Normal pressure hobbing cutter and teeth cutter exchange technological method for compound stratum shield

Abstract

The invention provides the technical scheme of a normal pressure hobbing cutter and teeth cutter exchange technological method for compound stratum shield. The technological method comprises the following operation steps of cutter drum washing, oil cylinder fixing, cutter drum bolt loosening, oil cylinder retraction, cutter drum hoisting, gate washing, gate closing, balancing of the pressure difference between the interior and the exterior of a gate, oil cylinder thorough retraction, oil cylinder dismounting and temporary storage, cutter drum complete drawing-out, replacement of a tool on a cutter drum and cutter drum mounting. By adoption of the technological method, a normal pressure hobbing cutter replacement technology and a normal pressure hobbing cutter and teeth cutter exchange technology are successfully achieved for the first time, the cutter replacement time is greatly shortened, cost is reduced, and smooth excavation of a shield tunneling machine is ensured.

Description

technical field [0001] The invention relates to a hob-tooth-cutter exchange process method under normal pressure for a complex stratum shield tunneling machine. Background technique [0002] The shield section of the cross-river tunnel project of Wuhan Rail Transit Line 8 has soft soil strata such as silt and fine sand in the whole section, and there are also composite strata with strong water-permeable silt fine sand in the upper part and cemented rock in the lower part. According to the cutting principle of the shield tool, the shield Tunneling in soft soil mainly relies on tooth cutters and scrapers to cut soil, while in rock formations it mainly relies on hobs to cut soil. Whether it is tooth cutter scrapers or hobs, during the construction of mud-water balance shields, the tools are easy to wear. parts and need to be replaced from time to time. The time of tool change is an important factor to determine the speed of tunneling of the whole shield machine. In the previo...

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Problems solved by technology

[0003] (1) Replacing the tool with pressure into the warehouse is extremely risky to the operator, and it is also very harmful to the health of the operator;

[0004] (2) The operator can only work for a short time in the excavation chamber, and it takes a long time to change the cutting tool. Repeated entry and exit of the excavation chamber further increases the time for changing the cutting tool;

[0005] Application No. 201110304204.0 is a back-mounted normal-pressure tool changer for mud-water balance shield machine, a hob normal-pressure tool changer with application No. 201420034202.3, and a detachable normal-pressure tool changer with application No. Knife device, the three patents all involve normal pressure tool changing equipment, but the three equipments are not complete, and none of them involve the hob tooth cutter interchange technology under normal pressure, which is the deficiency of the existing technology

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