Prepressing counter-force structure of continuous rigid frame bridge

Abstract

The utility model relates to the technical field of counter-force frames, in particular to a pre-pressing counter-force structure of a continuous rigid frame bridge, which comprises a pier body, a counter-force frame is arranged on the pier body, the counter-force frame is connected with the pier body through a connecting rod, the counter-force frame comprises a plurality of upper chords and lower chords which are arranged in parallel, the upper chords are connected with the adjacent lower chords through inclined rods, and the upper chords are connected with the lower chords through inclined rods. Spandrel girders are arranged on the two sides of the pier body, the lower chord is connected with the spandrel girders through jacks, brackets are installed on the two sides of the pier body, and the brackets are connected with the spandrel girders; bending force borne by the upper chord and the lower chord is converted into axial pulling and pressing force through the inclined rods, the overall deformation of the reaction frame can be reduced, and the observation accuracy of the deformation of the bracket is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction frames, in particular to a preloading reaction structure for a continuous rigid frame bridge. Background Art

[0002] At present, for similar triangular bracket preloading reaction structure devices in engineering, the reaction frame is usually in the form of a simply supported beam with two-point loading. Under the action of the jack thrust, the reaction frame may undergo bending deformation, thus affecting the deformation observation of the lower bracket.

[0003] A continuous rigid frame bridge closure segment jacking reaction frame structure with the application number CN201610721646.8 discloses a structure including steel box girder transverse connecting plates on the upper and lower surfaces of the steel box girder. Embedded steel plates are arranged at the left and right ends of the steel box girder and inside the concrete of the box girder at the closure joint segment; the embedded steel plates are connected to the end embedded anchor bars. End vertical stiffening plates and end transverse stiffening plates are arranged at the left and right ends of the steel box girder. Among them, the end vertical stiffening plate and end transverse stiffening plate at the left end are connected to the embedded steel plate, and the end vertical stiffening plate and end transverse stiffening plate at the right end are connected to the jacking end steel plate; the right end of the steel box girder is connected to the jacking end steel plate, and a jacking jack is arranged on the end plane plate; a steel box girder vertical bracing and a steel box girder vertical shear brace are connected between the upper and lower steel box girders. For the structure it discloses, it is still inconvenient to observe the deformation of the bracket. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: when the reaction frame deforms under external force, it is inconvenient to observe the settlement of the lower bracket.

[0005] To solve the above technical problem, the present invention adopts the following technical solutions:

[0006] Firstly, a preloading reaction structure for a continuous rigid frame bridge is provided, including a pier body. A reaction frame is installed on the pier body. The reaction frame is connected to the pier body through a connecting rod. The reaction frame includes several parallel upper chords and lower chords. The upper chords are connected to adjacent lower chords through diagonal rods. Bearing beams are arranged on both sides of the pier body. The lower chords are connected to the bearing beams through jacks. Brackets are installed on both sides of the pier body, and the brackets are connected to the bearing beams.

[0007] The bending external force received by the lower chord is converted into an axial force through the diagonal rod, thereby reducing the overall deformation of the reaction frame and preventing the deformation of the reaction frame from affecting the deformation of the bracket, making the observed deformation of the bracket more accurate.

[0008] Further, a distribution beam is arranged between the jack and the bearing beam; the acting force of the jack is transmitted to the bearing beam by using the distribution beam to ensure that the force between each bearing beam is more uniform during the transmission process.

[0009] Furthermore, a steel pad is provided between the distribution beam and the jack; the steel pad is used to reduce the pressure between the jack and the distribution beam, ensuring the stable use of this structure.

[0010] Furthermore, the upper chord is connected to the corresponding lower chord through a vertical rod; the vertical rod is used to strengthen the connection between the upper chord and the lower chord.

[0011] Furthermore, a cushion beam is provided on the upper chord, and the cushion beam is connected to the connecting rod by bolts.

[0012] Furthermore, the connecting rod is embedded in the pier body.

[0013] Furthermore, the upper chord and the lower chord are composed of double 40b I-beams.

[0014] Furthermore, the diagonal rod is composed of 40b I-beam.

[0015] Furthermore, the connecting rod is composed of PSB930 high-strength threaded steel.

[0016] Furthermore, the connection between the bracket and the load-bearing beam is an observation point.

[0017] The utility model has the following beneficial effects: by means of the diagonal rod, the bending force received by the upper and lower chords is transformed into axial tension and compression forces, which can reduce the overall deformation of the reaction frame and improve the accuracy of observing the deformation of the bracket; at the same time, the setting of the vertical rod and the diagonal rod also makes the overall structure of the reaction frame more stable, preventing the deformation of the reaction frame from affecting the deformation of the bracket, making the stability of this device higher. At the same time, this structure is simple, low in cost and convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0019] Figure 1 is the structural schematic diagram of this embodiment;

[0020] Figure 2 is Figure 1 the left view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to better explain the present utility model for easy understanding, the following will make a detailed description of the present utility model through specific embodiments in conjunction with the drawings.

[0022] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The utility model provides a pre-compression reaction force structure of a continuous rigid frame bridge, such as Figure 1 and Figure 2 As shown, it includes a pier body 1, a connecting rod 2 is embedded in the pier body 1, a reaction frame is installed at the position of the pier body 1 corresponding to the connecting rod 2, the reaction frame includes several upper chords 3 arranged in parallel, lower chords 4 are arranged below the upper chords 3, the connecting rods 2 pass through the upper and lower chords, the connecting rods 2 fix the reaction frame on the pier body 1, the upper chords 3 are connected to the adjacent lower chords 4 through the inclined rods 5, and through the action of the inclined rods 5, the upper and lower chords can be converted into axial tension when subjected to bending external force, thereby effectively avoiding deformation of the entire reaction frame.

[0026] Distribution beams 6 are arranged at positions corresponding to the lower chord 4 on both sides of the pier body 1. The distribution beam 6 is connected to the lower chord 4 by a jack 7. A load-bearing beam 8 is arranged below the distribution beam 6 to support the distribution beam 6. The extension of the jack 7 can provide an upward bending external force to the entire reaction frame. Since the reaction frame is connected to the pier body 1 through the connecting rod 2 and the force is mutual, the jack 7 also has a force acting on the distribution beam 6 at this time, and then it is transmitted to the load-bearing beam 8 through the distribution beam 6. Since a bracket 9 is generally installed on the load-bearing beam 8, the reaction force is transferred to the bracket 9, thereby achieving a pre-stressing effect. The connection between the bracket 9 and the load-bearing beam 8 is an observation point 10, through which the deformation of the bracket 9 can be observed.

[0027] Since the reaction frame converts the bending external force into axial tension through the diagonal bars during use, the overall deformation of the reaction frame is small at this time, thereby reducing the influence of the deformation of the reaction frame on the deformation of the bracket 9 and ensuring that the observed deformation of the bracket 9 is more accurate.

[0028] A cushion steel 11 is provided at the connection between the jack 7 and the distribution beam 6 to reduce the pressure between the jack 7 and the distribution beam 6.

[0029] A cushion beam 12 is provided on the upper chord 3 to ensure that the parallel upper and lower chords are horizontally consistent, and the upper chord 3 and the lower chord 4 are connected by a vertical rod 13 to increase the connection brightness.

[0030] To ensure the service life and strength, the upper and lower chords are composed of double 40b I-beams, the diagonal bars 5 and the vertical rods 13 are composed of 40b I-beams, the cushion beam 12 is composed of double 40b I-beams, the connecting rod 2 is PSB930 high-strength threaded steel, and the cushion beam 12 is connected to the connecting rod 2 by bolts.

[0031] It should be understood that the above description of the specific embodiments of the present invention is only for explaining the technical route and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present invention should be covered by the protection scope of the present invention.

Claims

1. A preload reaction structure of a continuous rigid frame bridge, characterized in that: The invention comprises a pier body (1), a reaction frame is installed on the pier body (1), the reaction frame is connected to the pier body (1) through a connecting rod (2), the reaction frame comprises a plurality of upper chords (3) and lower chords (4) arranged in parallel, the upper chord (3) is connected to the adjacent lower chord (4) through an inclined rod (5), load-bearing beams (8) are arranged on both sides of the pier body (1), the lower chord (4) is connected to the load-bearing beam (8) through a jack (7), and brackets (9) are installed on both sides of the pier body (1), and the brackets (9) are connected to the load-bearing beam (8).

2. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 1, characterized in that: A distribution beam (6) is arranged between the jack (7) and the load-bearing beam (8).

3. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 2, characterized in that: A steel pad (11) is provided between the distribution beam (6) and the jack (7).

4. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 1, characterized in that: The upper chord (3) is connected to the corresponding lower chord (4) via a vertical rod (13).

5. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 1, characterized in that: A cushion beam (12) is provided on the upper chord (3), and the cushion beam (12) is connected to the connecting rod (2) via bolts.

6. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 1, characterized in that: The connecting rod (2) is pre-buried in the pier body (1).

7. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 1, characterized in that: The upper chord (3) and the lower chord (4) are composed of double 40b I-beams.

8. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 1, characterized in that: The diagonal rod (5) is composed of 40b I-beam.

9. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 1, characterized in that: The connecting rod (2) is made of PSB930 high-strength threaded steel.

10. The pre-compression reaction force structure of a continuous rigid frame bridge according to claim 1, characterized in that: The connection point between the bracket (9) and the load-bearing beam (8) is an observation point (10).

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