宜万线五爪观隧道无砟道床病害成因分析及整治措施

Analysis on Causes of Diseases in Ballastless Track Bed for Wuzhuaguan Tunnel on Yichang-Wanzhou Railway and the Treatment Measures

针对宜万线五爪观隧道上行线K1161+406段整体道床伸缩缝两端道床板出现宽约0.3mm裂缝,整体道床伸缩缝处出现翻浆冒泥、两轨间伸缩缝已被淘空等病害。在分析其成因的基础上,结合宜万线行车特点,采用特殊施工组织方式,采取有针对性的技术措施进行治理。施工后,通过检测证实,治理效果明显,道床已经稳定。

On the Upline Section Kl161 ＋406 of Wuzhuaguan Tunnel on Yiehang-Wanzhou Railway, cracks arose on the bed slab at both ends of the monolithic bed expansion joint with the width about 0. 3mm, mud pumping occurred at the monolithic bed expansion joint, and the inter-track expansion joint has been undermined. Depending on the cause analysis, the targeted teehnical measures were taken for treatment through combining with running features on Yichang-Wanzhou Railway and by means of special construction organization. The post-construction inspection proves that the treating effeet is significant and the bed has been stable.