A platform for integral assembly of segmental arch ribs in upper-bearing steel-concrete composite arch bridges

Abstract

This invention provides a platform for the overall assembly of segmental arch ribs in a steel-concrete composite arch bridge, belonging to the field of steel-concrete composite arch bridge construction technology. This invention involves erecting an arch rib assembly platform on a hardened ground surface. In the platform structure, the bottom support is connected to the vertical support, which in turn is connected to a positioning plate. The positioning plate is fixed to the ground by a set of elastic connectors. After the segmental arch ribs are hoisted onto the assembly platform, the central cross bracing is installed. This facilitates welding work on land, solving problems such as long hoisting time, high risk, and poor welding quality in the air for single arch ribs. It is suitable for the overall assembly of segmental arch ribs in steel-concrete composite arch bridges.

Description

Technical Field

[0001] This utility model belongs to the field of steel-concrete composite arch bridge construction technology, specifically relating to an integral assembly platform for segmental arch ribs of upper-bearing steel-concrete composite arch bridges. Background Technology

[0002] After the arch ribs of the upper-bearing steel-concrete composite arch bridge are transported to the site, they must be hoisted using a cable crane and then installed using inclined cable-stayed installation. Conventional single-span hoisting methods have disadvantages such as long construction periods, increased risks for workers performing welding in the air, and poorer welding quality. Therefore, the ease of construction and welding quality of the arch ribs need further improvement to enhance construction safety.

[0003] To address this issue, this utility model proposes an integral assembly platform for segmental arch ribs of upper-bearing steel-concrete composite arch bridges, which solves the problem of aerial welding of arch ribs. Utility Model Content

[0004] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide an integral assembly platform for the segmental arch ribs of the upper-bearing steel-concrete composite arch bridge, which can effectively avoid the risk of aerial welding by construction personnel, improve construction safety, shorten the construction period, and ensure the bridge alignment.

[0005] This utility model provides the following technical solution: a platform for the overall assembly of segmental arch ribs of an upper-bearing steel-concrete composite arch bridge, including a bottom support and a positioning plate. The positioning plate is fixed to the hardened ground by a set of elastic connectors. The bottom support is fixedly connected to the positioning plate by a set of vertical supports. A set of positioning steel plates is fixedly provided on the bottom support. The segmental arch ribs of the arch bridge are hoisted and placed on the bottom support and limited by the positioning steel plates.

[0006] Furthermore, the bottom support and the vertical support are welded together, and the lateral width of the bottom support is greater than the width of the overall arch rib.

[0007] Furthermore, both the bottom support and the vertical support are composed of a box-shaped cross section.

[0008] Furthermore, the positioning steel plate is vertically arranged on the upper surface of the bottom support, has a channel-shaped cross section, and is welded and fixed to the bottom support.

[0009] Furthermore, the vertical support is disposed on the lower end surface of the bottom support and is welded to the positioning plate.

[0010] Furthermore, the elastic connector is an expansion bolt.

[0011] Furthermore, the bottom support is provided with an auxiliary stabilizing structure, which includes a binding plate, a tension rod and a rope disposed on the side of the bottom support. One end of the rope is tied to the binding plate, and the other end is wrapped around the bottom column of the arch rib at least once and then tied to the binding plate via the tension rod.

[0012] Furthermore, the binding plate is provided with binding holes to facilitate binding the two ends of the rope.

[0013] By adopting the above-mentioned technology, the beneficial effects of this utility model compared with the prior art are as follows: 1) This utility model constructs an arch rib assembly platform on a hardened ground. In the assembly platform structure, the bottom support is connected to the vertical support, and the vertical support is connected to the positioning plate. The positioning plate is fixed to the ground by a set of elastic connectors. After the segmental arch rib is hoisted to the assembly platform, the middle cross brace is installed. This facilitates welding construction on land and solves the problems of long construction period, high risk, and poor welding quality in the air when hoisting a single arch rib. It is suitable for the overall assembly construction of segmental arch ribs of upper-bearing steel pipe concrete arch bridges. 2) The main body of this utility model platform is assembled into a whole by assembling components and erected on a hardened ground with elastic connectors. It has the characteristics of easy disassembly, which effectively reduces the construction period and reduces the risk of aerial welding by construction personnel. Attached Figure Description

[0014] Figure 1 This is a front view schematic diagram of the assembly platform of this utility model (without auxiliary stabilizing structure); Figure 2 This is a front view schematic diagram of the auxiliary stabilizing structure of this utility model; Figure 3 This is a three-dimensional schematic diagram of the auxiliary stabilizing structure of this utility model. Detailed Implementation

[0015] 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 merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0016] Conversely, this utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model as defined in the claims. Furthermore, to provide the public with a better understanding of this utility model, certain specific details are described in detail in the following description. However, those skilled in the art will fully understand this utility model even without these detailed descriptions. Example

[0017] See Figure 1-3As shown, a platform for assembling segmental arch ribs of an upper-bearing steel-concrete composite arch bridge is provided. The platform includes a bottom support 1, a positioning steel plate 2, a vertical support 3, a positioning plate 4, and elastic connectors 5. The bottom support 1 is connected to the vertical support 3, and the vertical support 3 is connected to the positioning plate 4. The positioning plate 4 is fixed to the ground 6 by a set of elastic connectors 5. The positioning steel plate 2 is fixed to the bottom support 1. After the segmental arch rib 7 is hoisted to the assembly platform, the middle cross brace 10 is hoisted and installed and welded.

[0018] Specifically, the bottom support 1 and the vertical support 3 are welded together, and the horizontal width of the bottom support 1 is 1m wider than the width of the overall arch rib 7.

[0019] Specifically, the vertical support 3 is set on the lower end surface of the bottom support 1 and welded to the positioning plate 4.

[0020] Specifically, the elastic connector 5 is an expansion bolt, which needs to be tightened using an electric motor.

[0021] Specifically, the bottom support 1 and the vertical support 3 are box-shaped sections, and their bearing capacity must meet the load conditions of the overall segmental arch rib.

[0022] Specifically, the positioning steel plate 2 has a channel-shaped cross section, and one side of the cross section must be tightly attached to the arch rib to prevent the arch rib from slipping.

[0023] The assembly platform can be lifted and disassembled as a whole using a cable crane, which is easy to operate and can be reused, avoiding large-area and overall cutting.

[0024] Specifically, an auxiliary stabilizing structure is provided on the bottom support 1 to help fix the overall arch rib 7, ensuring its stability on the bottom support 1 and ensuring construction safety when welding the arch rib.

[0025] The auxiliary stabilizing structure includes a binding plate 8 and a tension rod 9 welded and fixed to the side of the bottom support 1. The binding plate 8 and the tension rod 9 are located on both sides of the columns at the four corners of the bottom of the overall arch rib 7.

[0026] The binding plate 8 has two binding holes 801, and reinforcing ribs are provided between the two sides and the bottom support 1.

[0027] The outer end of the tension rod 9 is provided with a limiting structure with a diameter larger than that of the tension rod 9 column.

[0028] One end of the rope 10 is tied in one of the tying holes 801, and the other end is wrapped around the circumference of the bottom column of the arch rib at least once and then tied in another tying hole 801 on the tying plate 8 via the tension rod 9.

[0029] The number of auxiliary stabilizing structures at each location can be one or two sets. When there are two sets, the two sets of auxiliary stabilizing structures are symmetrically arranged on the inner and outer sides of the bottom support 1.

[0030] Specifically, the preferred dimensions of the column structure are as follows: bottom support 1: box-shaped section 40 cm × 1.4 cm, positioning steel plate 2: rectangular section 450 cm × 5 cm, bottom support 3: box-shaped section 40 cm × 1.4 cm, and central cross brace 10: I-beam I36.

[0031] The above description is only 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 platform for the integral assembly of segmental arch ribs in a steel-concrete composite arch bridge, characterized in that, Includes a bottom support (1) and a positioning plate (4). The positioning plate (4) is fixed to the hardened ground (6) by a set of elastic connectors (5). The bottom support (1) is fixedly connected to the positioning plate (4) by a set of vertical supports (3). A set of positioning steel plates (2) is fixedly installed on the bottom support (1). The segmental arch ribs (7) of the arch bridge are hoisted and placed on the bottom support (1) and limited by the positioning steel plates (2).

2. The platform for integral assembly of segmental arch ribs in a steel-concrete composite arch bridge according to claim 1, characterized in that, The bottom support (1) and the vertical support (3) are welded together, and the lateral width of the bottom support (1) is greater than the width of the overall arch rib (7).

3. The platform for integral assembly of segmental arch ribs in a steel-concrete composite arch bridge according to claim 1, characterized in that, Both the bottom support (1) and the vertical support (3) are composed of box-shaped cross sections.

4. The platform for integral assembly of segmental arch ribs in a steel-concrete composite arch bridge according to claim 1, characterized in that, The positioning steel plate (2) is vertically set on the upper surface of the bottom support (1), and it has a channel-shaped cross section and is welded and fixed to the bottom support (1).

5. The platform for integral assembly of segmental arch ribs in a steel-concrete composite arch bridge according to claim 1, characterized in that, The vertical support (3) is set on the lower end surface of the bottom support (1) and welded to the positioning plate (4).

6. The platform for integral assembly of segmental arch ribs in a steel-concrete composite arch bridge according to claim 1, characterized in that, The elastic connector (5) is an expansion bolt.

7. The platform for integral assembly of segmental arch ribs in a steel-concrete composite arch bridge according to claim 1, characterized in that, The bottom support (1) is provided with an auxiliary stabilizing structure, which includes a binding plate (8), a tension rod (9) and a rope (10) set on the side of the bottom support (1). One end of the rope (10) is tied to the binding plate (8), and the other end is wrapped around the bottom column of the arch rib at least once and then tied to the binding plate (8) via the tension rod (9).

8. A platform for integral assembly of segmental arch ribs in a steel-concrete composite arch bridge according to claim 7, characterized in that, The binding plate (8) is provided with binding holes (801) for easy binding of both ends of the rope (10).

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