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盾构机在硬岩或自稳能力较强的地段掘进时,因地层本身有自稳能力, 不需要再提供额外的支撑压力对其进行支撑,在这种情况下,人员可在无压力下直接进入刀盘作业;而其在软岩、含水丰富地段掘进时,因地层无自稳能力,盾构机必须提供使地层稳定的支撑压力(EPB)。此时,便需采用带压进舱的模式来进行刀舱内的各项工作。为了确保带压进舱工作人员的安全和有规律地检查刀盘、掌握刀盘及刀具在不同地层中的使用情况, 使换刀作业规律化,避免刀具及刀盘的超常使用,进仓作业需要一套完整、科学、严谨的作业程序。
Shield machine in hard rock or self-stabilizing ability in the area of excavation, the formation itself has the ability to self-stabilize, no need to provide additional support pressure to support it, in this case, the staff can be pressureless Directly into the cutter operation; and its soft rock, water rich sections of the tunneling, due to the formation of self-stability ability, shield machine must provide a stable formation pressure (EPB). At this point, it is necessary to adopt the mode with pressure into the cabin to carry out the work inside the knife compartment. In order to ensure safe and regular inspection of the cutter with pressure cabin crew, to master the use of the cutter head and the cutter in different formations, to make the tool change operation regular and avoid the abnormal use of the cutter and the cutter head, Need a complete, scientific, rigorous operating procedures.