Bridge body box girder support structure

Abstract

The utility model discloses a bridge body box girder support structure which comprises a support, a friction layer and at least two anchor bolts. A plurality of first blind holes are formed in the bridge pier, the lower ends of the anchor bolts are inserted into the first blind holes and fixedly connected, and the anchor bolts correspond to the first blind holes one to one; a plurality of second blind holes are formed in the lower surface of the support, the upper ends of the anchor bolts are inserted into the second blind holes, gaps are reserved between the upper ends of the anchor bolts and the side walls of the second blind holes, and the anchor bolts correspond to the second blind holes one to one; the friction layer is fixedly arranged on the upper surface of the support and used for increasing friction force in contact with the box girder. According to the utility model, the anchor bolt mounting support is arranged, and the friction layer is arranged on the support, so that the friction force in contact with the box girder is increased, the adaptability to the stress change in the operation process of the bridge and the adaptability to the deformation of the box girder and the pier of the bridge are enhanced, and the reliable connection of the upper structure and the lower structure of the bridge is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a bridge box girder support structure. Background Technology

[0002] Bridge bearings are crucial structural components connecting the superstructure and substructure of a bridge. Located between the bridge deck and the bearing pad, they reliably transfer the loads and deformations borne by the superstructure to the substructure, serving as a vital force transmission device. However, bridges are susceptible to vibrations during operation due to vehicle traffic and crosswinds. Under the influence of vibration and temperature, the box girder and piers of the bridge are prone to deformation, affecting the reliable connection of the bridge bearings to the superstructure and substructure. Furthermore, cement overflow often occurs during the bearing pouring process, resulting in poor casting quality and ultimately affecting the service life of the bearings. Utility Model Content

[0003] This utility model provides a bridge box girder support structure to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A bridge box girder support structure includes: a support, a friction layer, and at least two anchor bolts; multiple first blind holes are provided on the pier, and the lower end of the anchor bolt is inserted into the first blind hole and fixedly connected, with each anchor bolt corresponding to one of the first blind holes; multiple second blind holes are provided on the lower surface of the support, and the upper end of the anchor bolt is inserted into the second blind hole with a gap between it and the side wall of the second blind hole, with each anchor bolt corresponding to one of the second blind holes; the friction layer is fixed on the upper surface of the support and is used to increase the friction force in contact with the box girder.

[0006] Preferably, the upper surface of the friction layer is wavy and / or serrated.

[0007] Preferably, the friction layer is made of a friction material.

[0008] Preferably, the friction layer is bonded and fixed to the support.

[0009] Preferably, plastic cement is filled between the lower end of the anchor bolt and the first blind hole, and between the upper surface of the pier and the lower surface of the support, and the plastic cement fixes the lower end of the anchor bolt to the first blind hole.

[0010] Preferably, plastic cement is poured using a detachable precast steel mold; the detachable precast steel mold includes multiple templates and protective support components corresponding to the multiple templates, the multiple templates are spliced ​​together in sequence and set around the support, and the protective support components support the corresponding templates.

[0011] Preferably, a leak-proof strip is also provided between the template and the pier.

[0012] Preferably, the protective support assembly includes: a protective support plate, a support rod, a support block, and a support friction layer; the protective support plate is disposed on the upper surface of the pier and located on the side of the template away from the support, and the protective support plate abuts against the template; the support block is disposed on the upper surface of the pier and located on the side of the protective support plate away from the support, the support friction layer is located between the support block and the pier, and the support friction layer is fixedly connected to the support block; one end of the support rod is fixedly connected to the protective support plate, and the other end is fixedly connected to the support block.

[0013] Beneficial effects:

[0014] This application discloses a bridge box girder support structure that uses anchor bolts to install the supports and adds a friction layer to the supports to increase the frictional force between the supports and the box girder, thereby enhancing its adaptability to stress changes during bridge operation and to deformation of the bridge box girder and piers. Furthermore, to ensure a reliable connection between the bridge superstructure and substructure, a leak-proof structure is designed during the pouring of plastic cement. This involves setting up and supporting protective support plates, support rods, support blocks, and a supporting friction layer on the outside of the formwork and leak-proof strips to prevent plastic cement from overflowing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the installation position of a bridge box girder support structure disclosed in this utility model;

[0017] Figure 2 This is a structural schematic diagram of a bridge box girder support structure disclosed in this utility model;

[0018] Figure 3 This is a sectional view of a bridge box girder support structure disclosed in this utility model;

[0019] Figure 4 This is a structural schematic diagram of the support and friction layer assembly of a bridge box girder support structure disclosed in this utility model.

[0020] Figure 5 This is a schematic diagram of a detachable prefabricated steel mold for a bridge box girder support structure disclosed in this utility model.

[0021] 1. Box girder; 21. Support; 22. Friction layer; 23. Anchor bolt; 24. Plastic cement; 251. Formwork; 252. Leak-proof strip; 253. Protective support plate; 254. Support rod; 255. Support block; 256. Support friction layer; 7. Pier. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] A bridge box girder support structure, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the structure includes: a support 21, a friction layer 22, and at least two anchor bolts 23; multiple first blind holes are provided on the pier 7, and the lower end of the anchor bolt 23 is inserted into the first blind hole and fixedly connected, with each anchor bolt 23 corresponding to one of the first blind holes; multiple second blind holes are provided on the lower surface of the support 21, and the upper end of the anchor bolt 23 is inserted into the second blind hole with a gap between it and the side wall of the second blind hole, with each anchor bolt 23 corresponding to one of the second blind holes; the friction layer 22 is fixed on the upper surface of the support 21, and the friction layer 22 is used to increase the friction force in contact with the box girder 1. By setting the anchor bolts 23 to install the support 21, and by setting the friction layer 22 on the support 21 to increase the friction force in contact with the box girder 1, the adaptability to stress changes during bridge operation and the adaptability to deformation of the box girder 1 and the pier 7 of the bridge are enhanced, ensuring that the support 21 reliably supports the box girder 1 without relative sliding, and ensuring a reliable connection between the superstructure and substructure of the bridge.

[0024] Preferably, the upper surface of the friction layer 22 is wavy and / or serrated to increase the friction coefficient of the friction layer 22.

[0025] Preferably, the friction layer 22 is made of a friction material, which can significantly increase the friction between the friction layer 22 and the box girder 1.

[0026] Preferably, the friction layer 22 is bonded and fixed to the support 21.

[0027] Preferably, plastic cement 24 is filled between the lower end of the anchor bolt 23 and the first blind hole, and between the upper surface of the pier 7 and the lower surface of the support 21, and the plastic cement 24 fixes the lower end of the anchor bolt 23 to the first blind hole.

[0028] Specifically, when pouring the plastic cement 24, it is ensured that it does not enter the gap between the upper end of the anchor bolt 23 and the side wall of the second blind hole. Because the volume difference between the support 21 and the pier 7 is significant, the expansion of the pier 7 and the anchor bolt 23 after temperature rise can easily damage the support 21, causing it to fail to reliably connect the bridge superstructure and substructure. The gap between the upper end of the anchor bolt 23 and the side wall of the second blind hole can compensate for the expansion of the pier 7 and the anchor bolt 23, preventing damage to the support 21.

[0029] Preferably, the plastic cement 24 is poured using a detachable precast steel mold. The detachable precast steel mold includes multiple templates 251 and corresponding protective support components. The multiple templates 251 are sequentially spliced ​​and arranged around the support 21, with the protective support components supporting the corresponding templates 251. Grouting is performed into the space enclosed by the multiple templates 251, gradually filling the upper surface of the pier 7. The plastic cement 24 then gradually flows between the first blind hole and the lower end of the anchor bolt 23, as well as between the lower surface of the support 21 and the upper surface of the pier 7. After the plastic cement 24 solidifies, it secures the anchor bolt 23 to the pier 7 and the support 21 to the pier 7.

[0030] Preferably, a leak-proof strip 252 is also provided between the template 251 and the pier 7 to prevent grout from flowing out.

[0031] Preferably, the protective support assembly includes: a protective support plate 253, a support rod 254, a support block 255, and a support friction layer 256; the protective support plate 253 is disposed on the upper surface of the pier 7 and located on the side of the template 251 away from the support 21, and the protective support plate 253 abuts against the template 251; the support block 255 is disposed on the upper surface of the pier 7 and located on the side of the protective support plate 253 away from the support 21, the support friction layer 256 is located between the support block 255 and the pier 7, and the support friction layer 256 is fixedly connected to the support block 255; one end of the support rod 254 is fixedly connected to the protective support plate 253, and the other end is fixedly connected to the support block 255.

[0032] 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 this 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 bridge box girder support structure, characterized by, The friction layer (22) is made of friction material. The upper surface of the friction layer (22) is wavy and / or zigzag.

2. The structure of claim 1, wherein The friction layer (22) is adhesively fixed to the support (21).

3. The structure of claim 1, wherein The lower end of the anchor bolt (23) and the first blind hole are filled with plastic cement (24), and the plastic cement (24) fixedly connects the lower end of the anchor bolt (23) and the first blind hole.

4. The structure of claim 3, wherein The plastic cement (24) is poured through a detachable prefabricated steel mold.

5. The structure of claim 1, wherein The mold plate (251) and the bridge pier (7) are further provided with a leakage-proof strip (252).

6. The structure of claim 5, wherein The protective support assembly comprises a protective support plate (253), a support rod (254), a support block (255), and a support friction layer (256); the protective support plate (253) is arranged on the upper surface of the bridge pier (7) and located on the side of the mold plate (251) away from the support (21), and the protective support plate (253) abuts against the mold plate (251); the support block (255) is arranged on the upper surface of the bridge pier (7) and located on the side of the protective support plate (253) away from the support (21), the support friction layer (256) is located between the support block (255) and the bridge pier (7), the support friction layer (256) is fixedly connected with the support block (255); one end of the support rod (254) is fixedly connected to the protective support plate (253), and the other end is fixedly connected to the support block (255).

7. The structure of claim 6, wherein ​ 8. The structure of claim 6, wherein ​

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