Tunnel drive shield
AssigneeGewerkschaft Eisenhutte Westfalia
InventorDieter Stuckmann
Life of this patent
Estimating the term…
Abstract
A tunnel drive shield has an arcuate support frame constituted by a pair of foot segments, a pair of wall segments supported by the foot segments and a ridge segment connecting the tops of the wall segments. The foot segments engage the tunnel floor, and the wall segments are braceable outwardly towards the tunnel walls. Each foot segment is provided with a pair of longitudinal floor skids displaceably mounted on the base thereof. Each foot segment is also provided with a pair of longitudinally-spaced, vertically-movable support feet, which are movable into contact with the tunnel floor to relieve, at least partially, the load on the floor skids. The support feet are used to support the shield while the floor skids are removed. The rest of the shield can then be dismantled within the confines of the tunnel.
Claims26
A tunnel drive shield having an arcuate support frame including a pair of foot segments and a plurality of main segments supported by the foot segments, the foot segments being engageable with the tunnel floor, and the main segments being braceable outwardly towards the tunnel walls, each foot segment being provided with at least one floor skid displaceably mounted on the base thereof, wherein each foot segment is provided with at least one vertical-movable support foot, the support feet being movable into contact with the tunnel floor to relieve, at least partially, the load on the floor skids.
Dependencies are inferred from the claim text.