Provided is a positioner for reinforcing steel bars of tunnel side wall. At least two groups of reinforcing steel bar positioning arm mechanisms are provided on the same side of an inverted trestle (4). The reinforcing steel bar positioning arm mechanism comprises a large arm (1), a medium arm (2) and a small arm (3). The large arm (1) is driven by a first telescopic cylinder (7) to rotate around a hinge point, such that the large arm (1) implements rotation in the horizontal direction. The medium arm (2) is composed of three second telescopic cylinders (8) in a Z-shaped arrangement in the vertical plane, such that the small arm (3) implements rotation or expansion in the vertical plane. Two arm rods of the small arm (3) are each provided with a third telescopic cylinder (9) to implement the expansion of the arm rod.

Provided is a positioner for reinforcing steel bars of tunnel side wall. At least two groups of reinforcing steel bar positioning arm mechanisms are provided on the same side of an inverted trestle (4). The reinforcing steel bar positioning arm mechanism comprises a large arm (1), a medium arm (2) and a small arm (3). The large arm (1) is driven by a first telescopic cylinder (7) to rotate around a hinge point, such that the large arm (1) implements rotation in the horizontal direction. The medium arm (2) is composed of three second telescopic cylinders (8) in a Z-shaped arrangement in the vertical plane, such that the small arm (3) implements rotation or expansion in the vertical plane. Two arm rods of the small arm (3) are each provided with a third telescopic cylinder (9) to implement the expansion of the arm rod.

A trailer of a backup train of a tunnel boring machine includes a rolling means configured to allow movement of the trailer on a circulation route, a chassis including a lower portion including the rolling means and an upper portion, opposite to the rolling means, conveying means, fixed in the lower portion of the chassis, the conveying means being configured to move at least one support along the trailer, the support being configured to transport at least one arch segment along the chassis.

A trailer of a backup train of a tunnel boring machine includes a rolling means configured to allow movement of the trailer on a circulation route, a chassis including a lower portion including the rolling means and an upper portion, opposite to the rolling means, conveying means, fixed in the lower portion of the chassis, the conveying means being configured to move at least one support along the trailer, the support being configured to transport at least one arch segment along the chassis.

A roof mesh installation apparatus for a mining machine includes a mesh roll carried at a dispenser at a forward position of the machine capable of unrolling mesh to be laid and bolted at a tunnel roof. A tensioning device positioned at the dispenser is capable of actuation so as to apply a pre-tension to a forward and unbolted section of mesh with the tension being applied against an already laid and rearward bolted mesh section. Accordingly, an automated roof mesh installation apparatus and method is provided.

A method for repairing in-ground tunnel structures including the steps of: a) cleaning the structure to be lined; b) preparing a sheet of composite liner onto a roller; c) applying resin to the wall of the tunnel; d) dispensing said sheet into said resin using said roller and e) bedding the liner composite into the applied resin. The process can then be repeated along the length of the tunnel in a sheet by sheet fashion.

A method for repairing in-ground tunnel structures including the steps of: a) cleaning the structure to be lined; b) preparing a sheet of composite liner onto a roller; c) applying resin to the wall of the tunnel; d) dispensing said sheet into said resin using said roller and e) bedding the liner composite into the applied resin. The process can then be repeated along the length of the tunnel in a sheet by sheet fashion.

Provided is a positioner for reinforcing steel bars of tunnel side wall. At least two groups of reinforcing steel bar positioning arm mechanisms are provided on the same side of an inverted trestle (4). The reinforcing steel bar positioning arm mechanism comprises a large arm (1), a medium arm (2) and a small arm (3). The large arm (1) is driven by a first telescopic cylinder (7) to rotate around a hinge point, such that the large arm (1) implements rotation in the horizontal direction. The medium arm (2) is composed of three second telescopic cylinders (8) in a Z-shaped arrangement in the vertical plane, such that the small arm (3) implements rotation or expansion in the vertical plane. Two arm rods of the small arm (3) are each provided with a third telescopic cylinder (9) to implement the expansion of the arm rod, and a forth telescopic cylinder (10) is provided between inner side ends of the two arm rods. The small arms (3) of the two groups of the reinforcing steel bar positioning arm mechanisms on the same side are connected to each other through four positioning rods (5), two of the positioning rods (5) are vertically arranged at an interval on the inner side of the small arm (3), and the other two positioning rods (5) are vertically arranged at an interval on the outer side of the small arm (3), with several positioning clamps (6) being fixedly distributed at intervals on each positioning rod (5). The inner layer and outer layer reinforcing steel bars of the side wall can be subjected to three-dimensional positioning at the same time, and in particular, side wall reinforcing steel bars with different heights can be positioned in one process.

An intelligent and flexible steel arch protection device for rockfall and collapse of tunnels, including an arch main body system and a flexible protection system. The arch main body system includes an arched rigid high-strength steel frame and a base. The flexible protection system includes two parallel supporting rods which are oppositely arranged on the steel frame along the circular arc of the arch. Connecting rods are arranged between the two supporting rods at intervals, and the two ends of the connecting rods are fixed to the two supporting rods. The connecting rods are sleeved with guide rods and elastic devices are arranged between the guide rods and the supporting rods. A plurality of rolling shafts vertical to the axial direction of the two-way guide rods and connected with the two-way guide rods are arranged between the adjacent two-way guide rods, and the rolling shafts are sleeved with flexile rollers.

The invention relates to a device for the automated installation of at least one tunnel lining segment of a tunnel lining ring, said device being couplable to a tunnelling machine, having a manipulator with at least one tool for receiving, holding and placing the at least one tunnel lining segment, and with at least one actuator for moving the at least one tool, the at least one tool being movable by means of the at least one actuator in the radial, tangential and/or axial direction in relation to the machine axis of the tunnelling machine in the space of the tunnel section created by the tunnelling machine, having at least one tool position sensor, which is provided on the manipulator and/or tool, for sensing the respective actual position and actual location of the tool in the space of the tunnel section, having at least one tunnel lining segment sensor, which is provided on the manipulator and/or tool, with which an actual position and/or actual location of at least one section of at least one already arranged tunnel lining segment can be sensed, and/or with which an actual position and/or actual location of the tunnel lining segment to be placed can be sensed, having a controller, which accesses installation data of the tunnel lining segments and which accesses the measurement data of the at least one tool position sensor and the at least one tunnel lining segment sensor, and with which the at least one actuator and the at least one tool can be controlled on the basis of the installation data and measurement data in order to move the tool from the receiving position to the target placing position of the respective tunnel lining segment and to orient same in the actual placing position and to arrange same against the at least one already placed tunnel lining segment of the tunnel lining ring, wherein at least two tunnel lining segment sensors are provided, and wherein the tunnel lining segment sensor is a time-of-flight camera.