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我国地铁采用盾构机施工已有十多年,早期投入使用的盾构机已接近设计寿命,使用单位需对其进行整体维修和技术改造,以期恢复使用性能。在改造盾构机过程中,若其关键部件出现故障,可造成重大损失。本文以1台NFM04型泥水平衡盾构机掘进刀盘主轴承密封圈滑环螺栓断裂故障为例,探讨其原因,并提出改进方法。1.维修改造情况该NFM04型泥水平衡盾构机原用于广深港客运专线SDⅢ标段施工,累
Shield construction machine has been used for more than ten years in China’s subway. The shield machine put into operation early is close to the design life, and the unit needs to be repaired and rebuilt in order to restore the service performance. In the process of transforming the shield machine, if the key components of the failure, can cause significant losses. In this paper, a NFM04 mud-water balance shield tunneling cutter main bearing ring slip ring bolt failure as an example, explore its causes and propose improvements. 1. Maintenance and Reconstruction The NFM04 mud-water balance shield machine was originally used for construction of SD-Ⅲ segment of Guangzhou-Shenzhen-Hong Kong Passenger Dedicated Line.