某地铁工程盾构机滚刀失效分析

Failure analysis of the disc cutters of TBM in a subway project

随着国内轨道交通建设的不断推进,盾构施工技术的应用越来越广泛。滚刀作为盾构施工的关键零部件,其工作效率和失效形式与施工地质条件有直接关系,并对施工进度和安全性具有重要的影响。以某地铁工程盾构掘进施工为例,分析该区间段复杂的地质条件,根据实际情况分析盾构机在掘进过程中滚刀的失效形式和失效原因,并对刀圈的硬度和材质选择进行简要讨论。结果表明,在该地段施工过程中滚刀的失效形式主要为刀圈偏磨、刀圈卷刃、刀圈断裂、刀圈崩刃、刀圈脱落、刀轴断裂等。

With development of railway transportation,shield tunneling technology has been widely used.As a key component of shield tunneling,the working efficiency and failure form of hob were directly related to the geological conditions and had an important influence on construction schedule and safety.Based on a subway tunneling project,its geology related was analyzed firstly,then the failure types and corresponding causes of the disc cutters were also explained.Finally,a brief discussion was given about the material properties of disc cutters.The results showed that the failure forms were mainly partial grinding,edge curl,fracture of disc cutter ring,cutter ring off,fracture of cutter shaft.