为解决盾构施工过程中严重磨损刀具无法及时更换而导致的掘进效率下降问题，建立滚刀磨损量预测模型，以优化施工效率和提高滚刀的利用率。采用等效磨损量辅助分析累计磨损量与掘进参数之间的关系，并扩展数据库预测累计磨损量。通过将兴业快线超大直径盾构隧道工程中的滚刀磨损数据进行分区统计，研究滚刀的磨损类型及变化规律；引入等效磨损量概念，分析其在不同地层下的变化特征，拟合磨损量与掘进参数之间的关系，建立磨损量预测模型。研究发现： 1）工程中的滚刀磨损主要表现为均匀磨损和偏磨，其中偏磨多见于软硬不均地层； 2）滚刀磨损量与安装半径、刀刃宽度、地层类型及掘进距离存在正相关关系； 3）等效磨损量在软土地层中变化平稳，而在软硬不均地层中经历适应、平稳和加剧3个阶段。通过拟合分析，等效磨损量与推力、转矩呈正相关关系。最终通过现场实测数据验证建立的磨损量预测模型的准确性。
During shield tunneling,
failing to replace worn cutters in a timely manner can decrease tunneling
efficiency. To address this, an accurate prediction model for cutter wear is
established, which aims to improve the utilization rate of disc cutters and overall
construction efficiency. This model analyzes the relationship between
cumulative wear and tunneling parameters with the aid of equivalent wear, and
the database is extended to predict cumulative wear. By examining disc cutter
wear data from the large-diameter
shield tunnel project on the Xingye express line in Zhuhai, China, the wear
types and patterns are studied through sectional statistics. The concept of
equivalent wear amount is introduced, and its variation characteristics across
different strata are analyzed. The relationship between wear amount and
excavation parameters is fitted and a wear prediction model is established. The
results show the following: (1) The disc cutter wear mainly manifests as
uniform and partial wear, with partial wear being more prevalent in uneven soft
and hard strata. (2) Disc cutter wear correlates positively with factors such
as installation radius, blade width, formation type, and driving distance. (3)
In a soft soil layer, equivalent wear changes smoothly, whereas in uneven
strata, it progresses through adaptation, stability, and intensification
stages. Fitting analysis shows that equivalent wear positively correlates with
thrust and torque. The feasibility of the wear prediction model is validated
using field measurement data.
