Tunnel boring shield drive - has cutting wheel fitted in shield, arms fitted with cutting tools and work surface supported by cutting wheel

摘要

The support plates (14) against the cutting plane are located behind the cutting wheel (3), and the intermediate spaces (13) of the cutting wheel in front of the support plates open to the work surface form floor material build-up chambers. The cutting wheel is provided with fixed stops (16), against which the support plates in their closed position are subject to the effect of adjusters (15). The intermediate spaces narrow backwards from the work surface (4) to the support plates. The support surfaces are floatingly located, and against the force of the adjustment components are movable parallel in the direction of the shield axis and freely tippable. USE/ADVANTAGE - For tunnel boring where the floor is not solid.