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复合型盾构机通常的配置方式为:盘型滚刀、刮削刀具。当盾构机在岩石较软的情况下掘进时,由于盘型滚刀与岩石掌子面之间不能产生有效的附着力,将导致滚刀不能滚动而产生弦磨,滚刀不能滚动将失去有效的破岩功能。因此,在较软的岩层中应将部分盘型滚刀更换成可更换齿刀,利用齿刀进行破岩,其破岩轨迹同滚刀相同。针对中心双刃盘型滚刀在全风化岩层不能正常启动、结泥饼的现象,及前期可更换中心齿刀在盾构机施工过程中出现散架的情况,通过对盘型中
Composite shield machine is usually configured as: disc hob, scraping tool. When the shield machine is driven under the condition of rock is soft, no effective adhesion between the disk-type hob and the rock face will result in the hob not being able to roll and the string mill will be generated. The hob can not be rolled and will lose Effective rock breaking function. Therefore, in the softer rock layer should be replaced part of the disc cutter replaceable gear, the use of tooth cutter rock breaking, rock breaking track the same hob. Aiming at the situation that center dual disc cutter can not start normally in fully weathered rock stratum, the phenomenon of knot cake, and the previous replaceable center cutter appear in the construction process of shield machine,