浅埋隧道地表玻璃纤维锚杆加固施工技术研究  

Research on Construction Technology of Shallow Buried Surface Glass Fibre Anchor Reinforcement in Erlang Tunnel

作　　者：朱喊东 Zhu Handong(China Railway 14th Bureau Group Third Engineering Co.Ltd.,Jinan,Shandong 250300)

机构地区：[1]中铁十四局集团第三工程有限公司,山东济南250300

出　　处：《江西建材》2024年第11期354-356,共3页

摘　　要：文中以沪宁合高铁二郎隧道为背景,针对现场工程实例,在分析浅埋隧道地表玻璃纤维锚杆加固原理和加固效果的基础上,探讨软弱围岩浅埋隧道(尤其是洞口段)地表使用玻璃纤维锚杆进行预加固的施工方法、加固效果和经济效益,分析加固所采用的玻璃纤维锚杆的长度、间距和搭接长度等参数对掌子面超前核心土稳定性的影响。为有效控制洞内位移及地表变形控制,通过玻璃纤维锚杆加固掌子面后采用全断面液压破碎锤开挖作业,有效避免开挖后掌子面失稳造成的坍塌等灾害发生,施工安全性大大提高;同时,全断面开挖能采用大型机械作业,有效提高施工工效。Taking Erlang Tunnel of Shanghai-Nanjing High-speed Railway as the background,based on the analysis of the reinforcement principle and reinforcement effect of the surface glass fiber anchor rod in the shallow buried tunnel,the construction method,reinforcement effect and economic benefits of the shallow buried tunnel(especially the entrance section)are discussed.Analyzing the influence of the length,spacing and lap length of the glass fiber bolt on the stability of the core soil in the advance of the shaft surface,in order to effectively control the displacement in the hole and the surface deformation,use hydraulic crushing hammer to reinforce the shaft surface,effectively avoid the collapse of the instability after excavation,greatly improve the construction safety,large machinery can be used for the excavation of the whole section,effectively improve the construction efficiency.

关 键 词：浅埋隧道 玻璃纤维锚杆 软弱围岩 地表加固 

分 类 号：TU74[建筑科学—建筑技术科学]