中文摘要：

在盾构的掘削过程中，刀盘切削矩是一个重要的施工参数，它不仅决定着施工的难易程度，而且还影响着盾构顶进推力、推进速度、刀盘转速、驱动功率等参数。应用数学和力学方法，从土压平衡盾构刀盘的切削工作机理入手，研究刀盘扭矩的计算方法及其影响因素；随后，开展了土压平衡盾构的掘削模型试验，研究在不同埋深、不同刀盘开口率、不同转速以及不同推进速度时刀盘扭矩的变化规律，对前述理论研究成果加以验证，并取得了较为满意的结果。

英文摘要：

The cutting torque is an important construction parameter during tunnelling process by use of shield machines. It not only determines the difficulty degree of construction but also influences other working parameters, such as thrust force, advancing speed, rotation speed and driving power. Based on the cutting mechanism of EPB shield machine, a new reasonable calculation model of cutting torque is presented by applying mathematical and mechanical theories, and its influence factors are then discussed. Subsequently, model experiments on the cutting torque during tunnel excavation with EPB shield machine under different conditions of buried depth, cutter head aperture ratio, rotation speed and advancing speed are carried out. The aforementioned theoretical studies are then verified, and satisfactory results are achieved.