Auxiliary tunneling apparatus

An auxiliary tunneling apparatus for use in a first tunnel, comprising:

• a travel component configured to allow relocation of the auxiliary tunneling apparatus;
• a support component having a support jack configured to push on a side wall of the first tunnel and configured to fix the auxiliary tunneling apparatus within the first tunnel;
• and
• a reaction force receiver disposed at a first end of the support component in a longitudinal direction of the first tunnel when the reaction force receiver is installed in the first tunnel, the reaction force receiver having a receiver body and a replacement face provided on an opposite side of the receiver body as the side on which the support component is disposed, the replacement face being configured to form a substitute surface corresponding to a portion of a wall surface of a side wall of a second tunnel to be excavated by a boring machine such that the second tunnel intersects the first tunnel, a longitudinal direction of the replacement face extending in a direction that intersects the side wall of the first tunnel when the reaction force receiver is installed in the first tunnel, the replacement face being concave toward the receiver body.

An auxiliary tunneling apparatus configured to be installed in an excavated first tunnel to assist in excavation of a second tunnel intersecting the first tunnel, the excavation of the second tunnel being done with a boring machine configured to perform excavation of a tunnel by rotating a cutter head in a state in which a gripper pushes against a side wall of the tunnel, the auxiliary tunneling apparatus comprising:

• a first reaction force receiver comprising a first receiver body and a first replacement face at one end of the first receiver body, the first replacement face being configured to substitute as a part of a side wall of the second tunnel at an intersection where the first and second tunnels intersect each other during the excavation of the second tunnel by the boring machine, the first replacement face being configured for the gripper of the boring machine to push against the replacement face, the first replacement face having a concave shape that is recessed toward the first receiver body;
• and
• a first split component separate from the reaction force receiver and comprising a first body and a first support jack provided on the first body, the first split component being configured to be arranged inside the first tunnel on a side of the first reaction force receiver opposite the end on which the first replacement face is provided in order to support the first reaction force receiver inside the first tunnel, the first support jack being configured to push against a side wall of the first tunnel and hold the first reaction force receiver inside the first tunnel, the first support jack being configured to be extended toward and retracted from the side wall of the first tunnel.