隧道洞口挡土墙稳定性及其加固技术研究  

作　　者：黄建秋 向征华 张泉 李春霖 吴钢[2] 

机构地区：[1]中铁五局集团第一工程有限责任公司,长沙410117 [2]长沙理工大学汽车与机械工程学院,长沙410114

出　　处：《科技创新与应用》2024年第2期181-184,共4页Technology Innovation and Application

摘　　要：为研究隧道洞口挡土墙的稳定性,并制定合理的挡土墙加固防护方案,以某隧道横洞为背景,在隧道洞口挡土墙中布置监测点,观测洞口挡土墙的位移及沉降。并通过分析挡土墙失稳的原因,制定采用钢花管灌浆加固、钢筋网片、喷射混凝土等措施加固挡土墙的技术方案。18个监测点被布置在加固后的洞口挡土墙中以观测加固后挡土墙的位移及沉降,对比加固前后的监测结果,加固后洞口挡土墙最危险处位移值和沉降值分别减小86%和64%,挡土墙的位移和沉降的问题得到显著改善,以期为今后类似挡土墙加固防护提供理论参考。In order to study the stability of the retaining wall at the entrance of the tunnel and formulate a reasonable reinforcement and protection scheme for the retaining wall,taking a tunnel as the background,monitoring points are arranged in the retaining wall at the entrance of the tunnel to observe the displacement and settlement of the retaining wall at the entrance.Based on the analysis of the causes of the instability of the retaining wall,the technical scheme of strengthening the retaining wall by steel flower pipe grouting,steel mesh,shotcrete and other measures is made.Eighteen monitoring points are arranged in the reinforced retaining wall to observe the displacement and settlement of the reinforced retaining wall.Compared with the monitoring results before and after reinforcement,the displacement and settlement of the most dangerous part of the reinforced retaining wall are reduced by 86%and 64%respectively,and the displacement and settlement of the retaining wall have been significantly improved,in order to provide theoretical reference for the reinforcement and protection of similar retaining walls in the future.

关 键 词：隧道洞口 挡土墙 稳定性 灌浆加固 监测 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]