盾构机反交错双螺旋线刀具布置形式的研究

总结了盾构机刀盘上刀具布置的基本原则和一般方案,提出了根据最优刀间距和相邻刀具相位差求解一般双螺旋线系数的方法;在此基础上提出了形式完全不同的反交错双螺旋线布置形式,并以狮子洋盾构隧道工程的使用案例对该布置形式进行了详细论述;分析了刀盘正反转情况下不同的破岩次序和破岩效率;以狮子洋隧道工程的实际统计数据为据,发现布置在螺旋线交错处的刀具存在局部磨损突出的现象.刀具反交错螺线型布置使得刀盘在逆时针旋转条件下的破岩效率提高,但刀具磨损快且差异性大.

Study on the shield machine cutters layout with reverse cross double spirals pattern

The basic principle and general scheme of disc cutters layout of shield machines were summarized, and a method of solution for general double spirals coefficients were proposed according to the optimal cutter distance and adjacent cutter phase difference. Consequently, a different layout pattern in double spirals was provided and discussed in detail with the Shiziyang shield tunneling engineering as the case of application. Moreover, the sequence and efficiency of rock breaking when the cutter head rotating normally and reversely were analyzed. Analysis of the statistical data of the Shiziyang tunnel construction shows that there exists a significant local wearing at the crossing of two spirals. The shield cutter layout in reverse cross double spirals pattern can raise the rock broken efficiency when the cutter head rotating reversely, but the cutters will be worn out quickly and unevenly.