Steel box girder overhanging supporting structure suitable for narrow bridge

Abstract

The utility model relates to a steel box girder overhanging supporting structure suitable for a narrow bridge. The steel box girder overhanging supporting structure comprises a steel box girder structure, a supporting system, a support system, a cover beam structure and a limiting device. The steel box girder structure is arranged on the upper portion of the bent cap structure. The supporting systems are arranged on the two sides of the steel box girder structure. The support system is arranged between the supporting system and the bent cap structure; the limiting device is arranged between the steel box girder structure and the bent cap structure. The device is suitable for a steel box girder narrow bridge, and effectively solves the problems of large dead weight, poor economical efficiency, large occupied space, inconvenience in construction, poor aesthetic property and the like in the conventional cross beam mode.

Description

Technical Field

[0001] The utility model belongs to the technical field, in particular to the technical field of a steel box girder outward extension support structure suitable for narrow bridges. Background Art

[0002] In order to improve the bearing capacity and safety of the bridge, piers need to be set in the middle of the bridge. In the steel box girder with a smaller width, there are problems in the placement of the support: if a single support is used, the bridge's anti-overturning stability is very poor, and if a double support is used, the support spacing will be insufficient. The existing solution is to make a cap beam on the top of the pier column, and the main beam as a cross beam, and the cross beam is connected to the cap beam, such as Figure 4 .

[0003] The existing technology increases the support installation spacing by making a cap beam on the top of the pier and the main beam as a cross beam, but there are the following problems: 1. The cross beam and the cap beam are too long and the aesthetics is poor; 2. The block cross bridge extends outward and occupies a large space; 3. The cross beam and the cap beam are large in size and heavy in weight, which also leads to the pier requiring a larger cross-sectional size to reduce stress, which not only increases investment but also brings difficulties to construction. Summary of the invention

[0004] The utility model is to solve the above problems and defects and provide a steel box girder outrigger support structure suitable for narrow bridges. The utility model aims to provide a transverse outrigger support device for steel bridges to solve the problems of traditional support methods such as poor economy, inconvenient construction, large space occupation, poor aesthetics, etc.

[0005] The utility model is implemented by the following technical solution.

[0006] A steel box girder outrigger support structure suitable for narrow bridges, comprising a steel box girder structure, a support system, a bearing system, a cap beam structure and a limiting device;

[0007] The steel box beam structure is arranged on the upper part of the cap beam structure;

[0008] The support system is arranged on both sides of the steel box girder structure;

[0009] The support system is arranged between the support system and the cap beam structure;

[0010] The limiting device is arranged between the steel box beam structure and the cap beam structure.

[0011] Furthermore, the steel box girder structure 10 of the utility model specifically includes a bottom plate 11, a web plate 12, an inclined web plate 13, a top plate 14, and a side plate 17 which are fixedly connected to each other;

[0012] The bottom plate 11 and the top plate 14 are arranged horizontally and in parallel;

[0013] One end of the web 12 is vertically fixed at the end of the bottom plate 11, and the other end is vertically fixed at the middle area of ​​the top plate 14;

[0014] One end of the inclined web plate 13 is fixedly connected to the end of the bottom plate 11, and the other end is fixedly connected to the top plate 14 through the side plate 17;

[0015] The transverse partition 16 is disposed between the side plate 17 and the web plate 12 ; the transverse partition 16 is vertically fixedly connected to the web plate 12 .

[0016] Furthermore, the steel box girder structure 10 of the present invention further includes stiffening ribs 15 , and the stiffening ribs 15 are respectively vertically fixed on the bottom plate 11 , the inclined web plate 13 , and the top plate 14 .

[0017] Furthermore, the support system of the utility model includes a support steel plate 21, a first longitudinal stiffening plate 22, a second longitudinal stiffening plate 23, and a diagonal brace 24;

[0018] The support steel plate 21 is fixedly connected to the bottom plate 11 in a horizontal direction outwardly along the bottom plate 11;

[0019] One end of the diagonal brace 24 is fixedly connected to the supporting steel plate 21, and the other end is fixedly connected to the diagonal web 13; the diagonal brace 24, the supporting steel plate 21 and a part of the diagonal web 13 form an obtuse triangle;

[0020] A first longitudinal stiffening plate 22 is vertically arranged upward in the middle area of ​​the supporting steel plate 21;

[0021] One end of the first longitudinal stiffening plate 22 is fixedly connected to the supporting steel plate 21, and the other end is fixedly connected to the inclined web 13;

[0022] A second longitudinal stiffening plate 23 is vertically arranged between the inclined web plate 13 and the top plate 14;

[0023] One end of the second longitudinal stiffening plate 23 is fixedly connected to the inclined web 13, and the other end is fixedly connected to the inclined web 13.

[0024] The top plate 14 is fixedly connected.

[0025] Furthermore, the support system of the utility model further includes a first transverse stiffening plate 25 and a second transverse stiffening plate 26;

[0026] The first transverse stiffening plate 25 is fixedly arranged in the area formed by the supporting steel plate 21, the first longitudinal stiffening plate 22 and the inclined web 13;

[0027] The second transverse stiffening plate 26 is fixedly disposed in the area formed by the supporting steel plate 21 , the diagonal brace 24 , the diagonal web 13 and the first longitudinal stiffening plate 22 .

[0028] Furthermore, the support system of the utility model includes a support 40, a support upper steel plate 41, and a support lower steel plate 42;

[0029] The support upper steel plate 41 is fixedly arranged on the upper part of the support 40 and is in contact and connected with the supporting steel plate 21;

[0030] The support lower steel plate 42 is fixedly disposed at the lower portion of the support 40 and is in contact with and connected to the cap beam structure.

[0031] Furthermore, the limiting device of the utility model includes a rectangular block fixedly mounted on the cap beam structure, a limiting stiffening plate 52 vertically arranged at the lower part of the base plate 11 corresponding to the upper part of the rectangular block, and a limiting steel plate 51 fixedly arranged on the inner side of the limiting stiffening plate 52.

[0032] Furthermore, in the present invention, a rubber plate 53 is fixedly disposed inside the limiting steel plate 51 .

[0033] Furthermore, the position limiting stiffening plates 52 of the present invention are arranged in four pieces, forming a rectangle that matches the rectangular blocks on the cap beam structure.

[0034] Furthermore, the material of the cap beam structure of the utility model is steel or concrete.

[0035] The beneficial effects of the utility model are:

[0036] 1. The utility model solves the problem of support installation in a narrow bridge structure without a crossbeam, reduces the weight of the upper structure, and has good economic efficiency;

[0037] 2. The supporting device does not change the original steel box girder steel plate, but only adds a steel plate, which makes the construction simple, convenient and efficient.

[0038] 3. The supporting structure is consistent with the cap beam and uses hidden blocks, which does not affect the landscape effect of the steel structure bridge;

[0039] 4. The support reaction force is transmitted to the bottom plate 11, the cross beam and the top plate 14 at the same time, so as to reduce stress concentration, improve the force bearing performance and the structural stability.

[0040] The utility model is further explained below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a cross-sectional view of the bridge of the present utility model.

[0042] Figure 2 It is an elevation view of the utility model.

[0043] Figure 3 It is a plan view of the bridge limiting system of the utility model.

[0044] Figure 4 It is a schematic diagram of the prior art structure that the utility model is directed to.

[0045] In the figure, 10 is a steel box girder structure, 11 is a bottom plate, 12 is a web plate, 13 is an inclined web plate, 14 is a top plate, 15 is a stiffening rib, 16 is a transverse diaphragm, 17 is a side plate, 21 is a supporting steel plate, 22 is a first longitudinal stiffening plate, 23 is a second longitudinal stiffening plate, 24 is an oblique brace, 25 is a first transverse stiffening plate, 26 is a second transverse stiffening plate, 30 is a concrete cap beam, 31 is a pier column, 40 is a support, 41 is a steel plate on the support, 42 is a steel plate on the support, 50 is a rectangular concrete block, 51 is a limiting steel plate, 52 is a limiting stiffening plate, and 53 is a rubber plate. DETAILED DESCRIPTION

[0046] The following embodiments are only a part of the technical solution of the present utility model, and are not intended to limit the entire technical solution of the present utility model. The embodiments of the present utility model are provided to further explain and illustrate the details of the technical solution of the present utility model.

[0047] See Figure 1 , Figure 2 , Figure 3 shown.

[0048] The invention discloses a steel box girder outward extension support structure suitable for narrow bridges, which mainly consists of a support system, a steel box girder structure, a support system, a cap beam structure and a limit device.

[0049] A steel plate is added laterally to the bottom plate 11 and reinforcement measures are taken. The linear shape of both sides of the concrete cap beam is consistent with the supporting diagonal braces 24. The support system supports the steel box beam 10. Limiting devices are set at the bottom of the steel box beam and the top of the concrete cap beam to limit the longitudinal and lateral displacement of the steel box beam 10.

[0050] The utility model adds a supporting steel plate 21 transversely to the bottom plate 11 of the steel box beam 10, and the first longitudinal stiffening plate 22 is connected with the inclined web 13 and the supporting steel plate 21.

[0051] The supporting system is composed of a supporting steel plate 21 , a first longitudinal stiffening plate 22 , a second longitudinal stiffening plate 23 , a diagonal brace 24 , a first transverse stiffening plate 25 , and a second transverse stiffening plate 26 .

[0052] The second longitudinal stiffening plate 23 is connected to the inclined web 13 and the top plate 14 and is on the same plane as the first longitudinal stiffening plate 22 . The diagonal brace 24 connects the supporting steel plate 21 and the inclined web 13 . A stiffening rib 15 is provided on the inner side of the inclined web 13 at the intersection with the diagonal brace 24 .

[0053] The first transverse stiffening plate 25 and the second transverse stiffening plate 26 are installed between the supporting steel plate 21 and the inclined web plate 13 , while ensuring that they are in the same plane as the transverse diaphragm 16 .

[0054] The steel box girder 10 is composed of a bottom plate 11 , a web plate 12 , an inclined web plate 13 , a top plate 14 , stiffening ribs 15 , and a transverse diaphragm 16 .

[0055] The support system consists of a support 40 , a support upper steel plate 41 and a support lower steel plate 42 .

[0056] The lines on both sides of the concrete cap beam 30 are consistent with the lines of the diagonal braces 24, ensuring the aesthetics of the bridge.

[0057] A raised rectangular concrete block 50 is made in the center of the concrete cap beam, and a limiting steel plate 51 is welded in the center of the box beam. The limiting steel plate 51 is arranged in a square shape, and a rubber plate 53 is attached to the inner side of the limiting steel plate 51 for buffering effect.

[0058] The rectangular concrete block 50, the limiting steel plate 51, the limiting stiffening plate 52 and the rubber plate 53 constitute a limiting device, which can simultaneously limit the longitudinal and lateral displacements of the bridge.

[0059] Another support setting device in the transverse direction of the bridge is symmetrically arranged with the device.

[0060] 1. The structural type of the steel beam can be multi-chamber;

[0061] 2. The cap beam structure at the bottom can be a steel structure or a concrete structure;

[0062] 3. This device is also suitable for wide bridge structures;

[0063] The above is only a specific embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A steel box girder outrigger support structure suitable for narrow bridges, characterized in that: It includes a steel box girder structure (10), a support system, a bearing system, a cap beam structure and a limiting device; The steel box beam structure is arranged on the upper part of the cap beam structure; The support system is arranged on both sides of the steel box girder structure; The support system is arranged between the support system and the cap beam structure; The limiting device is arranged between the steel box beam structure and the cap beam structure.

2. The steel box girder outrigger support structure suitable for narrow bridges according to claim 1, characterized in that: The steel box girder structure (10) specifically comprises a bottom plate (11), a web plate (12), an inclined web plate (13), a top plate (14), and a side plate (17) which are fixedly connected to each other; The bottom plate (11) and the top plate (14) are arranged horizontally and in parallel; One end of the web (12) is vertically fixedly arranged at the end of the bottom plate (11), and the other end is vertically fixedly arranged in the middle area of ​​the top plate (14); One end of the inclined web plate (13) is fixedly connected to the end of the bottom plate (11), and the other end is fixedly connected to the top plate (14) via a side plate (17); The transverse partition (16) is arranged between the side plate (17) and the web plate (12); the transverse partition (16) is vertically fixedly connected to the web plate (12).

3. The steel box girder outrigger support structure suitable for narrow bridges according to claim 2, characterized in that: The steel box girder structure (10) further comprises stiffening ribs (15), wherein the stiffening ribs (15) are respectively vertically fixedly arranged on the bottom plate (11), the inclined web plate (13), and the top plate (14).

4. The steel box girder outrigger support structure suitable for narrow bridges according to claim 2, characterized in that: The support system comprises a support steel plate (21), a first longitudinal stiffening plate (22), a second longitudinal stiffening plate (23), and a diagonal brace (24); The supporting steel plate (21) is arranged horizontally outwardly from the bottom plate (11) and fixedly connected to the bottom plate (11); One end of the diagonal brace (24) is fixedly connected to the supporting steel plate (21), and the other end is fixedly connected to the diagonal web plate (13); the diagonal brace (24), the supporting steel plate (21) and a portion of the diagonal web plate (13) form an obtuse triangle; A first longitudinal stiffening plate (22) is arranged vertically upward in the middle region of the supporting steel plate (21); One end of the first longitudinal stiffening plate (22) is fixedly connected to the supporting steel plate (21), and the other end is fixedly connected to the inclined web plate (13); A second longitudinal stiffening plate (23) is vertically arranged between the inclined web plate (13) and the top plate (14); One end of the second longitudinal stiffening plate (23) is fixedly connected to the inclined web plate (13), and the other end is fixedly connected to the inclined web plate (13). The top plate (14) is fixedly connected.

5. The steel box girder outrigger support structure suitable for narrow bridges according to claim 4, characterized in that: The support system further comprises a first transverse stiffening plate (25) and a second transverse stiffening plate (26); The first transverse stiffening plate (25) is fixedly arranged in the area formed by the supporting steel plate (21), the first longitudinal stiffening plate (22) and the inclined web plate (13); The second transverse stiffening plate (26) is fixedly arranged in an area formed by the supporting steel plate (21), the diagonal brace (24), the diagonal web plate (13) and the first longitudinal stiffening plate (22).

6. The steel box girder outrigger support structure suitable for narrow bridges according to claim 5, characterized in that: The support system comprises a support (40), a support upper steel plate (41), and a support lower steel plate (42); The support upper steel plate (41) is fixedly arranged on the upper part of the support (40) and is in contact with and connected to the supporting steel plate (21); The support lower steel plate (42) is fixedly arranged at the lower part of the support (40) and is in contact with and connected to the cap beam structure.

7. The steel box girder outrigger support structure suitable for narrow bridges according to claim 1, characterized in that: The limiting device comprises a rectangular block fixedly arranged on the cap beam structure, a limiting stiffening plate (52) vertically arranged at the lower part of the bottom plate (11) corresponding to the upper part of the rectangular block, and a limiting steel plate (51) fixedly arranged inside the limiting stiffening plate (52).

8. The steel box girder outrigger support structure suitable for narrow bridges according to claim 7, characterized in that: A rubber plate (53) is fixedly arranged on the inner side of the limiting steel plate (51).

9. A steel box girder outrigger support structure suitable for narrow bridges according to claim 7 or 8, characterized in that: The limiting stiffening plates (52) are arranged in four pieces, forming a rectangle that matches the rectangular blocks on the cap beam structure.

10. The steel box girder outrigger support structure suitable for narrow bridges according to claim 1, characterized in that: The material of the cap beam structure is steel or concrete.

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