Accurate in-position device for hoisting steel box girder

Abstract

The utility model discloses an accurate in-position device for hoisting a steel box girder, which comprises two steel box girder partitioning units, and each steel box girder partitioning unit comprises a top plate, a web plate and a bottom plate. For one steel box girder block unit, the web plate extends out of the end of the top plate to form a first notch, the bottom plate extends out of the end of the web plate to form a first protruding part, meanwhile, a limiting support is arranged at the top plate, and a limiting clamping groove is formed in the limiting support. For another steel box girder block unit, the top plate extends out of the end of the web plate to form a second protruding part, the second protruding part is embedded into the first notch, the web plate extends out of the end of the bottom plate to form a second notch, the first protruding part is embedded into the second notch, and meanwhile a limiting rod is arranged at the top plate and embedded into the limiting clamping groove. According to the utility model, the joint of the two connected steel box girder block units is prevented from generating a through seam, the longitudinal stress performance of the steel structure bridge is improved, the two steel box girder block units can be accurately positioned, and the construction quality of the continuous steel box girder is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and in particular relates to a precise positioning device for hoisting a steel box girder. Background Art

[0002] According to the classification of construction materials of viaducts, viaducts are divided into reinforced concrete structures and steel box girder structures. When constructing viaducts across intersections, continuous steel box girder structures are often used to reduce the impact on traffic on existing roads. Steel box girder structures can be prefabricated in factories and are fast to construct on site. The construction of viaduct continuous steel box girder structures is mostly carried out by segmented hoisting and high-altitude assembly.

[0003] Traditional continuous steel box girders are made of blocks connected to each other, and through seams are prone to appear at the connection between two blocks, greatly reducing the longitudinal force performance of steel structure bridges. Moreover, when lifting the steel box girder blocks, the traditional lifting method is prone to poor docking accuracy of the steel box girder blocks. Utility Model Content

[0004] The utility model aims to solve the above-mentioned technical problems existing in the prior art, and provides a precise positioning device for steel box girder hoisting, so as to avoid the occurrence of through seams at the connection between two connected steel box girder block units, improve the longitudinal force performance of the steel structure bridge, and at the same time enable the two steel box girder block units to be precisely positioned, thereby improving the construction quality of the continuous steel box girder.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The precise positioning device for steel box girder hoisting includes two connected steel box girder block units, the steel box girder block units include a top plate, a web plate and a bottom plate, and the web plate is fixed between the top plate and the bottom plate. It is characterized by:

[0007] For one of the steel box girder block units, the web extends from the end of the top plate to form a notch, and the bottom plate extends from the end of the web to form a raised portion. At the same time, a limit support is provided at the top plate, and the limit support is provided with a limit slot.

[0008] For another steel box girder block unit, the top plate extends from the end of the web plate to form a second protrusion, which is embedded in the first groove; the web plate extends from the end of the bottom plate to form a second groove, which is embedded in the second groove; and a limit rod is provided at the top plate at the same time, which is embedded in the limit slot. The limit rod is limited in the limit slot in the width direction of the steel box girder block unit.

[0009] Furthermore, the limiting support includes a limiting base and a jack, the jack is installed in the limiting base, the limiting base is welded to the top plate, and the jack is provided with a limiting plate, the limiting plate forms a limiting slot, and the limiting rod is fixed to the top plate according to the position of the limiting plate.

[0010] Furthermore, the limiting base is provided with an inner cavity, the jack is arranged in the inner cavity, there is a gap between the outer side of the jack and the inner side of the inner cavity, and the limiting base is provided with a limiting member, through the action of the limiting member on the jack, the jack is limited in the inner cavity.

[0011] Furthermore, the limiting member adopts a limiting bolt, and the limiting base is provided with at least three through holes, each through hole is penetrated by a limiting bolt, the limiting bolt extends into the inner cavity and presses against the outside of the jack, the limiting bolt is threadedly connected with a limiting nut, and the limiting nut is limited to the outside of the limiting base.

[0012] Furthermore, the limiting base is provided with four through holes, and the four through holes are evenly distributed circumferentially on the limiting base.

[0013] Furthermore, the limiting rod includes a limiting part 1 and a limiting part 2, the limiting part 1 and the limiting part 2 are fixedly connected to form an L shape, the limiting part 1 is inserted into the limiting slot, and the limiting part 2 is welded to the top plate.

[0014] Furthermore, a stiffening plate 1 is welded between the limiting portion 1 and the limiting portion 2.

[0015] Furthermore, a second stiffening plate is welded between the second limiting portion and the top plate.

[0016] Furthermore, the first limiting portion and the second limiting portion are an integrally formed structure.

[0017] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0018] The utility model arranges the steel box beam block units in a stepped shape. When two steel box beam block units are connected, the top plates and bottom plates of the steel box beam block units are staggered to avoid the occurrence of through seams at the connection between the two steel box beam block units, thereby improving the longitudinal force performance of the steel structure bridge.

[0019] Moreover, the limit rod on the steel box girder block unit is embedded in the limit slot of the limit support of another steel box girder block unit, so that the steel box girder block unit is restricted in lateral movement on the other steel box girder block unit, which can make the two steel box girder block units accurately positioned, ensure the accurate connection of the two steel box girder block units, and improve the construction quality of the continuous steel box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the utility model when the precise positioning device for hoisting the steel box girder is not installed;

[0022] Figure 2 It is a structural schematic diagram of the installation of the precise positioning device for hoisting the steel box girder in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the position limiting support in the utility model;

[0024] Figure 4 for Figure 3 A top view of

[0025] Figure 5 This is a schematic diagram of the structure of the limiting plate in the utility model;

[0026] Figure 6 for Figure 5 A top view of

[0027] Figure 7 It is a structural schematic diagram of the limiting rod in the utility model;

[0028] Figure 8 for Figure 1 Top view of the .

[0029] In the figure, 1-steel box girder block unit; 2-top plate; 3-web plate; 4-bottom plate; 5-limit bearing; 6-limit rod; 7-limit base; 8-jack; 9-limit plate; 10-limit bolt; 11-limit nut; 12-inner cavity; 13-limit slot; 14-limit part one; 15-stiffening plate one; 16-limit part two; 17-stiffening plate two; 18-slot one; 19-raised part one; 20-raised part two; 21-slot two; a-width direction of the steel box girder block unit. DETAILED DESCRIPTION

[0030] like Figures 1 to 8 As shown, the utility model is a precise positioning device for lifting a steel box girder, which includes two connected steel box girder block units 1. The steel box girder block unit 1 includes a top plate 2, a web plate 3 and a bottom plate 4. The web plate 3 is fixed between the top plate 2 and the bottom plate 4.

[0031] For one of the steel box girder block elements 1 ( Figure 1 In the steel box girder block unit 1 on the left, the web 3 extends from the end of the top plate 2 to form a notch 18, and the bottom plate 4 extends from the end of the web 3 to form a protrusion 19. At the same time, a limit support 5 is provided at the top plate 2, and the limit support 5 is provided with a limit slot 13.

[0032] For another steel box girder block element 1 ( Figure 1In the steel box girder block unit 1 on the right, the top plate 2 extends from the end of the web 3 to form a protrusion 20, which is embedded in a notch 18, and the web 3 extends from the end of the bottom plate 4 to form a notch 21, and the protrusion 19 is embedded in the notch 21. At the same time, a limit rod 6 is provided at the top plate 2, and the limit rod 6 is embedded in the limit slot 13. The limit rod 6 is limited in the limit slot 13 in the width direction a of the steel box girder block unit. The utility model arranges the steel box girder block unit 1 in a stepped shape, and the top plate 2 and the bottom plate 4 of the steel box girder block unit 1 are staggered by 200 mm or more, so as to avoid the occurrence of a through seam at the connection of two steel box girder block units 1 and improve the longitudinal force performance of the steel structure bridge.

[0033] The utility model specifically designs the limit support 5: the limit support 5 includes a limit base 7 and a jack 8, the jack 8 is installed in the limit base 7, the limit base 7 is welded to the top plate 2, and the jack 8 is provided with a limit plate 9, the limit plate 9 forms a limit slot 13, and the limit rod 6 is fixed to the top plate 2 according to the position of the limit plate 9. When the two steel box beam block units 1 are hoisted in place, the jack 8 is turned on, so that the limit slot 13 formed by the limit plate 9 is connected to the limit rod 6, and the limit plate 9 of the utility model can be lifted up and down to prevent the limit plate 9 from touching the limit rod 6 and affecting the hoisting of the steel box beam block unit 1.

[0034] Considering the installation error of the limit support 5 and the limit rod 6, the limit rod 6 cannot be embedded in the limit slot 13. In view of this technical problem, the limit base 7 is provided with an inner cavity 12, and the jack 8 is arranged in the inner cavity 12. There is a gap between the outer side of the jack 8 and the inner side of the inner cavity 12. The limit base 7 is provided with a limit member, and the jack 8 is limited in the inner cavity 12 through the action of the limit member on the jack 8. The limit member adopts a limit bolt 10, and the limit base 7 is provided with at least three through holes, specifically four through holes, and the four through holes are evenly distributed circumferentially on the limit base 7. Each through hole is penetrated with a limiting bolt 10, which extends into the inner cavity 12. The limiting bolt 10 is threadedly connected with the limiting nut 11, and the limiting nut 11 is limited on the outside of the limiting base 7. By changing the position of the limiting nut 11 on the limiting bolt 10, the length of the limiting bolt 10 extending into the inner cavity 12 is adjusted so that the limiting bolt 10 presses against the outside of the jack 8. The position of the jack 8 in the inner cavity 12 is adjusted by the limiting bolt 10 and the limiting nut 11 to ensure that the limiting rod 6 can always be embedded in the limiting slot 13.

[0035] The limiting rod 6 is made of angle steel, and includes a limiting part 14 and a limiting part 2 16 in an integrally formed structure. The limiting part 14 and the limiting part 2 16 are fixedly connected in an L shape, and a stiffening plate 15 is welded between the limiting part 14 and the limiting part 2 16, so that the limiting rod 6 has sufficient strength and is not easily deformed. The limiting part 14 is inserted into the limiting slot 13, the limiting part 2 16 is welded on the top plate 2, and a stiffening plate 2 17 is welded between the limiting part 2 16 and the top plate 2 to improve the connection strength between the limiting rod 6 and the top plate 2.

[0036] The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the utility model to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the utility model.

Claims

1. A precise positioning device for lifting a steel box girder, comprising two connected steel box girder block units; The steel box girder block unit comprises a top plate, a web plate and a bottom plate, wherein the web plate is fixed between the top plate and the bottom plate; Features: For one of the steel box girder block units, the web plate extends from the end of the top plate to form a notch, the bottom plate extends from the end of the web plate to form a convex portion, and a limit support is provided at the top plate, and the limit support is provided with a limit slot; For another steel box girder block unit, the top plate extends from the end of the web plate to form a second protrusion, and the second protrusion is embedded in the first groove. The web plate extends from the end of the bottom plate to form a second groove, and the first protrusion is embedded in the second groove. At the same time, a limiting rod is provided at the top plate, and the limiting rod is embedded in the limiting slot. The limiting rod is limited in the width direction of the steel box girder block unit in the limiting slot.

2. The precise positioning device for hoisting a steel box girder according to claim 1 is characterized in that: The limit support includes a limit base and a jack, the jack is installed in the limit base, the limit base is welded to the top plate, and the jack is provided with a limit plate, the limit plate is formed with the limit slot, and the limit rod is fixed to the top plate according to the position of the limit plate.

3. The precise positioning device for hoisting a steel box girder according to claim 2 is characterized in that: The limiting base is provided with an inner cavity, the jack is arranged in the inner cavity, there is a gap between the outer side of the jack and the inner side of the inner cavity, and the limiting base is provided with a limiting member, through the action of the limiting member on the jack, the jack is limited in the inner cavity.

4. The precise positioning device for hoisting a steel box girder according to claim 3 is characterized in that: The limiting member adopts a limiting bolt, and the limiting base is provided with at least three through holes, each of which is penetrated by a limiting bolt, the limiting bolt extends into the inner cavity and presses against the outer side of the jack, the limiting bolt is threadedly connected to a limiting nut, and the limiting nut is limited on the outer side of the limiting base.

5. The precise positioning device for hoisting a steel box girder according to claim 4 is characterized in that: The limiting base is provided with four through holes, and the four through holes are evenly distributed circumferentially on the limiting base.

6. The precise positioning device for hoisting a steel box girder according to claim 2 is characterized in that: The limiting rod includes a limiting portion 1 and a limiting portion 2, wherein the limiting portion 1 and the limiting portion 2 are fixedly connected to form an L shape, the limiting portion 1 is inserted into the limiting slot, and the limiting portion 2 is welded to the top plate.

7. The precise positioning device for hoisting a steel box girder according to claim 6 is characterized in that: A stiffening plate 1 is welded between the limiting portion 1 and the limiting portion 2.

8. The precise positioning device for hoisting a steel box girder according to claim 6 is characterized in that: A second stiffening plate is welded between the second limiting portion and the top plate.

9. The precise positioning device for hoisting a steel box girder according to claim 6, characterized in that: The first limiting part and the second limiting part are an integrally formed structure.

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