Tunnel excavation method
AssigneeKomatsu Ltd.
InventorsKazunari Kawai, Shinichi Terada, Yuuichi Kodama, Masaaki Uetake, Hiroshi Asano, Takashi Minami, Junya Tanimoto
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Abstract
This tunnel excavation method includes a step of excavating three first tunnels that are substantially parallel to each other in a first excavation step. Second tunnels are excavated that intersect the first tunnels in a second excavation step. A boring machine is used that performs excavation in a state in which a gripper pushes against the side wall of the tunnel.
Claims9
A tunnel excavation method in which a tunnel is excavated using a boring machine that performs excavation by rotating a cutter head while a gripper of the boring machine pushes against a side wall of the tunnel, the method comprising:
- a first excavation step of excavating at least three first tunnels that are substantially parallel to each other;
- and
- a second excavation step of excavating a second tunnel that intersects and crosses through one of the first tunnels at a first intersection, the second excavation step including disposing first auxiliary tunneling apparatus within the first tunnel at a position corresponding to the first intersection of the first and second tunnels, the first auxiliary tunneling apparatus being equipped with a reaction force receiver that forms a replacement face that substitutes as a part of a side wall of the second tunnel while the boring machine crosses through the first intersection.
A tunnel excavation method in which a tunnel is excavated using a boring machine that performs excavation by rotating a cutter head in a state in which a gripper is pressed against a side wall, the method comprising:
- a first excavation step of excavating a first tunnel;
- a preparation step of preparing a replacement face to substitute as a part of a side wall of a second tunnel at a planned intersection portion between the first tunnel and the second tunnel;
- a relocation step of relocating the replacement face to the planned intersection portion of the first tunnel, and using the replacement face as part of the side wall of the second tunnel;
- and
- a second excavation step of excavating the second tunnel by using the boring machine, and pushing of the gripper against the replacement face and excavating at the planned intersection portion.
Dependencies are inferred from the claim text.