TUNNEL CONSTRUCTION METHOD AND DEVICE Russian patent published in 2005 - IPC

FIELD: mining industry and construction, particularly to construct multipurpose tunnels, and tunneling rigs.

SUBSTANCE: method involves successive tunneling tunnel having variable cross-section and demounting tunneling rig. In going from tunnel section having one cross-section to that having another one the tunneling machine is reset by replacing tunnel profile forming members thereof in mounting chamber constructed in end of the first tunnel section so that the number of above members is constant. The rig comprises load-bearing body with air-tight membrane. Fastened to the body are shield shell composed of head and rear parts, shield hydraulic cylinders, cutting edge and multi-axis executive tool with driving modules. Executive tool housing is made as skeleton grid with rock cutting and mixing members. The grid is arranged in front of geometric diaphragm and is connected to outlet shafts of driving modules by means of crankshafts. Means for transporting cut rock from tunnel face and means for tunnel lining laying are arranged inside the shield shell. The rig has additional system comprising head and rear parts of shield shell, removable cutting edge and skeleton grid having outer cross-sectional outline different from that of similar primary members. Head part of sheet shield is composed of figured covering members in transversal cross-section. The covering members are fastened to load-bearing body along tunnel excavation contour.

EFFECT: possibility to construct tunnel having variable profile.

2 cl, 4 dwg