Tunnel inverted arch pouring equipment

Abstract

The invention discloses tunnel inverted arch pouring equipment, and relates to the technical field of tunnel construction, and the tunnel inverted arch pouring equipment comprises a tunnel inverted arch trestle, a material distribution system and a pumping system; the tunnel inverted arch trestle comprises a main bridge, a front approach bridge and a rear approach bridge, the main bridge is arranged in an inverted arch steel bar operation area, an inverted arch pouring area and a filling operation area in a spanning mode, the front approach bridge and the rear approach bridge are arranged at the two opposite ends of the main bridge respectively, the front approach bridge is arranged close to the inverted arch excavation supporting operation area, and the rear approach bridge is arranged close to the filling operation area; the material distribution system is arranged on one side of the main bridge and located at the junction of an inverted arch pouring area and a filling operation area, the pumping system is arranged close to the rear approach bridge and used for conveying concrete to the material distribution system, and the material distribution system is used for conveying the concrete to the inverted arch pouring area or the filling operation area; according to the technical scheme, the construction efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to tunnel invert casting equipment. Background Art

[0002] In the field of tunnel construction, the construction of the invert layer is a key link, and its quality directly affects the stability and safety of the tunnel. In the traditional construction process, an invert trestle is erected above the construction section where the invert is being poured to ensure that the invert pouring construction is carried out in an orderly manner. The invert trestle can connect the excavation, initial support and lining construction lines into one, and realize the parallel flow operation of multiple construction processes such as excavation, initial support and secondary lining. However, during the pouring and filling of the invert, the transport vehicle needs to stay on the trestle to release the concrete from the transport vehicle into the invert layer through a chute or other forms. At this time, other vehicles cannot pass on the trestle. The vehicles and materials required for rock drilling, ballast removal, arch installation, and wet spraying in the front face area cannot be reached or transported through the trestle, affecting the progress of the front construction. Summary of the invention

[0003] The main purpose of the invention is to provide a tunnel invert casting device, aiming to improve the construction efficiency.

[0004] To achieve the above-mentioned object, the tunnel invert casting equipment proposed in the present invention is used for the tunnel invert construction section, wherein the tunnel invert construction section includes an invert excavation and support operation area, an invert reinforcement operation area, an invert casting area and a filling operation area which are arranged in sequence, and the tunnel invert casting equipment includes a tunnel invert trestle, a material distribution system and a pumping system; The tunnel inverted arch trestle comprises a main bridge, a front approach bridge and a rear approach bridge, wherein the main bridge is arranged across the inverted arch reinforcement operation area, the inverted arch pouring area and the filling operation area, the front approach bridge and the rear approach bridge are arranged at opposite ends of the main bridge, respectively, the front approach bridge is arranged close to the inverted arch excavation and support operation area, and the rear approach bridge is arranged close to the filling operation area; The concrete distribution system is arranged on one side of the main bridge, the concrete distribution system is located at the junction of the invert casting area and the filling operation area, the pumping system is arranged close to the rear approach bridge, the pumping system is used to transport concrete to the concrete distribution system, and the concrete distribution system is used to transport concrete to the invert casting area or the filling operation area.

[0005] In one embodiment, the material distribution system includes a mounting base, a robotic arm, and a conveying tube; The mounting seat is arranged on the main bridge, the mechanical arm is arranged on the mounting seat, the delivery pipe is arranged on the mechanical arm, and the delivery pipe is communicated with the pumping system; Wherein, one end of the mechanical arm away from the mounting seat can move to the inverted arch casting area and the filling operation area, so that the conveying pipe conveys concrete to the inverted arch casting area or the filling operation area.

[0006] In one embodiment, the pumping system includes a trailer pump and a pump pipe, the pump pipe connects the trailer pump and the delivery pipe, the trailer pump is arranged on a side of the filling operation area away from the invert casting area, and the trailer pump is used to transport concrete in a concrete tank truck to the delivery pipe.

[0007] In one embodiment, the front approach bridge includes two first box girders that are spaced apart, and the invert excavation support operation area is located between the two first box girders.

[0008] In one embodiment, the front approach bridge is paved with an anti-slip layer; and / or An anti-skid layer is paved on the rear approach bridge.

[0009] In one embodiment, the main bridge is a second box beam, and both ends of the second box beam are provided with openings connected to the inner cavity of the second box beam.

[0010] In one embodiment, the tunnel invert casting equipment further comprises an invert covering film, the invert covering film is arranged in the invert casting area, the invert covering film comprises a flat portion and two arc-shaped portions, the two arc-shaped portions are respectively arranged on two opposite sides of the flat portion, and a side of each arc-shaped portion away from the flat portion is connected to the main bridge; The flat portion is formed with a plurality of first openings along the length direction, each of the arc-shaped portions is formed with a plurality of second openings along the length direction, and each of the first openings is located between two of the second openings.

[0011] In one embodiment, the inverted arch membrane further comprises a plurality of baffles, which are all rotatably disposed on the flat portion, a baffle is disposed between each of the second openings and a first opening, and each of the baffles can be rotated to shield a portion of the first opening or a portion of the second opening.

[0012] In one embodiment, the tunnel inverted arch trestle further comprises a movable support leg, wherein the movable support leg is arranged on the main bridge, and the movable support leg is arranged close to the front approach bridge.

[0013] In one embodiment, the tunnel invert trestle further comprises a transverse movement system, and the transverse movement system is arranged on the main bridge.

[0014] In the technical solution of the present invention, the main bridge of the tunnel inverted arch trestle can be used for vehicles and materials to pass through, and the front approach bridge and the rear approach bridge are set to facilitate vehicles to enter and leave the main bridge. At the same time, a material distribution system and a pumping system are set, the material distribution system is located at the junction of the inverted arch pouring area and the filling operation area, and the pumping system is set close to the rear approach bridge. In this way, when it is necessary to pour the inverted arch and fill the inverted arch, the concrete tank truck only needs to travel to the rear of the tunnel inverted arch trestle, and the concrete in the concrete tank truck can be transported to the material distribution system through the pumping system, and then the concrete is transported to the inverted arch pouring area or the filling operation area through the material distribution system, and the inverted arch pouring or filling pouring is carried out accordingly. In this process, the concrete tank truck does not need to stay on the tunnel inverted arch trestle, and other vehicles and materials can pass through the tunnel inverted arch trestle normally, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 A schematic structural diagram of an embodiment of a tunnel invert casting device provided by the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A; Figure 3 A schematic structural diagram of another embodiment of the tunnel invert casting equipment provided by the present invention; Figure 4 A schematic structural diagram of another embodiment of the tunnel invert casting equipment provided by the present invention; Figure 5 for Figure 4 Schematic diagram of the structure of the middle inverted arch membrane; Figure 6 This is a structural diagram of the cloth system.

[0017] Description of Figure Numbers: 1000. Tunnel invert casting equipment; 100. Invert excavation and support operation area; 200. Invert reinforcement operation area; 300. Invert casting area; 400. Filling operation area; 1. Main bridge; 2. Front approach bridge; 3. Rear approach bridge; 4. Material distribution system; 41. Mounting seat; 42. Mechanical arm; 43. Delivery pipe; 5. Pumping system; 51. Drag pump; 52. Pump pipe; 6. Invert coating; 61. First opening; 62. Baffle; 7. Movable support leg; 8. Front support leg; 9. Concrete tank truck.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The present invention provides a tunnel invert casting device 1000, which is used in a tunnel invert construction section. The tunnel invert construction section includes an invert excavation and support operation area 100, an invert reinforcement operation area 200, an invert casting area 300 and a filling operation area 400 which are arranged in sequence.

[0023] See also Figures 1 to 4In one embodiment of the present invention, the tunnel invert casting equipment 1000 includes a tunnel invert trestle, a material distribution system 4 and a pumping system 5; the tunnel invert trestle includes a main bridge 1, a front approach bridge 2 and a rear approach bridge 3, the main bridge 1 is arranged across the invert reinforcement operation area 200, the invert casting area 300 and the filling operation area 400, the front approach bridge 2 and the rear approach bridge 3 are respectively arranged at opposite ends of the main bridge 1, the front approach bridge 2 is arranged close to the invert excavation and support operation area 100, and the rear approach bridge 3 is arranged close to the filling operation area 400; the material distribution system 4 is arranged on one side of the main bridge 1, the material distribution system 4 is located at the junction of the invert casting area 300 and the filling operation area 400, the pumping system 5 is arranged close to the rear approach bridge 3, the pumping system 5 is used to transport concrete to the material distribution system 4, and the material distribution system 4 is used to transport concrete to the invert casting area 300 or the filling operation area 400.

[0024] In the technical solution of the present invention, the main bridge 1 of the tunnel inverted trestle can be used for vehicles and materials to pass through, and the front approach bridge 2 and the rear approach bridge 3 are arranged to facilitate vehicles to enter and leave the main bridge 1. At the same time, a material distribution system 4 and a pumping system 5 are arranged, and the material distribution system 4 is located at the junction of the inverted arch pouring area 300 and the filling operation area 400, and the pumping system 5 is arranged near the rear approach bridge 3. In this way, when it is necessary to perform inverted arch pouring and filling pouring, the concrete tank truck 9 only needs to travel to the rear of the tunnel inverted arch trestle, and the concrete in the concrete tank truck 9 can be transported to the material distribution system 4 through the pumping system 5, and then the concrete is transported to the inverted arch pouring area 300 or the filling operation area 400 through the material distribution system 4, and the inverted arch pouring or filling pouring is performed accordingly. In this process, the concrete tank truck 9 does not need to stay on the tunnel inverted arch trestle, and other vehicles and materials can pass through the tunnel inverted arch trestle normally, thereby improving construction efficiency.

[0025] Specifically, in one embodiment of the present invention, please refer to Figure 4 and Figure 6 The material distribution system 4 includes a mounting seat 41, a mechanical arm 42 and a conveying pipe 43; the mounting seat 41 is arranged on the main bridge 1, the mechanical arm 42 is arranged on the mounting seat 41, the conveying pipe 43 is arranged on the mechanical arm 42, and the conveying pipe 43 is connected with the pumping system 5; wherein, one end of the mechanical arm 42 away from the mounting seat 41 can move to the invert casting area 300 and the filling operation area 400, so that the conveying pipe 43 conveys concrete to the invert casting area 300 or the filling operation area 400.

[0026] The installation of the mounting seat 41 facilitates the installation of the mechanical arm 42. The specific type of the mechanical arm 42 can be selected from the prior art, and it can drive the conveying pipe 43 to move. Through the mobility of the mechanical arm 42, the material distribution system 4 can flexibly extend the conveying pipe 43 to the inverted arch pouring area 300 and the filling operation area 400, so that it can quickly switch between different areas, improving the flexibility and efficiency of construction. By setting the range of motion of the mechanical arm 42, the material distribution system 4 can work without occupying the bridge deck of the tunnel inverted arch trestle, allowing other vehicles and materials to pass normally on the tunnel inverted arch trestle, thereby reducing traffic interference during the construction process and ensuring the construction efficiency of other locations. At the same time, through the cooperation of the mechanical arm 42 and the conveying pipe 43, the process of direct manual participation in concrete transportation is reduced, and the safety risk of construction personnel is reduced. In other embodiments, the material distribution system 4 can be set in two groups, and the two groups of material distribution systems 4 are respectively set on both sides of the main bridge 1, one group is set corresponding to the inverted arch pouring area 300, and the other group is set corresponding to the filling operation area 400. The two groups of material distribution systems 4 cooperate in construction, which can improve construction efficiency.

[0027] Specifically, in one embodiment of the present invention, please refer to Figure 3 The pumping system 5 includes a drag pump 51 and a pump pipe 52. The pump pipe 52 connects the drag pump 51 and the delivery pipe 43. The drag pump 51 is arranged on the side of the filling operation area 400 away from the inverted arch casting area 300. The drag pump 51 is used to deliver the concrete in the concrete tank truck 9 to the delivery pipe 43. The cooperation of the drag pump 51 and the pump pipe 52 can quickly deliver the concrete in the concrete tank truck 9 to the delivery pipe 43. The setting of the pumping system 5 can ensure the uniformity and continuity of the concrete, which helps to improve the density and uniformity of the inverted arch casting, thereby improving the construction quality. Through the cooperation of the drag pump 51 and the pump pipe 52, the concrete in the concrete tank truck 9 can be delivered to the material distribution system 4, so that during the construction process, the concrete tank truck 9 does not need to stay on the tunnel inverted arch trestle, and will not occupy the tunnel inverted arch trestle bridge deck, allowing other vehicles and materials to pass normally on the tunnel inverted arch trestle, thereby reducing traffic interference during the construction process and ensuring the construction efficiency of other positions. In other embodiments, a pump truck can also be used to cooperate with the pump pipe 52 to deliver concrete.

[0028] In order to ensure stability, in one embodiment of the present invention, the front approach bridge 2 includes two first box beams arranged at intervals, and the arch excavation support operation area 100 is located between the two first box beams. The box beam structure has good integrity and high torsional rigidity, and is suitable as the main structure of the front approach bridge 2, and can provide better stability and bearing capacity. In addition, the box beam structure occupies a small space and has good permeability. At the same line design elevation, the clearance under the bridge is high. At the same time, the design of the front approach bridge 2 forms a safe area between the arch excavation support operation area 100 and the box beam, which helps to improve the stress condition of the surrounding rock, control the deformation of the surrounding rock, and ensure construction safety.

[0029] Furthermore, in one embodiment of the present invention, an anti-skid layer is provided on the front approach bridge 2, and the anti-skid layer can increase the friction coefficient of the bridge deck and improve driving safety. An anti-skid layer is also provided on the rear approach bridge 3 to increase the friction coefficient of the bridge deck and improve driving safety. The anti-skid layer can be formed by laying fine stone concrete on the front approach bridge 2 and the rear approach bridge 3, or a plurality of spaced steel bars can be provided to form the anti-skid layer.

[0030] Specifically, in one embodiment of the present invention, the main bridge 1 is a second box beam, and both ends of the second box beam are provided with openings connected to the inner cavity of the second box beam. The box beam structure has good integrity and high torsional rigidity, and can provide better stability and bearing capacity. The openings at both ends of the second box beam are connected to the inner cavity of the second box beam, thus forming a channel that can be passed by construction workers, making it convenient for construction workers to transfer between different work areas. The second box beam uses a large-section box beam, which can directly allow vehicles to pass through without the need to set up an additional bridge deck structure.

[0031] In order to ensure the pouring effect, in one embodiment of the present invention, please refer to Figures 3 to 5 The tunnel invert casting equipment 1000 also includes an invert film 6, which is arranged in the invert casting area 300. The invert film 6 includes a flat part and two arc parts, which are respectively arranged on two opposite sides of the flat part, and the side of each arc part away from the flat part is connected to the main bridge 1; wherein, the flat part is formed with a plurality of first openings 61 along the length direction, and each arc part is formed with a plurality of second openings along the length direction, and each first opening 61 is located between the two second openings. The invert film 6 is composed of a flat part and two arc parts, and this design can well adapt to the geometric shape of the invert casting area 300, ensuring the uniformity and continuity of concrete casting. The plurality of first openings 61 and second openings formed in the flat part and the arc part along the length direction enable the concrete to be directly transported to the casting area through the first openings 61 and the second openings, thereby improving the construction efficiency. At the same time, the design of the invert film 6 helps to control the casting shape and density of the concrete, and enables the invert concrete to be cast and formed in one time, thereby improving the integrity of the structure.

[0032] Further, in one embodiment of the present invention, please refer to Figure 5 The inverted arch membrane 6 also includes a plurality of baffles 62, which are all rotatably disposed on the flat portion. A baffle 62 is disposed between each second opening and a first opening 61, and each baffle 62 can be rotated to shield part of the first opening 61 or shield part of the second opening.

[0033] The setting of the baffle 62 can change the opening length of the first opening 61. For example, when two baffles 62 cover the same first opening 61, the opening length of the first opening 61 is 2m. When the two baffles 62 are rotated to cover the corresponding second opening, the opening length of the first opening 61 is 3m, which can facilitate the rapid pouring of concrete in the middle. By setting the baffle 62, the size of the first opening 61 can be designed to be larger, and the corresponding weight of the inverted arch covering 6 is lighter, reducing the material cost. At the same time, during construction, the buoyancy pressure generated by the concrete at the position corresponding to the first opening 61 is increased. In this way, the size of the first opening 61 is designed to be larger, which can reduce the buoyancy of the inverted arch covering mold by the concrete during the inverted arch construction, and correspondingly, the number of inverted arch covering mold reinforcement rods can be reduced, thereby speeding up the construction speed.

[0034] Further, in one embodiment of the present invention, please refer to Figure 2 The tunnel inverted arch trestle also includes a movable support leg 7, which is arranged on the main bridge 1 and is arranged near the front approach bridge 2. The arrangement of the movable support leg 7 can make the tunnel inverted arch trestle have a self-propelled function. The movable support leg 7 usually uses a hydraulic cylinder as a drive to ensure stability. Correspondingly, the tunnel inverted arch trestle is also provided with a front supporting leg 8, which is arranged on the main bridge 1 and the front approach bridge 2 is rotated to the front supporting leg 8. When the tunnel inverted arch trestle needs to move, the front approach bridge 2 can be rotated so that the front approach bridge 2 does not contact the ground, so as to facilitate the movement of the tunnel inverted arch trestle. In addition, a rear walking mechanism can be arranged at a position close to the rear approach bridge 3 to cooperate with the movable support leg 7 to realize the movement of the tunnel inverted arch trestle.

[0035] In order to improve flexibility, in one embodiment of the present invention, the tunnel inverted arch trestle also includes a transverse movement system, which is arranged on the main bridge 1. The transverse movement system includes a front transverse movement system and a rear transverse movement system, the front transverse movement system is arranged near the front approach bridge 2, and the rear transverse movement system is arranged near the rear approach bridge 3. The transverse movement system enables the tunnel inverted arch trestle to move laterally in the tunnel to adjust the position, which is suitable for different construction work requirements. At the same time, in conjunction with the movable support legs 7 and the rear walking mechanism, the tunnel inverted arch trestle can move in all directions to ensure accurate construction positioning.

[0036] In this embodiment, the material distribution system 4 is arranged on one side of the main bridge 1, and the material distribution system 4 is connected to the drag pump 51 behind the tunnel inverted arch trestle through the pump pipe 52. When the inverted arch is poured and filled, the concrete tank truck 9 pours concrete into the hopper of the drag pump 51 behind the tunnel inverted arch trestle, and the drag pump 51 pumps the concrete to the material distribution system 4 through the pump pipe 52. The construction personnel control the movement of the material distribution system 4 to accurately deliver the loaded concrete to the pouring position. In this process, the concrete tank truck 9 does not need to stay on the tunnel inverted arch trestle, and other vehicles and materials can pass through the tunnel inverted arch trestle normally, thereby improving the construction efficiency.

[0037] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A tunnel invert casting equipment, used for a tunnel invert construction section, wherein the tunnel invert construction section comprises an invert excavation and support operation area, an invert reinforcement operation area, an invert casting area and a filling operation area which are arranged in sequence, characterized in that: The tunnel invert casting equipment includes a tunnel invert trestle, a material distribution system and a pumping system; The tunnel inverted arch trestle comprises a main bridge, a front approach bridge and a rear approach bridge, wherein the main bridge is arranged across the inverted arch reinforcement operation area, the inverted arch pouring area and the filling operation area, the front approach bridge and the rear approach bridge are arranged at opposite ends of the main bridge, respectively, the front approach bridge is arranged close to the inverted arch excavation and support operation area, and the rear approach bridge is arranged close to the filling operation area; The concrete distribution system is arranged on one side of the main bridge, the concrete distribution system is located at the junction of the invert casting area and the filling operation area, the pumping system is arranged close to the rear approach bridge, the pumping system is used to transport concrete to the concrete distribution system, and the concrete distribution system is used to transport concrete to the invert casting area or the filling operation area.

2. The tunnel invert casting equipment according to claim 1, characterized in that: The material distribution system includes a mounting base, a mechanical arm and a conveying pipe; The mounting seat is arranged on the main bridge, the mechanical arm is arranged on the mounting seat, the delivery pipe is arranged on the mechanical arm, and the delivery pipe is communicated with the pumping system; Wherein, one end of the mechanical arm away from the mounting seat can move to the inverted arch casting area and the filling operation area, so that the conveying pipe conveys concrete to the inverted arch casting area or the filling operation area.

3. The tunnel invert casting equipment according to claim 2, characterized in that: The pumping system includes a trailer pump and a pump pipe, wherein the pump pipe connects the trailer pump and the delivery pipe, and the trailer pump is arranged at a side of the filling operation area away from the invert casting area, and is used to deliver concrete in a concrete tank truck to the delivery pipe.

4. The tunnel invert casting equipment according to any one of claims 1 to 3, characterized in that: The front approach bridge comprises two first box beams which are spaced apart from each other, and the invert excavation and support operation area is located between the two first box beams.

5. The tunnel invert casting equipment according to any one of claims 1 to 3, characterized in that: The front approach bridge is paved with an anti-skid layer; and / or An anti-skid layer is paved on the rear approach bridge.

6. The tunnel invert casting equipment according to any one of claims 1 to 3, characterized in that: The main bridge is a second box beam, and both ends of the second box beam are provided with openings connected to the inner cavity of the second box beam.

7. The tunnel invert casting equipment according to any one of claims 1 to 3, characterized in that: The tunnel invert casting equipment further comprises an invert covering film, which is arranged in the invert casting area, and comprises a flat portion and two arc-shaped portions, wherein the two arc-shaped portions are respectively arranged on two opposite sides of the flat portion, and a side of each arc-shaped portion away from the flat portion is connected to the main bridge; The flat portion is formed with a plurality of first openings along the length direction, each of the arc-shaped portions is formed with a plurality of second openings along the length direction, and each of the first openings is located between two of the second openings.

8. The tunnel invert casting equipment according to claim 7, characterized in that: The inverted arch membrane also includes a plurality of baffles, which are all rotatably disposed on the flat portion, a baffle is disposed between each of the second openings and a first opening, and each of the baffles can be rotated to shield part of the first opening or shield part of the second opening.

9. The tunnel invert casting equipment according to any one of claims 1 to 3, characterized in that: The tunnel inverted arch trestle also includes a movable support foot, which is arranged on the main bridge and is arranged close to the front approach bridge.

10. The tunnel invert casting equipment according to any one of claims 1 to 3, characterized in that: The tunnel inverted arch trestle also includes a transverse movement system, and the transverse movement system is arranged on the main bridge.

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