Prefabricated small box girder wet joint construction platform

Abstract

The utility model discloses a prefabricated small box girder wet joint construction platform. The prefabricated small box girder wet joint construction platform comprises a frame body, ladder rods, connecting rods, bottom supporting pieces, limiting rings and supporting plates. The two sets of frame bodies are rotationally connected with the two sides of the bottom supporting piece, and the tops of the frame bodies are hung on a steel frame structure in beam construction. A plurality of groups of ladder rods are arranged in the frame body in parallel for operators to climb in and out of the construction platform; the supporting plate is arranged at the top of the bottom supporting piece and is treaded by an operator; the connecting rods are arranged on the side edges of the frame bodies to connect the two frame bodies into a whole, so that the construction platform forms a stable enclosure structure, constructors are blocked, and the safety of the constructors is guaranteed; the top of the frame body and the steel frame structure are in limiting connection through the limiting rings, and the platform is prevented from shaking. The construction platform is simple in structure, convenient to erect, low in production cost, capable of being suitable for the auxiliary construction environment of the gap between the prefabricated bridges, easy to operate, capable of saving manpower and high in popularization value.

Description

Technical Field

[0001] The embodiments of this utility model belong to the technical field of bridge construction auxiliary devices, and more specifically, relate to a construction platform for wet joints of precast small box girders. Background Technology

[0002] Conventional precast elevated bridges typically employ steel box girder or small box girder structures. When the bridge width is significant, longitudinal segmentation is often considered during precasting. During assembly, the gaps between precast sections and the bottom of the precast sections require welding and painting. Currently, commonly used construction equipment includes full-span suspended scaffolding and aerial work platforms. Construction is carried out using either the suspended scaffolding with lifting rings or the aerial work platforms.

[0003] However, scaffolding erection is time-consuming and dangerous, impacting road traffic beneath the bridge. After construction, the lifting rings are difficult to cut, affecting aesthetics and the bridge's effective clearance height. Using aerial work platforms is subject to site limitations and also affects road traffic beneath the bridge. Especially in scenarios involving crossing rivers, intersections, or existing elevated sections, current construction equipment is not well-suited for these conditions.

[0004] Therefore, there is an urgent need for a convenient construction device for elevated bridges that is easy to install and construct, not limited by site conditions, and can ensure the safety of construction workers. Summary of the Invention

[0005] In view of the problems of low efficiency, high danger and traffic impact of existing box girder bridge gap and bottom construction auxiliary devices, this utility model provides a precast small box girder wet joint construction platform to solve these problems.

[0006] To achieve the above objectives, this utility model provides a precast small box girder wet joint construction platform, including a bottom support member that provides foot support for workers, with a support plate on top; a frame body that is rotatably connected to both sides of the bottom support member, with multiple sets of ladder rods arranged parallel inside to form a ladder-like structure for workers to climb into and out of the construction platform; the top of the frame body is suspended from the steel frame structure in bridge construction; connecting rods on both sides are respectively engaged with two sets of frame bodies; and a limiting ring that limits the connection between the top of the frame body and the steel frame structure.

[0007] Furthermore, a protective rod is fixedly installed on the top side of the frame. It is a U-shaped rod with both ends fixedly connected to the outer side of the top of the frame, thereby providing another support point for the frame.

[0008] Furthermore, a protective sleeve is provided on the top of the frame and the protective rods, and the protective sleeve is made of wear-resistant rubber material.

[0009] Furthermore, the support plate is also provided with a protective plate around its perimeter, which is snapped to the lower end of the frame by buckles, forming a protective enclosure above the bottom support member.

[0010] Furthermore, the limiting ring includes a tension spring and hooks fixed at both ends of the tension spring, one set of hooks being connected to one side of the protective rod, and the other set of hooks being hung on the steel frame structure.

[0011] Furthermore, the frame is a square frame structure, including a bottom rod, a top rod, an outer rod, and an inner rod, which are fixedly connected end to end as a whole.

[0012] Furthermore, the bottom support includes a bottom frame, support rods, and connecting shafts; wherein, the bottom frame is a square frame structure; multiple sets of support rods are arranged in parallel, with their two ends fixedly connected to the inner side of the bottom frame; the connecting shafts are fixedly arranged on both sides of the bottom frame, and their diameter and length are adapted to the bottom rods of the frame.

[0013] Furthermore, the bottom rod, top rod, outer rod, and inner rod are solid cylindrical rods, all made of alloy steel.

[0014] Furthermore, the bottom support is made of a hollow round tube.

[0015] Furthermore, the support plate is made of acrylic sheet.

[0016] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0017] (1) The construction platform of this utility model is installed on the steel frame structure in the beam construction to realize the construction operation of the bridge lower baffle. It reasonably solves the problems of time-consuming and labor-intensive scaffolding construction and the inability of the beam erecting vehicle to work in special environments. Moreover, the structure is compact and easy to process. It is a general-purpose and convenient construction auxiliary device with promotion and application value in many environments with strict requirements for the working area.

[0018] (2) The construction platform of this utility model is made of alloy steel, which has high structural strength and can easily support construction workers to carry out construction work on the platform. The frame, connecting rod and protective plate form a protective structure, which effectively protects the personal safety of construction workers.

[0019] (3) The construction platform of this utility model has increased the support points by providing protective rods on the top side of the frame and connecting the frame and steel frame by limiting rings, which effectively ensures the stability of the construction platform and avoids shaking of the construction platform during operation.

[0020] (4) The construction platform of this utility model is equipped with protective sleeves on the top of the frame and protective rods, and an acrylic support plate is installed on the bottom frame to isolate the static electricity of the frame and avoid the static electricity from affecting the welding operation. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a prefabricated small box girder wet joint construction platform according to an embodiment of the present utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the construction platform in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the frame structure in an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the bottom support component in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the limiting ring in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the protective rod in an embodiment of this utility model.

[0027] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-frame, 101-bottom rod, 102-top rod, 103-outer rod, 104-inner rod, 2-ladder rod, 3-connecting rod, 4-bottom support, 401-bottom frame, 402-support rod, 403-connecting shaft rod, 5-limiting ring, 501-tension spring, 502-pull hook, 503-protective layer, 6-protective rod, 7-support plate, 8-protective plate Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figure 1-6As shown, this utility model provides a construction platform for wet joints of precast small box girders, including a frame 1, ladder rods 2, connecting rods 3, bottom support 4, limiting rings 5, and support plates 7. The frame 1 consists of two sets of rectangular frames arranged vertically, with the bottom rotatably connected to the sides of the bottom support 4, and the top suspended from the steel frame structure used in bridge construction. Multiple sets of ladder rods 2 are arranged parallel within the frame 1, forming a ladder-like structure for workers to climb into and out of the construction platform. The bottom support 4 provides foot support for workers, including a bottom frame 401 and support rods 402 fixedly connected to the inner sides of the bottom frame 401 at both ends. A support plate 7 is located on top of the bottom support 4 for workers to step on. A connecting rod 3 is located on the side of the frame 1, connecting the two sets of frames 1 together to form a stable enclosure structure for the construction platform, blocking workers and ensuring their safety. The limiting ring 5 includes a tension spring 501 and hooks 502 at both ends of the tension spring 501, which limit the connection between the top of the frame 1 and the steel frame structure, preventing the construction platform from swaying during construction. The construction platform of this utility model has a simple structure, is easy to set up, and has low production cost. It can be used in the auxiliary construction environment of gaps between precast bridges. The construction platform is easy to operate and saves manpower, and has high promotion value.

[0030] like Figure 1-3 As shown, the frame 1 is a rectangular structure, including a bottom rod 101, a top rod 102, an outer rod 103, and an inner rod 104, which are connected end to end in sequence. Furthermore, the bottom rod 101, top rod 102, outer rod 103, and inner rod 104 are solid cylindrical rods made of alloy steel, ensuring structural strength and providing support for safe operation of workers. Preferably, the frame 1 has first rounded chamfers at its four corners, which effectively enhances structural stability and improves load-bearing capacity. Further, the frame 1 is 2000mm long, 750mm wide, and has a rectangular frame with 30mm radius rounded corners, consisting of solid cylindrical rods with a 14mm cross-section.

[0031] The ladder rods 2 are arranged in multiple sets parallel to each other between the outer rods 103 and the inner rods 104, with their two ends fixedly connected to the outer rods 103 and the inner rods 104 respectively. Furthermore, the ladder rods 2 installed inside the frame 1 are spaced 320mm apart at each level, with a width of 750mm and a diameter of 14mm, and are hollow cylindrical rods made of alloy steel.

[0032] The frame 1 of this invention mainly has five layers of ladders 2 welded inside, which facilitates construction personnel to reach the bottom for construction work. The frame 1 is mainly made of solid alloy steel with a diameter of 14mm, which can be calculated using the following formula:

[0033] In this context: F represents the tensile force; r represents the radius of the steel; and represents the tensile strength of the steel.

[0034] Calculations show that frame 1 has a load-bearing capacity exceeding 30 kN, enough to support the weight of 20 adult men. However, considering actual working conditions, it is sufficient for two people to perform construction work on the construction auxiliary equipment.

[0035] The rounded corners of the frame 1 facilitate installation in the construction area and make it easier to carry and transport in complex environments. Ladders 2 are welded inside both sides of the frame, allowing construction workers to easily access the bottom for work. In this design, as long as the number and arrangement of the ladders 2 form a symmetrical structure with respect to the frame 1, they fall within the scope of protection of this patent.

[0036] The connecting rod 3 is used to connect and limit the two sets of frame bodies 1. It is a rod-shaped structure with buckles at both ends. These buckles are C-shaped and their specifications are compatible with the ladder rods 2. During installation and use, the buckles at both ends of the connecting rod 3 are respectively engaged with the ladder rods 2 of the corresponding number of layers to form a protective structure and prevent workers from falling. The length of the connecting rod 3 is compatible with the width of the bottom support 4. Furthermore, the main body of the connecting rod 3 is 750mm long and is made of hollow aluminum tubing, with buckles at both ends.

[0037] like Figure 4 As shown, the bottom support 4 includes a bottom frame 401, support rods 402, and connecting shafts 403. The bottom frame 401 is a square frame structure. Multiple sets of support rods 402 are arranged in parallel, with their ends fixedly connected to the inner side of the bottom frame 401. The connecting shafts 403 are fixedly located on both sides of the bottom frame 401. Further, the bottom frame 401 is 750mm long and 750mm wide, with second rounded chamfers at its four corners, each with a radius of 30mm. The bottom frame 401, support rods 402, and support rods 402 are hollow round tubes with a cross-section of 14mm. The connecting shafts 403 are hollow round tubes, with their sides fixedly connected to both sides of the bottom frame 401 by welding. Their diameter and length are adapted to the bottom rod 101 of the frame 1. After passing through the connecting shafts 403, the bottom rod 101 can rotate around the connecting shafts 403, facilitating later folding and storage.

[0038] The support plate 7 is sized to match the bottom support 4 and is fixedly mounted on the top of the bottom support 4. Furthermore, the support plate 7 is made of acrylic sheet, which is strong and lightweight. Furthermore, the support plate 7 is a rectangular plate with a length of 750mm, a width of 750mm, and a thickness of 15mm, and has a third rounded chamfer with a radius of 30mm at its four corners. Furthermore, the bottom of the support plate 7 is provided with a buckle, which is used to fix it to the support rod 402.

[0039] Preferably, the support plate 7 is also provided with a protective plate 8 around it, which is snapped to the lower end of the frame 1 by a buckle, forming a enclosure above the bottom support 4 to prevent the workers' feet from slipping out of the platform range; preferably, the protective plate 8 is made of iron sheet.

[0040] To prevent swaying when the top of the frame 1 is suspended from the steel structure, a protective rod 6 is fixedly installed on the top side of the frame 1. This U-shaped rod has both ends fixedly connected to the outer side of the top rod 102, providing another support point for the frame 1 and preventing swaying of the construction platform during operation. Furthermore, to prevent wear on the frame 1 and the protective rod 6, a protective sleeve is fitted onto the top of the frame 1 and the protective rod 6. This protective sleeve is made of wear-resistant rubber material, providing wear protection and cushioning to effectively prevent swaying of the construction platform during operation. Preferably, the surface of the protective sleeve has anti-slip textures to improve the safety of structural connections during installation.

[0041] The limiting ring 5 connects the frame 1 and the steel frame structure. It includes a tension spring 501 and hooks 502 fixed at both ends of the tension spring 501. One set of hooks 502 is connected to one side of the protective rod 6, and the other set of hooks 502 is hung on the steel frame structure to prevent the construction platform from shaking during operation.

[0042] When installing the construction platform of this utility model, the frame 1, which is folded at the top and bottom of the bottom support 4, is rotated and opened so that the two sets of frame 1 are perpendicular to both sides of the bottom support 4. Multiple sets of connecting rods 3 are used to connect the two sets of frame 1 to keep the construction platform stable. Support plates 7 are snapped onto the bottom support 4 and protective plates 8 are snapped onto the lower end of the frame 1, thus forming a enclosure above the bottom support 4. The tops of the two sets of frame 1 are sequentially suspended on the steel frame structure in the bridge construction, and the steel frame structure is connected by limiting rings 5 ​​for buffering the load. After the installation is completed, the workers can climb down from the ladder 2 to enter the construction platform to carry out the subsequent welding and painting work of the bridge lower baffle. After the work is completed, the workers climb out of the construction platform from the frame 1, remove the limiting rings 5, take out the construction platform, and sequentially remove the support plates 7, protective plates 8 and connecting rods 3. The two sets of frame 1 are rotated and folded to the top and bottom of the bottom support 4 to complete the dismantling of the construction platform.

[0043] This utility model's construction platform, installed on the steel frame structure during beam construction, enables the construction of the bridge's lower retaining plate. It effectively solves the problems of time-consuming and labor-intensive scaffolding erection and the inability of beam-erecting vehicles to operate in special environments. Furthermore, its compact structural design and ease of fabrication make it a versatile and convenient construction auxiliary device with significant application value in environments with strict requirements for working area.

[0044] The construction platform of this utility model is made of alloy steel, with high structural strength, which can easily support construction workers to carry out construction work on the platform. The frame 1, connecting rod 3 and protective plate form a protective structure, which effectively protects the personal safety of construction workers.

[0045] The construction platform of this utility model has a protective rod 6 on the top side of the frame 1 to increase the support points, and a limiting ring 5 to connect the frame 1 and the steel frame, which effectively ensures the stability of the construction platform and avoids shaking of the construction platform during operation.

[0046] The construction platform of this utility model has protective sleeves on the top of the frame 1 and the protective rods 6, and an acrylic support plate 7 is installed on the bottom frame 401 to isolate the static electricity of the frame 1 and avoid the static electricity from affecting the welding operation.

[0047] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A construction platform for wet joints of precast small box girders, characterized in that, include: A bottom support (4) that provides foot support for workers, with a support plate (7) on top. The frame (1) is rotatably connected to both sides of the bottom support (4), and multiple sets of ladder rods (2) are provided in parallel inside to form a ladder structure for workers to climb in and out of the construction platform; the top of the frame (1) is suspended on the steel frame structure in the bridge construction. Connecting rods (3) that are respectively connected to two sets of frames (1) on both sides; And a limiting ring (5) that limits the connection between the top of the frame (1) and the steel frame structure.

2. The precast small box girder wet joint construction platform according to claim 1, characterized in that, The top side of the frame (1) is also fixed with a protective rod (6), which is a U-shaped rod. The two ends of the rod are fixedly connected to the outer side of the top of the frame (1), thereby providing another support point for the frame (1).

3. The precast small box girder wet joint construction platform according to claim 2, characterized in that, The top of the frame (1) and the protective rod (6) are fitted with protective sleeves made of wear-resistant rubber material.

4. A precast small box girder wet joint construction platform according to any one of claims 1-3, characterized in that, The support plate (7) is also provided with a protective plate (8) around it, which is connected to the lower end of the frame (1) by a buckle, forming a enclosure above the bottom support member (4).

5. A precast small box girder wet joint construction platform according to any one of claims 1-3, characterized in that, The limiting ring (5) includes a tension spring (501) and hooks (502) fixed at both ends of the tension spring (501). One set of hooks (502) is connected to one side of the protective rod (6), and the other set of hooks (502) is hung on the steel frame structure.

6. A precast small box girder wet joint construction platform according to any one of claims 1-3, characterized in that, The frame (1) is a square frame structure, including a bottom rod (101), a top rod (102), an outer rod (103) and an inner rod (104), which are fixedly connected end to end to form a whole.

7. The precast small box girder wet joint construction platform according to claim 6, characterized in that, The bottom support (4) includes a bottom frame (401), support rods (402) and connecting shafts (403); wherein, the bottom frame (401) is a square frame structure; multiple sets of support rods (402) are arranged in parallel, and their two ends are fixedly connected to the inner side of the bottom frame (401); the connecting shafts (403) are fixed on both sides of the bottom frame (401), and their diameter and length are adapted to the bottom rods (101) of the frame (1).

8. A precast small box girder wet joint construction platform according to claim 6, characterized in that, The bottom rod (101), top rod (102), outer rod (103), and inner rod (104) are solid cylindrical rods, all made of alloy steel.

9. A precast small box girder wet joint construction platform according to claim 7, characterized in that, The bottom support (4) is made of a hollow round tube.

10. A construction platform for wet joints of precast small box girders according to any one of claims 1-3, characterized in that, The support plate (7) is made of acrylic sheet.

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