A deck plate structure for a bent cap operation platform

Abstract

This utility model discloses a flip-up structure for a cap beam operating platform, including a clamp assembly, a beam frame, a protective fence, and step plate modules. The beam frame is installed on the pier via the clamp assembly, the step plate modules are laid on the beam frame, and the protective fence is installed around the perimeter of the beam frame. The advantages of this utility model are: the step plate unfolds horizontally, providing an expanded working surface; it is locked by quick-release buckles; the step plate closes at an angle, relying on gravity and elastic sealing strips to press the cap beam side mold, forming a self-locking protective surface; the hinge mechanism limits the flipping angle to 60°-75°, ensuring center of gravity stability; the step plate and fence use standardized interfaces, connected by buckles or pins, requiring no welding or special tools; the load-bearing main beam is equipped with an adaptive leveling device that automatically adapts to the cap beam's cross slope; and high-compression rubber strips are installed at the bottom of the step plate to compensate for template installation errors, ensuring complete sealing of gaps.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction safety protection technology, and in particular to a flap structure for a cap beam operation platform. Background Technology

[0002] Traditional cap beam construction platforms generally suffer from significant safety hazards, low efficiency, poor adaptability, and insufficient economic benefits: the sealing rate of gaps in temporary structures such as wooden planks and scaffolding is less than 60%, resulting in a high risk of falling objects from heights; manual disassembly and assembly leads to a single mode switch taking ≥30 minutes, seriously delaying the construction period; fixed designs are difficult to adapt to curved and large-span cap beams, and customized modifications are required for complex working conditions, leading to a surge in costs; the material reuse rate is ≤5 times, and the cost of protective facilities accounts for more than 30%.

[0003] Therefore, it is necessary to propose a flip-plate structure for the girder operation platform to address the above-mentioned problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flap structure for the cap beam operation platform to solve the above problems.

[0005] A flip-up structure for a girder operation platform includes a clamp assembly, a beam frame, a protective fence, and a step plate module. The beam frame is installed on the pier via the clamp assembly, the step plate module is laid on the beam frame, and the protective fence is installed around the perimeter of the beam frame.

[0006] Preferably, the clamp assembly includes two sets of clamps and sand cylinders, with the two sets of sand cylinders respectively installed on their respective clamps, and the contact surface between the clamps and the pier column is provided with a high friction coefficient pad.

[0007] Preferably, the beam frame includes a main beam and a distribution beam, with the distribution beam mounted on the main beam.

[0008] Preferably, the main beam is installed on the sand cylinder, and the two main beams are locked together by a fixing tie rod.

[0009] Preferably, the step plate module is assembled from several step plates, and two step plates are hinged together by a hinge mechanism. The bottom edge is provided with an elastic sealing strip, and the compression deformation of the sealing strip is not less than 5mm, so as to compensate for template installation errors.

[0010] Preferably, the step plate is made of patterned steel plate, and the hinge mechanism is provided with an angle limiting structure to limit the step plate's rotation angle range to 60°-75°.

[0011] Preferably, the lower part of the protective fence is provided with a kickboard, and the protective fence is assembled from square tubes and round tubes, and can be quickly assembled with the step plate module through snap-on connectors; the crossbar integrates tool hanging slots and warning sign installation positions.

[0012] Compared with the prior art, the advantages of this utility model are as follows: the step plate unfolds horizontally, providing an expanded working surface; it is locked by quick snap-fit, and the step plate closes at an angle, relying on gravity and elastic sealing strips to press the side mold of the cap beam, forming a self-locking protective surface; the hinge limiting structure limits the flipping angle to 60°-75°, ensuring the stability of the center of gravity; the step plate and the surrounding rod both adopt standardized interfaces, connected by snap-fit ​​or pins, without the need for welding or special tools; the load-bearing main beam is equipped with an adaptive leveling device, which automatically adapts to the cross slope of the cap beam; the bottom of the step plate is equipped with a high-compression rubber strip to compensate for template installation errors (±15mm) and ensure that the gaps are fully sealed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the clamp assembly of this utility model;

[0015] Figure 3 This is a structural diagram of the beam frame of this utility model;

[0016] Figures 4 to 6 This is a structural diagram of the protective enclosure of this utility model;

[0017] Figure 7 and Figure 8 This is a structural diagram of the step plate module of this utility model.

[0018] The attached diagram is labeled as follows: 1. Clamp assembly; 2. Beam frame; 3. Protective fence; 4. Step plate module; 5. Pier column; 6. Clamp; 7. Sand cylinder; 8. Liner; 9. Main beam; 10. Distribution beam; 11. Fixed tie rod; 12. Step plate; 13. Hinge mechanism; 14. Kickboard; 15. Square tube; 16. Round tube. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0023] like Figure 1 and combined Figures 2 to 8 As shown, a flip-up structure for a girder operation platform includes a clamp assembly 1, a beam frame 2, a protective fence 3, and step plate modules 4. The beam frame 2 is installed on the pier through the clamp assembly 1, the step plate modules 4 are laid on the beam frame 2, and the protective fence 3 is installed around the perimeter of the beam frame 2.

[0024] Furthermore, the clamp assembly 1 includes two sets of clamps 6 and sand cylinders 7. The two sets of sand cylinders 7 are respectively installed on their respective clamps 6. The contact surface between the clamps 6 and the pier column 7 is provided with a pad with a high coefficient of friction, and the static friction coefficient of the pad 8 is ≥0.6.

[0025] Furthermore, the beam frame 2 includes a main beam 9 and a distribution beam 10, with the distribution beam 10 mounted on the main beam 9. An adaptive leveling device is provided between the main beam 9 and the distribution beam 10, which can automatically adjust the platform's levelness according to the cross slope of the cap beam.

[0026] Furthermore, the main beam 9 is installed on the sand cylinder 7, and the two main beams 9 are locked together by a fixing tie rod 11.

[0027] Furthermore, the step plate module 4 is assembled from several step plates 12. Two step plates 12 are hinged together by a hinge mechanism 13. The bottom edge of the step plate 12 is provided with an elastic sealing strip. The compression deformation of the sealing strip is not less than 5mm to compensate for the installation error of the step plate. It supports the horizontal splicing of multiple modules, and the maximum splicing width is not less than 3m.

[0028] Furthermore, the step plate 12 is made of patterned steel plate, and the hinge mechanism is equipped with an angle limiting structure to limit the step plate's rotation angle range to 60°-75°.

[0029] Furthermore, the lower part of the protective fence 3 is provided with a kick plate 14. The protective fence 3 is assembled from square tubes 15 and round tubes 16 and can be quickly assembled with the step plate module through snap-fit ​​connectors. The crossbar integrates tool hanging slots and warning sign installation positions.

[0030] Compared with the prior art, the advantages of this utility model are as follows: the step plate 12 unfolds horizontally, providing an expanded working surface. It is locked by quick snap-fit, and the step plate closes at an angle. It relies on gravity and elastic sealing strips to press the side mold of the cap beam, forming a self-locking protective surface. The limiting structure of the hinge mechanism 13 limits the flipping angle to 60°-75° to ensure the stability of the center of gravity. The step plate and the surrounding rod adopt standardized interfaces and are connected by snap-fit ​​or pins, without the need for welding or special tools. The load-bearing main beam is equipped with an adaptive leveling device to automatically adapt to the cross slope of the cap beam. The bottom of the step plate is equipped with a high-compression rubber strip to compensate for the template installation error (±15mm) and ensure that the gap is fully sealed.

[0031] Install clamp assembly 1 and erect the main beam and distribution beam; horizontally lock step plate module 4 to the distribution beam to form an extended working surface; after the reinforcement is tied, release the lock and flip the step plate to the protective state; install the protective fence assembly to form a closed protective space; after construction is completed, reverse the operation to disassemble and transport.

[0032] The specific steps are as follows:

[0033] I. Construction Preparation Stage

[0034] Measurement and layout: Use a total station to locate the center line of the pier column and determine the installation elevation of the clamp 6 (error ≤ ±2mm); mark the position of the cantilever end of the main beam 9 to ensure that the symmetry deviation is ≤ 5mm.

[0035] Material acceptance: Inspect the dimensions and weld quality of components such as modular step plate 12, main beam 9, and clamp 6; verify the compression rate of rubber sealing strip (≥30%) and bolt preload (≥50kN).

[0036] II. Installation of the load-bearing system

[0037] Fixing with clamps: Install the clamps symmetrically at the design elevation of the pier column, with rubber pads (friction coefficient ≥0.6) inside; use a torque wrench to tighten the high-strength bolts in three stages (final tightening torque value 300 N·m), with a preload force ≥50 kN.

[0038] Main beam erection: hoist the No. 50 I-beam main beam to the top of the clamp, and adjust the levelness error to ≤3mm / m; install diagonal bracing (∠50×5 angle steel) at the cantilever end of the main beam and weld it in place (weld height ≥6mm).

[0039] Distribution beam installation: Lay 16# channel steel distribution beams along the bridge direction with a spacing of ≤800mm; use M16 saddle bolts to connect the main beam and the distribution beams with a tightening torque of 80N·m.

[0040] III. Installation of Operating Platform Modules

[0041] Step plate assembly: Place the step plate module (410mm×2000mm) horizontally on the distribution beam and align the positioning holes; insert the quick clips (tensile strength ≥8kN), and the installation time for a single step plate is ≤1 minute.

[0042] Lateral expansion: Adjacent steps are spliced ​​laterally using pin connectors (Φ12mm), with a maximum splicing width of 3m; check that the splicing gap is ≤2mm and ensure that the flatness error of the working surface is ≤5mm.

[0043] IV. Protection System Assembly

[0044] Installation of the fence: Insert the 40×40×3mm square tube uprights into the pre-embedded sleeves at the edge of the step plate, with an insertion depth of ≥50mm; install two Φ20mm round steel crossbars (spaced 370mm apart) and lock them in place with U-shaped clips (shear strength ≥3kN).

[0045] Hanging the fall arrest net: Hang the nylon fall arrest net (mesh size ≤ 50mm) on the hook inside the fence; tighten the net edges with a tensioner, with a sag of ≤ 100mm.

[0046] V. Self-locking test and debugging

[0047] Mode switching test: Release the step plate buckle, manually rotate it to 60°-75°, and check that the compression of the EPDM rubber strip is ≥5mm; apply a horizontal thrust of 1.0kN / m, and the displacement is ≤1mm to be qualified.

[0048] Stability verification: 800 kg / m² (full load) 2 After being left to stand for 24 hours, the deflection was ≤L / 300 (L is the span of the step plate); the structure showed no loosening or abnormal noise during the vibration test simulating a level 8 wind (20m / s).

[0049] VI. Disassembly and Relocation

[0050] Reverse operation: Remove the fall protection net → Unfasten the pole clips → Pull out the step plate pins → Lift off the main beam and clamps; Disassembly time for a single-span platform is ≤30 minutes (traditional ≥2 hours).

[0051] Module maintenance: Check hinge wear (<0.1mm / 50 times) and rubber strip rebound rate (≥85%); damaged parts are returned to the factory for repair, and qualified modules are packed and transported to the next workstation.

[0052] Application in the construction of cap beams for a certain bridge project

[0053] (I) Project Overview

[0054] The left span pier #3 at kilometer marker K12+300 of a highway bridge has a diameter of 1.5m, a cap beam with a designed cross slope of 3%, a length of 15m, a width of 2m, and a height of 1.8m. This utility model utilizes a cap beam operating platform with a flip-plate structure. Each platform covers an operating length of 6m, requiring a total of 3 platforms to be spliced ​​together.

[0055] (II) Key Construction Steps

[0056] For the installation of the clamp assembly, a clamp with an inner diameter of 1.52m (with a 2mm installation gap) is selected, and a modified rubber liner with a static friction coefficient of 0.7 is used. The height of the sand cylinder is adjusted to 300mm. The clamp bolts are tightened to the design torque of 200N·m using a torque wrench. After anti-slip testing, the static friction force of the clamp reaches 50kN, which meets the load-bearing requirements of the platform (design load 2.5kN / ㎡).

[0057] Adaptive leveling operation

[0058] During the installation of the main beam, the 3% cross slope of the cap beam is converted into a platform base inclination angle of 1.72°. The adaptive leveling device (hydraulic leveling cylinder) is activated. Through the feedback signal from the displacement sensor, the height difference between the sand cylinders at both ends of the main beam is automatically adjusted to 90mm, so that the horizontal error of the top surface of the distribution beam is ≤3mm, ensuring that the base surface for the step slab paving is flat.

[0059] Step panel module splicing and protection

[0060] Each step plate measures 3m x 1.2m, and five plates are spliced ​​together to form a 6m x 3m working surface. The hinge mechanism has a limiting angle of 70°. After flipping, the gap between the edge of the step plate and the side formwork of the cover beam is 10mm. The elastic sealing strip is compressed by 10mm (design value 5mm), completely covering the template installation error (±15mm) and forming a sealed protective surface.

[0061] Safety protection effect

[0062] The protective fence posts are spaced 1.5m apart, and the horizontal bars are arranged in two layers (1.2m and 0.6m in height). The tool hanging slots have a load-bearing capacity of 15kg / slot and can hang a total of 8 tools such as welding machines and wrenches. The warning signs are made of reflective material and are visible at night at a distance of ≥50m. No safety accidents occurred during the construction period.

[0063] (III) Comparison of construction efficiency

[0064] Compared with traditional steel pipe scaffolding platforms, the installation time of this utility model platform is reduced by 40% (6 hours vs. 10 hours), the disassembly time is reduced by 50% (1.5 hours vs. 3 hours), the step plate flipping protection operation only takes 20 minutes, and no welding work is required, reducing the fire safety hazards and resulting in significant economic benefits.

[0065] (iv) Quality Acceptance

[0066] During the concrete pouring process of the cap beam, the settlement of the monitoring platform was ≤5mm, there was no leakage of grout at the sealing point of the step plate, the appearance quality of the concrete was excellent, and according to third-party testing, the anti-slip coefficient of the clamps was 0.65, which met the design requirements. The project quality was rated as qualified.

[0067] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A bent cap operations platform flipper configuration, characterized by: It includes a clamp assembly (1), a beam frame (2), a protective fence (3) and a step plate module (4). The beam frame (2) is installed on the pier (5) by the clamp assembly (1). The step plate module (4) is laid on the beam frame (2). The protective fence (3) is installed around the beam frame (2).

2. A bent cap operations platform flap configuration as claimed in claim 1, characterized in that: The clamp assembly (1) includes two sets of clamps (6) and sand cylinders (7). The two sets of sand cylinders (7) are respectively installed on their respective clamps (6). The contact surface between the clamps (6) and the pier (5) is provided with a pad (8) with a high coefficient of friction. The static friction coefficient of the pad (8) is ≥0.

6.

3. A bent cap operations platform flap configuration as claimed in claim 1, characterized in that: The beam frame (2) includes a main beam (9) and a distribution beam (10), with the distribution beam (10) built on the main beam (9).

4. A bent cap operations platform flap configuration as claimed in claim 3, characterised in that: The main beam (9) is installed on the sand cylinder (7), and the two main beams (9) are locked together by a fixing rod (11).

5. A bent cap operations platform flap configuration as claimed in claim 1, characterized by: The step plate module (4) is assembled from several step plates (12). Two step plates (12) are hinged together by a hinge mechanism (13). The bottom edge of the step plate (12) is provided with an elastic sealing strip.

6. A bent cap operations platform flap configuration as claimed in claim 5, characterised in that: The step plate (12) is made of patterned steel plate, and the hinge mechanism (13) is equipped with an angle limiting structure to limit the step plate to a rotation angle range of 60°-75°.

7. A bent cap operations platform flap configuration as claimed in claim 1, characterized by: The protective fence (3) is equipped with a kickboard (14) at the bottom. The protective fence (3) is assembled from square tubes (15) and round tubes (16).

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