Tunnel reinforcing mesh laying trolley for lifting, transporting, positioning and supporting double-layer reinforcing steel bars

Abstract

According to the double-layer reinforcing steel bar lifting transportation and positioning supporting tunnel reinforcing steel bar net laying trolley, a double-layer annular reinforcing steel bar positioning supporting system is installed on the upper portion of a portal of the trolley, horizontal positioning supporting systems of double-layer reinforcing steel bars are installed on the two sides of the portal, and lifting working platform systems for lifting and binding longitudinal reinforcing steel bars on the two sides are installed on the two sides of the portal. A lifting system capable of lifting a steel bar conveying trolley system is installed at one end of the portal frame, a conveying trolley can convey two layers of steel bars at the same time, can drive the two layers of steel bars to walk on the upper portion of the portal frame of the trolley, and can also conduct connection of the two layers of annular steel bars with the upper vertical positioning and supporting system. The trolley can complete most of work of binding reinforcing steel bars in a tunnel, greatly improves the efficiency of binding a reinforcing mesh, reduces the labor intensity, shortens the construction period, reduces the construction cost, and is better in construction safety.

Description

Technical Field

[0001] The patent of this invention relates to secondary lining steel mesh laying equipment in the construction of underground projects such as tunnels and subways, a tunnel steel mesh laying trolley for lifting, transporting and positioning support of double-layer steel bars. Background Art

[0002] At present, in the construction of domestic tunnels, subways and other underground projects, there is no good equipment for laying secondary lining steel mesh. Most construction sites rely on simple platforms, and workers stand on them to carry out steel bar operations. There is no support and positioning mechanism or lifting and transportation mechanism on the simple platforms. The steel bars are sent to the platforms manually, which requires more manual support and binding, with low efficiency and high labor intensity. This situation is not suitable for the requirements of my country's infrastructure maniacs.

[0003] In response to this situation, some people have also studied other types of track laying trolleys, but none of them are ideal and cannot be applied and promoted in engineering projects. This is because this operation is not only a high-altitude operation, but also requires laying a large number of long steel bars, and tying so many steel bars into a mesh, which is indeed very difficult. Summary of the invention

[0004] In order to improve the laying efficiency of the secondary lining steel mesh of tunnels and subways, reduce the number of operators and reduce labor intensity, the present invention patent designs a tunnel steel mesh laying trolley with double-layer steel bar lifting, transportation and positioning support. It consists of a trolley gantry, a lifting work platform system on both sides, an upper steel bar transportation trolley system, a steel bar horizontal positioning support system on both sides, an upper annular steel bar vertical positioning support system, a steel bar lifting system and a power control system. Travel wheels are installed on both sides of the trolley gantry, and there are two lifting work platform systems on both sides, which are installed on both sides of the trolley gantry. Each lifting work platform The platform system has multiple sets of guide rod upper supports and lower supports, which are respectively installed on the upper and lower parts of both sides of the trolley gantry. The running wheels of the upper steel bar transport trolley system can run in the track B of the steel bar lifting system or in the track A on the upper part of the trolley gantry. There are two steel bar horizontal positioning support systems on both sides, which are respectively installed on both sides of the trolley gantry. There are two upper circumferential steel bar vertical positioning support systems, which are distributed on both sides of the upper part of the trolley gantry. The sliding sleeve of the upper circumferential steel bar vertical positioning support system is fixed on the upper part of the trolley gantry, and the steel bar lifting system is installed at one end of the trolley gantry through the slide rail fixing block.

[0005] The tunnel steel mesh laying trolley for lifting, transporting and positioning support of double-layer steel bars has two lifting work platform systems on both sides. Each lifting work platform system is composed of multiple groups of lifting guide rods, guide rod upper supports and lower supports, lifting platforms and telescopic rods. A lifting guide rod is installed between each group of upper supports and lower supports. The lifting platform is mounted on multiple groups of lifting guide rods. Under the action of the power mechanism, the lifting platform rises and falls along the guide rods, and multiple telescopic rods are installed on the lifting platform.

[0006] The upper steel bar transport trolley system of the double-layer steel bar lifting, transporting and positioning supported tunnel steel bar mesh laying trolley is composed of the transport trolley steel bar vertical support rod and steel bar positioning card C, longitudinal steel bar casing, vertical support rod bottom plate and support rod bottom plate transverse connecting rod, transport trolley lifting legs and transport trolley chassis. The wheels installed on both sides of the transport trolley chassis can walk on two tracks B installed in the middle of the steel bar lifting system. Two sets of lifting legs are installed on both sides of the upper part of the trolley chassis. A support rod bottom plate is installed on the upper part of each set of lifting legs to connect the two lifting legs on one side into one. A plurality of vertical steel bar support rods are installed above each support rod bottom plate, the horizontal distance between two vertical steel bar support rods is equal to the horizontal distance between two annular steel bars in the steel mesh designed for the tunnel, two steel bar positioning cards C are installed on the left side of each vertical steel bar support rod, each steel bar positioning card C has a socket for placing steel bars, the height difference between the two steel bar positioning cards C is equal to the radial distance between two layers of annular steel bars in the steel mesh designed for the tunnel, a transverse connecting rod is installed between the two support rod bottom plates, and the longitudinal steel bar casing is installed on a transverse connecting rod close to the gantry trolley.

[0007] The described double-layer steel bar lifting, transportation and positioning support tunnel steel bar mesh laying trolley has two steel bar horizontal positioning support systems on both sides, which are respectively installed on both sides of the trolley gantry, and each horizontal positioning support system is divided into multiple independent horizontal positioning support mechanisms, and each independent positioning support mechanism is composed of a horizontal support rod and a positioning card A, support rod bottom plates on both sides, positioning support rod slide rails and sliding sleeves, telescopic rods on both sides, fixed working platforms on both sides and a power cylinder A for sliding of the independent positioning support mechanism. The fixed working platforms on both sides are installed on the trolley gantry, and two positioning support telescopic rods are installed on each fixed working platform. A positioning support sliding sleeve is installed at the front end of the two telescopic rods, and the positioning support slide rail is installed in the sliding sleeve. The power cylinder A is installed at one end of the positioning support sliding sleeve. The front end of the piston rod of A is connected to the slide rail, and multiple horizontal support rods are installed on the slide rail. The number of horizontal support rods is equal to the number of vertical support rods installed on the bottom plate of one side of the transport trolley system, and the distance between the two horizontal support rods is equal to the distance between the two vertical support rods on the bottom plate of one side of the transport trolley system. Two horizontal steel bar positioning cards A are installed on the right side of each horizontal support rod, and each positioning card A has a socket for positioning steel bars. The distance between the two horizontal steel bar positioning cards A on each horizontal support rod is equal to the radial distance between the two layers of steel bars of the second lining steel mesh designed for the tunnel, and the horizontal distance between two adjacent positioning cards A of the two independent positioning support mechanisms is equal to the horizontal distance between the two circumferential steel bars of the second lining steel mesh designed for the tunnel.

[0008] The tunnel steel mesh laying trolley for double-layer steel bar lifting, transportation and positioning support has two upper annular steel bar vertical positioning support systems, which are respectively installed on both sides of the upper part of the trolley gantry. Each upper annular steel bar vertical positioning support system is composed of multiple independent vertical positioning support mechanisms. Each independent vertical positioning support mechanism is composed of a vertical support rod and a positioning card B, an upper annular steel bar support rod bottom plate, and an upper lifting leg. The slide rail, sliding sleeve and power cylinder B of each upper annular steel bar vertical positioning support system are shared. Each sliding sleeve is installed on one side of the upper part of the trolley gantry, the rear end of the power cylinder B is installed on the support B, and the support B is installed at one end of the trolley gantry. The lower end of the lifting leg of each independent vertical positioning support mechanism is installed on the slide rail, the support rod bottom plate is installed on the upper end of the two lifting legs, and multiple vertical support rods are installed on each support plate bottom plate. The number of support rods The number of vertical support rods installed on the support rod bottom plate on one side of the transport trolley system is equal to that of the vertical support rods installed on the bottom plate, the distance between the two vertical support rods is equal to the horizontal distance between the two annular steel bars of the second lining steel mesh designed for the tunnel, two steel bar positioning cards B are installed on the right side of each vertical support rod, each positioning card B has a socket for placing steel bars, the height difference between the two steel bar positioning cards B on the same vertical support rod is equal to the radial distance between the two layers of annular steel bars of the second lining steel mesh designed for the tunnel, the horizontal distance between the two adjacent positioning cards B in each layer of positioning cards B is equal to the horizontal distance between the two annular steel bars of the second lining steel mesh designed for the tunnel, the vertical support rod and positioning card B of each independent vertical positioning support mechanism are respectively on the same cross section of the tunnel with the horizontal support rod and positioning card A of the horizontal positioning support mechanism corresponding to their positions, to coordinately support the annular steel bars.

[0009] The steel bar lifting system of the tunnel steel bar mesh laying trolley with double-layer steel bar lifting, transportation and positioning support is composed of two lifting slide rails, two lifting trolley bottom plates, four sliding wheels, two lifting longitudinal beams and two transverse connecting rods, a transport trolley track B and a transport track A on the upper part of the gantry. The two lifting slide rails are installed on the columns on both sides of the trolley gantry through fixed blocks. Two sliding wheels and a longitudinal beam are installed on each lifting trolley bottom plate. The longitudinal beam is perpendicular to the trolley bottom plate and is in a horizontal state. The sliding wheel runs in the slide groove of the lifting slide rail. The two transverse connecting rods connect the two longitudinal beams and the two trolley bottom plates into one, and the lifting mechanism on both sides of the gantry forms a whole. The two tracks B of the transport trolley system are installed on the two transverse connecting rods. The two tracks B of the transport trolley system are connected with the two transport tracks A on the upper part of the trolley gantry with a small gap, and they are in a straight line corresponding to each other.

[0010] The beneficial effects of the present invention are:

[0011] 1. The patent of this invention designs the vertical positioning support system of the upper double-layer annular steel bars and the horizontal positioning support system of the double-layer steel bars on both sides, which realizes the simultaneous positioning and support of two layers of steel bars, saves a lot of manpower, and greatly improves the construction efficiency.

[0012] 2. The patented invention has designed a steel bar lifting system, a double-layer steel bar transport trolley system and lifting working flat belts on both sides, which realizes the simultaneous lifting and transportation of two layers of circumferential steel bars and steel bars on both sides, greatly reducing the labor intensity of workers, increasing the speed of tying steel mesh, reducing construction costs, and shortening construction period. BRIEF DESCRIPTION OF THE DRAWINGS The specific embodiments of the present invention are described below in conjunction with the accompanying drawings:

[0014] Figure 1 Schematic diagram of the cross-sectional structure of the tunnel steel mesh laying trolley with double-layer steel bar lifting, transportation and positioning support

[0015] Figure 2 Schematic diagram of the longitudinal section structure of the tunnel steel mesh laying trolley for lifting, transporting and positioning support of double-layered circumferential steel bars when they are hung on the transport trolley

[0016] Figure 3 Schematic diagram of the longitudinal section structure of the transport trolley equipped with double-layer annular steel bars when it is lifted to a high place

[0017] Figure 4 Schematic diagram of the longitudinal section structure when the transport trolley with double-layer annular steel bars moves to the leftmost independent positioning support mechanism on the upper part of the trolley gantry

[0018] Figure 5 Schematic diagram of the longitudinal section structure when the leftmost independent positioning support mechanism on the upper part of the trolley gantry supports the double-layer annular steel bars and the transport trolley continues to hang the double-layer annular steel bars

[0019] Figure 6 Schematic diagram of the longitudinal section structure when all independent positioning support mechanisms on the upper part of the trolley gantry support double-layer steel bars

[0020] Figure 7 Schematic diagram of the longitudinal section structure when the transport trolley lifts the upper longitudinal steel bars to a high place and ties the upper longitudinal steel bars

[0021] Figure 8 Schematic diagram of the cross-sectional structure when the upper positioning support system of the trolley gantry supports double-layer steel bars and the positioning support systems on both sides support double-layer steel bars

[0022] Fig. 9 Schematic diagram of the cross-sectional structure of the tunnel steel mesh laying trolley for lifting, transporting and positioning support of double-layer steel bars when tying the upper longitudinal steel bars and the longitudinal steel bars on both sides

[0023] Fig.10 Schematic diagram of the cross-sectional structure of the tunnel steel mesh laying trolley for lifting, transporting and positioning the double-layer steel bars when all the steel bars are tied and all the supporting mechanisms are separated from the steel bars

[0024] Among them, 1-trolley door frame, 2-lifting working platform system on both sides, 3-lower supports of guide rods on both sides, 4-lifting working platforms on both sides, 5-telescopic rods of working platforms on both sides, 6-lifting guide rods of working platforms on both sides, 7-upper steel bar transport trolley system, 8-horizontal positioning support system of steel bars on both sides, 9-horizontal support rods of steel bars on both sides, 10-bottom plates of horizontal support rods of steel bars on both sides, 11-slide rails of horizontal support mechanisms on both sides, 12-slide sleeves of horizontal support mechanisms on both sides, 13-telescopic rods of horizontal supports on both sides, 14-both sides Fixed working platform, 15-upper annular steel bar support lifting legs, 16-upper annular steel bar support rod bottom plate, 17-upper annular steel bar vertical support rod, 18-upper annular steel bar vertical positioning support system, 19-upper steel bar transport trolley track A, 20-upper annular steel bar support system slide rail, 21-upper annular steel bar support system sliding sleeve, 22-side steel bar positioning card A, 23-lifting slide rail, 24-transport trolley vertical support rod, 25-transport trolley longitudinal steel bar casing, 26-transport 27-Transport trolley support rod bottom plate transverse connecting rod, 28-transport trolley lifting legs, 29-transport trolley chassis, 30-transport trolley track B, 31-lifting system transverse connecting rod, 32-lifting system longitudinal beam, 33-lifting trolley bottom plate, 34-upper annular steel bar positioning card B, 35-sliding power cylinder A of the independent support mechanism on both sides, 36-support A, 37-inner annular steel bar, 38-transport trolley steel bar positioning card C, 39-outer annular steel bar, 40 -Lifting sliding wheel, 41-slide rail fixing block, 42-gantry end steel bar lifting system, 43-independent horizontal positioning support mechanism on both sides, 44-sliding power cylinder B of the upper annular steel bar vertical support system, 45-support B, 46-steel hoop, 47-outer vertical steel bar, 48-inner vertical steel bar, 49-upper longitudinal steel bar, 50-longitudinal steel bars on both sides, 51-two-layer steel bar connecting bar, 52-supports on both sides of the guide rod, 53-upper vertical independent positioning support mechanism, 54-transport trolley wheels DETAILED DESCRIPTION

[0025] 1. Construction preparation

[0026] ① Put the trolley portal frame (1) in place, so that the center line of the portal frame (1) coincides with the center line of the tunnel, and the sockets for placing the steel bars in the positioning card A (22) of the horizontal positioning support system (8) are exactly the steel bars designed for the external placement of the steel mesh.

[0027] ② Raise the lifting legs (28) of the transport trolley system (7) to the highest position, retract the lifting legs (15) of the vertical positioning support system (18) to the lowest position, and retract the telescopic rods (13) of the horizontal positioning support systems (8) on both sides to the shortest position.

[0028] ③ The two ends of the inner circumferential reinforcement (37) are respectively clamped together with the two inner vertical reinforcements (48) by reinforcement hoops (46), and the two ends of the outer circumferential reinforcement (39) are respectively clamped together with the two outer vertical reinforcements (47) by reinforcement hoops (46).

[0029] 4. The outer circumferential steel bar (39) hooped with the steel bar hoop (46) is hung in the steel bar nest of the lower layer positioning card C (38) of the transport trolley system (7), and the steel bar is placed straight and cannot be tilted.

[0030] ⑤ Hang the inner circumferential steel bar (37) hooped with the steel bar hoop (46) in the steel bar socket of the upper positioning card C (38) of the transport trolley system (7), and place the steel bar straight and not tilted. (See Figure 1 and Figure 2 )

[0031] Complete the operation of hanging and transporting the first set of annular steel bars on the trolley.

[0032] 2. Lift the steel bars

[0033] The steel bar lifting system (42) is started, and the lifting mechanism drives the transport trolley system (7) with the steel bars mounted thereon to rise. When the track B (30) rises to the same level as the track A (19), the steel bar lifting system (42) stops moving. (See Figure 3 )

[0034] 3. Transport upper steel bars

[0035] Under the action of the trolley power, the transport trolley system (7) moves to the left with the double-layer annular steel bars. At this time, the outer annular steel bars (39) are higher than the support rods (17) of the vertical positioning support system (18), and the support rods of the horizontal positioning support systems (8) on both sides will not collide with the outer annular steel bars (39) and the outer vertical steel bars (47). The transport trolley system (7) moves to the leftmost independent vertical positioning support mechanism (53) and stops, so that each outer annular steel bar (39) and inner annular steel bar (37) are located in the gap between the two vertical support rods (17), (see Figure 4 )

[0036] Then, the lifting legs (28) of the transport trolley system (7) are lowered slightly, so that the outer annular steel bars (39) are lowered to between the two positioning clips B (34) and stop lowering. The transport trolley system (7) is moved slightly to the left, so that the outer annular steel bars (39) and the inner annular steel bars (37) are just located above the steel bar positioning clips B (34). The lifting legs (28) of the transport trolley system (7) are lowered again, so that the inner annular steel bars (37) and the outer annular steel bars (39) fall into the nests of the two-layer steel bar positioning clips B (34) of the leftmost independent vertical support mechanism (53). The lifting legs (28) of the transport trolley system (7) are further lowered appropriately, so that the positioning clips C (38) of the transport unloading system (7) are separated from the annular steel bars. At this time, the transport trolley system (7) can return to the lifting system (42), and the lifting legs (28) are raised to the maximum position to transport the next group of annular steel bars. 4. Positioning support

[0037] The lifting leg (15) of the leftmost independent vertical positioning support mechanism (53) is raised to make the annular reinforcements (37) and (39) reach the height designed for the tunnel, and the raising operation is stopped to complete the positioning support of the upper annular reinforcements.

[0038] Start the power cylinder A (35) of the leftmost independent horizontal positioning support mechanism (43), drive the horizontal support rod (9) of this horizontal positioning support mechanism (43) to move horizontally to the left appropriately, so that the horizontal support rod (9) and the horizontal steel bar positioning card A (22) are both located in the gap between the two outer annular steel bars (39), and the horizontal telescopic rod (13) is extended. When the outer annular steel bar (39) is located between the two steel bar positioning cards A (22), the extension is stopped. The power cylinder A (35) is made to move in the opposite direction. When the inner annular steel bar (37) and the outer annular steel bar (39) are just facing the sockets of the positioning card A (22), the power cylinder A (35) stops moving. The horizontal telescopic rod (13) is extended. When the sockets of all the positioning cards A (22) contact and push the inner annular steel bar (37) and the outer annular steel bar (39) to move to the designed position of the tunnel, the telescopic rod (13) stops extending. (See Figure 5 )

[0039] In this way, the positioning support of the first two layers of annular reinforcement (37) and (39) is completed. Repeating the above steps can complete the positioning support of all annular reinforcements. (See Figure 6 )

[0040] 5. Lifting, transportation and tying of upper longitudinal reinforcement

[0041] Insert one end of the first group of upper longitudinal steel bars (49) into the longitudinal steel bar sleeve (25) in the transport trolley system (7), start the steel bar lifting system (42) to raise the transport trolley system (7) to the highest point, at which time the longitudinal steel bar sleeve is located between the inner annular steel bar (37) and the outer annular steel bar (39), and pull the longitudinal steel bars (49) horizontally to the left one by one. When one upper longitudinal steel bar (49) is moved, one longitudinal steel bar is tied, and the transportation and tying are continued. The longitudinal steel bars (49) are tied to the inner annular steel bars (37) and the outer annular steel bars (39) respectively until all are completed. (See Figure 7 )

[0042] 6. Lift and tie the longitudinal reinforcement on both sides

[0043] First, the lifting work platforms (4) on both sides are lowered to the lowest position, and the telescopic rod (5) is extended to exceed the inner vertical steel bars (48).

[0044] Install the longitudinal steel bars (50) on both sides to the telescopic rods (5) of the lifting work platforms (4) on both sides (see Figure 8 ).

[0045] The lifting power on both sides is started, and the lifting working platforms (4) and telescopic rods (5) on both sides are lifted to the highest position with the longitudinal steel bars (50) and then stop. The binding operation begins, and the longitudinal steel bars are respectively bound to the inner vertical steel bars (48) and the outer vertical steel bars (47). The working platforms (4) on both sides are lowered while binding. (See Fig. 9 ) until all the longitudinal reinforcements (50) on both sides are tied.

[0046] Then, retract the telescopic rod.

[0047] 7. Tie the connecting bars

[0048] After all the circumferential reinforcement and longitudinal reinforcement binding operations are completed, the connecting reinforcement (51) is bound to connect the reinforcements on both sides to form an overall mesh structure, which greatly improves stability. The binding operation is finished.

[0049] 8. Recovery of the upper vertical positioning support

[0050] All the lifting legs (15) are lowered appropriately to make all the positioning cards B (34) separate from the annular steel bars (37) and (39), and the power cylinder B (44) moves to make all the support rods (17) and the positioning cards B (34) move appropriately to the left to the gap between the two annular steel bars (39). The lifting legs (15) are lowered to the lowest position to complete the recovery of the vertical positioning support system (18).

[0051] 9. Recovery of horizontal positioning support system

[0052] All telescopic rods (13) are retracted appropriately, so that all positioning cards A (22) are separated from the annular steel bars (37) and (39), and the power cylinder A (35) of each independent horizontal positioning support mechanism (43) is operated, so that all support rods (9) and positioning cards A (22) are moved to the left between the two annular steel bars (39), and then the telescopic rods are retracted to the bottom, thus completing the recovery work of the horizontal positioning support system (8).

[0053] Remove the reinforcing steel bar hoop (46) simultaneously, in order to use in the next circulation.

[0054] 10. Move the tunnel steel mesh laying trolley that lifts and transports double-layer steel bars and positions the support to the next working position, and prepare for the next cycle of operations.

Claims

1. A tunnel steel mesh laying trolley for lifting, transporting and positioning double-layer steel bars, comprising a trolley gantry (1), lifting working platform systems (2) on both sides, an upper steel bar transport trolley system (7), a steel bar horizontal positioning support system (8) on both sides, an upper annular steel bar vertical positioning support system (18), a steel bar lifting system (42) and a power control system. Travel wheels are installed on both sides of the trolley gantry (1). There are two lifting working platform systems (2) on both sides, which are installed on both sides of the trolley gantry (1). Each lifting working platform system (2) has a plurality of guide rod upper supports (52) and lower supports (3), which are installed on the upper and lower sides of the trolley gantry (1). The travel wheels of the lower and upper steel bar transport trolley systems (7) can travel in the track B (30) of the steel bar lifting system (42) or in the track A (19) on the upper part of the trolley gantry (1). There are two steel bar horizontal positioning support systems (8) on both sides, which are respectively installed on both sides of the trolley gantry (1). There are two upper annular steel bar vertical positioning support systems (18), which are distributed on both sides of the upper part of the trolley gantry (1). The sliding sleeve (21) of the upper annular steel bar vertical positioning support system (18) is fixed on the upper part of the trolley gantry (1). The steel bar lifting system (42) is installed on one end of the trolley gantry (1) through a slide rail fixing block (41). The invention is characterized in that: A lifting work platform system (2) on both sides, an upper steel bar transport trolley system (7), a steel bar horizontal positioning support system (8) on both sides, an upper annular steel bar vertical positioning support system (18) and a steel bar lifting system (42) are installed on the trolley door frame (1).

2. The tunnel steel mesh laying trolley for lifting, transporting and positioning support of double-layer steel bars according to claim 1 is characterized by: There are two lifting work platform systems (2) on both sides. Each lifting work platform system (2) is composed of multiple groups of lifting guide rods (6), an upper support (52) and a lower support (3), a lifting platform (4) and a telescopic rod (5). A lifting guide rod (6) is installed between each group of upper supports (52) and lower supports (3). The lifting platform (4) is mounted on the multiple groups of lifting guide rods (6). Under the action of a power mechanism, the lifting platform (4) is lifted and lowered along the guide rods (6). Multiple telescopic rods (5) are installed on the lifting platform (4).

3. The double-layer steel bar lifting, transportation and positioning support tunnel steel mesh laying trolley according to claim 1 is characterized in that: the upper The steel bar transport trolley system (7) is composed of a steel bar vertical support rod (24) and a steel bar positioning card C (38) of the transport trolley, a longitudinal steel bar sleeve (25), a vertical support rod bottom plate (27) and a support rod bottom plate transverse connecting rod (26), a transport trolley lifting legs (28) and a transport trolley chassis (29). The wheels (54) installed on both sides of the transport trolley chassis (29) can travel on two tracks B (30) installed in the middle of the steel bar lifting system (42). Two groups of lifting legs (28) are installed on both sides of the upper part of the trolley chassis (29). A support rod bottom plate (27) is installed on the upper part of each group of lifting legs (28). The two lifting legs (28) on one side of the support rod bottom plate are connected as a whole. A plurality of vertical steel bar support rods (24) are installed above the support rod bottom plate (27), the horizontal distance between two vertical steel bar support rods (24) is equal to the horizontal distance between two circumferential steel bars in the steel mesh designed for the tunnel, two steel bar positioning clamps C (38) are installed on the left side of each vertical steel bar support rod (24), each steel bar positioning clamp C (38) has a socket for placing steel bars, the height difference between the two steel bar positioning clamps C (38) is equal to the radial distance between two layers of circumferential steel bars in the steel mesh designed for the tunnel, a transverse connecting rod (26) is installed between the two support rod bottom plates (27), and a longitudinal steel bar sleeve (25) is installed on a transverse connecting rod (26) close to the portal trolley (1).

4. The tunnel steel mesh laying trolley for lifting, transporting and positioning support of double-layer steel bars according to claim 1 is characterized by: There are two horizontal steel bar positioning support systems (8) on both sides, which are respectively installed on both sides of the trolley door frame (1). Each horizontal positioning support system (8) is divided into a plurality of independent horizontal positioning support mechanisms (43). Each independent positioning support mechanism (43) is composed of a horizontal support rod (9) and a positioning card A (22), a support rod bottom plate (10) on both sides, a positioning support rod slide rail (11) and a slide sleeve (12), a telescopic rod (13) on both sides, a fixed working platform (14) on both sides and a power cylinder A (35) for sliding the independent positioning support mechanism. The fixed working platform (14) on both sides is installed on the trolley door frame (1). Two positioning support telescopic rods (13) are installed on each independent horizontal positioning support mechanism (43). A positioning support slide sleeve (12) is installed at the front end of the two telescopic rods (13). The positioning support slide rail (11) is installed in the slide sleeve (12). The power cylinder A (35) is installed at one end of the positioning support slide sleeve (12). 5) is connected to the slide rail (11), and a plurality of horizontal support rods (9) are installed on the slide rail (11), the number of the horizontal support rods (9) is equal to the number of the vertical support rods (24) installed on the bottom plate (27) on one side of the transport trolley system (7), the distance between the two horizontal support rods (9) is equal to the distance between the two vertical support rods (24) on the bottom plate (27) on one side of the transport trolley system (7), two horizontal steel bar positioning cards A (22) are installed on the right side of each horizontal support rod (9), each positioning card A (22) has a socket for positioning steel bars, the distance between the two horizontal steel bar positioning cards A (22) on each horizontal support rod (9) is equal to the radial distance between the two layers of steel bars of the second lining steel mesh designed for the tunnel, and the horizontal distance between the two adjacent positioning cards A (22) of the two independent positioning support mechanisms (43) is equal to the horizontal distance between the two circumferential steel bars of the second lining steel mesh designed for the tunnel.

5. The tunnel steel mesh laying trolley for lifting, transporting and positioning support of double-layer steel bars according to claim 1 is characterized by: Upper ring There are two steel bar vertical positioning support systems (18), which are respectively installed on both sides of the upper part of the trolley gantry (1). Each upper annular steel bar vertical positioning support system (18) is composed of a plurality of independent vertical positioning support mechanisms (53). Each independent vertical positioning support mechanism (53) is composed of a vertical support rod (17) and a positioning card B (34), an upper annular steel bar support rod bottom plate (16), and an upper lifting leg (15). The slide rail (20), the sliding sleeve (20) and the upper lifting leg (15) of each upper annular steel bar vertical positioning support system (18) are 1) and the power cylinder B (44) are shared, the sliding sleeve (21) is installed on one side of the upper part of the trolley gantry (1), the rear end of the power cylinder B (44) is installed on the support B (45), the support B (45) is installed on one end of the trolley gantry (1), the lower end of the lifting leg (15) of each independent vertical positioning support mechanism (53) is installed on the slide rail (20), the support rod bottom plate (16) is installed on the upper end of the two lifting legs (15), and a plurality of vertical support rods (17) are installed on each support plate bottom plate (16). The number of the support rods (17) is equal to the number of the vertical support rods (24) installed on the support rod bottom plate (27) on one side of the transport trolley system (7), the distance between the two vertical support rods (17) is equal to the horizontal distance between the two circumferential steel bars of the secondary lining steel mesh designed for the tunnel, two steel bar positioning cards B (34) are installed on the right side of each vertical support rod (17), each positioning card B (34) has a socket for placing steel bars, and the distance between the two steel bar positioning cards B (34) on the same vertical support rod (17) is equal to the horizontal distance between the two circumferential steel bars of the secondary lining steel mesh designed for the tunnel. The height difference is equal to the radial distance between two layers of annular steel bars of the second lining steel mesh designed for the tunnel, the distance between two adjacent positioning cards B (34) in each layer of positioning cards B (34) is equal to the horizontal distance between two annular steel bars of the second lining steel mesh designed for the tunnel, and the vertical support rod (17) and positioning card B (34) of each independent vertical positioning support mechanism (53) are respectively on the same cross section of the tunnel as the horizontal support rod (9) and positioning card A (22) of the horizontal positioning support mechanism (43) corresponding to the position thereof.

6. The tunnel steel mesh laying trolley for lifting, transporting and positioning support of double-layer steel bars according to claim 1 is characterized by: The steel bar lifting system (42) is composed of two lifting slide rails (23), two lifting trolley bottom plates (33), four sliding wheels (40), two lifting longitudinal beams (32) and two transverse connecting rods (31), a transport trolley track B (30) and a gantry upper transport track A (19). The two lifting slide rails (23) are installed on the columns on both sides of the trolley gantry (1) through a fixing block (41). Two sliding wheels (40) and a longitudinal beam (32) are installed on each lifting trolley bottom plate (33). The longitudinal beam (32) and the trolley bottom plate (33) are connected to each other. ) is vertical and horizontal, the sliding wheel (40) moves in the slide groove of the lifting slide rail (23), the two transverse connecting rods (31) connect the two longitudinal beams (32) and the two trolley bottom plates (33) into one, and the lifting mechanism on both sides of the door frame (1) forms a whole. The two rails B (30) of the transport trolley system (7) are installed on the two transverse connecting rods (31), and the two rails B (30) of the transport trolley system (7) are connected with the two transport rails A (19) on the upper part of the trolley door frame (1) with a small gap, and they are respectively in a straight line.

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