A prefabricated crash barrier and its connecting device

Abstract

The purpose of this utility model is to provide a prefabricated assembled crash barrier and its connecting device to solve the problems of long construction period, high dust pollution, high noise, and high safety requirements of traditional reinforced concrete barriers. The main features are that the barrier body has vertically embedded corrugated metal pipes, angle steel is embedded at the corners, and threaded steel bars and special-shaped steel are embedded in the bridge deck. During assembly, the threaded steel bars embedded in the bridge deck are inserted into the corrugated metal pipes embedded in the barrier body, and the special-shaped steel embedded in the bridge deck is welded to the angle steel embedded in the barrier body, thus forming a stable and reliable whole between the barrier body and the bridge deck. The beneficial effects of this utility model are that the prefabricated assembled barrier adopts factory industrial prefabrication, has a short construction period, minimal interference with the surrounding environment, high construction efficiency, high-quality finished components, simple and convenient installation, good anti-overturning and anti-collision performance, good overall integrity, and a high stability coefficient.

Description

Technical Field

[0001] This utility model relates to a prefabricated assembled crash barrier and its connecting device, belonging to the technical field of bridge crash barrier. Background Technology

[0002] Crash barriers are road traffic safety facilities that absorb collision energy by deforming themselves or forcing vehicles to climb higher, thereby reducing accident losses. Traditional reinforced concrete crash barriers are constructed using cast-in-place methods, resulting in long construction periods, significant dust pollution and noise during construction, and stringent safety requirements, thus failing to meet the needs of rapid urban development. Prefabricated construction, as a new construction method in bridge engineering, transfers most of the construction work to standardized factory production, greatly improving component production efficiency and quality. On-site assembly further enhances construction efficiency and accelerates production progress. Utility Model Content

[0003] The purpose of this utility model is to provide a prefabricated crash barrier and its connecting device to solve the problems of long construction period, large dust pollution, high noise, and high safety requirements of traditional reinforced concrete barriers.

[0004] This utility model is achieved through the following method: a prefabricated assembled crash barrier and its connecting device, comprising a barrier body, a bridge deck, embedded parts and embedded corrugated metal pipes, wherein the barrier body has vertically embedded corrugated metal pipes, angle steel is embedded at the corners of the barrier body, and threaded steel bars and special-shaped steel are embedded in the bridge deck. During assembly, the threaded steel bars embedded in the bridge deck are inserted into the embedded corrugated metal pipes in the barrier body, and the special-shaped steel embedded in the bridge deck is welded to the angle steel embedded in the barrier body, thereby forming a stable and reliable connection between the barrier body and the bridge deck.

[0005] Furthermore, laying a layer of cement mortar at the contact point between the bottom of the guardrail and the bridge deck can increase the integrity and durability of the connection between the guardrail and the bridge deck.

[0006] Furthermore, the angle steel embedded at the corners of the guardrail body is welded to the internal structural steel bars of the guardrail body, and the angle steel embedded in the guardrail body is welded to the special-shaped steel embedded in the bridge deck, which increases the stability and reliability of the overall connection.

[0007] Furthermore, fine aggregate concrete is poured a second time into the pre-embedded metal corrugated pipe within the guardrail body to fill the gap between the pre-embedded steel bars and the metal corrugated pipe, forming a firm connection.

[0008] Furthermore, each segment of the prefabricated guardrail is equipped with a convex shear key and a concave shear key at both ends. During the installation of the guardrail, the convex shear key is inserted into the concave shear key, which increases the longitudinal connection integrity of the guardrail and strengthens its shear resistance.

[0009] The beneficial effects of this utility model are as follows: This utility model is a traffic safety protection facility for bridge engineering. The prefabricated assembled guardrail adopts industrial prefabrication in the factory, with a short construction cycle, minimal interference to the surrounding environment, high construction efficiency, and high quality of finished components. During assembly, a layer of cement mortar is laid at the contact point between the bottom surface of the guardrail and the bridge deck. The pre-embedded threaded steel bars in the bridge deck are inserted into the pre-embedded metal corrugated pipes in the guardrail body. The pre-embedded special-shaped steel in the bridge deck is welded to the pre-embedded angle steel in the guardrail body. The longitudinal convex shear keys of the prefabricated guardrail are inserted into the concave shear keys of the adjacent segments. Fine stone concrete is poured into the pre-embedded metal corrugated pipes in the guardrail body, thereby forming a stable and reliable whole between the guardrail body and the bridge deck. This method is simple and convenient to install and operate. The anti-overturning and anti-collision performance of the anti-collision guardrail is good, with good integrity and high stability coefficient. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the prefabricated assembled crash barrier of this utility model;

[0011] Figure 2 This is a longitudinal elevation view of the prefabricated assembled crash barrier of this utility model.

[0012] Figure 3 This is a plan view along the bridge of the prefabricated assembled crash barrier of this utility model;

[0013] Figure 4 This is a detailed drawing of the embedded angle steel for the prefabricated assembled crash barrier of this utility model;

[0014] Figure 5 This is a detailed drawing of the pre-embedded special-shaped steel for the prefabricated assembled crash barrier of this utility model.

[0015] In the diagram: 1-Guardrail body, 2-Bridge deck pavement, 3-Bridge deck panel, 4-Threaded steel bar, 5-Guardrail steel bar, 6-Corrugated metal pipe, 7-Cement mortar cushion layer, 8-Angle steel, 9-Irregular steel, 10-Convex shear key, 11-Concave shear key, 12-Fine aggregate concrete. Detailed Implementation

[0016] To illustrate the technical means and effects of this utility model in more detail, the specific structure, features and functions of this utility model are described in detail below with reference to the accompanying drawings.

[0017] This utility model provides a prefabricated assembled crash barrier and its connecting device, including a barrier body 1, a bridge deck 3 and a bridge deck pavement 2. The barrier body 1 contains a barrier steel bar 5 and a metal corrugated pipe 6. The barrier steel bar 5 and angle steel 8 are welded together. The bridge deck 3 has pre-embedded threaded steel bars 4 and special-shaped steel 9. The two sides of the barrier body are respectively provided with a convex shear key 10 and a concave shear key 11.

[0018] During the construction of bridge deck 3, threaded steel bars 4 are pre-embedded according to the position of the pre-embedded corrugated metal pipes 6 in the guardrail body, with a spacing of 50cm along the bridge direction. According to the position of the pre-embedded angle steel 8 in the guardrail body, special-shaped steel 9 is pre-embedded at the corresponding position in bridge deck 3. The threaded steel bars 4 and special-shaped steel 9 serve as force transmission components of the guardrail body, connecting the prefabricated guardrail body 1 and bridge deck 3 into a whole, jointly bearing the impact force of the guardrail during the impact process, thus improving the integrity and stability of the guardrail.

[0019] The guardrail body 1 is prefabricated and produced in a standardized manner in the factory. During the prefabrication process, a corrugated metal pipe 6 is pre-embedded. A convex shear key 10 and a concave shear key 11 are reserved on both sides of the guardrail body. The corrugated metal pipe is positioned and combined with the threaded steel bars 4 pre-embedded in the bridge deck 3. At the same time, during the prefabrication process of the guardrail body 1, an angle steel 8 is pre-embedded. The angle steel 8 is set at the corner of the impact surface of the guardrail and is welded together with the guardrail steel bars 5. The angle steel 8 serves as a force transmission component pre-embedded in the guardrail body 1, playing a connecting role and providing a solid connection between the guardrail body 1 and the bridge deck 3.

[0020] During assembly, a 1cm thick cement mortar pad 7 is first laid on the bridge deck 3. Before hoisting the guardrail body 1, the positions of the threaded steel bar 4 and the special-shaped steel 9 are calibrated. The position of the pre-embedded metal corrugated pipe 6 is aligned with the threaded steel bar 4 and inserted. The corner of the pre-embedded angle steel 8 is placed at the center of the upper flange of the pre-embedded special-shaped steel 9. The convex shear key 10 on the outer side of the guardrail body 1 along the bridge direction is inserted into the concave shear key 11 of the adjacent guardrail body 1, which increases the overall stability and shear resistance along the bridge direction.

[0021] After the guardrail is placed in the corresponding position, fine stone concrete 12 is poured into the pre-embedded metal corrugated pipe 6. The upper flanges of the angle steel 8 and the special-shaped steel 9 are connected together by welds. The entire guardrail forms a solidly connected whole in the transverse and longitudinal directions of the bridge, which jointly bears the impact force on the guardrail and improves the overall stress capacity and stability of the crash barrier.

[0022] In this utility model, the constituent components are not isolated individuals; the various components cooperate with each other to form a prefabricated anti-collision guardrail force-bearing system. When technical personnel in the relevant profession refer to the main design concept and construction method of this utility model, they can further optimize it. All optimizations and improvements made to this utility model fall within the protection scope of this utility model.

Claims

1. A prefabricated, assembled crash barrier, characterized in that: The bridge deck includes a guardrail body (1), a bridge deck (3), and a bridge deck pavement (2). The guardrail body (1) contains guardrail steel bars (5) and metal corrugated pipes (6). The bridge deck (3) contains pre-embedded threaded steel bars (4) and special-shaped steel (9). The guardrail body is provided with convex shear keys (10) and concave shear keys (11) on both sides.

2. The prefabricated assembled crash barrier according to claim 1, characterized in that: The guardrail body (1) is prefabricated and produced in a standardized manner in the factory. The guardrail body (1) contains guardrail steel bars (5) and metal corrugated pipes (6). The guardrail steel bars (5) and angle steel (8) are welded together. The guardrail body is provided with convex shear keys (10) and concave shear keys (11) on both sides respectively.

3. The prefabricated assembled crash barrier according to claim 1, characterized in that: The bridge deck (3) is a key component of the bridge that directly bears vehicle loads. The bridge deck (3) is pre-embedded with threaded steel bars (4) and special-shaped steel (9).

4. The prefabricated assembled crash barrier according to claim 1, characterized in that: The bridge deck pavement (2) is located on the bridge deck (3) and is a secondary pouring structure for the bridge deck.

5. A prefabricated assembled crash barrier according to claim 1, characterized in that: The threaded steel bar (4) is embedded in the bridge deck (3). During assembly, the threaded steel bar (4) is inserted into the embedded metal corrugated pipe (6) as a force transmission component of the prefabricated guardrail.

6. A prefabricated assembled crash barrier connection device, characterized in that: A cement mortar cushion layer (7) is provided, which is located between the guardrail body (1) and the bridge deck (3) and serves as a connecting material for the prefabricated components.

7. A prefabricated assembled crash barrier connecting device according to claim 6, characterized in that: The angle steel (8) and the guardrail steel (5) are welded together, and the corner of the angle steel (8) is placed at the center of the upper flange of the pre-embedded special steel (9).

8. A prefabricated assembled crash barrier connecting device according to claim 6, characterized in that: The pre-embedded special-shaped steel (9) in the bridge deck (3) serves as a force transmission device for the prefabricated assembled guardrail.

9. A prefabricated assembled crash barrier connecting device according to claim 6, characterized in that: The convex shear key (10) and concave shear key (11) are located at both ends of the guardrail body (1). When the guardrail is installed, the convex shear key (10) is inserted into the concave shear key (11) as a shear-resistant device for the guardrail.

10. A prefabricated assembled crash barrier connecting device according to claim 6, characterized in that: The fine aggregate concrete (12) is filled into the metal corrugated pipe (6) and is a secondary casting structure.

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