An operating platform with a precast beam diaphragm casting base plate

Abstract

This utility model proposes an operating platform with a casting base plate for precast beam diaphragms, belonging to the field of bridge engineering technology. It solves the problems of insufficient rigidity in casting molds assembled with wooden templates and tie bolts, leading to diaphragm collapse, insufficient concrete density, unstable lifting frame construction, and high construction costs. It includes a rectangular plate and multiple horizontal braces. The two ends of the rectangular plate are locking and fixing sections, and the middle section is the casting section. The casting section has multiple vertically oriented lifting and fixing through holes. The multiple horizontal braces are parallel to each other and located in the same horizontal plane, fixedly connected to the casting section. The length direction of the multiple horizontal braces is perpendicular to the long side direction of the rectangular plate. The upper surface of the locking and fixing section contacts the bottom surfaces of the precast beams on both sides. It is mainly used for the casting construction of precast beam diaphragms.

Description

Technical Field

[0001] This utility model belongs to the field of bridge engineering technology, and in particular relates to an operating platform with a precast beam diaphragm casting base plate. Background Technology

[0002] Diaphragms are structural members installed between precast beams to maintain cross-sectional shape and enhance lateral stiffness. Diaphragms located at the ends of bridges are called end diaphragms, and those located in the middle are called center diaphragms. In actual construction, the construction of precast beam center diaphragms mainly uses wooden formwork and tie bolts to assemble casting molds, which are then used in conjunction with lifting frames.

[0003] The rigidity of the casting mold structure formed by the combination of wooden formwork and tie bolts is relatively low. During construction, the bottom formwork is prone to bending deformation under stress, leading to sagging of the central partition after casting, resulting in non-straight lines and affecting the dimensional accuracy of the structure. Furthermore, the insufficient rigidity of the casting mold structure makes it difficult to accurately control the vibration intensity and range, easily causing under-vibration at chamfered areas, resulting in insufficient concrete density and quality defects such as grout leakage and honeycomb surface defects. After construction, bolt holes remain on the surface of the component after the tie bolts are removed. If the bolt holes on the bottom of the component are not properly sealed, they may fall off, posing a risk of falling from a height and affecting the overall strength of the component structure. The unstable construction of the suspended frame, prone to swaying, increases construction difficulty and reduces efficiency. Moreover, wooden formwork has a limited number of reuses, resulting in high material consumption and construction costs, which does not meet the requirements of green construction and economic efficiency. Utility Model Content

[0004] In view of this, to address the problems of insufficient rigidity in casting molds assembled with wooden templates and tie bolts, leading to diaphragm collapse, insufficient concrete density, unstable construction of the suspended frame, and high construction costs, this utility model proposes an operating platform with a base plate for casting precast beam diaphragms. The operating platform is fixed to the bridge deck by precision-threaded rods and suspended below the bridge deck. A rectangular plate is provided at the bottom of the operating platform, with both ends of the rectangular plate contacting the bottom surface of the precast beams. The middle section of the rectangular plate is located between the precast beams, and the internal area of ​​the middle section forms the base plate of the casting mold. The side templates are made using wooden templates and tie bolts according to construction needs. The side templates, together with the rectangular plate, can form casting molds of different specifications, thus the operating platform can be used for casting diaphragms of different specifications. The use of threaded rods to fix the operating platform ensures stability and reliability, and the strip-shaped rectangular platform, as the base plate of the casting mold, enhances the structural rigidity of the casting mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an operating platform with a precast beam diaphragm casting base plate, comprising a rectangular plate and multiple horizontal bracing rods, wherein the two ends of the rectangular plate are locking and fixing sections, and the middle section is a casting section, wherein the casting section has multiple hoisting and fixing through holes in the vertical direction, the multiple horizontal bracing rods are parallel to each other and located in the same horizontal plane and are fixedly connected to the casting section, the length direction of the multiple horizontal bracing rods is perpendicular to the long side direction of the rectangular plate, and the upper surface of the locking and fixing section is in contact with the bottom surface of the precast beams on both sides respectively.

[0006] Furthermore, it also includes a pair of guardrails, which are symmetrically arranged on the horizontal support rods on both sides of the pouring section, with the bottom of the guardrails fixedly connected to the horizontal support rods.

[0007] Furthermore, the hoisting and fixing through holes are four in number, arranged in a rectangular shape at the four corners.

[0008] Furthermore, the rectangular plate is a steel plate.

[0009] Furthermore, the cross brace is made of square steel.

[0010] Furthermore, the guardrail is in the shape of an isosceles trapezoid and is formed by assembling and fixing square steel.

[0011] Compared with the prior art, the beneficial effects of the operating platform with precast beam diaphragm casting base plate described in this utility model are:

[0012] 1. The operating platform of this utility model is fixed to the bridge deck at the construction site using a precision-rolled threaded rod. No hanging frame is required during the pouring of the diaphragm. The operating platform is easy to install and stable, and the construction process is safe and efficient.

[0013] 2. The operating table of this utility model is provided with a rectangular plate. The middle area of ​​the rectangular plate serves as the base plate of the casting mold. The operating table is firmly fixed. The rectangular plate as the base plate of the casting mold improves the overall rigidity of the mold. After molding, the mold is straight and there is no sagging. In addition, there are no tie bolt holes for fixing the wooden base plate of the casting mold on the bottom surface of the partition plate. This avoids the risk of falling and hitting the car caused by improper sealing of the bolt holes and improves the finished quality of the partition plate.

[0014] 3. The rectangular plate of this utility model includes a clamping and fixing section and a casting section. The clamping and fixing section contacts the bottom surface of the precast beam and forms a symmetrical force-bearing surface with the bridge deck for fixing the operating platform. The side templates of the casting mold are assembled from wooden templates and tie bolts, and the side templates then form a complete casting mold with the casting section of this utility model. Depending on the specifications of the precast beams, side templates of different sizes can be assembled and combined with the casting section of this utility model. Therefore, this utility model can be applied to the casting construction of diaphragm plates of various specifications of precast beams, and can be reused, saving construction costs. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0016] Figure 1 This is a schematic diagram of the main structure of the operating platform with a precast beam diaphragm casting base plate according to the present invention;

[0017] Figure 2 This is a top view of an operating platform with a precast beam diaphragm casting base plate according to the present invention.

[0018] Figure 3 This is a front view of an operating platform with a precast beam diaphragm casting base plate according to the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the operating platform with a precast beam diaphragm casting base plate that is fixed to the bridge deck during construction, as described in this utility model.

[0020] Figure 5 This utility model Figure 4 A sectional view along line A in the middle;

[0021] In the diagram: 1-Rectangular plate; 2-Horizontal brace; 11-Clip and fixing section; 12-Pouring section; 13-Lifting and fixing through hole; 3-Guardrail; 4-Precast beam; 5-Lifting and fixing steel support; 6-Precision rolled threaded rod; 7-Side formwork; 8-Middle partition. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0023] I. Detailed Implementation Method 1, see [link / reference] Figure 1-5 This embodiment describes an operating platform with a precast beam diaphragm casting base, comprising a rectangular plate 1 and multiple horizontal support rods 2. The rectangular plate 1 has locking and fixing sections 11 at both ends and a casting section 12 in the middle. The casting section 12 has multiple vertically oriented hoisting and fixing through holes 13. The multiple horizontal support rods 2 are parallel to each other and located in the same horizontal plane, fixedly connected to the casting section 12. The length direction of the multiple horizontal support rods 2 is perpendicular to the long side direction of the rectangular plate 1. The upper surface of the locking and fixing section 11 contacts the bottom surfaces of the precast beams on both sides for fixing. Wooden planks are laid on the surface of the horizontal support rods 2 to form a planar area for workers to stand and move around.

[0024] It also includes a pair of guardrails 3, which are symmetrically arranged on the horizontal support rods 2 on both sides of the pouring section 12, and the bottom of the guardrails 3 is fixedly connected to the horizontal support rods 2.

[0025] The hoisting and fixing through holes 13 are four in number, arranged in a rectangular shape at the four corners.

[0026] The rectangular plate 1 is a steel plate, and a steel plate with a thickness of 5mm is provided.

[0027] The cross brace 2 is made of square steel, with a specification of 80mm or 50mm. Its length extends 800mm outward from both sides of the casting section 12.

[0028] The guardrail 3 is an isosceles trapezoid in shape and is formed by assembling and fixing square steel. The height of guardrail 3 is 1200mm. The shape of the isosceles trapezoid matches the shape of the gap between adjacent precast beams, effectively forming a protective surface.

[0029] The working principle of this utility model is as follows: An operating platform structure is designed to replace the traditional suspended frame operation. The operating platform is fixed to the bridge deck to form a stable and reliable working area, ensuring a safe and efficient operation. Simultaneously, the operating platform is equipped with a pouring section 12, which serves as the base plate for the pouring mold, enhancing the overall strength of the mold and improving the overall quality of the diaphragm after construction. The pouring section 12, as the mold base plate, can be combined with wooden side templates of different specifications to form pouring molds of various sizes. This utility model's operating platform can be reused in the construction process of diaphragms of different sizes, reducing construction costs, minimizing wood consumption, and promoting low-carbon and environmentally friendly practices.

[0030] Construction process of this utility model: Refer to the appendix. Figure 4 and Figure 5 First, select a suitable length of threaded rod 6 based on the height of the precast beam on site. After fixing one end of the four threaded rods 6 to the operating platform through the hoisting fixing through hole 13 on the ground, use nuts to fix them. Then, lay wooden boards on the cross brace 2 to form a standing area for workers. Next, use a winch to hoist the operating platform into place. Fix the other end of the threaded rod 6 to the hoisting fixing steel support 5 on the bridge deck with nuts. The two ends of the rectangular plate are locked and fixed with the bottom surface of the precast beam 4 on both sides, forming a symmetrical force-bearing surface on both sides of the threaded rod 6 with the hoisting fixing steel support 5 to achieve the hoisting and fixing of the operating platform. After reinforcement, workers descend to the work platform through the wet joint, grind the surface of the pouring section 12 and apply release agent, assemble the side formwork 7, and submit the side formwork 7 for inspection. After successful inspection, the diaphragm 8 is poured. After the concrete reaches the required strength, the side formwork 7 is removed first, and then the fixed ends of the threaded rod 6 and the hoisting and fixing steel support 5 on the bridge deck are loosened. The work platform is then released to the ground using a winch, completing the diaphragm construction work of the precast beam.

[0031] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. An operating platform with a precast beam diaphragm casting base plate, characterized in that: The rectangular plate (1) includes a rectangular plate (1) and multiple horizontal bracing rods (2). The rectangular plate (1) has two end areas as locking and fixing sections (11) and a middle area as a casting section (12). The casting section (12) has multiple hoisting and fixing through holes (13) in the vertical direction. The multiple horizontal bracing rods (2) are parallel to each other and located in the same horizontal plane and are fixedly connected to the casting section (12). The length direction of the multiple horizontal bracing rods (2) is perpendicular to the long side direction of the rectangular plate (1). The upper surface of the locking and fixing section (11) is in contact with the bottom surface of the precast beams on both sides.

2. The operating platform with a precast beam diaphragm casting base plate according to claim 1, characterized in that: It also includes a pair of guardrails (3), which are symmetrically arranged on the horizontal support rods (2) on both sides of the pouring section (12), and the bottom of the guardrails (3) is fixedly connected to the horizontal support rods (2).

3. The operating platform with a precast beam diaphragm casting base plate according to claim 1, characterized in that: There are four hoisting and fixing through holes (13), arranged in a rectangular shape at the four corners.

4. The operating platform with a precast beam diaphragm casting base plate according to claim 1, characterized in that: The rectangular plate (1) is a steel plate.

5. The operating platform with a precast beam diaphragm casting base plate according to claim 1, characterized in that: The cross brace (2) is made of square steel.

6. The operating platform with a precast beam diaphragm casting base plate according to claim 2, characterized in that: The guardrail (3) is an isosceles trapezoid and is formed by assembling and fixing square steel.

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