CN115506231A - An anti-fall beam support - Google Patents

Abstract

The application discloses an anti-drop beam support. The anti-drop beam support is suitable for restricting the longitudinal displacement of the beam body when the longitudinal displacement of the beam body is too large. The anti-fall beam support includes: a limit plate, which is provided with a limit hole; The movable gap is set in the limit hole and anchored inside the pier; a positioning steel bar is used for the limit plate to penetrate the beam body. In this solution, by passing the fixed anchor rod in the limit hole in the way of leaving a movable gap in the longitudinal direction and anchoring it inside the pier, on the one hand, the length of the bridge that can slide due to vibration can be reserved, and on the other hand On the one hand, it can effectively limit the longitudinal movement of the beam body and prevent the bridge from falling; at the same time, the vertical displacement of the bridge can be limited by fixing the anchor rod to further prevent the support from falling out.

Description

An anti-fall beam support

technical field

The present application relates to the technical field of anti-seismic bridges, in particular to an anti-drop beam support.

Background technique

In recent years, with the rapid development of bridge engineering in my country, various new types of bridge structures and projects have emerged, and new special requirements have been put forward for bridge engineering in my country. Specifically, after strong earthquakes, bridges still need to maintain basic traffic requirements. This just needs to be provided with anti-drop beam device on bridge or support.

In the related art, the anti-seismic effect of the beam support is insufficient.

Contents of the invention

In view of this, the application provides the anti-drop beam support, which can improve the seismic effect of the bridge.

The application provides an anti-fall beam support, which is suitable for fixing bridge piers and beam bodies. The anti-fall beam support includes:

A limiting plate, which defines a limiting hole;

A fixed anchor rod is passed through the limiting hole in the manner of leaving a movable gap in the longitudinal direction and is anchored inside the pier;

A positioning steel bar is used for the limit plate to pass through the beam body.

Optionally, the overall positioning reinforcement is U-shaped.

Optionally, it also includes a plate-type rubber bearing cushioned on the bottom surface of the limiting plate.

Optionally, the positioning steel bar is welded on the limiting plate, and the distance between the welding position and the wide center line of the limiting plate is less than the half-width of the bottom surface of the beam body.

Optionally, grouting pipes are reserved in the bridge pier for sealing after the fixed anchor rods pass through.

Optionally, the width of the limiting plate is greater than the width of the bottom plate of the beam body, and the bottom surface of the limiting plate is flat with the bottom surface of the beam body.

Compared with related technologies, the present application has the following beneficial effects:

1. In this application, the fixed anchor rod is inserted into the limiting hole and anchored inside the pier by leaving a movable gap in the longitudinal direction. On the one hand, the length of the bridge that can be slid due to vibration can be reserved. On the other hand, It can effectively limit the longitudinal movement of the beam body and prevent the bridge from falling; at the same time, the vertical displacement of the bridge is limited by fixing the anchor rod to further prevent the support from falling out.

2. This application can effectively limit the displacement of the bridge superstructure caused by extreme vehicle loads, earthquakes, etc., and can greatly improve the anti-drop performance of the bridge structure.

3. This application has the characteristics of simple structure, low cost, and easy manufacture and installation. The anti-fall beam limit support can easily replace the rubber support part. While achieving the same limit effect of the anti-fall beam device, the cost of this application is compared with Existing installations can be significantly reduced.

Description of drawings

The technical solutions and other beneficial effects of the present application will be apparent through the detailed description of the specific embodiments of the present application below in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of a limiting hole provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of the anti-fall beam support provided by the embodiment of the present application when the steel bar is bent.

Fig. 3 is a schematic cross-sectional structure diagram of the anti-fall beam support of the present application.

Fig. 4 is a schematic diagram of the three-dimensional structure of the anti-fall beam support of the present application.

Fig. 5 is a three-dimensional structural schematic view of the anti-fall beam support of the present application during installation.

Among them, the components in the figure are marked as follows:

1-limiting plate; 2-limiting hole; 3-positioning steel bar; 4-fixed anchor; 5-plate rubber bearing; 6-hardened sealing ring; 7-grouting pipe;

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

In the description of the present application, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The following disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and arrangements of specific examples are described below. Of course, they are examples only and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or reference letters in various instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

Before introducing the technical solution of this application, it is necessary to explain the creation background of the invention of this application.

It is common that, in related technologies, under the action of external force (such as earthquake, automobile impact, temperature, etc.), the beam body will undergo longitudinal displacement on the supporting structure and the support will be voided, and the excessive longitudinal displacement is One of the main forms of earthquake damage. If the longitudinal displacement is too large, the support will move too much and the beam will be damaged or even drop, making the bridge unusable. Under earthquake action, when the displacement of the beam body exceeds the overlapping length of the bridge pier, the beam body will easily cause the girder to fall or damage the beam body and the bridge pier. This phenomenon is more obvious in bridges with longer lengths or simply supported girder bridges. . Falling beams have a huge impact on blocking emergency rescue, hindering post-disaster reconstruction, and reducing overall social functions, and the indirect losses caused are even more difficult to estimate. In order to prevent the displacement and fall of the girder body, an anti-fall beam structure for limiting the displacement of the lateral girder body is arranged between the girder body and the bridge abutment (bridge pier). However, the bridge anti-fall beam limit mechanism currently on the market lacks the longitudinal limit function, or the width of the bridge cover beam is not enough. In an earthquake, it is easy to cause insufficient seismic performance due to the small range of movement of the bridge's anti-fall beam measures. .

Based on the inventor's awareness of the above problems, the inventor proposed the anti-fall beam support. The application passes the fixed anchor rod in the limit hole and anchors it inside the pier by leaving a movable gap in the longitudinal direction. , On the one hand, it can leave the length of the bridge that can slide due to vibration, on the other hand, it can effectively limit the longitudinal movement of the beam body to prevent the bridge from falling; at the same time, the vertical displacement of the bridge is limited by fixing the anchor rod, and the beam is further prevented from falling. Thus, the present invention is established.

Referring to Figures 1-5, the anti-fall beam support provided by the present application is suitable for fixing the pier 9 and the beam body 8. The above-mentioned anti-fall beam support includes:

A limiting plate 1, which defines a limiting hole 2;

A fixed anchor rod 4 is passed through the limiting hole and anchored inside the pier in a manner that leaves a movable gap in the longitudinal direction;

A positioning steel bar 3 is used for the limit plate to pass through the above-mentioned beam body 8 .

The size of the "movable gap" in the previous expression "the fixed anchor rod 4 leaves a movable gap in the longitudinal direction and is inserted in the above-mentioned limiting hole 2" can be actually adjusted according to the displacement required for the beam body 8 to fall off, specifically Said, the length of the movable gap is less than the required displacement of the beam body 8 coming off.

It is easy to imagine that the diameter of the hole is larger than the diameter of the fixed anchor rod 4 .

As for the specific structure or shape of the anchor rod 4, the anchor rod 4 widely used in building concrete can be used.

In order to lock and prevent slippage at the end of the fixed anchor rod 4 inserted into the pier 9 , as an exemplary implementation, a hardened sealing ring 6 is provided at the end of the fixed anchor rod 4 deep inside the pier 9 .

In this way, the loosening of the nut of the fixed anchor rod 4 is prevented by the elasticity of the hardened sealing ring 6 .

In order to further facilitate the installation and construction of the fixed anchor 4 and the pier 9, a grouting pipe 7 is reserved at the pier 9, so that after the fixed anchor 4 passes through, concrete slurry is injected into the grouting pipe, and then the fixed anchor 4 is sealed.

As for the shape of the limiting hole 2, in order to further reduce the design size of the limiting hole 2, the limiting hole 2 can be strip-shaped or waist-shaped.

In a typical embodiment, the width of the limiting plate 1 is greater than the width of the bottom plate of the beam body 8 , and the bottom surface of the limiting plate 1 is flat with the bottom surface of the beam body 8 .

In this way, the support strength of the limiting plate 1 to the beam body 8 can be improved, thereby improving the connection effect between the beam body 8 and the bridge pier 9 .

In a typical embodiment, the positioning reinforcement bar 3 is U-shaped as a whole.

In this way, the bent parts at both ends can be better wedged into the beam body 8 .

The material of the positioning steel bars 3 may be concrete steel bars or concrete threaded steel bars, but is not limited thereto.

In a typical embodiment, the positioning steel bar 3 is welded on the limiting plate 1 , and the distance between the welding position and the wide centerline of the limiting plate 1 is less than half the width of the bottom surface of the beam body 8 .

In this way, through the specific welding position, the welding position of the positioning steel bar 3 can be avoided outside the beam body 8, thereby ensuring effective anchoring of the steel bar skeleton of the positioning steel bar 3 and the beam body 8.

In a typical embodiment, it also includes a plate-type rubber bearing 5 that is lined on the bottom surface of the limiting plate 1 .

In this way, the plate-type rubber bearing 5 provides elastic support for the bottom surface of the limiting plate 1 to ensure the deformation function of the bearing under normal use conditions.

The following describes the installation process of the anti-drop beam support:

When making the limit plate, make the limit plate first: dig out the limit hole 2 on the limit plate 1, the diameter of the hole is larger than the diameter of the fixed anchor rod, and the length of the movable gap is smaller than the displacement required for the falling of the supported beam body. The reinforcing bar 3 is bent and welded on the limiting plate 1. After the limit plate is made, the limit plate 1 and the beam body 8 are poured together and placed on the plate rubber support 5 . The width of the limiting plate 1 is greater than the width of the bottom plate of the beam body 8, and the bottom surface of the limiting plate 1 is equal to the bottom surface of the beam body 8.

The grouting pipe 7 is reserved when pouring the pier 9, and the fixed anchor rod 4 is passed through the limit hole 2 and the plate rubber bearing 5 to the substructure 9 and a hardened sealing ring 6 is provided. After fixing, inject mortar into the grouting pipeline 7 for sealing.

When the beam body 8 vibrates, the limiting plate 1 and the beam body 8 vibrate together, and the longitudinal displacement of the beam body is reflected in the longitudinal displacement of the limiting hole 2 . The maximum value of the limit hole 2 is reflected in the slidable length of the limit hole 2. If the longitudinal displacement of the beam body 8 reaches the maximum displacement, the fixed anchor rod 4 will limit the longitudinal displacement of the limit hole 2, further constraining The longitudinal displacement of the limiting plate 1 and the longitudinal displacement of the beam body 8 . In this way, the bridge can be prevented from falling under the premise that the bridge can have a certain sliding length; at the same time, by fixing the anchor rod 4 to limit the lateral displacement and vertical displacement of the bridge, it can prevent the bridge from overturning and further prevent the support from falling off. null.

The above is only a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person familiar with the technical field can easily conceive of changes or changes within the technical scope disclosed in this application Replacement should be covered within the protection scope of this application.

Claims (6)

1. A kind of anti-drop beam support, is characterized in that, is suitable for bridge pier, beam body are fixed, and described anti-fall beam support comprises: A limiting plate, which defines a limiting hole; A fixed anchor rod is passed through the limiting hole in the manner of leaving a movable gap in the longitudinal direction and is anchored inside the pier; A positioning steel bar is used for the limit plate to pass through the beam body. 2. The anti-fall beam support according to claim 1, characterized in that, the overall positioning reinforcement is U-shaped. 3 . The anti-fall beam bearing according to claim 1 , further comprising a plate-type rubber bearing that is lined on the bottom surface of the limiting plate. 4 . 4. The anti-fall beam support according to claim 2, characterized in that, the positioning steel bar is welded on the limiting plate, and the distance between the welding position and the wide center line of the limiting plate is less than the half-width of the bottom surface of the beam body . 5 . The anti-fall beam support according to claim 1 , wherein grouting pipes are reserved for the bridge piers to be sealed after the fixed anchor rods pass through. 6 . 6 . The anti-fall beam support according to claim 1 , wherein the width of the limiting plate is greater than the width of the bottom plate of the beam body, and the bottom surface of the limiting plate is equal to the bottom surface of the beam body. 7 .

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