Bridge rapid construction structure and bridge
By using precast small box girders and dry connection structures, and by combining cross channel steel and pre-embedded anchor plates, the problems of long construction cycle and unstable quality of traditional bridge transverse connection have been solved, achieving fast and precise bridge installation and efficient construction results.
Patent Information
- Application Number
- CN202522654841.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-15
AI Technical Summary
Traditional bridge transverse connection structures use cast-in-place concrete diaphragm beams or wet joints in the bridge deck, which have long construction cycles, low efficiency, and quality that is greatly affected by the site environment, and also occupy a large construction site.
The system employs prefabricated small box girders, transverse connection components, and anchoring components, including intersecting channel steel and embedded anchor plates. Dry connections are achieved through factory production, avoiding on-site formwork and maintenance procedures. Rapid installation is achieved by precisely embedding the anchor plates and connecting them with high-strength bolts.
This enabled rapid bridge construction, shortened the construction period, improved installation accuracy and construction quality, avoided quality problems and site occupation associated with cast-in-place concrete, and enhanced the overall collaborative performance of the bridge.
Smart Images
Figure CN224942993U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge structure technology, and in particular to a bridge rapid construction structure and a bridge. Background Technology
[0002] With the rapid development of my country's transportation infrastructure construction, higher demands have been placed on the efficiency, quality, and impact on existing traffic during bridge construction. Rapid bridge construction technology has been widely adopted due to its ability to significantly shorten on-site work time, reduce traffic disruptions, and improve project quality. Among these technologies, precast concrete small box girders have become the mainstream rapid construction component for small and medium-span bridges due to their advantages such as good structural performance, high degree of factory production, and convenient installation.
[0003] In precast small box girder bridges, effective lateral connection structures must be established between the individual box girders to connect multiple independent beams into a unified bridge deck, jointly bearing vehicle loads and ensuring the overall stability and load-bearing performance of the bridge. Traditional lateral connection structures often employ cast-in-place concrete diaphragms or wet joints in the bridge deck. While this type of "wet work" connection method can ultimately form a unified structure, it involves a series of cumbersome procedures, including on-site formwork, rebar tying, concrete pouring, and curing, resulting in a long construction period and low efficiency. Furthermore, the quality of cast-in-place concrete is greatly affected by the site environment, making it prone to cracking, and the curing period requires a large construction area, significantly impacting traffic under the bridge and the surrounding environment. Utility Model Content
[0004] The purpose of this utility model is to provide a bridge rapid construction structure and bridge to alleviate the problem of long construction cycle and low efficiency in the existing technology where the transverse connection structure between each small box girder uses cast-in-place concrete diaphragm beams or wet joints of bridge deck.
[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: In the first aspect, this utility model provides a bridge rapid construction structure, comprising: at least two small box girders arranged in parallel; A transverse connecting assembly, the ends of which are respectively connected to the two small box girders; An anchoring assembly, comprising an anchor plate fixedly disposed on the side of the small box girder, wherein the transverse connection assembly is connected to the anchor plate via a connector.
[0006] Furthermore, the transverse connection assembly includes a first channel steel and a second channel steel arranged in a cross configuration, wherein the first channel steel and the second channel steel are respectively connected to the beam end or the beam-to-beam portion of the small box girder.
[0007] Furthermore, the anchor plate has multiple pre-drilled bolt holes, and the ends of the first channel steel and the second channel steel are respectively connected to the anchor plate by anchor bolts.
[0008] Furthermore, the anchor plate is an embedded part, which is pre-embedded in the concrete during the precasting and casting of the small box girder, and the connecting surface with bolt holes is exposed on the side of the small box girder.
[0009] Furthermore, the anchoring assembly also includes a connecting plate, which is fixedly disposed inside the small box girder and is fixedly connected to the anchor plate.
[0010] Furthermore, the connecting plate and the anchor plate are fixedly connected by anchoring steel bars, which are embedded in the concrete of the small box girder.
[0011] Furthermore, the end sections of the first channel steel and the second channel steel are cut to form oblique sections that match the side angle of the small box girder, so that the ends of the first channel steel and the second channel steel can fit into the anchor plate.
[0012] Furthermore, the transverse connection assembly also includes a node plate, which is fixedly disposed at the intersection of the first channel steel and the second channel steel.
[0013] Furthermore, the node plate is fixedly connected to the flanges of the first channel steel and the second channel steel by welding.
[0014] Secondly, this utility model provides a bridge, including the bridge rapid construction structure described in the first aspect.
[0015] This utility model can bring at least the following beneficial effects: The bridge rapid construction structure provided by this utility model includes: at least two parallel small box girders; a transverse connecting component, the ends of which are respectively connected to the two small box girders; and an anchoring component, which includes an anchor plate fixedly disposed on the side of the small box girder, and the transverse connecting component is connected to the anchor plate through a connector.
[0016] The small box girders, transverse connecting components, and anchor plates can all be prefabricated in the factory, requiring only connection work on site. This achieves completely "dry" construction, avoiding the lengthy processes of formwork and curing required for cast-in-place concrete, significantly shortening the construction period, increasing construction speed, and enhancing industrialization, thus aligning with the concept of rapid bridge construction. The transverse connecting components connecting two small box girders effectively transfer shear force, bending moment, and torque between the beams, ensuring the overall collaborative performance of the bridge. The anchor plates, as embedded parts, are precisely pre-positioned with the small box girders during factory prefabrication. On-site installation simply requires aligning and fixing the transverse connecting components to the anchor plates, avoiding errors and adjustments in on-site measurement and positioning. This simplifies installation, ensures high accuracy, and facilitates construction. Furthermore, the rapid construction structure avoids the quality problems associated with cast-in-place concrete and the need for large construction sites during curing, ensuring controllable construction quality and minimizing space requirements.
[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 A schematic diagram of a bridge rapid construction structure provided in an embodiment of this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the structure of the anchor plate provided in an embodiment of the present utility model.
[0020] icon: 100 - Small box girder; 200 - Lateral connection assembly; 210 - First channel steel; 220 - Second channel steel; 230 - Node plate; 300 - Anchoring assembly; 310 - Anchor plate; 311 - Bolt hole; 320 - Connecting plate. Detailed Implementation
[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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 on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.
[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0025] In the description of this utility model, it should also 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.
[0026] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other. Figure 1 A schematic diagram of a bridge rapid construction structure provided in an embodiment of this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the structure of the anchor plate provided in an embodiment of the present utility model.
[0027] Example 1 In precast small box girder bridges, effective lateral connection structures must be established between the individual box girders to connect multiple independent beams into a unified bridge deck, jointly bearing vehicle loads and ensuring the overall stability and load-bearing performance of the bridge. Traditional lateral connection structures often employ cast-in-place concrete diaphragms or wet joints in the bridge deck. While these "wet work" connection methods ultimately form a unified structure, they involve a series of cumbersome procedures, including on-site formwork, rebar tying, concrete pouring, and curing, resulting in a long construction period and low efficiency. Furthermore, the quality of cast-in-place concrete is greatly affected by the site environment, making it prone to cracking, and the curing period requires a significant amount of construction space, significantly impacting traffic under the bridge and the surrounding environment.
[0028] In view of this, the present invention provides a bridge rapid construction structure, including: at least two parallel small box girders 100; a transverse connecting component 200, the ends of which are respectively connected to the two small box girders 100; and an anchoring component 300, which includes an anchor plate 310 fixedly disposed on the side of the small box girder 100, and the transverse connecting component 200 is connected to the anchor plate 310 through a connector.
[0029] The small box girder 100, transverse connecting component 200, and anchor plate 310 can all be prefabricated in the factory, requiring only connection work on site. This achieves completely "dry" construction, avoiding the lengthy processes of formwork and curing required for cast-in-place concrete, greatly shortening the construction period, increasing construction speed, and enhancing industrialization, thus aligning with the concept of rapid bridge construction. The transverse connecting component 200 connects the two small box girders 100, effectively transferring shear force, bending moment, and torque between the beams, ensuring the overall collaborative performance of the bridge. The anchor plate 310, as an embedded part, is precisely pre-positioned with the small box girder 100 during factory prefabrication. On-site installation only requires aligning and fixing the transverse connecting component 200 with the anchor plate 310, avoiding errors and adjustments in on-site measurement and positioning, simplifying installation, ensuring high accuracy, and facilitating construction. Furthermore, the rapid construction structure avoids the quality problems of cast-in-place concrete and the problem of occupying large construction sites during curing, ensuring controllable construction quality and minimizing space requirements.
[0030] In an optional embodiment, the transverse connection assembly 200 includes a first channel steel 210 and a second channel steel 220 arranged in a cross configuration, with the first channel steel 210 and the second channel steel 220 respectively connected to the beam end or the beam section of the small box girder 100.
[0031] Please see Figure 1The first channel steel 210 and the second channel steel 220 are arranged in an X-shape, intersecting each other. The first channel steel 210 and the second channel steel 220 are installed at the ends of adjacent small box girders 100, or, depending on design requirements, at the beam-to-beam ratio between spans. The intersecting arrangement of the first channel steel 210 and the second channel steel 220 forms an X-shaped transverse connection system, constituting a stable truss structure with spatial stiffness far exceeding that of a single or parallel channel steel. The first channel steel 210 and the second channel steel 220 can effectively transfer shear force, bending moment, and torque between the small box girders 100, significantly improving the overall collaborative performance of the bridge.
[0032] In an optional embodiment, the anchor plate 310 is pre-drilled with multiple bolt holes 311, and the ends of the first channel steel 210 and the second channel steel 220 are respectively connected to the anchor plate 310 by anchor bolts.
[0033] Please see Figure 3 Multiple bolt holes 311 are arranged in a rectangular array on the anchor plate 310, and the first channel steel 210 and the second channel steel 220 are fixed to the anchor plate 310 by anchor bolts. The anchor plate 310 is embedded in the concrete as a pre-embedded part during the precast casting of the small box girder 100, and its connecting surface with bolt holes 311 is exposed on the side of the small box girder 100, which facilitates the connection with the first channel steel 210 and the second channel steel 220 during later construction.
[0034] In an optional embodiment, the anchoring assembly 300 further includes a connecting plate 320, which is fixedly disposed inside the small box girder 100 and is fixedly connected to the anchor plate 310.
[0035] Please see Figure 2 To enhance connection strength, this embodiment also includes a connecting plate 320, which is fixedly connected to the anchor plate 310 via anchoring steel bars embedded in the concrete of the small box girder 100. Anchor bolts fix the first channel steel 210 and the second channel steel 220 to the anchor plate 310, while the connecting plate 320 is also fixedly connected to the anchor plate 310. This ensures that the first channel steel 210, the second channel steel 220, the anchor plate 310, the connecting plate 320, and the small box girder 100 are connected as a whole, enhancing structural strength.
[0036] Furthermore, the end sections of the first channel steel 210 and the second channel steel 220 are cut to form oblique sections that match the side angle of the small box girder 100, so that the ends of the first channel steel 210 and the second channel steel 220 can fit against the anchor plate 310. Then, high-strength bolts are used to pass through the holes at the ends of the first channel steel 210 and the second channel steel 220 and the bolt holes 311 on the anchor plate 310 to fasten the first channel steel 210 and the second channel steel 220 to the small box girder 100.
[0037] In an optional embodiment, the transverse connection assembly 200 further includes a node plate 230, which is fixedly disposed at the intersection of the first channel steel 210 and the second channel steel 220.
[0038] For details, please see Figure 1 The node plate 230 is fixedly connected to the flanges of the first channel steel 210 and the second channel steel 220 by welding. The node plate 230 is made of a steel node plate of sufficient thickness. The node plate 230 covers the upper and lower flanges or webs at the intersection of the first channel steel 210 and the second channel steel 220, clamping and fixing the intersection point to form a rigid node.
[0039] As an alternative, the node plate 230 can be composed of two opposing clamping plates. The intersection of the first channel steel 210 and the second channel steel 220 is placed between the two clamping plates, and then the two clamping plates are fastened together with the channel steel held in the middle using through high-strength bolts, thus forming a reliable rigid connection.
[0040] The construction process of the rapid bridge construction structure in this embodiment is as follows: When casting the small box girder 100 in the prefabrication plant, the anchor plate 310 and connecting plate 320 are precisely embedded in the designated positions of the small box girder 100. First, the prefabricated small box girder 100 is transported to the construction site and hoisted onto the pier cap beam. Next, the first channel steel 210 and the second channel steel 220 are hoisted into position, aligning their ends with the anchor plate 310 on the corresponding small box girder 100, and anchor bolts are inserted for initial fixation. Then, at the intersection of the first channel steel 210 and the second channel steel 220, a node plate 230 is welded to enhance the connection strength. Finally, the anchor bolts are tightened to the designed torque, completing the installation of the entire transverse connection structure.
[0041] Example 2 This embodiment provides a bridge, including the rapid construction structure of the bridge in Embodiment 1. All key components, including the small box girder 100, anchor plate 310, first channel steel 210, second channel steel 220, and node plate 230, can be prefabricated in the factory. Only connection work is required on site, avoiding the lengthy procedures such as formwork and curing required for cast-in-place concrete, greatly shortening the construction period and conforming to the concept of rapid bridge construction.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A rapid construction structure for bridges, characterized in that, include: At least two small box girders set in parallel; A transverse connecting assembly, the ends of which are respectively connected to the two small box girders; An anchoring assembly, comprising an anchor plate fixedly disposed on the side of the small box girder, wherein the transverse connection assembly is connected to the anchor plate via a connector.
2. The bridge rapid construction structure according to claim 1, characterized in that, The transverse connection assembly includes a first channel steel and a second channel steel arranged at intersections, and the first channel steel and the second channel steel are respectively connected to the beam end or the beam-to-beam portion of the small box girder.
3. The bridge rapid construction structure according to claim 2, characterized in that, The anchor plate has multiple pre-drilled bolt holes, and the ends of the first channel steel and the second channel steel are respectively connected to the anchor plate by anchor bolts.
4. The bridge rapid construction structure according to claim 3, characterized in that, The anchor plate is an embedded part, which is pre-embedded in the concrete during the precasting and casting of the small box girder, and the connecting surface with bolt holes is exposed on the side of the small box girder.
5. The bridge rapid construction structure according to claim 4, characterized in that, The anchoring assembly also includes a connecting plate, which is fixedly disposed inside the small box girder and is fixedly connected to the anchor plate.
6. The bridge rapid construction structure according to claim 5, characterized in that, The connecting plate and the anchor plate are fixedly connected by anchoring steel bars, which are embedded in the concrete of the small box girder.
7. The bridge rapid construction structure according to claim 2, characterized in that, The end sections of the first channel steel and the second channel steel are cut to form oblique sections that match the side angle of the small box girder, so that the ends of the first channel steel and the second channel steel can fit into the anchor plate.
8. The bridge rapid construction structure according to claim 2, characterized in that, The transverse connection assembly also includes a node plate, which is fixedly disposed at the intersection of the first channel steel and the second channel steel.
9. The bridge rapid construction structure according to claim 8, characterized in that, The node plate is fixedly connected to the flanges of the first channel steel and the second channel steel by welding.
10. A bridge, characterized in that, Including the bridge rapid construction structure as described in any one of claims 1-9.