Tunnel steel bar trolley with single-layer pull net and construction method of tunnel steel bar trolley

Abstract

The invention discloses a tunnel reinforcing steel bar trolley with a single-layer pull net and a construction method of the tunnel reinforcing steel bar trolley. The trolley comprises a portal assembly, a feeding mechanism and a supporting mechanism. The feeding mechanism comprises arch-shaped rails arranged at the two ends of the portal assembly, first telescopic arms connected to the two arch-shaped rails in a sliding mode and a reinforcing steel bar clamping unit connected to the two first telescopic arms, and a plurality of reinforcing steel bar clamping stations are arranged on the reinforcing steel bar clamping unit in the longitudinal direction of the portal assembly at intervals. The supporting mechanisms are arranged on the portal assembly at intervals in the circumferential direction and comprise supporting rods and at least two second telescopic arms, the fixed ends of the second telescopic arms are connected to the portal assembly at intervals in the longitudinal direction, the supporting rods are connected with the telescopic ends of the second telescopic arms, and a plurality of steel bar positioning stations are arranged on the supporting rods at intervals in the longitudinal direction. The device is applied to the technical field of tunnel construction, laying and binding of outer-layer reinforcing steel bars and inner-layer reinforcing steel bars can be conducted in sequence through the single-layer pulling net, operation is convenient and safe, and the quality requirement for reinforcing steel bar binding can be effectively met.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to a single-layer mesh tunnel reinforcement trolley and its construction method. Background Technology

[0002] In tunnel engineering using the drill-and-blast method, secondary lining is a crucial core process in the construction workflow. Before carrying out secondary lining work, the binding of secondary lining reinforcement is essential, and its installation accuracy and work efficiency directly affect the overall construction quality and progress of the project.

[0003] The installation structure of the tunnel secondary lining reinforcement includes the outer and inner circumferential reinforcement, the outer and inner longitudinal reinforcement, and the hook bars connecting the inner and outer reinforcement. The circumferential reinforcement, longitudinal reinforcement, and hook bars are all fixed together with wire. Due to the complex construction environment and numerous influencing factors, this process is currently carried out mainly by manual labor, supplemented by mechanical assistance.

[0004] In the current manual tying process for secondary lining reinforcement, the transport of longitudinal reinforcement requires multiple workers to lift and pass it from the ground to the first-floor platform, then relay it to the second-floor platform, and finally deliver it to each working platform through multiple rounds of lifting and handover. The installation of circumferential reinforcement requires multiple workers distributed across the various platforms of the trolley to jointly lift and arch it, then drag the reinforcement to connect the two ends with the inverted arch reinforcement. This work mode is not only extremely labor-intensive but also carries a high risk factor. Furthermore, manually tied secondary lining reinforcement often fails to meet the preset dimensional requirements, typically requiring significant manpower and time for secondary adjustments after tying.

[0005] While mechanically assisted tunnel rebar tying equipment has played a role in reducing labor intensity and improving tying quality, its limitations inherent in the construction method itself mean that it cannot provide sufficient working space for workers when tying longitudinal rebars. This directly slows down the longitudinal rebar tying process and consequently reduces the overall rebar tying efficiency. Furthermore, this method employs simultaneous tying of two layers of circumferential rebars. When the lining thickness is large, tying the outer circumferential rebars is not only extremely inconvenient for workers but also poses significant safety hazards. Summary of the Invention

[0006] To address the shortcomings of the existing technology, this invention provides a tunnel reinforcement trolley with a single-layer mesh and its construction method. The outer and inner layers of reinforcement can be laid and tied sequentially using a single-layer mesh, which is not only convenient and safe to operate, but also effectively meets the quality requirements of reinforcement tying.

[0007] To achieve the above objectives, the present invention provides a single-layer mesh tunnel rebar trolley, including a gantry assembly and a loading mechanism, a support mechanism and an auxiliary mechanism provided on the gantry assembly; The feeding mechanism includes arched tracks at both ends of the gantry assembly, first telescopic arms slidably connected to the two arched tracks, and a steel bar clamping unit connected to the two first telescopic arms. The steel bar clamping unit is provided with a plurality of steel bar clamping stations spaced apart along the longitudinal direction of the gantry assembly. The number of the support mechanisms is multiple, and each of the support mechanisms is spaced apart circumferentially on the gantry assembly; The support mechanism includes a strut and at least two second telescopic arms. The fixed ends of each second telescopic arm are longitudinally spaced and connected to the gantry assembly. The strut is connected to the telescopic ends of each second telescopic arm. The strut is provided with a number of steel bar positioning positions longitudinally spaced. The auxiliary mechanism includes a slide rail, a slide block, a cantilever, and a crane. The slide rail is longitudinally arranged on the loading side of the gantry assembly. The slide block is slidably connected to the slide rail. One end of the cantilever is rotatably connected to the slide block, and the crane is located at the other end of the cantilever.

[0008] In one embodiment, the rebar clamping unit includes a feeding longitudinal beam, the first side of which is connected to the first telescopic arm; The second side of the feeding longitudinal beam is provided with several connecting buckles spaced longitudinally to serve as the steel bar clamping station.

[0009] In one embodiment, a positioning plate is provided on the second side of the feeding longitudinal beam along the longitudinal direction, and the positioning plate is provided with positioning slots that correspond one-to-one with the steel bar clamping station.

[0010] In one embodiment, the feeding longitudinal beam is provided with multiple grooved frames spaced longitudinally for placing longitudinal reinforcing bars.

[0011] In one embodiment, the rebar positioning station is an annular groove provided on the support rod.

[0012] In one embodiment, the tunnel reinforcement trolley also includes a drive chain, and end platforms are provided on the crossbeams at both ends of the gantry assembly. Furthermore, extension rods extending toward the end platforms are provided at two positions on the inner side of the arched track that are at the same height as the end platforms. Both end platforms are equipped with a power assembly, which includes a power mechanism on the end platform and a drive sprocket at the output end of the power mechanism. Driven sprockets are rotatably connected to the outer walls of the crossbeams at both ends of the gantry assembly. The transmission chain is wound around the arched track and the extension rod. The two ends of the transmission chain are respectively connected to the two ends of the first telescopic arm, and the transmission chain meshes with the driving sprocket and the driven sprocket.

[0013] In one embodiment, the fixed end of the first telescopic arm is provided with a slide table, which is slidably connected to the outside of the arched track, and the two ends of the transmission chain are respectively connected to the two ends of the slide table.

[0014] In one embodiment, the outputs of the two power mechanisms are connected by a synchronous shaft.

[0015] In one embodiment, the gantry assembly has a first working platform and a second working platform that can extend laterally on both sides, and the second working platform is located above the first working platform. The first working platform has a first working ladder group extending to the ground, and a second working ladder group is provided between the first working platform and the second working platform.

[0016] In one embodiment, a third working platform is provided on the top of the gantry assembly, and the two sides of the third working platform are respectively connected to two second working platforms through a third working ladder group. A fourth working ladder group is provided between the third working platform and the crossbeam of the gantry assembly.

[0017] To achieve the above objectives, the present invention also provides a construction method for the above-mentioned tunnel reinforcement trolley, comprising the following steps: Multiple outer circumferential reinforcing bars, inner circumferential reinforcing bars, outer longitudinal reinforcing bars, and inner longitudinal reinforcing bars are placed on the tunnel pavement on the material loading side; Adjust the position of the trolley so that the center of the trolley coincides with the center of the tunnel. After adjusting the feeding mechanism to the feeding side, align each steel bar clamping station on the steel bar clamping unit with each outer layer inverted arch steel bar on the feeding side. Multiple outer longitudinal steel bars are stored in the trench frame on the steel bar clamping unit along the longitudinal direction of the tunnel, and the first ends of multiple outer circumferential steel bars are respectively connected to the steel bar clamping station. The rebar clamping unit slides along the arched track, pulling multiple outer circumferential rebars to be supported in an arc shape on the trolley. Simultaneously, the following operations are performed as the rebar clamping unit slides along the arched track: After each support mechanism is passed by the rebar clamping unit, the corresponding support mechanism extends to support the multiple outer circumferential rebars passing through that position, so that the arc-shaped outline of the outer circumferential rebars corresponds to the required binding outline, and the longitudinal equidistant arrangement of the outer circumferential rebars is achieved by using the rebar positioning station on the support mechanism. As the rebar clamping unit passes through the working platform of each area on the gantry assembly, the required outer longitudinal rebar in the corresponding area is removed and placed on the working platform. The drive bar clamping unit slides along the arched track to the docking side. After the first end of the outer circumferential bar is removed from the bar clamping station, the first ends of multiple outer circumferential bars pass through the corresponding positioning slots on the bar clamping unit and are then docked one by one with the outer inverted arch bars on the docking side. During docking, the crane is used to pull the corresponding outer circumferential bars upward from the loading side. Afterwards, or simultaneously, the second end of the outer circumferential reinforcement is connected to the outer arch reinforcement on the feeding side, and the outer longitudinal reinforcement is installed to complete the binding of the outer reinforcement. After completing the binding of the outer layer of reinforcing bars, retract each support mechanism and drive the reinforcing bar clamping unit back to the feeding side, then complete the binding of the inner layer of reinforcing bars using the same operating steps.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: 1. This invention achieves convenient feeding of inner and outer circumferential reinforcing bars through the cooperation of the feeding mechanism and the support mechanism. The outer and inner reinforcing bars can be laid and tied sequentially through a single-layer mesh. The telescopic function of the support mechanism supports the inner and outer circumferential reinforcing bars, allowing them to be supported in an arc shape on the trolley according to the actual tying contour. At the same time, the reinforcing bar positioning station on the support mechanism can ensure that the inner and outer circumferential reinforcing bars are distributed longitudinally at equal intervals, thereby effectively meeting the quality requirements of reinforcing bar tying. 2. In the preferred embodiment of the present invention, a positioning plate is provided on the second side of the feeding longitudinal beam along the longitudinal direction, and a positioning slot corresponding to the steel bar clamping station is provided on the positioning plate. This not only allows the positioning of the circumferential steel bar before it is connected with the inverted arch steel bar, thus aligning the circumferential steel bar with the inverted arch steel bar, but also allows the positioning plate to serve as a support platform for workers when the circumferential steel bar and the inverted arch steel bar are connected. This not only makes the operation convenient, but also effectively ensures the safety of construction. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is an isometric view of the tunnel rebar trolley without schematic auxiliary mechanisms in this embodiment of the invention; Figure 2 This is a front view of the tunnel rebar trolley without schematic auxiliary mechanisms in an embodiment of the present invention; Figure 3 This is an isometric view of the gantry assembly in an embodiment of the present invention; Figure 4 This is an isometric view of the feeding mechanism in an embodiment of the present invention; Figure 5 This is a partial schematic diagram of the powertrain in an embodiment of the present invention; Figure 6 This is a schematic diagram of the transmission chain's path in an embodiment of the present invention; Figure 7 This is an isometric view of the rebar clamping unit in an embodiment of the present invention; Figure 8 This is an isometric view of the support mechanism in an embodiment of the present invention; Figure 9 This is an isometric view of the auxiliary mechanism of the tunnel rebar trolley in an embodiment of the present invention; Figure 10 This is a front view of the auxiliary mechanism of the tunnel rebar trolley in an embodiment of the present invention; Figure 11 This is a side view of the auxiliary mechanism of the tunnel rebar trolley in an embodiment of the present invention; Figures 12 to 15 This is a schematic diagram illustrating the process of binding the outer layer of steel bars using a tunnel steel bar trolley in an embodiment of the present invention; Figures 16 to 18 This is a schematic diagram illustrating the process of tying inner layer steel bars using a tunnel steel bar trolley in an embodiment of the present invention; Figure 19 This is a schematic diagram of the tunnel reinforcement trolley after completing the binding of the secondary lining reinforcement in an embodiment of the present invention.

[0021] Reference numerals: 1. Gantry crossbeam; 2. Gantry column; 3. Gantry longitudinal beam; 4. Support side column; 5. Intermediate crossbeam; 6. Maintenance platform; 7. Traveling mechanism; 8. First working platform; 9. Second working platform; 10. Vertical support beam; 11. Diagonal support beam; 12. Third working platform; 13. First working ladder assembly; 14. Second working ladder assembly; 15. Third working ladder assembly; 16. Fourth working ladder assembly; 17. Arched track; 18. First telescopic boom; 19. Rebar clamping unit. 1901 Rebar clamping station, 1902 Feeding longitudinal beam, 1903 Positioning plate, 1904 Trenching frame, 20 Slide table, 21 End platform, 22 Extension rod, 23 Support, 24 Power mechanism, 25 Drive sprocket, 26 Driven sprocket, 27 Transmission chain, 28 Synchronous shaft, 29 Support mechanism, 29 Support rod, 2901 Second telescopic arm, 2902 Rebar positioning station, 2903 Slide rail, 30 Slide seat, 31 Cantilever, 32 Crane.

[0022] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0025] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0028] Example 1 like Figure 1 , Figure 2 The image shows a single-layer mesh tunnel reinforcement trolley disclosed in this embodiment, which mainly includes a gantry assembly, as well as a loading mechanism, a support mechanism 29 and an auxiliary mechanism provided on the gantry assembly.

[0029] refer to Figure 2 , Figure 3The gantry assembly includes two gantry frames spaced apart along the longitudinal direction of the tunnel. Each gantry frame includes a gantry beam 1 and gantry columns 2 connected to both ends of the gantry beam 1. The two gantry columns 2 on the same side are connected by at least two vertically spaced gantry beams 3. A supporting side column 4 connects two adjacent gantry beams 3 on the same side. At least one intermediate crossbeam 5 is spaced along the longitudinal direction of the tunnel between the two uppermost gantry beams 3 on both sides. A maintenance platform 6 is provided between the two gantry beams 1 and on the intermediate crossbeam 5. A traveling mechanism 7 is provided at the bottom of the gantry columns 2 to drive the entire rebar working trolley.

[0030] The gantry assembly has a first working platform 8 and a second working platform 9 on both sides, which are capable of lateral extension and retraction, with the second working platform 9 located above the first working platform 8. Specifically, the first working platform 8 and the second working platform 9 are connected to the corresponding gantry columns 2, gantry longitudinal beams 3, and / or support side columns 4 via conventional sliding or telescopic mechanisms. Several vertical support beams 10 and diagonal support beams 11 are also provided on the top of the gantry crossbeam 1, the top of the middle crossbeam 5, and the top of the uppermost gantry longitudinal beam 3 for mounting a third working platform 12.

[0031] In the specific implementation process, the first working platform 8 is equipped with a first working ladder group 13 extending to the ground. The first working ladder group 13 is located inside or at the end of the gantry assembly, and its top end is connected to the first working platform 8, enabling passage from the ground to the first working platform 8. A second working ladder group 14 is provided between the first working platform 8 and the second working platform 9. Specifically, the second working platform 9 is provided with a first through hole to allow personnel to pass through. One end of the second working ladder group 14 is connected to the first through hole, and the other end is attached to the first working platform 8, thereby enabling passage from the first working platform 8 to the second working platform 9. The two sides of the third working platform 12 are connected to the left and right second working platforms 9 respectively through the third working ladder group 15. At the same time, one end of the third working platform 12 is provided with a second through hole to allow personnel to pass through. A flip-up cover is provided on the second through hole, and the lower end of the second through hole is connected to one end of the fourth working ladder group 16. The other end of the fourth working ladder group 16 is attached to the maintenance platform 6 of the intermediate crossbeam 5. When the equipment needs maintenance, the flip cover can be opened, and maintenance work can be carried out through the second through hole to the maintenance platform 6. The layout of the above-mentioned working ladder group can save space at both ends of the trolley, which not only prevents interference with the end platforms of adjacent process trolleys, but also leaves space for workers to work, while making it safer and more convenient for construction personnel to pass through.

[0032] refer to Figure 1 , Figure 4The feeding mechanism includes arched rails 17 at both ends of the gantry assembly, first telescopic arms 18 slidably connected to the two arched rails 17, and steel bar clamping units 19 connected to the two first telescopic arms 18. The steel bar clamping units 19 are provided with a number of steel bar clamping stations 1901 at intervals along the longitudinal direction of the gantry assembly.

[0033] The arched track 17 is installed on the gantry crossbeam 1, vertical support beam 10, and / or diagonal support beam 11 at both ends of the gantry assembly. The fixed end of the first telescopic arm 18 is provided with a slide 20, which is slidably connected to the outer side of the corresponding arched track 17. Both ends of the gantry crossbeam 1 of the gantry assembly are provided with outwardly extending end platforms 21, and two extension rods 22 extending towards the end platforms 21 are provided at two positions on the inner side of the arched track 17 that are flush with the height of the end platforms 21. The power assembly is mounted on the end platform 21. (Refer to...) Figure 5 The powertrain includes a bracket 23 mounted on the end platform 21, a power mechanism 24 mounted on the bracket 23, and a drive sprocket 25 mounted on the output end of the power mechanism 24. The power mechanism 24 can be an electric motor, a hydraulic motor, etc. Meanwhile, driven sprockets 26 are rotatably connected to the outer wall of the gantry beam 1 at both ends of the gantry assembly. There are multiple driven sprockets 26, which are located on both sides of the drive sprocket 25. The slide table 20 has drive chains 27 connected to both ends, forming a closed loop with the slide table 20. The drive chains 27 are wound around the arched track 17 and the extension rod 22. The driving sprocket 25 meshes with one side of the drive chain 27, and the driven sprocket 26 meshes with the other side. The power mechanism 24 and the driving sprocket 25 provide power to drive the drive chain 27 in reciprocating motion, while the driven sprocket 26 presses and guides the drive chain 27, allowing it to be distributed along the length of the extension rod 22 and the arc of the arched track 17. Figure 4 The direction of the arrows and Figure 6 As shown. Under the action of the power mechanism 24, the transmission chain 27 sets can be driven to reciprocate, thereby driving the slide table 20 and the first telescopic arm 18 to slide along the arched track 17, thereby driving the rebar clamping unit 19 to move upward in an arc. Preferably, the output ends of the two power mechanisms 24 are connected by a synchronous shaft 28, thereby ensuring the consistency of the movement at both ends of the rebar clamping unit 19, that is... Figure 6 As shown.

[0034] It is worth noting that in specific applications, it is not limited to setting power assemblies at both ends of the gantry assembly to drive the transmission chains 27 to reciprocate. Alternatively, a motor assembly can be set on the middle crossbeam 5 of the gantry assembly. The two ends of the motor assembly are connected to two transmission rods, and the two transmission rods are connected to two drive sprockets 25 set on the end platforms 21 at both ends of the trolley. That is, one motor assembly can be used to drive two sets of transmission chains 27 to reciprocate at the same time.

[0035] refer to Figure 7 The rebar clamping unit 19 includes a loading longitudinal beam 1902. The first side of the loading longitudinal beam 1902 is connected to the telescopic ends of two first telescopic arms 18. This means that the rebar clamping unit 19 can also extend and retract radially along the tunnel while moving along the tunnel's arc, thus meeting the assembly position requirements of the outer and inner circumferential rebars. The second side of the loading longitudinal beam 1902 is longitudinally spaced with several connecting clips, serving as rebar clamping stations 1901 for connecting the ends of the circumferential rebars. This allows the circumferential rebars to be laid during the rebar clamping unit 19's movement along the tunnel's arc.

[0036] In a preferred embodiment, a positioning plate 1903 is provided longitudinally on the second side of the feeding beam 1902. The positioning plate 1903 has positioning slots that correspond one-to-one with the rebar clamping station 1901. The positioning slots are used to position the circumferential rebar before it is connected to the inverted arch rebar, so that the circumferential rebar and the inverted arch rebar are aligned. The positioning plate 1903 can also serve as a support platform for workers when the circumferential rebar and the inverted arch rebar are connected, which not only facilitates operation but also effectively ensures construction safety.

[0037] In a preferred embodiment, the feeding longitudinal beam 1902 is provided with a plurality of grooved frames 1904 at intervals along the longitudinal direction for placing longitudinal reinforcing bars. This allows the longitudinal reinforcing bars to be transported to the first working platform 8, the second working platform 9, and the third working platform 12 while the reinforcing bar clamping unit 19 is laying circumferential reinforcing bars, so as to facilitate subsequent longitudinal reinforcing bar binding operations.

[0038] refer to Figure 1 , Figure 8 There are multiple support mechanisms 29, and each support mechanism 29 is circumferentially spaced on the gantry assembly. Each support mechanism 29 includes a strut 2901 and at least two second telescopic arms 2902. The fixed ends of each second telescopic arm 2902 are longitudinally spaced on the gantry assembly. The strut 2901 is connected to the telescopic ends of each second telescopic arm 2902. The strut 2901 is longitudinally spaced with a number of steel bar positioning positions 2903. During the process of multiple circumferential steel bars being pulled from one side of the trolley to the other side, the multiple circumferential steel bars are respectively inserted into the corresponding steel bar positioning positions 2903 to ensure the longitudinal spacing of the multiple circumferential steel bars.

[0039] Specifically, in this embodiment, the rebar positioning station 2903 is an annular groove provided on the support rod 2901. Specifically, multiple separators can be set at equal intervals on the support rod 2901 to form multiple annular grooves adapted to the diameter of a single circumferential rebar. For example, conical sleeves can be set at equal intervals on the support rod 2901, and an annular groove with a V-shaped cross section for a single rebar to pass through can be formed between every two conical sleeves. Alternatively, multiple U-shaped pulleys can be set at equal intervals on the support rod 2901, and a single circumferential rebar can pass through the middle of the pulley during the laying process, which can also achieve the effect of longitudinal spacing positioning.

[0040] refer to Figures 9 to 11 In this embodiment, the auxiliary mechanism includes a slide rail 30, a slide block 31, a cantilever 32, and a crane 33. The slide rail 30 is longitudinally located on the loading side of the gantry assembly, specifically welded or bolted to the longitudinal beam 3 of the gantry assembly near the loading side. The slide block 31 is slidably connected to the slide rail 30 and can be driven longitudinally on the slide rail 30 by a winch or a hydraulic motor + screw pair. The first end of the cantilever 32 is rotatably connected to the slide block 31, and the second end of the cantilever 32 faces the loading side, meaning the cantilever 32 rotates within 180° in the horizontal direction on the loading side. The crane 33 is fixedly located at the second end of the cantilever 32. Preferably, the cantilever 32 is a hydraulically driven telescopic arm. By setting up the crane 33, materials such as longitudinal steel bars and waterproof membranes on the ground can be lifted onto the trolley, thereby reducing labor costs and improving construction efficiency. Furthermore, after multiple circumferential reinforcing bars are pulled from the feeding side to the docking side by the feeding mechanism, and then removed from the reinforcing bar clamping station 1901 of the feeding mechanism and connected to the invert reinforcing bars on the docking side, it is still necessary to continue pulling the circumferential reinforcing bars towards the docking side for another 0.5-1.5 meters. At this time, the crane 33 can hook the other end of the circumferential reinforcing bar from the feeding side and pull it upwards, thus achieving auxiliary pulling during the movement of a single circumferential reinforcing bar. The slide 31 and cantilever 32 can drive the crane 33 to move longitudinally, thereby accommodating the auxiliary pulling of multiple circumferential reinforcing bars before finally connecting them to the invert reinforcing bars.

[0041] Example 2 Based on the tunnel reinforcement trolley in Example 1, this example also discloses a construction method for the tunnel reinforcement trolley, which mainly includes the following steps: Step 1: Place multiple outer circumferential reinforcing bars, inner circumferential reinforcing bars, outer longitudinal reinforcing bars, and inner longitudinal reinforcing bars on one side of the tunnel pavement and near the temporary drainage ditch in the tunnel, and define this side as the loading side; Step 2: Adjust the position of the trolley so that the center of the trolley coincides with the center of the tunnel. After adjusting the feeding mechanism to the feeding side, align each steel bar clamping station 1901 on the steel bar clamping unit 19 with each outer layer inverted arch steel bar on the feeding side. Step 3: Using a crane, multiple outer longitudinal reinforcing bars are placed along the longitudinal direction of the tunnel into the trench frame 1904 on the reinforcing bar clamping unit 19, and the first ends of the multiple outer circumferential reinforcing bars are respectively connected to the reinforcing bar clamping station 1901. Figure 12 As shown; Step 4: Drive the rebar clamping unit 19 to slide along the arched track 17, pulling multiple outer circumferential rebars to be supported in an arc shape on the trolley, i.e. Figure 13 As shown, the following operations are performed simultaneously as the rebar clamping unit 19 slides along the arched track 17: After the rebar clamping unit 19 passes a support mechanism 29, the corresponding support mechanism 29 extends to support the multiple outer circumferential rebars passing through that position, so that the arc-shaped profile of the outer circumferential rebars corresponds to the required binding profile. Figure 14 As shown, the longitudinal equidistant arrangement of the outer circumferential reinforcing bars is achieved by utilizing the reinforcing bar positioning station 2903 on the support mechanism 29; When the steel bar clamping unit 19 passes through the working platforms of each area on the gantry assembly (i.e., the first working platform 8, the second working platform 9, and the third working platform 12 in Embodiment 1), the required outer longitudinal steel bars in the corresponding area are removed and placed on the working platform. Step 5: Drive the rebar clamping unit 19 to slide along the arched track 17 to the docking side. After removing the first end of the outer circumferential rebar from the rebar clamping station 1901, allow the first ends of multiple outer circumferential rebars to pass through the corresponding positioning slots on the rebar clamping unit 19, and then dock them one by one with the outer inverted arch rebar on the docking side. During docking, use a crane on the feeding side to pull the corresponding outer circumferential rebar upwards to help the first end of the outer circumferential rebar get closer to the inverted arch rebar, thus assisting in completing the docking. Afterwards, or simultaneously, dock the second end of the outer circumferential rebar with the outer inverted arch rebar on the feeding side, and install the outer longitudinal rebar to complete the binding of the outer rebar. Figure 15 As shown; Step 6: After completing the binding of the outer layer of reinforcing bars, retract each support mechanism 29 and drive the reinforcing bar clamping unit 19 back to the feeding side, and then complete the binding of the inner layer of reinforcing bars using the same operating steps.

[0042] Two different implementation methods can be used when performing rebar splicing and binding in step 5.

[0043] In the first implementation, when connecting multiple outer circumferential reinforcing bars to the arch reinforcing bars on the connecting side, the connection between the first outer circumferential reinforcing bar and the arch reinforcing bar on the connecting side is first fixed. Then, the other ends of the multiple outer circumferential reinforcing bars can be connected one by one to the corresponding outer arch reinforcing bars on the feeding side, i.e., the feeding side and the connecting side are connected simultaneously. After the connection between the arch reinforcing bars on the connecting side and the feeding side is completed, the outer longitudinal reinforcing bars can be tied simultaneously on multiple regional platforms to complete the fixing of the outer reinforcing bars.

[0044] In the second implementation, after the multiple outer circumferential reinforcing bars are connected to the inverted arch reinforcing bars on the butt joint side, the outer longitudinal reinforcing bars can be tied one by one from the butt joint side toward the feeding side to fix the outer reinforcing bars. When tying to the position of the inverted arch reinforcing bars on the feeding side, one end of each of the multiple outer circumferential reinforcing bars is then connected to the corresponding multiple outer inverted arch reinforcing bars from the feeding side.

[0045] Step 6, the binding process of the inner layer of reinforcing bars specifically includes: First, multiple inner longitudinal reinforcing bars are placed in the trench frame 1904 on the reinforcing bar clamping unit 19 along the longitudinal direction of the tunnel, and the first ends of multiple inner circumferential reinforcing bars are respectively connected to the reinforcing bar clamping station 1901, i.e. Figure 16 As shown; Then, the drive bar clamping unit 19 slides along the arched track 17, pulling multiple inner circumferential bars to be supported in an arc shape on the trolley, i.e. Figure 17 As shown, the following operations are performed simultaneously as the rebar clamping unit 19 slides along the arched track 17: After the rebar clamping unit 19 passes through the position of the support mechanism 29, the corresponding support mechanism 29 extends to support the multiple inner circumferential rebars passing through that position, so that the arc-shaped contour of the inner circumferential rebars corresponds to the required binding contour, and the longitudinal equidistant arrangement of the inner circumferential rebars is achieved by using the rebar positioning station 2903 on the support mechanism 29. When the rebar clamping unit 19 passes through the working platforms of each area on the gantry assembly (i.e., the first working platform 8, the second working platform 9, and the third working platform 12 in Embodiment 1), the inner longitudinal rebar required in the corresponding area is removed and placed on the working platform. Finally, the drive bar clamping unit 19 slides along the arched track 17 to the docking side. After removing the first end of the inner circumferential bar from the bar clamping station 1901, the first ends of multiple inner circumferential bars pass through the corresponding positioning slots on the bar clamping unit 19, and then are docked one by one with the inner inverted arch bars on the docking side. During docking, a crane is used on the feeding side to pull the corresponding inner circumferential bars upwards, assisting the first end of the inner circumferential bars to get closer to the inverted arch bars, thus assisting in completing the docking. Subsequently, or simultaneously, the second end of the inner circumferential bars is docked with the inner inverted arch bars on the feeding side, and the inner longitudinal bars are installed, completing the binding of the inner bars. Figure 18 This completes the binding of the secondary lining reinforcement. Figure 19 As shown.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. All equivalent structural transformations made under the inventive concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A single-layer rebar trolley for tunnels, characterized in that, Includes a gantry assembly and a loading mechanism, a support mechanism, and an auxiliary mechanism mounted on the gantry assembly; The feeding mechanism includes arched tracks at both ends of the gantry assembly, first telescopic arms slidably connected to the two arched tracks, and a steel bar clamping unit connected to the two first telescopic arms. The steel bar clamping unit is provided with a plurality of steel bar clamping stations spaced apart along the longitudinal direction of the gantry assembly. The number of the support mechanisms is multiple, and each of the support mechanisms is spaced apart circumferentially on the gantry assembly; The support mechanism includes a strut and at least two second telescopic arms. The fixed ends of each second telescopic arm are longitudinally spaced and connected to the gantry assembly. The strut is connected to the telescopic ends of each second telescopic arm. The strut is provided with a number of steel bar positioning positions longitudinally spaced. The auxiliary mechanism includes a slide rail, a slide block, a cantilever, and a crane. The slide rail is longitudinally arranged on the loading side of the gantry assembly. The slide block is slidably connected to the slide rail. One end of the cantilever is rotatably connected to the slide block, and the crane is located at the other end of the cantilever.

2. The tunnel reinforcement trolley with single-layer mesh reinforcement according to claim 1, characterized in that, The steel bar clamping unit includes a feeding longitudinal beam, and the first side of the feeding longitudinal beam is connected to the first telescopic arm. The second side of the feeding longitudinal beam is provided with several connecting buckles spaced longitudinally to serve as the steel bar clamping station.

3. The tunnel reinforcement trolley with single-layer mesh reinforcement according to claim 2, characterized in that, The second side of the feeding longitudinal beam is provided with a positioning plate along the longitudinal direction, and the positioning plate is provided with positioning slots that correspond one-to-one with the steel bar clamping station.

4. The tunnel reinforcement trolley with single-layer mesh reinforcement according to claim 2 or 3, characterized in that, The feeding longitudinal beam is provided with multiple groove frames at intervals along the longitudinal direction for placing longitudinal reinforcing bars.

5. The tunnel reinforcement trolley with single-layer mesh reinforcement according to claim 1, 2, or 3, characterized in that, The rebar positioning station is an annular groove provided on the support rod.

6. The tunnel reinforcement trolley with single-layer mesh reinforcement according to claim 1, 2, or 3, characterized in that, It also includes a transmission chain, and the crossbeams at both ends of the gantry assembly are provided with end platforms, and the inner side of the arched track is provided with two extension rods extending towards the end platforms at positions that are level with the height of the end platforms; Both end platforms are equipped with a power assembly, which includes a power mechanism on the end platform and a drive sprocket at the output end of the power mechanism. Driven sprockets are rotatably connected to the outer walls of the crossbeams at both ends of the gantry assembly. The transmission chain is wound around the arched track and the extension rod. The two ends of the transmission chain are respectively connected to the two ends of the first telescopic arm, and the transmission chain meshes with the driving sprocket and the driven sprocket.

7. The tunnel reinforcement trolley with single-layer mesh reinforcement according to claim 6, characterized in that, The fixed end of the first telescopic arm is provided with a slide table, which is slidably connected to the outside of the arched track, and the two ends of the transmission chain are respectively connected to the two ends of the slide table.

8. The tunnel reinforcement trolley with single-layer mesh reinforcement according to claim 6, characterized in that, The output ends of the two power mechanisms are connected by a synchronous shaft.

9. The tunnel reinforcement trolley with single-layer mesh reinforcement according to claim 1, 2, or 3, characterized in that, The gantry assembly is provided with a first working platform and a second working platform on both sides, which are capable of horizontal extension and retraction. The second working platform is located above the first working platform. The first working platform is provided with a first working ladder group extending to the ground. The second working ladder group is provided between the first working platform and the second working platform. The top of the gantry assembly is provided with a third working platform. The two sides of the third working platform are respectively connected to the two second working platforms through a third working ladder group. A fourth working ladder group is provided between the third working platform and the crossbeam of the gantry assembly.

10. A construction method for a tunnel reinforcement trolley as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Multiple outer circumferential reinforcing bars, inner circumferential reinforcing bars, outer longitudinal reinforcing bars, and inner longitudinal reinforcing bars are placed on the tunnel road surface on the material loading side; Adjust the position of the trolley so that the center of the trolley coincides with the center of the tunnel. After adjusting the feeding mechanism to the feeding side, align each steel bar clamping station on the steel bar clamping unit with each outer layer inverted arch steel bar on the feeding side. Multiple outer longitudinal steel bars are stored in the trench frame on the steel bar clamping unit along the longitudinal direction of the tunnel, and the first ends of multiple outer circumferential steel bars are respectively connected to the steel bar clamping station. The rebar clamping unit slides along the arched track, pulling multiple outer circumferential rebars to be supported in an arc shape on the trolley. Simultaneously, the following operations are performed as the rebar clamping unit slides along the arched track: After each support mechanism is passed by the rebar clamping unit, the corresponding support mechanism extends to support the multiple outer circumferential rebars passing through that position, so that the arc-shaped outline of the outer circumferential rebars corresponds to the required binding outline, and the longitudinal equidistant arrangement of the outer circumferential rebars is achieved by using the rebar positioning station on the support mechanism. As the rebar clamping unit passes through the working platform of each area on the gantry assembly, the required outer longitudinal rebar in the corresponding area is removed and placed on the working platform. The drive bar clamping unit slides along the arched track to the docking side. After the first end of the outer circumferential bar is removed from the bar clamping station, the first ends of multiple outer circumferential bars pass through the corresponding positioning slots on the bar clamping unit and are then docked one by one with the outer inverted arch bars on the docking side. During docking, the crane is used to pull the corresponding outer circumferential bars upward from the loading side. Afterwards, or simultaneously, the second end of the outer circumferential reinforcement is connected to the outer arch reinforcement on the feeding side, and the outer longitudinal reinforcement is installed to complete the binding of the outer reinforcement. After completing the binding of the outer layer of reinforcing bars, retract each support mechanism and drive the reinforcing bar clamping unit back to the feeding side, then complete the binding of the inner layer of reinforcing bars using the same operating steps.

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