Widening rib for bridge flange and widened bridge

Abstract

The utility model provides a widening rib for bridge flange and widening bridge, the cross section of widening rib is T-shaped, the widening rib comprises a wing plate and a rib plate, the wing plate comprises a web plate connecting part, an extension part and a flange widening part, the web plate connecting part is used for connecting with the outer side of the web plate of the existing girder, the extension part is connected between the web plate connecting part and the flange widening part, and the flange widening part is used for widening the flange. The flange widening part is used for being connected with the flange end of the existing main beam, the flange widening part extends out of the flange end of the existing main beam in the extending direction of the flange widening part, the rib plate is arranged on the inner side of the wing plate, and the height of the rib plate is gradually reduced from the web connecting part of the wing plate to the flange widening part. The widened rib arranged in this way is simple in structure and light in self weight, factory prefabrication can be adopted, the widened rib is different from a widened structure in the prior art, the field operation time is short, the construction convenience and economical efficiency are greatly improved, the prefabricated widened rib can better guarantee the construction quality of the widened structure, the whole widened rib can be installed in a hoisting mode, and the construction cost is reduced. The construction process is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of bridges, in particular to a widened rib used for a bridge flange and a widened bridge. Background Art

[0002] In recent years, in line with the development of highway traffic, road reconstruction and expansion projects have gradually increased, and the expansion and upgrading of existing bridge structures has become a key node issue. At present, the method for expanding the capacity of existing bridges is usually to widen the bridge flange to avoid demolishing and rebuilding the existing main beam as much as possible.

[0003] In the prior art, the method for widening and expanding the existing main beam structure usually adopts the method of adding concrete or steel structure supports to the bridge flange and bridge web. This requires embedding reinforcement over a large area of ​​the existing structure, which makes the construction of the entire widened structure complicated, the construction quality is difficult to control, and the cost is high.

[0004] In view of this, it is necessary to propose a widened rib for a bridge flange and a widened bridge to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of the utility model is to provide a widening rib for a bridge flange, so as to solve the problems in the prior art that the widening structure of the bridge is complex to construct and the construction quality is difficult to control.

[0006] To achieve the above-mentioned purpose, the utility model provides a widening rib for a bridge flange, wherein the cross section of the widening rib is T-shaped, and the widening rib comprises a wing plate and a rib plate; wherein:

[0007] The wing plate includes a web connecting portion, an extension portion and a flange widening portion, wherein the web connecting portion is used to connect to the outer side of the web of the existing main beam, the extension portion is connected between the web connecting portion and the flange widening portion, the flange widening portion is used to connect to the flange end of the existing main beam, and the flange widening portion extends out of the flange end of the existing main beam along its own extension direction;

[0008] The rib plate is arranged on the inner side of the wing plate, and the height of the rib plate is gradually reduced from the web connecting portion of the wing plate toward the flange widening portion.

[0009] Preferably, the web connecting portion of the wing plate is arranged in an inclined shape downward from the top toward the web of the existing main beam.

[0010] Preferably, the extension portion is arranged to be inclined upward from the web connecting portion toward the flange widening portion, and the flange widening portion is arranged horizontally.

[0011] Preferably, it further comprises a prefabricated anchor block, which is protruding from the widened portion of the flange of the wing plate and is arranged away from the flange end of the existing main beam.

[0012] Preferably, it also includes a pre-installation block and a plurality of shear steel bars, wherein the pre-installation block is fixed on the flange widening portion of the wing plate and is arranged between the prefabricated anchor block and the flange end of the existing main beam, the bottom of the shear steel bar is embedded in the pre-installation block, and the plurality of shear steel bars are arranged at intervals along the extension direction of the pre-installation block.

[0013] Preferably, the prefabricated anchor block is in a rectangular parallelepiped shape, and the width of the prefabricated anchor block is consistent with the width of the web connecting portion.

[0014] Preferably, a plurality of shear key protrusions are formed on the web connecting portion, and the plurality of shear key protrusions are arranged at intervals along the extending direction of the web connecting portion.

[0015] Preferably, a prefabricated channel extending in the transverse direction of the bridge is provided in the prefabricated anchor block.

[0016] Preferably, the number of the shear key protrusions is five, and the five shear key protrusions are arranged at intervals along the extension direction of the web connecting portion.

[0017] The present application also provides a widened bridge, comprising an existing main beam, wherein the existing main beam is a box beam, and also comprises a widened rib for the bridge flange as described above, wherein the web connecting portion of the widened rib is connected to the outer side of the web of the existing main beam, and the flange widening portion of the widened rib is connected to the flange end of the existing main beam.

[0018] Compared with the prior art, the utility model provides the following beneficial effects:

[0019] The utility model provides a widening rib for a bridge flange, wherein the cross section of the widening rib is T-shaped, the widening rib comprises a wing plate and a rib plate, the wing plate comprises a web connecting portion, an extension portion and a flange widening portion, the web connecting portion is used to connect with the outer side of the web of an existing main beam, the extension portion is connected between the web connecting portion and the flange widening portion, the flange widening portion is used to connect with the flange end of the existing main beam, the flange widening portion is arranged to extend out of the flange end of the existing main beam along its own extension direction, the rib plate is arranged on the inner side of the wing plate, and the height of the rib plate is gradually reduced from the web connecting portion of the wing plate toward the flange widening portion. The widening rib thus arranged is simple in structure and light in weight, and can be prefabricated in advance in a factory, which is different from the widening structure in the prior art in that the on-site operation time is short, greatly improving the convenience and economy of construction, and the prefabricated widening rib can better guarantee the construction quality of the widening structure, the entire widening rib can be installed by hoisting, the construction process is simple, and the construction speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional schematic diagram of a widened rib in one embodiment of the utility model;

[0022] Figure 2 It is a schematic elevation view of a widened rib in one embodiment of the utility model;

[0023] Figure 3 It is a side view of a widened rib in one embodiment of the utility model;

[0024] Figure 4 The present invention is a schematic diagram of an application scenario of the overall structure in one embodiment of the present invention.

[0025] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0026] Description of Figure Numbers:

[0027] 10. Wing plate; 110. Web plate connection; 111. Shear key protrusion; 120. Extension; 130. Flange widening; 140. Prefabricated anchor block; 141. Prefabricated channel; 150. Pre-installation block; 160. Shear reinforcement; 20. Rib plate; 30. Existing main beam; 310. Flange end. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present utility model 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" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] Please see attached Figure 1-4 In one embodiment of the present invention, a widening rib for a bridge flange is provided, which is specifically as follows:

[0033] The widened rib has a T-shaped cross section, and includes a wing plate 10 and a rib plate 20, wherein the wing plate 10 includes a web connection portion 110, an extension portion 120 and a flange widening portion 130, the web connection portion 110 is used to connect with the outer side of the web of the existing main beam 30, the extension portion 120 is connected between the web connection portion 110 and the flange widening portion 130, the flange widening portion 130 is used to connect with the flange end 310 of the existing main beam 30, and the flange widening portion 130 extends out of the flange end 310 of the existing main beam 30 along its own extension direction; the rib plate 20 is arranged on the inner side of the wing plate 10, and the height of the rib plate 20 is gradually reduced from the web connection portion 110 of the wing plate 10 toward the flange widening portion 130.

[0034] Specifically, the T-shaped section can save the amount of concrete without reducing the bearing capacity of the section, so as to reduce the deadweight and increase the spanning capacity. Usually, the T-shaped section includes a flange 10 and a rib 20. The flange 10 is used to fit with the existing main beam 30, so as to serve as a connecting surface. In the present application, the flange 10 is bent, and specifically includes a web connecting portion 110, an extension portion 120 and a flange widening portion 130. The web connecting portion 110 is used to connect the entire widened rib to the outer side of the web of the existing main beam 30. The flange widening portion 130 is used as the widened section of the bridge flange, serving as the load-bearing part after the bridge is widened, and the extension portion 120 is used to extend the flange widening portion 130 to the widened position (i.e., the flange end 310 of the existing main beam 30), so it is connected between the web connection portion 110 and the flange widening portion 130; and the rib plate 20 serves as the main load-bearing part of the entire widened rib to ensure structural stability, and its height becomes smaller as it is closer to the flange widening portion 130 to avoid excessive self-weight of the flange end 310 of the bridge after widening.

[0035] As a preferred embodiment of the present invention, the web connecting portion 110 of the wing plate 10 is arranged to be inclined downward from the top toward the web of the existing main beam 30 .

[0036] It should be noted that in bridge applications with a larger deck width, a box girder with a large cantilever inclined web is usually used. For the embodiment of a box girder bridge with an inclined web, the present application can also set the web connection portion 110 of the wing plate 10 to a matching inclined structure, that is, the web connection portion 110 of the wing plate 10 is inclined downward from the top toward the web of the existing main beam 30, so that it can fit smoothly during connection, improve the connection stability, and facilitate construction; preferably, the rib 20 located at the web connection portion 110 is also arranged in a matching inclined shape.

[0037] As a preferred embodiment of the present invention, the extension portion 120 is arranged to be inclined upward from the web connecting portion 110 toward the flange widening portion 130, and the flange widening portion 130 is arranged horizontally.

[0038] It should be noted that, considering that in the bridge application embodiment of the box beam, the height of the flange plate part of the box beam will gradually decrease as it approaches the end, the extension portion 120 is tilted upward toward the flange widening portion 130, so as to avoid the extension portion 120 and the flange end 310 of the existing main beam 30 being too large. At the same time, the flange widening portion 130 can be extended to a height range that matches the flange end 310 of the existing main beam 30 to facilitate construction and connection; further, in order to facilitate subsequent construction and installation, pouring of concrete structure layers, laying of widened bridge decks, etc., the flange widening portion 130 is arranged horizontally.

[0039] As a preferred embodiment of the present invention, a prefabricated anchor block 140 is further included. The prefabricated anchor block 140 is protruded on the flange widening portion 130 of the wing plate 10 and is arranged away from the flange end 310 of the existing main beam 30 .

[0040] It is worth noting that, when connected with the existing main beam 30, the prefabricated anchor block 140 is used to anchor one end of the prestressed steel bundle to form a connection system of the flange end 310 of the existing main beam 30 to enhance the structural integration strength.

[0041] As a preferred embodiment of the utility model, it also includes a pre-installation block 150 and a plurality of shear steel bars 160. The pre-installation block 150 is fixed on the flange widening portion 130 of the wing plate 10 and is arranged between the prefabricated anchor block 140 and the flange end 310 of the existing main beam 30. The bottom of the shear steel bar 160 is pre-embedded in the pre-installation block 150, and the plurality of shear steel bars 160 are arranged at intervals along the extension direction of the pre-installation block 150.

[0042] It is worth noting that the shear steel bars 160 extend vertically to improve the shear resistance of the connection at the flange end 310 of the existing main beam 30, so as to form an effective connection after pouring and bear the force together, and the pre-installation block 150 is used for the installation of the shear steel bars 160, so that the bottom of the shear steel bars 160 can be arranged in the pre-installation block 150 in advance during prefabrication, thereby greatly reducing the construction process and ensuring the construction quality of the widened structure through prefabrication; optionally, the number of the shear steel bars 160 can be set by technicians skilled in the art according to the length of the pre-installation block 150 and the adjacent spacing distance.

[0043] Furthermore, the prefabricated anchor block 140 is in a rectangular parallelepiped shape, and the width of the prefabricated anchor block 140 is consistent with the width of the web connecting portion 110 .

[0044] It should be noted that the rectangular prefabricated anchor block 140 is easy to construct and can be easily prefabricated by matching the width of the widened rib.

[0045] Furthermore, a plurality of shear key protrusions 111 are formed on the web connecting portion 110 , and the plurality of shear key protrusions 111 are arranged at intervals along the extending direction of the web connecting portion 110 .

[0046] It should be understood that setting a shear key at the web connection position of the existing main beam 30 can improve the shear resistance of the interface. Therefore, in the application of the bridge embodiment with shear keys, a plurality of shear key protrusions 111 are also formed on the web connection portion 110 to correspond to the shear key grooves on the bridge web. After installation, the shear key protrusions 111 and the shear wall grooves are matched and embedded to form shear keys.

[0047] Furthermore, a prefabricated channel 141 extending in the transverse direction of the bridge is provided in the prefabricated anchor block 140 .

[0048] It should be noted that the prefabricated channel 141 is used for the prestressed steel strand to be anchored and penetrated, and can be preset in advance during prefabrication to simplify the construction process.

[0049] Furthermore, the number of the shear key protrusions 111 is five, and the five shear key protrusions 111 are arranged at intervals along the extension direction of the web connecting portion 110 .

[0050] It should be noted that the number of the shear key protrusions 111 can be set according to the size of the web connection portion 110, and can also be set accordingly according to the size of the corresponding shear key groove. In the present application as a preferred embodiment, the number of the shear key protrusions 111 is five.

[0051] The present application also provides a widened bridge, including an existing main beam 30, wherein the existing main beam 30 is a box beam, and also includes a widened rib for the bridge flange as described above, wherein the web connecting portion 110 of the widened rib is connected to the outer side of the web of the existing main beam 30, and the flange widening portion 130 of the widened rib is connected to the flange end 310 of the existing main beam 30.

[0052] It is understandable that when a widened bridge system is to be formed, a plurality of widened ribs for bridge flanges can be arranged along the direction of the bridge. When connecting, different connectors can be used for installation and connection. For example, a high-strength bolt connection method can be used. By opening a plurality of through holes in the web connection part 110 of the widened rib, the web connection part 110 of the widened rib and the outer side of the web of the existing main beam 30 are connected by high-strength bolts. Such a connection method is easy to operate, the construction process is simple, and there is less interference with the existing structure. Alternatively, a steel wire connection method can be used, in which the steel wire is passed through the rib plate 20 of the widened rib to form a self-stabilizing system.

[0053] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A widening rib for a bridge flange, characterized in that: The cross section of the widening rib is T-shaped, and the widening rib includes a wing plate and a rib plate; wherein, The wing plate includes a web connecting portion, an extension portion and a flange widening portion, wherein the web connecting portion is used to connect to the outer side of the web of the existing main beam, the extension portion is connected between the web connecting portion and the flange widening portion, the flange widening portion is used to connect to the flange end of the existing main beam, and the flange widening portion extends out of the flange end of the existing main beam along its own extension direction; The rib plate is arranged on the inner side of the wing plate, and the height of the rib plate is gradually reduced from the web connecting portion of the wing plate toward the flange widening portion.

2. The widening rib for bridge flange according to claim 1, characterized in that: The web connecting portion of the wing plate is arranged in an inclined shape downward from the top toward the web of the existing main beam.

3. The widening rib for bridge flange according to claim 1, characterized in that: The extension portion is arranged to be inclined upward from the web connecting portion toward the flange widening portion, and the flange widening portion is arranged horizontally.

4. The widening rib for bridge flange according to claim 3, characterized in that: It also includes a prefabricated anchor block, which is protruding from the widened portion of the flange of the wing plate and is arranged away from the flange end of the existing main beam.

5. The widening rib for bridge flange according to claim 4, characterized in that: It also includes a pre-installation block and a plurality of shear steel bars. The pre-installation block is fixed on the flange widening portion of the wing plate and is arranged between the prefabricated anchor block and the flange end of the existing main beam. The bottom of the shear steel bar is embedded in the pre-installation block, and the plurality of shear steel bars are arranged at intervals along the extension direction of the pre-installation block.

6. The widening rib for bridge flange according to claim 4, characterized in that: The prefabricated anchor block is in a rectangular parallelepiped shape, and the width of the prefabricated anchor block is consistent with the width of the web connecting portion.

7. The widening rib for bridge flange according to claim 1, characterized in that: A plurality of shear key protrusions are formed on the web connecting portion, and the plurality of shear key protrusions are arranged at intervals along the extending direction of the web connecting portion.

8. The widening rib for bridge flange according to claim 4, characterized in that: A prefabricated channel extending in the transverse direction of the bridge is provided in the prefabricated anchor block.

9. The widening rib for bridge flange according to claim 7, characterized in that: The number of the shear key protrusions is five, and the five shear key protrusions are arranged at intervals along the extension direction of the web connecting portion.

10. A widened bridge, comprising an existing main beam, wherein the existing main beam is a box beam, characterized in that: It also includes a widened rib for a bridge flange as described in any one of claims 1 to 9, wherein the web connecting portion of the widened rib is connected to the outer side of the web of the existing main beam, and the flange widening portion of the widened rib is connected to the flange end of the existing main beam.

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