Construction device and construction method for small curve ramp bridge anti-collision guardrail

Abstract

The invention discloses a small curve ramp bridge anti-collision guardrail construction device and method, and belongs to the technical field of bridge construction.The small curve ramp bridge anti-collision guardrail construction device comprises a base, a truss, a balancing weight, a walking mechanism and an operation platform, a containing box with an opening in the top face is installed on the truss in a sliding mode, and an abutting plate is installed in the containing box in a sliding mode; the side face, close to the working platform, of the abutting plate can abut against a formwork, a discharging through groove is formed in the bottom face of the containing box, a bearing plate is installed on the containing box in a sliding mode in the vertical direction through the discharging through groove, and the top face of the bearing plate is attached to the bottom face of the formwork. The truss is provided with a driving assembly used for driving the containing box to move to the position above the operation platform, and the containing box is provided with a moving assembly used for driving the bearing plate to move downwards. The formwork mounting device has the effect of being high in formwork mounting efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a construction device and a construction method for an anti-collision guardrail of a small curve ramp bridge. Background Art

[0002] During the bridge construction process, the construction of anti-collision guardrails is an important link, which is not only related to the beauty of the bridge, but also to driving safety. The construction of bridge anti-collision guardrails usually involves high-altitude edge operations, especially when crossing railways, highways, navigable rivers or densely populated areas. The construction safety risk is relatively high, and it is necessary to ensure that no objects fall during the entire construction process.

[0003] The bridge tensioned anti-collision guardrail construction vehicle is a movable trolley used for the installation and removal of external formwork during the construction of bridge anti-collision guardrails and to ensure the safety of construction workers. The bridge tensioned anti-collision guardrail construction vehicle usually includes components such as trusses, bases, counterweights, cranes, walking mechanisms and working platforms. The crane is used to transport the template to be installed to the working platform, and the construction workers stand on the working platform to install it according to the design requirements. However, the template is usually connected to the crane with a wire rope, and the construction workers need to remove the wire rope before installing the template, which reduces the construction efficiency. Summary of the invention

[0004] In order to improve the problem of low template installation efficiency, the present application provides a small curve ramp bridge anti-collision guardrail construction device and construction method.

[0005] The present application provides a small curve ramp bridge anti-collision guardrail construction device and construction method using the following technical solutions: A small curve ramp bridge anti-collision guardrail construction device comprises a base, a truss, a counterweight, a walking mechanism and a working platform, a placement box with an opening on the top surface is slidably installed on the truss, an abutment plate is slidably installed in the placement box, the side of the abutment plate close to the working platform can abut against the template, a material discharge groove is opened on the bottom surface of the placement box, a bearing plate is vertically slidably installed on the placement box through the material discharge groove, the top surface of the bearing plate is in contact with the bottom surface of the template, a driving component for driving the placement box to move above the working platform is arranged on the truss, and a moving component for driving the bearing plate to move downward is arranged on the placement box.

[0006] By adopting the above technical solution, several templates are placed in the placement box in turn, and the placement box is moved to the top of the working platform under the action of the driving component. The carrying plate moves downward under the action of the moving component, thereby driving the template above the carrying plate to move downward. The template is moved to the working platform to facilitate the construction personnel to install the template. The abutment plate pushes the remaining template in the placement box to the side close to the carrying plate, so that the bottom surface of the template is fitted with the top surface of the carrying plate, so that the carrying plate drives the template to move downward. The construction personnel only need to transfer the template on the carrying plate to the construction platform, and the template installation efficiency is relatively high.

[0007] Preferably, a conveying plate is installed on the top of the placement box, and a hand winch is installed on both ends of the conveying plate. Lifting rings are fixed on both ends of the top of the placement box, and the hook of the hand winch is connected to the lifting ring.

[0008] By adopting the above technical solution, the placement box can be driven to move vertically by the hand winch, so as to facilitate the transportation of the template into the placement box, thereby improving the working efficiency.

[0009] Preferably, the driving assembly includes a screw rod rotatably mounted on the truss and a guide rod fixed on the truss, the conveying plate is sleeved on the outer periphery of the screw rod and the guide rod, the conveying plate and the screw rod are threadedly matched, a motor is fixed on the truss, and the output end of the motor is fixedly connected to the end of the screw rod.

[0010] By adopting the above technical solution, motor 1 is started, and motor 1 drives screw 1 to rotate, and screw 1 drives the conveying plate to move toward the direction close to the working platform, so that the carrying plate moves to just above the working platform, so that the carrying plate can drive the template to move downward, making the movement of the placement box more stable and controllable, ensuring the safety and reliability of the template conveying process.

[0011] Preferably, the moving component includes two screws rotatably installed in the placement box, a moving groove is opened on the bottom surface of the placement box, and a moving plate is installed on the placement box through the moving groove for vertical sliding. The moving plate is sleeved on the outer periphery of the two screws, and the moving plate cooperates with the two screws in threaded transmission. The bottom end of the moving plate is fixedly connected to the supporting plate, and a synchronization component for driving the two screws to rotate synchronously is provided on the placement box.

[0012] By adopting the above technical solution, the synchronous component is used to drive the second screw to rotate, the second screw drives the movable plate to move vertically, and the movable plate drives the supporting plate to move vertically, so as to accurately control the descending speed and position of the template, thereby further improving the accuracy of construction.

[0013] Preferably, the synchronization component includes a worm wheel mounted and fixed on the outer periphery of the second screw, a worm is rotatably installed in the placement box, the worm and the worm wheel are engaged with each other, and a second motor is installed on the side of the placement box, and the output end of the second motor is fixedly connected to the end of the worm.

[0014] By adopting the above technical solution, motor two is started, motor two drives the worm to rotate, the worm drives the two worm wheels to rotate synchronously, and then drives the two screws to rotate synchronously, avoiding template deviation or damage caused by asynchronous movement.

[0015] Preferably, a screw three is passed through the side of the placement box away from the working platform, the end of the screw three is rotatably connected to the abutment plate, the screw three is threadedly matched with the placement box, a clearance groove is opened on the outer circumference of the screw three, a gear one is sleeved on the outer circumference of the screw three, a clearance block is fixed on the inner circumference of the gear one, the clearance block is slidingly matched with the screw three through the clearance groove, a rotating rod is rotatably installed on the side of the placement box, a gear two is sleeved and fixed on the outer circumference of the rotating rod, the gear two and the gear one are meshed with each other, a motor three is installed on the placement box, and the output end of the motor three is fixedly connected to the end of the rotating rod.

[0016] By adopting the above technical solution, motor three is started, motor three drives the rotating rod to rotate, the rotating rod drives gear one to rotate through gear two, gear one drives screw three to rotate through the give way block and the give way groove, screw three drives the abutment plate to move, so that the abutment plate is always in abutment with the template, ensuring the correct placement of the template.

[0017] Preferably, a control groove is provided on the side of the abutment plate away from the screw rod three, and a control block is slidably installed on the abutment plate along its own thickness direction through the control groove, a spring 1 is fixed to the side of the control block close to the screw rod three, and one end of the spring 1 away from the control block is fixedly connected to the inner wall of the control groove, a moving piece 1 is fixed to the side of the control block, a sliding groove is provided on the inner wall of the control groove, and the moving piece 1 slides and cooperates with the abutment plate through the sliding groove, and a stator 1 is fixed to the inner wall of the sliding groove away from the screw rod three, the moving piece 1 can be electrically contacted with the stator 1, the stator 1 is electrically connected to the power supply, and the moving piece 1 is electrically connected to the motor 3.

[0018] By adopting the above technical solution, when the template is separated from the abutment plate, the control block moves toward the direction close to the template under the elastic force of spring 1, so that the movable plate 1 is electrically contacted with the fixed plate 1, the motor 3 is energized and works, the abutment plate moves toward the direction close to the template, the control block abuts against the template and enters the control groove, the movable plate 1 and the fixed plate 1 are separated, and the abutment plate stops moving, thereby realizing precise control of the position of the abutment plate and improving the automation level of template installation.

[0019] Preferably, a baffle is fixed to the bottom surface of the placement box, and the baffle is located on a side of the supporting plate away from the abutting plate.

[0020] By adopting the above technical solution, when the load-bearing plate drives the template to move downward, the template is located on the side of the baffle away from the construction workers, reducing the possibility of the template tilting toward the side close to the construction workers, increasing the safety during the construction process, and protecting the construction workers.

[0021] Preferably, two fixed blocks are fixed to the bottom surface of the placement box, a connecting rod is rotatably installed between the two fixed blocks, a connecting plate is sleeved on the outer periphery of the connecting rod, the connecting plate is located on the side of the bearing plate away from the baffle, a limiting block is fixed to the bottom surface of the placement box, the connecting plate can fit with the limiting block on the side close to the baffle, a torsion spring is sleeved on the outer periphery of the connecting rod, one end of the torsion spring is fixedly connected to the fixed block, and the other end of the torsion spring is fixedly connected to the connecting plate.

[0022] By adopting the above technical solution, during the process of the template descending, the connecting plate abuts against the template, thereby reducing the possibility of the load-bearing plate tilting after leaving the placement box.

[0023] A construction method for a small curve ramp bridge anti-collision guardrail comprises the following steps: S1. Accurately process and assemble the steel formwork, strictly control the size error within 2mm, ensure the rigidity and surface finish of the formwork, and prevent deformation; S2. Make fine adjustments after the formwork is tested, remove loose rust and evenly apply release agent, accurately lay out and adjust the steel bars through the total station, ensure the thickness of the protective layer and the straightness of the line, install the formwork and conduct a strict inspection; S3. Prepare concrete according to the laboratory mix ratio, pour it evenly in three layers and strictly control the vibration time to ensure the uniformity and strength of the concrete; S4. Choose the appropriate demolding time according to the ambient temperature and concrete strength. Immediately cover the concrete with geotextile for curing after demolding, conduct a comprehensive quality inspection, and promptly handle any problems found.

[0024] By adopting the above technical solution, the provided construction method combines automated devices with traditional construction technology, achieving high efficiency and high quality in the construction process while ensuring construction safety.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Put several templates into the placement box in turn. The placement box moves to the top of the working platform under the action of the driving component. The carrying plate moves downward under the action of the moving component, thereby driving the template above the carrying plate to move downward. The template moves to the working platform to facilitate the construction personnel to install the template. The abutment plate pushes the remaining templates in the placement box to the side close to the carrying plate, so that the bottom surface of the template fits with the top surface of the carrying plate, so that the carrying plate drives the template to move downward. The construction personnel only need to transfer the template on the carrying plate to the construction platform, and the template installation efficiency is high; 2. The hand chain hoist can drive the placement box to move vertically, so as to transport the template into the placement box, thus improving the working efficiency; 3. Start motor 1, which drives screw 1 to rotate, and screw 1 drives the conveying plate to move toward the direction close to the working platform, so that the carrying plate moves to just above the working platform, so that the carrying plate drives the template to move downward, making the movement of the placement box more stable and controllable, ensuring the safety and reliability of the template conveying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the small curve ramp bridge anti-collision guardrail construction device of the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the installation structure of the conveying plate and the placement box in the small curve ramp bridge anti-collision guardrail construction device of the embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view of a placement box in a small curve ramp bridge anti-collision guardrail construction device according to an embodiment of the present application.

[0029] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0030] Figure 5 It is a bottom schematic diagram of a placement box in a small curve ramp bridge anti-collision guardrail construction device according to an embodiment of the present application.

[0031] Figure 6 yes Figure 5 A magnified schematic diagram of point B in the middle.

[0032] Figure 7 It is a cross-sectional view of the abutment plate in the small curve ramp bridge anti-collision guardrail construction device of the embodiment of the present application.

[0033] Reference numerals: 1, base; 11, moving wheel; 12, truss; 13, counterweight; 14, walking mechanism; 15, working platform; 2, conveying plate; 21, screw rod 1; 22, guide rod 1; 23, motor 1; 24, hand chain hoist 1; 3, placement box; 31, lifting ring; 32, material feeding slot; 33, bearing plate; 34, moving slot; 35, moving plate; 36, screw rod 2; 37, worm wheel; 38, worm; 39. Motor 2; 4. Baffle; 41. Fixed block; 42. Connecting rod; 43. Connecting plate; 44. Limit block; 45. Torsion spring; 5. Abutment plate; 51. Screw 3; 511. Displacement groove; 52. Gear 1; 521. Displacement block; 53. Rotating rod; 54. Gear 2; 55. Motor 3; 6. Control block; 61. Control groove; 62. Spring 1; 63. Slide groove; 64. Moving plate 1; 65. Fixed plate 1. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-7 This application is described in further detail.

[0035] The present application discloses a small curve ramp bridge anti-collision guardrail construction device and construction method. Figure 1 and Figure 2 The construction device of the anti-collision guardrail of a small curved ramp bridge includes a base 1, a moving wheel 11 is installed on the bottom surface of the base 1, and a truss 12 is fixed on the top surface of the base 1. A counterweight 13 is installed on one side of the truss 12, and a walking mechanism 14 and a working platform 15 are installed on the other side of the truss 12. A horizontally arranged screw rod 21 is rotatably installed on the truss 12, and a horizontally arranged guide rod 22 is fixed on the truss 12. The outer periphery of the screw rod 21 and the guide rod 22 is sleeved with a conveying plate 2, and the conveying plate 2 is threadedly matched with the screw rod 21. A motor 23 is fixed on the truss 12, and the output end of the motor 23 is fixedly connected to the end of the screw rod 21. A placement box 3 with an opening on the top surface is installed below the conveying plate 2, and the placement box 3 is used to place the template. Hand winches 24 are respectively installed at the corners of the bottom surface of the conveying plate 2, and lifting rings 31 are respectively fixed at the two ends of the top of the placement box 3, and the hooks of the hand winches 24 are connected to the lifting rings 31.

[0036] Reference Figure 3 and Figure 4, the bottom surface of the placement box 3 is provided with a material discharge slot 32, and the placement box 3 is vertically slidably installed with a bearing plate 33 through the material discharge slot 32, and the top surface of the bearing plate 33 is in contact with the bottom surface of the template. The bottom surface of the placement box 3 is provided with two movable slots 34, and the placement box 3 is vertically slidably installed with a movable plate 35 through the movable slot 34, and the bottom end of the movable plate 35 is fixedly connected to the bearing plate 33. A screw rod 2 36 is rotatably installed in the movable slot 34, and the movable plate 35 is sleeved on the outer periphery of the screw rod 2 36, and the movable plate 35 and the screw rod 2 36 are threadedly matched. A worm gear 37 is sleeved and fixed on the outer periphery of the screw rod 2 36, and a worm 38 is rotatably installed in the side plate of the placement box 3, and the worm 38 and the worm gear 37 are meshed with each other. A motor 2 39 is installed on the side of the placement box 3, and the output end of the motor 2 39 is fixedly connected to the end of the worm 38.

[0037] Start motor 23, motor 23 drives screw 21 to rotate, screw 21 drives conveying plate 2 to move toward the direction close to working platform 15, so that supporting plate 33 moves to directly above working platform 15, start motor 2 39, motor 2 39 drives worm 38 to rotate, worm 38 drives two worm wheels 37 to rotate synchronously, and then drives two screws to rotate synchronously, screw 2 36 drives movable plate 35 to move vertically, and movable plate 35 drives supporting plate 33 to move downward.

[0038] Reference Figure 5 and Figure 6 A baffle 4 is fixed to the bottom surface of the placement box 3, and the baffle 4 is located on the side of the bearing plate 33 away from the abutment plate 5. When the bearing plate 33 drives the template to move downward, the template is located on the side of the baffle 4 away from the construction personnel, reducing the possibility of the template tilting toward the side close to the construction personnel. Two fixed blocks 41 are fixed to the bottom surface of the placement box 3, and a connecting rod 42 is rotatably installed between the two fixed blocks 41. The outer periphery of the connecting rod 42 is provided with a connecting plate 43, and the connecting plate 43 is located on the side of the bearing plate 33 away from the baffle 4. A limiting block 44 is fixed to the bottom surface of the placement box 3, and the side of the connecting plate 43 close to the baffle 4 can fit with the limiting block 44. A torsion spring 45 is provided on the outer periphery of the connecting rod 42, and one end of the torsion spring 45 is fixedly connected to the fixed block 41, and the other end of the torsion spring 45 is fixedly connected to the connecting plate 43.

[0039] Reference Figure 5 and Figure 7, an abutment plate 5 is installed in the placement box 3 along its own length direction, and the side of the abutment plate 5 close to the working platform 15 can abut against the template. A screw rod 3 51 is penetrated on the side of the placement box 3 away from the working platform 15, and the end of the screw rod 3 51 is rotatably connected to the abutment plate 5, and the screw rod 3 51 is threadedly matched with the placement box 3. The outer periphery of the screw rod 3 51 is sleeved with a gear 1 52, and the inner periphery of the gear 1 52 is fixed with a clearance block 521. The outer periphery of the screw rod 3 51 is provided with a clearance groove 511, and the clearance block 521 is slidably matched with the screw rod 3 51 through the clearance groove 511. A rotating rod 53 is rotatably installed on the side of the placement box 3, and a gear 2 54 is sleeved and fixed on the outer periphery of the rotating rod 53, and the gear 2 54 and the gear 1 52 are meshed with each other. A motor 3 55 is installed on the placement box 3, and the output end of the motor 3 55 is fixedly connected to the end of the rotating rod 53.

[0040] Reference Figure 5 and Figure 7 A control groove 61 is provided on the side of the abutting plate 5 away from the screw rod 3 51, and a control block 6 is slidably installed on the abutting plate 5 along its thickness direction through the control groove 61. A spring 1 62 is fixed on the side of the control block 6 close to the screw rod 3 51, and one end of the spring 1 62 away from the control block 6 is fixedly connected to the inner wall of the control groove 61. A moving piece 1 64 is fixed on the side of the control block 6, and a sliding groove 63 is provided on the inner wall of the control groove 61, and the moving piece 1 64 slides and cooperates with the abutting plate 5 through the sliding groove 63. A fixed piece 1 65 is fixed on the inner wall of the sliding groove 63 away from the screw rod 3 51, and the moving piece 1 64 can be in electrical contact with the fixed piece 1 65. The fixed piece 1 65 is electrically connected to the power supply, and the moving piece 1 64 is electrically connected to the motor 3 55.

[0041] When the template is separated from the abutment plate 5, the control block 6 moves toward the direction close to the template under the elastic force of the spring 1 62, so that the movable plate 1 64 is electrically contacted with the fixed plate 1 65, the motor 3 55 is energized to work, the abutment plate 5 moves toward the direction close to the template, the control block 6 abuts against the template and enters the control groove 61, the movable plate 1 64 and the fixed plate 1 65 are separated, and the abutment plate 5 stops moving, thereby realizing precise control of the position of the abutment plate 5 and improving the level of automation of template installation.

[0042] The implementation principle of a small curve ramp bridge anti-collision guardrail construction device in an embodiment of the present application is: a number of templates are placed in the placement box 3 in sequence, the placement box 3 is moved to the top of the working platform 15, and the load-bearing plate 33 drives the upper template to move downward, and the template is moved to the working platform 15 to facilitate the construction personnel to install the template, and the abutment plate 5 pushes the remaining template in the placement box 3 to the side close to the load-bearing plate 33, so that the bottom surface of the template is in contact with the top surface of the load-bearing plate 33, so that the load-bearing plate 33 drives the template to move downward, and the construction personnel only need to transfer the template on the load-bearing plate 33 to the construction platform, and the template installation efficiency is relatively high.

[0043] A method for constructing a small curve ramp bridge anti-collision guardrail comprises the following steps: S1. Accurately process and assemble the steel formwork, strictly control the size error within 2mm, ensure the rigidity and surface finish of the formwork, and prevent deformation; S2. Make fine adjustments after the formwork is tested, remove loose rust and evenly apply release agent, accurately lay out and adjust the steel bars through the total station, ensure the thickness of the protective layer and the straightness of the line, install the formwork and conduct a strict inspection; S3. Prepare concrete according to the laboratory mix ratio, pour it evenly in three layers and strictly control the vibration time to ensure the uniformity and strength of the concrete; S4. Choose the appropriate demolding time according to the ambient temperature and concrete strength. Immediately cover the concrete with geotextile for curing after demolding, conduct a comprehensive quality inspection, and promptly handle any problems found.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A small curve ramp bridge anti-collision guardrail construction device, comprising a base (1), a truss (12), a counterweight (13), a walking mechanism (14) and a working platform (15), characterized in that: A placement box (3) with an opening on the top surface is slidably installed on the truss (12), and a contact plate (5) is slidably installed in the placement box (3). The side of the contact plate (5) close to the working platform (15) can contact the template. A material discharge groove (32) is opened on the bottom surface of the placement box (3). A bearing plate (33) is slidably installed on the placement box (3) along the vertical direction through the material discharge groove (32). The top surface of the bearing plate (33) is in contact with the bottom surface of the template. A driving component for driving the placement box (3) to move to above the working platform (15) is provided on the truss (12), and a moving component for driving the bearing plate (33) to move downward is provided on the placement box (3).

2. A small curve ramp bridge anti-collision guardrail construction device according to claim 1, characterized in that: A conveying plate (2) is installed on the top of the placement box (3), and hand chain hoists (24) are installed at both ends of the conveying plate (2). Lifting rings (31) are fixed at both ends of the top of the placement box (3), and the hooks of the hand chain hoists (24) are connected to the lifting rings (31).

3. A small curve ramp bridge anti-collision guardrail construction device according to claim 2, characterized in that: The driving assembly comprises a screw rod (21) rotatably mounted on the truss (12) and a guide rod (22) fixed on the truss (12); the conveying plate (2) is sleeved on the outer periphery of the screw rod (21) and the guide rod (22); the conveying plate (2) and the screw rod (21) are threadedly matched; a motor (23) is fixed on the truss (12); and the output end of the motor (23) is fixedly connected to the end of the screw rod (21).

4. The small curve ramp bridge anti-collision guardrail construction device according to claim 1 is characterized by: The moving assembly comprises a screw rod 2 (36) rotatably mounted in the placement box (3); a moving groove (34) is provided on the bottom surface of the placement box (3); a moving plate (35) is vertically slidably mounted on the placement box (3) through the moving groove (34); the moving plate (35) is sleeved on the outer periphery of the screw rod 2 (36); the moving plate (35) and the screw rod 2 (36) are threadedly matched; the bottom end of the moving plate (35) is fixedly connected to the supporting plate (33); and a synchronization assembly for driving the two screw rods 2 (36) to rotate synchronously is provided on the placement box (3).

5. The small curve ramp bridge anti-collision guardrail construction device according to claim 4 is characterized by: The synchronization component comprises a worm wheel (37) sleeved and fixed on the outer periphery of the second screw (36); a worm (38) is rotatably installed in the placement box (3); the worm (38) and the worm wheel (37) are meshed with each other; a second motor (39) is installed on the side of the placement box (3); the output end of the second motor (39) is fixedly connected to the end of the worm (38).

6. The small curve ramp bridge anti-collision guardrail construction device according to claim 1 is characterized by: The side of the placement box (3) away from the working platform (15) is provided with a screw rod (51), the end of the screw rod (51) is rotatably connected to the abutment plate (5), the screw rod (51) and the placement box (3) are threadedly matched, the outer circumference of the screw rod (51) is provided with a clearance groove (511), the outer circumference of the screw rod (51) is sleeved with a gear (52), and the inner circumference of the gear (52) is fixed with a clearance block (521). The giving way block (521) is slidably matched with the screw rod three (51) through the giving way groove (511); a rotating rod (53) is rotatably installed on the side of the placement box (3); a gear two (54) is fixedly sleeved on the outer periphery of the rotating rod (53); the gear two (54) and the gear one (52) are meshed with each other; a motor three (55) is installed on the placement box (3); and the output end of the motor three (55) is fixedly connected to the end of the rotating rod (53).

7. The small curve ramp bridge anti-collision guardrail construction device according to claim 6 is characterized by: A control groove (61) is provided on the side of the abutting plate (5) away from the screw rod three (51), and a control block (6) is slidably mounted on the abutting plate (5) along its thickness direction through the control groove (61). A spring (62) is fixed on the side of the control block (6) close to the screw rod three (51), and one end of the spring (62) away from the control block (6) is fixedly connected to the inner wall of the control groove (61). A movable spring (62) is fixed on the side of the control block (6). The movable plate (64) is provided with a slide groove (63) on the inner wall of the control groove (61), and the movable plate (64) is slidably matched with the abutment plate (5) through the slide groove (63), and a fixed plate (65) is fixed on the inner wall of the slide groove (63) away from the screw rod (51), and the movable plate (64) can be in electrical contact with the fixed plate (65), and the fixed plate (65) is electrically connected to the power supply, and the movable plate (64) is electrically connected to the motor (55).

8. The small curve ramp bridge anti-collision guardrail construction device according to claim 1 is characterized by: A baffle (4) is fixed to the bottom surface of the placement box (3), and the baffle (4) is located on a side of the bearing plate (33) away from the abutment plate (5).

9. The small curve ramp bridge anti-collision guardrail construction device according to claim 8, characterized in that: Two fixed blocks (41) are fixed on the bottom surface of the placement box (3), a connecting rod (42) is rotatably installed between the two fixed blocks (41), a connecting plate (43) is sleeved on the outer periphery of the connecting rod (42), the connecting plate (43) is located on the side of the bearing plate (33) away from the baffle (4), a limiting block (44) is fixed on the bottom surface of the placement box (3), the side of the connecting plate (43) close to the baffle (4) can fit with the limiting block (44), a torsion spring (45) is sleeved on the outer periphery of the connecting rod (42), one end of the torsion spring (45) is fixedly connected to the fixed block (41), and the other end of the torsion spring (45) is fixedly connected to the connecting plate (43).

10. A construction method for a small curve ramp bridge anti-collision guardrail, based on a small curve ramp bridge anti-collision guardrail device according to any one of claims 1 to 9, characterized in that: The steps include: S1. Accurately process and assemble the steel formwork, strictly control the size error within 2mm, ensure the rigidity and surface finish of the formwork, and prevent deformation; S2. Make fine adjustments after the formwork is tested, remove loose rust and evenly apply release agent, accurately lay out and adjust the steel bars through the total station, ensure the thickness of the protective layer and the straightness of the line, install the formwork and conduct a strict inspection; S3. Prepare concrete according to the laboratory mix ratio, pour it evenly in three layers and strictly control the vibration time to ensure the uniformity and strength of the concrete; S4. Choose the appropriate demolding time according to the ambient temperature and concrete strength. Immediately cover the concrete with geotextile for curing after demolding, conduct a comprehensive quality inspection, and promptly handle any problems found.

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