中老铁路达隆一号隧道横洞初支病害整治技术研究

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摘  要：针对中老铁路达隆一号隧道横洞初支大变形等病害问题，分析发生的过程及其原因，提出封闭掌子面及下台阶和上下台阶设钢管支撑结构的临时措施，并就仰拱未施作和施作及初支侵限3种工况提出相应的病害整治措施，建立炭质板岩隧道初支病害整治技术，为今后类似工程提供参考。

关键词：中老铁路；隧道；横洞；大变形；病害；整治技术

中图分类号：U455.49     文献标志码：A          文章编号：2095-2945（2023）34-0019-04

Abstract： In view of the large deformation of the initial support of the Dalong No.1 Tunnel of the China-Laos Railway， the process and causes are analyzed， and the temporary measures for closing the palm face， the lower and upper steps and the upper and lower steps are put forward. In addition， the corresponding disease treatment measures are put forward for the three working conditions of the inverted arch， and the initial support is limited. The treatment technology of the initial branch disease of the carbonaceous slate tunnel is established to provide reference for similar projects in the future.

Keywords： China-Laos Railway; tunnel; cross hole; large deformation; disease; treatment technology

中老铁路是泛亚铁路中线的重要组成部分，由我国提供资金、技术和标准修建。（剩余5226字）