: 为提高软土地层超大直径泥水盾构推力、刀盘转矩计算的准确性,结合苏埃通道超大直径盾构结构特点分析推力、转矩的主 要组成成分,基于开挖面土体分层建立推力、转矩各分项的理论计算模型。 运用MATLAB软件编写推力、转矩的数值计算程序并根 据苏埃通道工程相关参数开展计算。 将依托工程盾构段现场掘进数据与计算结果进行对比,得出如下结论: 1)推力、转矩的实测 值与计算值误差均在±10%内,相对Krause模型或Ugur Ates回归,该计算方法精确度高; 2)在总推力中泥水阻力占比最高,其次为 盾壳与土层的摩擦阻力,而刀具切削阻力占比可忽略; 3)在刀盘转矩中,切削转矩在总转矩中占比最高,其次为刀盘在流体中摩擦 阻力矩,相对推力而言,转矩对地层更加敏感。

The accurate calculation of extra-large diameter slurry shield in soft soil should be improved. As a result, the main components of thrust force and cutterhead torque of extra-large diameter slurry shield used in Su′ai Tunnel are analyzed. A theoretical calculation model for thrust force and cutterhead torque is established based on the soil stratification of tunnel excavation face. A calculation program is developed based on the deduced equations by using MATLAB application and the relative parameters of Su′ai Tunnel. The comparison results between the field data and calculation data show that: (1) The error between field measured data and predicted data of thrust force and torque is less than 10%, which illustrates that the calculation model mentioned-above has a higher accuracy than Krause model and Ugur Ates regression. (2) The proportion of slurry resistance is the highest in total thrust, followed by that of friction resistance between shield shell and soil layer, and that of cutter resistance is little. (3) The cutting torque accounts for the highest proportion of cutterhead torque, followed by that of friction torque between cutterhead and the slurry. The torque is more sensitive to the strata rather than the thrust force.