高速铁路隧道预埋槽道高精度快速安装技术研究

Research on High Precision and Rapid Installation Technology of High-speed Railway Tunnel Embedded Channel

近年来,隧道预埋槽道的安装广泛应用于高速铁路隧道接触网的固定基础装置中,为高速铁路隧道接触网的安装提供了可靠保障,亦是高速铁路列车运行重要的安全保障,但是由于目前预埋槽道的安装工艺尚不成熟,且存在诸多弊端:(1)两根槽道不平行;(2)沿隧道横向埋偏;(3)预埋深度不符合要求;(4)二衬混凝土浇筑时,砼侧压力将槽道挤偏,甚至槽道"失踪";(5)槽道安装精度要求高,普通工人难于做到高精度安装,需要专业人员进行;(6)台车顶部空间狭小,且工人在弧面工作平台上操作,安装不便,且不利于安全;(7)当衬砌混凝土存在钢筋工程时,操作空间更是狭小,被迫改变施工工序而影响施工进度等。这些弊端往往导致槽道废弃,造成资源的浪费,甚至影响高速列车安全运营。本次研究针对这些弊端,通过对隧道衬砌台车进行改造,并加工槽道安装模具自动升降系统,以实现低技能、高精度要求安装情况下的可操作性,为今后类似问题提供借鉴。

In recent years, the installation of tunnel pre-buried channel is widely applied in the fixed basic device of high-speed railway tunnel OCS. It provides reliable measures for the installation of high-speed railway tunnel OCS, and is also an important safety guarantee for the operation of high-speed railway train. However, the current technology of installing pre- buried channel is not mature, and there are many drawbacks： ①the two channels are not parallel. ②There is a laterally- buried deviation along the tunnel. ③The embedment depth does not meet the requirements. ④During the pouring construction of second lining concrete, the concrete lateral pressure will squeeze the channel or even lead to the channel ＂disappeared＂. ⑤The groove installation requires high accuracy, which would lead to such difficulties needing professional personnel rather than ordinary ones. ⑥The top space of the car is so narrow that the operation is inconvenient and unsafe while working on the arc platform. （~）When lining concrete is with rehars, the space is more narrow, causing changes for the construction process and construction progress. These disadvantages often lead to waste of the channel and the resources, even affect the safe operation of high-speed trains. This study aimed to solve the problems, through the transformation of the tunnel lining trolley, installation of automatic lifting system to achieve the operation, under the cases of high precision with low skills, which could be served as a reference for similar problems.