摘要
软岩隧洞变形是西南地区隧洞开挖的常见难题之一。本文围绕九道河隧洞工程,针对Ⅳ类和Ⅴ类围岩洞段,通过分析软弱围岩的地质特征,详细探讨了软弱围岩隧道施工处理措施。九道河隧洞工程遵循"保护围岩、岩变我变,支护宁强勿弱,二衬及早跟进"的原则,充分调动围岩的承载能力,有效控制了围岩变形和松弛,最终确保了隧道施工的顺利进行。其成功经验,可为同类地质条件下的隧道施工提供借鉴。
The deformation of soft rock tunnels is one of the common problems of tunnel excavation in Southwest China.The soft surrounding rock tunnel construction treatment measures are discussed in detail in the paper aiming at Jiudaohe Tunnel Project aiming at IV and V surrounding rock tunnel sections through analyzing the geological characteristics of soft surrounding rock.Jiudaohe Tunnel Project follows the principles of‘surrounding rock protection,change with rock,selection of strong support rather than weak support as well as timely follow-up of the second lining’.The bearing capacity of the surrounding rock should be fully mobilized,thereby controlling deformed and loose surrounding rock effectively,and ensuring smooth tunnel construction finally.The successful experience provides reference for tunnel construction under similar geological conditions.
作者
王有平
WANG Youping(Yunnan Central Water Diversion Project Construction Administration Bureau Chuxiong Branch,Chuxiong 675000,China)
出处
《水利建设与管理》
2022年第1期25-30,共6页
Water Conservancy Construction and Management
关键词
隧道
软岩地层
变形控制
施工技术
tunnel
soft rock stratum
deformation control
construction technology
