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tunnel boring machine (patent)

US4494799A - Tunnel boring machine - Google Patents

A tunnel boring machine for boring a tunnel through mixed ground with stable ground conditions and unstable ground conditions. The tunnel boring machine is operable in a stable ground boring mode with the machine anchored to tunnel sidewall portions and also in an unstable ground mode wherein cutting thrust is provided by a shield means in cooperation with tunnel lining structure.

Tunnel boring machine - Wikipedia

The tunnel boring machine may also be provided with a rock crusher between the cutting head and the auger to reduce boulders encountered during the tunneling to …

US6017095A - Tunnel boring machine with crusher - Google ...

This invention relates to tunnel boring machines. In one embodiment, the invention relates to a full-face rotary cutterhead, double shield tunnel boring machine that is adapted to bore through a variety of geological structures, ranging from self-supporting rock to that requiring continuous lining support.

US Patent # 4,548,443. Tunnel boring machine - Patents.com

A tunnel boring machine ( TBM ), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They may also be used for microtunneling. They can bore through anything from hard rock to sand.

Tunnel boring machine | Wiki | Everipedia

A machine for mechanical tunnel boring, of the rotating cutter head type, comprising a grid rigid with the cutter head, parallel to the theoretical boring surface, provided with a set of void spaces wherefrom the cutting tools slightly project, said void spaces having a size corresponding to the optimum dimensions of the fragment of mined material.

US Patent for Tunnel boring machines Patent (Patent ...

Excavated tunnel section with Reaming Tunnel Boring Machine and pilot tunnel . A further advantage is the redu-ced energy consumption, as the rock is broken against a free sur-face and, therefore, in coarser cuttings compared to conventio-nal tunnel boring machines.

Subterrene - Wikipedia

A tunnel boring machine for boring a tunnel through mixed ground with stable ground conditions and unstable ground conditions. The tunnel boring machine is operable in a stable ground boring mode with the machine anchored to tunnel sidewall portions and also in an unstable ground mode wherein cutting thrust is provided by a shield means in cooperation with tunnel lining structure.

Reaming Tunnel Boring Machine Undercutting Technique

8/8/1972 · A tunnel boring machine has a carriage which slides along a track. The carriage includes a spindle for attachment to a boring auger, and a power supply which drives the spindle and also drives an hydraulic ram which moves the carriage along the track.

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