铁路隧道洞口高陡危岩稳定性分析及加固防护技术  

Stability Analysis and Reinforcement Protection Technology of High and Steep Dangerous Rocks at the Entrance of Railroad Tunnels

作　　者：陈浩[1] 刘维正[2,3] CHEN Hao;LIU Weizheng(China Railway Tunnel Group No.2 Engineering Co.,Ltd.,Sanhe 065201,Hebei,China;School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Research Center of High-speed Railway Construction Technology,Changsha 410075,China)

机构地区：[1]中铁隧道集团二处有限公司,河北三河065201 [2]中南大学土木工程学院,长沙410075 [3]高速铁路建造技术国家工程研究中心,长沙410075

出　　处：《路基工程》2024年第6期226-232,共7页Subgrade Engineering

基　　金：中铁隧道局集团科技创新计划项目(隧研合2015-12)。

摘　　要：针对浩吉铁路高家山隧道洞口段高陡危岩存在落石发育,严重影响线路施工与运营安全的问题,通过三维激光扫描技术得到点云数据,建立危岩体与隧道洞口数值模型,分析危岩落石运动轨迹和边坡的稳定性,并提出针对性防治技术。结果表明:隧道洞口高陡危岩体的发育类型主要为坠落式和倾倒式,最大位移量达到24 mm;危岩失稳后大部分落石会与高家山隧道出口、白水川大桥和薛寿路发生碰撞;采用主动防护网和垫墩式压力注浆锚杆结合技术加固危岩体,采用钢筋混凝土挡墙和被动防护网建立消能降速平台。Aimming at the problem of rockfall development of high and steep dangerous rock at the tunnel entrance of Gaojiashan Tunnel of Haoji Railway,which seriouly affect the safety of the line construction and tunnel operation,the point cloud data were obtained by 3D laser scanning technology,and the numerical model of the dangerous rock and tunnel opening were established by using the point cloud data to analyze the motion track of the falling stones of the dangerous rocks and stability of the slope.The targeted prevention and control technology is proposed.The results show that the development type of high steep dangerous rock at the tunnel entrance is mainly falling and dumping types,and the maximum displacement reaches 24 mm.Most of the falling rocks after the destabilization of the dangerous rocks will collide with the exit of the Gaojiashan Tunnel,Baishuichuan Bridge and Xueshou Road.It is carried out to utilize a combination of Initiative protective systems and pad pillar type pressure grouting anchors to reinforce the dangerous rock,and to use reinforced concrete retaining walls and passive protective systems to establish an energy dissipation and speed reduction platform.

关 键 词：高陡危岩 数值模拟 运动轨迹 围岩加固 综合防治 稳定性 

分 类 号：U25[交通运输工程—道路与铁道工程]