高原铁路隧道洞口浅埋段施工技术

Construction Technology of Shallow Buried Section of the Entrance of Plateau Railway Tunnel Entrance

以某高原铁路隧道工程为例,考虑到洞口浅埋段地质复杂、埋深浅等特殊性,提出洞门结构形式,研究了洞口浅埋段施工技术涉及的关键施工环节和具体施工要点,进而根据拱顶下沉量监控量测数据分析施工效果。实践表明,在合理应用洞口浅埋段施工技术后,能够有效控制拱顶下沉,阻止边坡下滑,保证隧道结构的稳定性,施工效果良好。

Taking a plateau railway tunnel project as an example,considering the particularity of the shallow buried section of the entrance,such as complex geology and shallow buried depth,the tunnel door structure form is proposed,the key construction links and specific construction points involved in the construction technology of the shallow buried section of the entrance are studied,and the construction effect is analyzed according to the monitoring and measurement data of the arch subsidence.The practice shows that reasonable application of the shallow buried section construction technology can effectively control the subsidence of the arch roof,prevent the slope from sliding,ensure the stability of the tunnel structure,and obtain good construction results.