害防治》
2019年第3期109-115,共7页
Hazard Control in Tunnelling and Underground Engineering
基金
中建股份研发计划经费支持项目(CSCEC-2018-Z-23)
国家自然科学基金资助项目(U1710253)
中央高校基本科研业务费资助项目(No.N180105029)
关键词
精细化勘查
大跨度硐室
岩体质量评价
工程岩体分区
围岩稳定性研究
refinement investigation
large-span tunnel
evaluation of rock mass quality
rock mass partition
stability of surrounding rock
