摘要
隧道穿越地质断裂带时易发生涌水突泥灾害,以广东省肇庆市某高速公路隧道为工程实例,研究了断裂带富水区隧道的涌水机理、应急处置及安全控制方法。通过现场监测与补充勘察分析,明确了涌水主要来源于断裂带裂隙水、岩溶水及大气降水入渗的耦合作用。针对涌水突泥灾害,提出了“地表防渗—深孔注浆封堵—径向注浆加固—抗水压衬砌”一体化处治方法,并建立了基于超前探水孔出水量的动态分级响应预案。数值模拟结果表明,采用CRD施工与强化支护体系能有效控制围岩变形,拱顶最大位移不超过7.32 mm,结构受力处于安全范围内。工程实践表明,该一体化处治方案取得了良好的防涌效果,可为复杂地质条件下隧道涌水突泥灾害防控提供参考。
When tunnels pass through geological fault zones,water inrush and mud burst disasters are prone to occur.Taking a certain expressway tunnel in Zhaoqing City,Guangdong Province as an engineering example,the water inrush mechanism,emergency response and safety control methods of tunnels in water-rich areas of fault zones were studied.Through on-site monitoring and supplementary geological investigation and analysis,it was clarified that the water inrush mainly originated from the coupled effect of fracture water in the fault zone,karst water and the infiltration of atmospheric precipitation.In response to the disaster,an integrated treatment method of“surface anti-seepage-deep hole grouting sealing-radial grouting reinforcement-water pressure-resistant lining”was proposed,and a dynamic hierarchical response plan based on the water output of advanced water exploration holes was established.The numerical simulation results show that the adoption of CRDconstruction method and reinforced support system can effectively control surrounding rock deformation,with the maximum vault displacement not exceeding 7.32 mm,and the structural force is within the safe range.Engineering practice shows that this integrated treatment plan has achieved good anti-inrush effects and can provide a reference for the prevention and control of water inrush and mud burst disasters in tunnels under complex geological conditions.
作者
资小伟
ZI Xiaowei(Zhaoqing Highway Development Co.,Ltd.,Zhaoqing Guangdong 526000,China)
出处
《广东公路交通》
2025年第6期34-40,共7页
Guangdong Highway Communications
关键词
隧道工程
涌水
地质断裂带
处治技术
CRD施工
tunnel engineering
water inrush
geological fault zone
treatment technology
CRD method
