Fabricated bridge concrete prefabricated cover beam fixing structure

Abstract

The utility model belongs to the field of bridges, and discloses an assembly type bridge concrete prefabricated cover beam fixing structure. Comprising a bent cap, the bent cap comprises a prefabricated bent cap middle section and prefabricated bent cap cantilever sections arranged on the two sides of the prefabricated bent cap middle section, bent cap glue joints between the bent cap middle section and the prefabricated bent cap cantilever sections are fixedly connected through structural glue, and steel tooth hangers are arranged on one sides of the prefabricated bent cap middle section and the prefabricated bent cap cantilever sections; the steel tooth hangers are fixedly connected with the prefabricated cover beam middle section or the prefabricated cover beam cantilever section through connecting pieces, the steel tooth hangers on the same horizontal line are fixedly connected through pull rods, shear keys are arranged on the splicing faces of the prefabricated cover beam middle section and the prefabricated cover beam cantilever section, the friction force between the splicing faces is increased, and therefore the shear bearing capacity of the whole structure is improved. When the bridge bears load, relative sliding between the splicing faces can be effectively prevented, and the overall stability and safety of the bridge are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of bridge technology and relates to a fixing structure for precast concrete cap beams of assembled bridges. Background Technology

[0002] In the construction of prefabricated bridges, the construction method of precast concrete cap beams is crucial. Currently, common construction methods include integral cap beams, two-segment wet-jointed cap beams, and multi-segment glued-jointed cap beam prefabrication and installation. Each of these methods has its advantages, but choosing the most suitable construction method for specific engineering needs and environmental conditions is essential.

[0003] Prefabricated bridge construction not only significantly shortens the construction period and reduces the impact on road traffic, but also ensures construction quality and safety while minimizing environmental impact. It is suitable for projects with strict time constraints or limitations on traffic disruption.

[0004] In the construction of elevated bridges, multi-stage cantilever precast cap beams with adhesive joints are very common. These cap beams typically have large lengths and weights, and overall prefabrication is often limited by urban road traffic restrictions and lifting equipment capabilities. Therefore, integral or two-stage prefabrication and hoisting processes may be difficult to implement in these situations. Cantilever adhesive joint assembly installation offers an effective solution.

[0005] The construction of adhesive joints for multi-stage cantilever precast cap beams presents certain technical challenges. The joint treatment between the cantilever section and the intermediate section of the precast cap beam is a crucial step. How to temporarily anchor the cantilever section and the intermediate section of the precast cap beam to accelerate the splicing process is a technical problem that needs to be solved. Utility Model Content

[0006] The purpose of this utility model is to provide a precast concrete cap beam fixing structure for assembled bridges, which addresses the shortcomings of the prior art by fixing steel toothed brackets to the middle section and one side of the cantilever section of the precast cap beam. The force generated by the self-weight of the cantilever section of the precast cap beam is transferred to the middle section of the cap beam through tie rods for temporary anchoring, thereby accelerating the splicing efficiency.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A precast concrete cap beam fixing structure for assembled bridges includes: a cap beam, the cap beam including a precast cap beam intermediate section and precast cap beam cantilever sections disposed on both sides of the precast cap beam intermediate section, the cap beam adhesive joint between the cap beam intermediate section and the precast cap beam cantilever sections being fixedly connected by structural adhesive, a steel toothed sill is provided on one side of the precast cap beam intermediate section and the precast cap beam cantilever section, the steel toothed sill is fixedly connected to the precast cap beam intermediate section or the precast cap beam cantilever section by a connector, and the steel toothed sills on the same horizontal line are fixedly connected by tie rods.

[0008] Furthermore, it also includes a fastener, which is sleeved on the outside of the pull rod; multiple first reserved holes are provided on both sides of the steel toothed bracket, and the pull rod is set in the first reserved hole and detachably connected to the steel toothed bracket through the fastener.

[0009] Furthermore, the upper and lower ends of the steel toothed bracket are provided with reserved channels, and the reserved channels are provided with multiple second reserved holes.

[0010] Furthermore, the middle section and / or the cantilever section of the precast cap beam are provided with multiple third reserved holes on the side near the steel toothed sill.

[0011] Furthermore, the second reserved hole is compatible with the third reserved hole.

[0012] Furthermore, a plurality of second reserved holes are arranged in a horizontal direction; a plurality of third reserved holes are arranged in a horizontal direction.

[0013] Furthermore, multiple first reserved holes are arranged in a vertical direction.

[0014] Furthermore, shear keys are provided on the splicing surfaces of the intermediate section and / or cantilever section of the precast cap beam.

[0015] Furthermore, it also includes a connector, which passes through the second and third reserved holes from the outside to the inside and is fixedly connected to the middle section or cantilever section of the precast cap beam.

[0016] Furthermore, a fastener is provided on the side of the connector away from the steel toothed groove, and the fastener is detachably connected to the connector.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] This utility model discloses a prefabricated concrete cap beam fixing structure for assembled bridges. A third reserved hole is provided on the middle section and the cantilever section of the prefabricated cap beam for fixing a steel toothed sill. Tie rods are installed on the steel toothed sills, and prestress is applied to the tie rods through a prestressing device, so that the middle section and the cantilever section of the prefabricated cap beam can be temporarily tied together, which plays a good role in force transmission.

[0019] This utility model discloses a precast concrete cap beam fixing structure for assembled bridges. Shear keys are provided at the splicing surfaces of the middle and cantilever sections of the precast cap beam to increase the friction between the splicing surfaces, thereby improving the shear bearing capacity of the entire structure. When the bridge is under load, it effectively prevents relative sliding between the splicing surfaces, ensuring the overall stability and safety of the bridge.

[0020] This utility model discloses a precast concrete cap beam fixing structure for assembled bridges. After the construction of the middle section and cantilever section of the precast cap beam is completed, the tie rods and steel rulers can be removed, making the bridge structure lighter. This helps to reduce the self-weight of the bridge, thereby reducing the requirements for the foundation and saving material costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of a precast concrete cap beam fixing structure for assembled bridges according to this utility model.

[0023] Figure 2 for Figure 1 A sectional view;

[0024] Figure 3 This is a schematic diagram of the steel toothed bracket in an embodiment of this utility model.

[0025] Figure label:

[0026] 1-Cap beam; 11-Intermediate section of precast cap beam; 12-Cantilever section of precast cap beam; 13-Connector; 2-Steel toothed sill; 3-Tie rod; 4-Fixed component; 5-Reserved duct. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, such as a process, method, system, product, or apparatus comprising a series of steps or units, are not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings:

[0030] Example 1

[0031] This utility model provides a precast concrete cap beam fixing structure for assembled bridges, such as... Figure 1 As shown, the structure includes a cap beam 1, which comprises a precast cap beam intermediate section 11 and precast cap beam cantilever sections 12 disposed on both sides of the precast cap beam intermediate section 11. The cap beam adhesive joint between the cap beam intermediate section 11 and the precast cap beam cantilever sections 12 is fixedly connected by structural adhesive. A steel toothed sill 2 is provided on one side of the precast cap beam intermediate section 11 and the precast cap beam cantilever sections 12. The steel toothed sill 2 is fixedly connected to the precast cap beam intermediate section 11 or the precast cap beam cantilever sections 12 by connectors 13. The steel toothed sills 2 on the same horizontal line are fixedly connected by tie rods 3.

[0032] Specifically, the cap beam 1 includes a precast cap beam intermediate section 11 and a precast cap beam cantilever end 12. The precast cap beam cantilever end 12 is located on both sides of the precast cap beam intermediate section 11. In addition, shear keys are provided at the splicing surface between the precast cap beam intermediate section 11 and the precast cap beam cantilever section 12. The main function of the shear keys is to increase the friction between the splicing surfaces, thereby improving the shear bearing capacity of the entire structure. When the bridge is subjected to loads, especially dynamic loads (such as vehicle traffic), the shear keys can effectively prevent relative sliding between the splicing surfaces, ensuring the overall stability and safety of the bridge.

[0033] Multiple steel toothed sills 2 are provided on the side of the precast cap beam cantilever section 12 near the middle section 11 of the precast cap beam. The number of steel toothed sills 2 is determined by the cap beam 1. In this embodiment, there are two steel ruler cuts 2 on the cantilever end 12 of the precast cap beam. Similarly, multiple steel ruler cuts 2 are also provided on the side of the middle section 11 of the precast cap beam near the cantilever section 12 of the precast cap beam. The number of steel ruler cuts 2 on the middle section 11 of the precast cap beam is the same as the number of steel ruler cuts 2 on the cantilever section 12 of the precast cap beam.

[0034] Multiple third reserved holes are provided on the side of the precast cap beam middle section 11 near the precast cap beam cantilever section 12, and multiple third reserved holes are also provided on the side of the precast cap beam cantilever section 12 near the precast cap beam middle section 11. The multiple third reserved holes are arranged in the horizontal direction.

[0035] like Figure 2 As shown, the steel ruler cutter 2 has pre-drilled holes 5 at both ends. Second pre-drilled holes are provided on these pre-drilled holes, and the number of second pre-drilled holes matches the number of third pre-drilled holes. The connector 13 passes through the second and third pre-drilled holes from the outside in, fixing the steel ruler cutter 2 to the middle section 11 of the precast cap beam, or fixing the steel ruler cutter 2 to the cantilever section 12 of the precast cap beam. In this embodiment, the connector 13 is an anchor rod; in other words, the connector 13 is threadedly connected to the cap beam 1.

[0036] One end of the connector 13 passes through the middle section 11 of the precast cap beam or the cantilever end 12 of the precast cap beam, and the other end is at the outer end of the steel ruler cut 2. The outer surface of the other end of the connector 13 is provided with a fastener. In this embodiment, the fastener is an anchor nut to prevent the connector 13 from falling off.

[0037] Specifically, the connector 13 can pass through a part of the cap beam 1 at one end—either the middle section 11 of the precast cap beam or the cantilever section 12 of the precast cap beam—and extend to the outer end of the steel ruler cutter 2 at the other end, serving as a connection and fixation component.

[0038] To prevent the connector 13 from falling off or loosening during use, fasteners are provided on the outer surface of the portion of the connector 13 that extends to the outer end of the steel ruler cutter 2. Anchor nuts are tightened to secure the connector 13, ensuring a stable connection between the cap beam 1 and the steel ruler cutter 2.

[0039] This not only ensures a stable connection between the cap beam 1 and the steel ruler cutter 2, but also enhances the overall structural safety through fasteners such as anchor nuts. Even under external forces or vibrations, the connector 13 is not prone to falling off or loosening, thus guaranteeing stability and durability.

[0040] like Figure 3 Figure a shows a structural schematic diagram of the steel toothed bracket 2. The steel toothed bracket 2 is composed of a base plate and a toothed plate welded together. The structural schematic diagram of the base plate is shown below. Figure 3 As shown in b, the structural schematic diagram of the toothed plate is as follows. Figure 3 As shown in c.

[0041] The steel ruler cutter 2 has multiple first reserved holes on its left and right sides. The first reserved holes on the same horizontal line are interconnected. The pull rod 3 passes through the first reserved holes in the horizontal direction and is installed in the steel ruler cutter 2.

[0042] by Figure 1For example, a fixing element is provided on the left side of the tie rod 3 on the cantilever section 12 of the precast cap beam, and a fixing element is provided on the right side of the tie rod 3 on the middle section 11 of the precast cap beam. In this embodiment, the fixing element is a tie rod nut. The tie rod 3 is temporarily fixed to the middle section 11 of the precast cap beam by cutting with a steel ruler 2.

[0043] With the assistance of tie rod 3, fasteners, and steel ruler cutter 2, the cantilever section 12 of the precast cap beam and the intermediate section 11 of the precast cap beam can be temporarily fixed before final fixing. This helps ensure stability and precision during construction, thereby improving the quality and efficiency of bridge construction.

[0044] In addition, structural adhesive is applied to the side of the precast cap beam cantilever section 12 opposite to the middle section 11 of the precast cap beam.

[0045] During the assembly of the precast cantilever section 12 and the intermediate section 11 of the precast cap beam, structural adhesive is typically applied to their opposite sides to ensure a strong and durable connection. Structural adhesive is a high-performance adhesive with excellent bond strength, durability, and weather resistance. It effectively bonds the precast cantilever section 12 and the intermediate section 11 together, forming a unified structure, thereby improving the stability and load-bearing capacity of the bridge structure.

[0046] By using structural adhesive, the connection between the cantilever section 12 and the intermediate section 11 of the precast cap beam will be more robust and reliable, thereby ensuring the overall stability and safety of the bridge structure. It also has the advantages of fast construction speed and controllable quality, which helps to improve the efficiency and quality of bridge construction.

[0047] Finally, after the construction of the middle section 11 and the cantilever section 12 of the precast cap beam is completed, the tie rod 3 and the steel ruler cutter 2 can be removed.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A prefabricated concrete pier fixing structure of an assembled bridge, characterized in that: it comprises a pier (1), the pier (1) comprises a prefabricated pier middle section (11) and prefabricated pier cantilever sections (12) arranged on both sides of the prefabricated pier middle section (11), a pier glue joint between the prefabricated pier middle section (11) and the prefabricated pier cantilever sections (12) is fixedly connected by structural glue, a steel tooth ridge (2) is arranged on one side of the prefabricated pier middle section (11) and the prefabricated pier cantilever sections (12), the steel tooth ridge (2) is fixedly connected with the prefabricated pier middle section (11) or the prefabricated pier cantilever sections (12) through a connecting piece (13), and the steel tooth ridges (2) on the same horizontal line are fixedly connected through a pull rod (3).

2. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 1, characterized in that: it further comprises a fixing piece (4), the fixing piece (4) is sleeved outside the pull rod (3); first reserved holes are arranged on both sides of the steel tooth ridge (2), the pull rod (3) is arranged in the first reserved holes, and the steel tooth ridge (2) is detachably connected with the fixing piece (4).

3. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 1, characterized in that: reserved hole channels (5) are arranged at the upper end and the lower end of the steel tooth ridge (2), and a plurality of second reserved holes are arranged on the reserved hole channels (5).

4. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 3, characterized in that: a plurality of third reserved holes are arranged on the side close to the steel tooth ridge (2) of the prefabricated pier middle section (11) and / or the prefabricated pier cantilever sections (12).

5. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 4, characterized in that: the second reserved holes are matched with the third reserved holes.

6. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 4, characterized in that: a plurality of the second reserved holes are arranged in a horizontal direction; and a plurality of the third reserved holes are arranged in a horizontal direction.

7. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 2, characterized in that: a plurality of the first reserved holes are arranged in a vertical direction.

8. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 1, characterized in that: shear keys are arranged on the splicing surfaces of the prefabricated pier middle section (11) and / or the prefabricated pier cantilever sections (12).

9. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 3, characterized in that: it further comprises a connecting piece (13), the connecting piece (13) passes through the second reserved holes, the third reserved holes and the prefabricated pier middle section (11) or the prefabricated pier cantilever sections (12) from outside to inside and is fixedly connected.

10. The prefabricated concrete pier fixing structure of an assembled bridge according to claim 9, characterized in that: a fastener is arranged on the side away from the steel tooth ridge (2) of the connecting piece (13), and the fastener is detachably connected with the connecting piece (13). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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