管道更新掘进机刀盘切削钢筋混凝土管道转矩试验研究

为研究掘进机直接切削钢筋混凝土管道，实现管道原位破除更新的可行性，对新型刀盘切削过程中的参数进行分析。通过力学与数学方法，从条齿滚刀切削钢筋混凝土管道机制入手，研究切削转矩的计算方法；设计刀盘试验，系统研究切削参数的变化规律与影响因素，并提出管道更新掘进施工控制指导参数。研究表明： 1）刀盘全断面切削钢筋混凝土管道时，刀盘转矩与时间呈Boltzmann函数关系。2）刀盘推进速度提高，刀盘转矩呈线性增加；刀盘转速提高，刀盘转矩呈先减小后增大的规律。3）结合刀盘切削参数与切削比能，确定8~12 mm/r为较优贯入度区间。

Study on Roadheader Cutterhead Torque for Cutting Reinforced Concrete Pipe

To realize in situ breaking and renewal of a pipe when a roadheader cutting reinforced concrete pipe, the cutting parameters of the roadheader cutterhead are analyzed. Mechanical and mathematical methods are employed to study the calculation method of cutting torque based on the mechanism of reinforced concrete pipe cutting by gear hobs. Finally, a cutterhead test is designed to systematically investigate the variation laws and influencing factors of the cutting parameters and provide parametric guidance for tunneling control. The following results are obtained: (1) The cutterhead torque has a Boltzmann function relationship with time when the cutterhead is cutting full sections of reinforced concrete pipes. (2) The cutterhead torque increases linearly with an increase in advance speed of the cutterhead, and decreases first and then increases with an increase in the rotation speed of the cutterhead. (3) Based on the cutting parameters of the cutterhead and the cutting specific energy, the penetration degree of 8~12 mm/r is determined as the best penetration degree interval.