某高速铁路隧道无砟轨道上拱处治技术

高速铁路隧道内多铺设无砟轨道,隧道基底受水压影响大,造成的轨道上拱,具有突发、后果严重、整治困难等特性。为更好地研究并解决隧道轨道上拱现象,结合典型轨道上拱案例,通过现场调查、钻孔查验及数值模拟计算等多种方法相结合,系统分析产生原因,得到水压力作用是导致轨道上拱的最大原因。针对现场实际研究情况,提出隧底抗拔锚杆注浆锚固+轨道板钻孔植筋加固的综合整治方案,并提出预防性技术,为类似工程病害处置提供参考。

Treatment Technology for Ballastless Track Uplift of a High Speed Railway Tunnel

Ballastless track is usually laid inside the high-speed railway tunnel. Because of the great influence of water pressure on the foundation of the tunnel,the track tends to uplift,characterized by outburst occurrence,serious consequence and difficult remediation. In order to better solve the impact of track uplift,this paper analyzes the causes of the problems by the combined means of field investigation,drilling inspection and numerical simulation. The main cause is the action of water pressure. According to the results of field research,a comprehensive rectification scheme is proposed,involving the anchor bolt grouting anchorage in the tunnel bottom + reinforcement of steel bars in drill holes of track slabs. And preventive techniques are put forward to provide reference for engineering disaster treatment in similar projects.