Steel box girder guardrail construction bottomed platform

Abstract

The present application relates to the technical field of construction platform, and particularly relates to a steel box girder guardrail construction bottom-hanging platform, which comprises a main slide rail of a C-shaped channel steel structure pre-fixed on a construction side of a steel box girder, and a stop table is arranged at an opening end of the main slide rail; a support structure is composed of a plurality of horizontally arranged main support rods, adjacent main support rods are connected through a shear type telescopic stand, and plastic steel corrugated boards are arranged on the upper part to form a construction platform; a sliding clamping part is arranged at a proximal end of the main support rod, the V-shaped frame is tightly abutted against the main slide rail to be fixed when the V-shaped frame is contracted, and the V-shaped frame can be in and out of the slide rail when the V-shaped frame is extended, a positioning plate and a locking hole are assembled on the main slide rail, a steel wire rope is connected to a distal end of an outer main support rod and connected to an engineering vehicle, and the support structure can be moved by traction. Auxiliary slide rails and reinforcing rods can be additionally arranged to improve the bearing stability, and embedded bolts are arranged at distal ends of the main support rods to be used for fixing anti-collision meshes. The platform can realize quick and accurate adjustment of construction and maintenance positions, is fixed and stable, convenient to disassemble and assemble, perfect in protection, and can improve operation efficiency and reduce comprehensive cost.

Description

Technical Field

[0001] This invention relates to the field of construction platform technology, specifically to a support platform for the construction of steel box girder guardrails. Background Technology

[0002] In the construction of steel box girder bridges, guardrail installation is a crucial step to ensure subsequent traffic safety. The bottom support platform, as a core auxiliary device for guardrail installation, directly impacts construction efficiency and operational safety due to its safety, flexibility, and practicality. Currently, most existing bottom support platforms for steel box girder guardrail construction use a fixed, integrated installation structure. Adjusting the construction position requires dismantling and reassembling the entire platform, which is not only cumbersome and time-consuming but also significantly reduces construction efficiency due to repeated dismantling and reassembly. Some movable platforms have unreasonable sliding and fixing structure designs, resulting in high frictional resistance during sliding and requiring multiple people to push them, leading to high labor intensity. Furthermore, fixing methods often rely on bolt tightening or clip locking, making the operation complex and unable to achieve rapid linkage between sliding and fixing. Subsequent maintenance is also inconvenient. The existing platform's sliding rails are often dismantled simultaneously with the supporting structure. When maintenance of the guardrail or steel box girder is needed, the sliding rails must be reinstalled, and the supporting structure position must be gradually adjusted from one end of the rails. This prevents precise and rapid positioning for maintenance, increasing maintenance costs and time.

[0003] These shortcomings mean that existing support platforms cannot fully meet the needs of high efficiency, safety, and convenience in the construction of steel box girder guardrails. Therefore, there is an urgent need for a support platform for the construction of steel box girder guardrails that is structurally reasonable, easy to operate, and safe and reliable. Summary of the Invention

[0004] In response to the aforementioned defects and problems of existing steel box girder guardrail construction support platforms, such as cumbersome adjustment, unstable fixing, insufficient load-bearing capacity, and inconvenient maintenance, this invention provides a steel box girder guardrail construction support platform that enables rapid and accurate adjustment and stability of construction and maintenance positions, significantly improving work efficiency.

[0005] The solution adopted by this invention to solve its technical problem is: a construction support platform for steel box girder guardrails, including a main slide rail pre-fixed to the construction side of the steel box girder. The main slide rail is a C-shaped channel steel structure, with a stop provided inward at its open end to make the opening height less than the height inside the channel. It also includes a support structure and a sliding clamping component. The support structure consists of multiple main support rods arranged horizontally along the length of the main slide rail. Adjacent main support rods are connected by a scissor-type telescopic frame. Plastic steel corrugated sheets are laid on the support structure to form a construction platform. The sliding clamping component... The component is located near the main support rod, which is slidably connected to the main slide rail via a sliding clamping component. During construction, the main support rod is clamped and fixed in the main slide rail by the sliding clamping component. The sliding clamping component includes a V-shaped frame fitted inside the main slide rail. When the support structure is retracted and not in use, the V-shaped frame is in an extended state, and its overall height is less than the opening height of the main slide rail, so that the sliding clamping component can enter and exit the main slide rail. When the support structure is unfolded and in use, the V-shaped frame is in a retracted state, and its upper and lower ends are tightly pressed against the main slide rail to achieve clamping support for the main support rod.

[0006] Furthermore, the sliding mounting component includes a fixed shaft and a moving shaft arranged parallel to each other near the main support rod. The fixed shaft is fitted onto the main support rod, and the moving shaft is slidably connected to a groove opened in the side wall of the main slide rail. Connecting rods are fitted onto both the fixed shaft and the moving shaft. The upper ends of the two connecting rods are hinged together to form a V-shaped frame, and a spring is connected to the inner side of the lower end. Rigid pulleys are installed at both the upper and lower ends of the V-shaped frame. A push rod is horizontally installed on the moving shaft. An arc-shaped push plate is provided on the rod of the scissor-type telescopic frame near the push rod. When the scissor-type telescopic frame is extended, the arc-shaped push plate synchronously pushes the push rod to move inward, so that the V-shaped frame becomes a retracted support state.

[0007] Furthermore, the main support rod has inward grooves on both the front and rear sides, and a guide groove is provided through the far end of the groove. The two ends of the scissor telescopic frame are equipped with pins, one of which is fitted into a fixed position in the groove, and the other pin is slidably fitted into the guide groove.

[0008] Furthermore, an auxiliary slide rail is fixed on the construction side of the steel box girder. The auxiliary slide rail is located below and parallel to the main slide rail. A reinforcing rod is inclinedly welded and fixed below the far end of the main support rod. A slider is installed at the near end of the reinforcing rod. The slider is adapted to the auxiliary slide rail and is slidably fitted therein.

[0009] Furthermore, a positioning plate is provided on the main slide rail extending towards the main support rod, and a locking hole is provided through the near end of the main support rod and the positioning plate. The main support rod is locked in position by inserting a locking pin into the locking hole.

[0010] Furthermore, the far ends of the two outermost main support rods are connected to steel wire ropes, and the other ends of the steel wire ropes are connected to and fixed to an engineering vehicle traveling on the steel box girder.

[0011] Furthermore, each main support rod has a pre-embedded bolt vertically installed at its far end, which is used to fix the anti-collision mesh.

[0012] The beneficial effects of this invention are as follows: The main slide rail is pre-fixed to the construction side of the steel box girder. The support structure is slidably connected to the main slide rail via a sliding clamping component. With the assistance of a traction steel cable from an engineering vehicle, the support structure can be moved without manual pushing. Furthermore, rigid pulleys are installed at the upper and lower ends of the V-shaped frame of the sliding clamping component, converting sliding friction into rolling friction, significantly reducing movement resistance and allowing the support structure to be quickly and smoothly adjusted to the target construction position. Simultaneously, the main slide rail does not need to be removed after construction. During subsequent maintenance, the support structure can be directly installed into the corresponding area of ​​the main slide rail via the sliding clamping component according to the maintenance location, eliminating the need for gradual adjustment from the slide rail head. This achieves precise and rapid positioning of the maintenance location, avoids the tedious process of repeatedly installing the slide rail, significantly shortens the construction and maintenance period, and reduces overall costs.

[0013] The sliding clamping component employs a design that combines a V-shaped frame with springs, push rods, and an arc-shaped push plate. When the scissor-type telescopic frame unfolds, it simultaneously drives the arc-shaped push plate to push the push rod, causing the V-shaped frame to retract and press tightly against the inner wall of the main slide rail cavity via rigid pulleys at the upper and lower ends. This lateral clamping force achieves initial fixation of the support structure. Combined with the double locking of the positioning plate and locking pins, a stable fixation effect is formed, effectively resisting the influence of external forces such as vibration and wind during construction and preventing displacement of the support structure. Furthermore, the support structure and the main slide rail are detachably connected via the sliding clamping component. When the V-shaped frame of the sliding clamping component naturally extends under the action of the spring, its overall height is less than the opening height of the main slide rail, allowing for smooth entry and exit from the main slide rail. Installation and removal of the support structure can be completed without complex tools, making operation convenient and efficient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall front view of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is an exploded view of the slide rail and support structure of the present invention; Figure 5 This is a structural diagram showing the fit between the slide rail and the support structure of the present invention; Figure 6 This is a front view of the sliding mounting component of the present invention; Figure 7 This is a side view of the sliding mounting component of the present invention. Figure 8 This is a schematic diagram of the main support rod and main slide rail of the present invention; Figure 9 This is a three-dimensional structural diagram of the sliding mounting component of the present invention.

[0015] In the diagram: 1. Main slide rail; 101. Positioning plate; 102. Locking hole; 103. Slide groove; 2. Auxiliary slide rail; 3. Main support rod; 301. Groove; 302. Guide groove; 303. Pin shaft; 4. Scissor-type telescopic frame; 5. Reinforcing rod; 6. Slider; 7. Sliding clamping component; 701. Fixed shaft; 702. Moving shaft; 703. Connecting rod; 704. Rigid pulley; 705. Push rod; 706. Spring; 8. Arc-shaped push plate; 9. Steel wire rope; 10. Engineering vehicle; 11. Plastic steel corrugated sheet; 12. Embedded bolt. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please see Figure 1-9 This invention provides a technical solution for a support platform for the construction of steel box girder guardrails: Example 1: This example provides a support platform for the construction of steel box girder guardrails. Through a sliding and quickly snap-fit ​​support structure, it enables flexible adjustment and stable support of the construction position.

[0018] First, the main slide rail 1 is pre-fixed on the construction side of the steel box girder. The main slide rail 1 is made of C-shaped channel steel, with its open end located away from the steel box girder. The open end is bent inward to form a retaining structure, making the actual opening height of the slot less than the internal height of the slot cavity. This structure provides installation space for the subsequent sliding clamping component 7 and also restricts the disengagement of the sliding clamping component 7 through the retaining structure, thus providing installation space for the supporting structure. The main slide rail 1 is fixed to the steel box girder by welding or high-strength bolt connection, ensuring that it forms a stable whole with the steel box girder structure and does not need to be removed after construction, reserving an installation foundation for subsequent maintenance work.

[0019] like Figure 4 and Figure 5As shown, the support structure consists of multiple main support rods 3 arranged horizontally along the length of the main slide rail 1. Adjacent main support rods 3 are connected by a scissor-type telescopic frame 4. Each end of the scissor-type telescopic frame 4 is equipped with a pin 303. Correspondingly, the front and rear sides of the main support rod 3 are recessed inward to form grooves 301. A long guide groove 302 is provided at the far end of the groove 301. One end of the pin 303 of the scissor-type telescopic frame 4 is fixedly fitted into a preset fixed point in the groove 301, while the other end of the pin 303 is slidably fitted into the guide groove 302. When the scissor-type telescopic frame 4 expands or retracts, the sliding pin 303 can move synchronously along the guide groove 302, thereby causing the multiple main support rods 3 to move closer or further away synchronously, realizing the telescopic adjustment of the support structure. Plastic steel corrugated sheet 11 is laid on top of the support structure. The plastic steel corrugated sheet 11 is fixedly connected to the main support rod 3 by bolts to form a flat construction operation platform. The sheet has both lightweight and high strength characteristics, which can reduce the overall load of the support structure and meet the load-bearing requirements of construction personnel and tools.

[0020] The near end of the main support rod 3 is equipped with a sliding locking component 7, which is the main structure for realizing the sliding connection and locking fixation between the main support rod 3 and the main slide rail 1. Figure 6 , Figure 7 and Figure 9As shown, the sliding mounting component 7 includes a fixed shaft 701 and a movable shaft 702 arranged in parallel. The fixed shaft 701 is fixedly mounted on the near end of the main support rod 3, while the movable shaft 702 is movably mounted. When the sliding mounting component 7 is installed inside the main slide rail 1, the movable shaft 702 is slidably mounted in a pre-set groove 103 on the side wall of the main slide rail 1. The groove 103 extends along the length of the main slide rail 1, providing directional guidance for the movable shaft 702. Connecting rods 703 are movably mounted on both the fixed shaft 701 and the movable shaft 702. The upper ends of the two connecting rods 703 are hinged to each other, forming a V-shaped frame structure. A spring 706 is horizontally connected to the inner side of the lower end of the V-shaped frame, and rigid pulleys 704 are installed at both the upper and lower ends of the V-shaped frame. A push rod 705 is horizontally installed on the main support rod 3 corresponding to the moving shaft 702. In order to ensure that the push rod 705 is always in a horizontal state, a clearance groove can be opened on the moving shaft 702. The push rod 705 is installed on the moving shaft 702. An arc-shaped push plate 8 is fixedly installed on the rod body of the scissor telescopic frame 4 near the push rod 705. When the support structure is in a retracted and unused state, the spring 706 is in a naturally extended state, causing the V-shaped frame to unfold. At this time, the overall height of the V-shaped frame is less than the opening height of the main slide rail 1, allowing the sliding clamping component 7 to freely enter and exit the main slide rail 1. When the scissor telescopic frame 4 unfolds, the rod body drives the arc-shaped push plate 8 to move synchronously. The arc-shaped push plate 8 contacts the push rod 705 and pushes it to move inward, thereby driving the moving shaft 702 to move closer to the fixed shaft 701 along the slide groove 103, causing the V-shaped frame to gradually retract. The rigid pulleys 704 at the upper and lower ends are respectively pressed against the upper and lower inner walls of the groove cavity of the main slide rail 1. The point contact of the rigid pulleys 704 reduces friction. At the same time, the lateral pressure generated by the retraction of the V-shaped frame is used to fix the main support rod 3, ensuring that the support structure will not shift during construction.

[0021] To further improve the reliability of the fixation, a positioning plate 101 is welded to the main slide rail 1 in the direction of the main support rod 3. The near end of the main support rod 3 and the positioning plate 101 are respectively provided with locking holes 102. Multiple locking holes 102 are arranged along the length of the positioning plate 101. After the support structure is adjusted to the preset construction position and initially fixed by the sliding clamping component 7, the locking pin is inserted into the locking hole 102 to form a double fixation, which effectively avoids loosening caused by vibration and other factors during construction.

[0022] In addition, such as Figure 2 As shown, steel wire ropes 9 are connected to the far ends of the two outermost main support rods 3. The other end of the steel wire ropes 9 is fixedly connected to the engineering vehicle 10 traveling on the steel box girder. The traction force of the engineering vehicle 10 is used to drive the support structure to move along the main slide rail 1, so as to realize the rapid adjustment of the construction position without manual pushing, which improves the construction efficiency and reduces the difficulty of operation.

[0023] The operation process of the steel box girder guardrail construction support platform of the present invention is as follows: First, during the construction of the steel box girder, after the main slide rail 1 has been pre-fixed to the construction side of the steel box girder by welding or high-strength bolts, the sliding clamping component 7 at the near end of the support structure is aligned with the opening direction of the main slide rail 1. At this time, the V-shaped frame of the sliding clamping component 7 is in an unfolded state under the natural extension of the spring 706. Its overall height is less than the opening height of the main slide rail 1, so the V-shaped frame can be smoothly pushed into the groove of the main slide rail 1, completing the initial installation of the support structure and the main slide rail 1. Subsequently, the operator unfolds the scissor telescopic frame 4 manually or mechanically. During the extension process, the rod of the scissor telescopic frame 4 synchronously drives the arc-shaped push plate 8 to move towards the push rod 705. After the arc-shaped push plate 8 contacts the push rod 705, it generates a continuous thrust, pushing the push rod 705 and the moving shaft 702 closer to the fixed shaft 701, causing the V-shaped frame to gradually retract. The rigid pulleys 704 at its upper and lower ends press tightly against the upper and lower inner walls of the groove cavity of the main slide rail 1. The lateral clamping force formed by the retraction of the V-shaped frame achieves the initial clamping and fixing of the support structure.

[0024] To further ensure stability during construction, operators insert locking pins into the locking holes 102 corresponding to the positioning plate 101 near the main support rod 3, forming a double fixation. This effectively resists the influence of external forces such as vibration and wind during construction, preventing displacement of the support structure and providing a safe and reliable working platform for construction personnel. During construction, the flat platform formed by the PVC corrugated sheet 11 can stably support construction personnel and tools and equipment. Its lightweight and high-strength characteristics reduce the overall load on the support structure while meeting the construction load-bearing requirements.

[0025] After the guardrail construction in the area is completed, the operator first pulls out the locking pin in the locking hole 102, and then starts the engineering vehicle 10 traveling on the steel box girder. The steel wire rope 9 connected to the far end of the two outer main support rods 3 generates traction force, which drives the entire support structure to slide along the length of the main slide rail 1. During this period, the moving shaft 702 moves synchronously and directionally along the slide groove 103 on the side wall of the main slide rail 1. The rigid pulleys 704 at the upper and lower ends of the V-shaped frame form rolling contact with the inner wall of the groove cavity of the main slide rail 1, which effectively reduces the frictional resistance during the movement, so that the support structure can be quickly and smoothly adjusted to the target construction position without manual pushing, which greatly saves labor costs.

[0026] The main slide rail 1 remains on the steel box girder without being removed. When maintenance work is required on the guardrail or steel box girder, the support structure can be directly installed into the corresponding area of ​​the main slide rail 1 through the sliding clamping component 7 according to the maintenance location. There is no need to move and adjust it step by step from the head of the slide rail, which can achieve accurate and rapid positioning of the maintenance location, significantly improve the efficiency of maintenance work, and avoid the tedious process of repeatedly installing the slide rail, thus reducing the overall cost of subsequent maintenance.

[0027] Example 2: Based on Example 1, the similarities between this example and Example 1 will not be repeated. The differences are as follows: On the construction side of the steel box girder, an auxiliary slide rail 2 is fixed parallel to the main slide rail 1 directly below it. The auxiliary slide rail 2 adopts a U-shaped channel steel structure, and its fixing method is consistent with that of the main slide rail 1 to ensure the stability of the connection with the steel box girder structure. Below the distal end of each main support rod 3, an inclined reinforcing rod 5 is fixed by welding. The reinforcing rod 5 forms a preset angle with the main support rod 3, transferring the force at the distal end of the main support rod 3 to the auxiliary slide rail 2, forming a multi-point support structure. A slider 6 is installed at the proximal end of the reinforcing rod 5. The size of the slider 6 is adapted to the groove cavity of the auxiliary slide rail 2, and the slider 6 is slidably fitted inside the auxiliary slide rail 2, allowing the slider 6 to move freely along the length direction of the auxiliary slide rail 2.

[0028] When the support structure slides along the main slide rail 1, the distal end of the main support rod 3 drives the slider 6 to slide synchronously along the auxiliary slide rail 2 via the reinforcing rod 5. The main slide rail 1 and the auxiliary slide rail 2 form a double-rail support that is parallel to each other, which not only limits the vertical swaying of the main support rod 3, but also provides bidirectional guidance, ensuring the stability of the support structure during movement. At the same time, the inclined setting of the reinforcing rod 5 can effectively distribute the vertical and horizontal loads borne by the distal end of the main support rod 3, avoiding bending deformation caused by the excessive cantilever of the distal end of the main support rod 3, thereby improving the load-bearing capacity of the entire construction platform.

[0029] Example 3: Based on Example 1 or Example 2, this example adds a construction safety protection structure. Specifically, the anti-collision mesh is fixed by setting pre-embedded bolts 12 at the far end of the main support rod 3.

[0030] At the far end of each main support rod 3, a pre-embedded bolt 12 is welded vertically upward. The number of pre-embedded bolts 12 is set according to the fixing requirements of the anti-collision mesh. The exposed length of the pre-embedded bolts 12 meets the installation requirements of the anti-collision mesh. During construction, the anti-collision mesh is fitted onto the pre-embedded bolts 12 through the pre-set bolt holes on its edge, and then tightened with nuts to achieve a stable connection between the anti-collision mesh and the main support rod 3. This can effectively prevent construction personnel or tools from falling from the edge of the platform, while not affecting the construction personnel's operating vision and working space.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction support platform for steel box girder guardrails, comprising a main slide rail (1) pre-fixed to the construction side of the steel box girder, wherein the main slide rail (1) is a C-shaped channel steel structure, and a baffle is provided at its open end so that the opening height is less than the height inside the channel, characterized in that, It also includes a support structure and a sliding clamping component (7). The support structure consists of multiple main support rods (3) arranged horizontally along the length of the main slide rail (1). Adjacent main support rods (3) are connected by a scissor-type telescopic frame (4). Plastic steel corrugated plates (11) are laid on the support structure to form a construction platform. The sliding clamping component (7) is located at the near end of the main support rod (3). The main support rod (3) is slidably connected to the main slide rail (1) through the sliding clamping component (7) and is connected during construction by... The sliding clamping component (7) clamps and fixes the main support rod (3) inside the main slide rail (1); the sliding clamping component (7) includes a V-shaped frame fitted inside the main slide rail (1). When the support structure is retracted and not in use, the V-shaped frame is in an extended state, and its overall height is less than the opening height of the main slide rail (1) so that the sliding clamping component (7) can enter and exit the main slide rail (1). When the support structure is unfolded and in use, the V-shaped frame is in a retracted state, and its upper and lower ends are tightly pressed against the main slide rail (1) to realize the clamping support of the main support rod (3).

2. The steel box girder guardrail construction support platform according to claim 1, characterized in that, The sliding mounting component (7) includes a fixed shaft (701) and a movable shaft (702) arranged parallel to each other near the end of the main support rod (3). The fixed shaft (701) is fitted onto the main support rod (3), and the movable shaft (702) is slidably connected to a groove (103) opened in the side wall of the main slide rail (1). A connecting rod (703) is fitted onto both the fixed shaft (701) and the movable shaft (702). The upper ends of the two connecting rods (703) are hinged together to form a V-shaped frame. A spring (706) is connected to the inner side of the lower end of the V-shaped frame, and rigid pulleys (704) are installed at both the upper and lower ends of the V-shaped frame. A push rod (705) is horizontally installed on the moving shaft (702). An arc-shaped push plate (8) is provided on the rod of the scissor telescopic frame (4) near the push rod (705). When the scissor telescopic frame (4) is unfolded, the arc-shaped push plate (8) pushes the push rod (705) inward in sync, so that the V-shaped frame becomes a retracted support state.

3. The steel box girder guardrail construction support platform according to claim 1, characterized in that, The main support rod (3) has grooves (301) on both the front and rear sides. A guide groove (302) is provided at the far end of the groove (301). Pins (303) are installed at both ends of the scissor telescopic frame (4). One pin (303) is fitted in a fixed position in the groove (301), and the other pin (303) is slidably fitted in the guide groove (302).

4. The steel box girder guardrail construction support platform according to claim 1, characterized in that, A secondary slide rail (2) is also fixed on the construction side of the steel box girder. The secondary slide rail (2) is located below and parallel to the main slide rail (1). A reinforcing rod (5) is welded and fixed at the far end of the main support rod (3). A slider (6) is installed at the near end of the reinforcing rod (5). The slider (6) is adapted to the secondary slide rail (2) and slides within it.

5. The steel box girder guardrail construction support platform according to claim 1, characterized in that, A positioning plate (101) is provided on the main slide rail (1) extending towards the main support rod (3). A locking hole (102) is provided through the near end of the main support rod (3) and the positioning plate (101). The main support rod (3) is locked in position by inserting a locking pin into the locking hole (102).

6. The steel box girder guardrail construction support platform according to claim 1, characterized in that, The outermost two main support rods (3) are connected to steel wire ropes (9) at their far ends, and the other end of the steel wire ropes (9) is connected and fixed to the engineering vehicle (10) traveling on the steel box girder.

7. The steel box girder guardrail construction support platform according to claim 1, characterized in that, Each main support rod (3) has a pre-embedded bolt (12) vertically installed at its far end. The pre-embedded bolt (12) is used to fix the anti-collision mesh.

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