CN216712734U - A connection structure of steel-concrete composite beam prefabricated bridge deck - Google Patents

Abstract

The utility model discloses a connection structure of a prefabricated bridge deck of a steel-concrete composite beam, which comprises a first steel plate, the length of the first steel plate is adapted to the length of the prefabricated bridge deck, and the first steel plate passes through a number of shearing forces arranged at intervals The nails are pre-buried on the bottom surface of the prefabricated bridge deck, the shearing nails are distributed along the entire length of the first steel plate, and the prefabricated bridge deck is welded and connected to the steel main beam through a slot structure. The structure effectively expands the arrangement range of shear nails, which can be equivalent to the arrangement of conventional cast-in-place concrete bridge decks, avoids stress concentration at the cluster shear keys of conventional precast concrete slabs, and effectively improves construction quality. Structural welding to connect the steel main beam makes the prefabricated bridge deck and the steel main beam do not need to open holes, and will not weaken the force of the two, which is conducive to ensuring the reliable quality of the structure, effectively improving the adaptability, reducing the construction process, and avoiding the need for connecting bolts. Effects on shear stud placement.

Description

A connection structure of a steel-concrete composite beam prefabricated bridge deck

technical field

The utility model relates to the technical field of prefabricated bridge deck structures, in particular to a connection structure of a prefabricated bridge deck of a steel-concrete composite beam.

Background technique

In the existing construction of steel-concrete composite beams using prefabricated bridge decks, the conventional solution is to prefabricate the concrete bridge decks in blocks, and the bridge decks are set on the steel main beams to reserve slots at the corresponding positions of the cluster shear nails, waiting for the concrete slabs to be installed. After completion, pour concrete and seal it to achieve the purpose of connecting the concrete slab and the steel main beam. In this scheme, cluster shear nails can only be set at the reserved slots in the bridge deck, and there are problems such as limited number of shear nails, stress concentration at the shear nails, affected bridge deck reinforcement arrangement, and concrete pouring in the openings on site. . There are other solutions to prefabricate the bridge deck by burying the shear nails in the concrete, and reserve bolt holes at the bottom of the concrete. After the concrete bridge deck is erected, the upper flange of the steel main beam is connected to the concrete bridge deck by bolts. Bolt holes need to be reserved in the slab. When pouring concrete, the bolt holes are prone to misalignment, the quality of the pre-embedded bolt holes is not high, which leads to unreliable connection quality in the later stage, and the openings weaken the concrete slab. The corresponding positions of the bolt holes also need to be opened, and there is also a certain cross-section weakening problem for the steel main beam, and the construction is more complicated. For this reason, it is necessary to consider the scheme of all-precast concrete bridge deck to improve the construction quality and effectively improve the structural stress.

Utility model content

The purpose of the utility model is to overcome the problems in the prior art that the prefabricated bridge deck with clustered shear nails has a limited number of shear nails, concentrated force, and pouring reserved hole concrete, resulting in a large amount of on-site construction work and difficult control of construction quality. However, the scheme of reserving bolt holes in the prefabricated bridge deck has the above shortcomings such as unreliable connection quality, easy bolt hole deviation during pouring, easy loosening and falling off of bolt connections under the action of train vibration, causing potential safety hazards, and weakening of the structure by openings. , to provide a connection structure of a steel-concrete composite beam prefabricated bridge deck.

In order to achieve the above purpose, the utility model provides the following technical solutions:

A steel-concrete composite beam prefabricated bridge deck connection structure, comprising a first steel plate, the length of the first steel plate is adapted to the length of the prefabricated bridge deck, and the first steel plate is embedded in the On the bottom surface of the prefabricated bridge deck, the shear nails are distributed along the entire length of the first steel plate, and the prefabricated bridge deck is welded and connected to the steel main beam through a slot structure.

Parameters such as the buried depth, spacing, and quantity of the shear nails are determined according to actual needs.

By adopting the connection structure of the steel-concrete composite beam prefabricated bridge deck of the present invention, by arranging the shear nails on the first steel plate embedded in the prefabricated bridge deck, the arrangement range can be effectively expanded, which can be equivalent to Compared with the conventional cast-in-place concrete bridge deck layout, it avoids stress concentration at the shear key, reduces the construction of on-site concrete, and effectively improves the construction quality. The structure is easy to install and locate. The slot structure can be embedded in the prefabricated bridge deck or connected to the first steel plate, so that the prefabricated bridge deck and the steel main beam do not need to be opened, and the force of the two will not be weakened. It is beneficial to ensure the reliable quality of the structure, effectively improve the adaptability, reduce the construction process, and avoid the influence of the connecting bolts on the arrangement of the shear studs.

Preferably, the bottom surfaces on both sides of the first steel plate are provided with the slot structure, the width of the slot structure is adapted to the thickness of the upper flange of the steel main beam, and the slot structure is connected to the upper flange. welding.

Further preferably, the slot structure and the bottom surface of the upper flange have a fillet weld.

Preferably, both sides of the first steel plate have the slot structure, the slot of the slot structure is arranged downward, and the top surfaces of both sides of the upper flange of the steel main beam are provided with connecting nails. The shape and size of the clamping groove structure is adapted to the shape and size of the connecting nail, the clamping groove structure is welded with the upper flange, and the clamping groove structure and the side surface of the connecting nail have fillet welds.

Preferably, it also includes a second steel plate with a channel structure embedded in the prefabricated bridge deck, the second steel plate is located on both sides of the first steel plate, the second steel plate is welded with the first steel plate, and the second steel plate is welded with the first steel plate. The lower side plate of the second steel plate and the first steel plate form the slot structure, the width of the slot structure is adapted to the thickness of the upper flange of the steel main beam, and the slot structure and the upper flange welding.

Further preferably, the lower side plate of the second steel plate and the bottom surface of the upper flange have a fillet weld.

The clamping groove structure can be set in the above-mentioned manner. The clamping groove structure and the upper flange are installed in place and then welded, so as to realize the reliable connection between the steel main beam and the concrete bridge deck, and it is not necessary to open holes on the bridge deck or the steel main beam, which is effective. The integrity of the structure is improved, and the use of bolts is avoided to avoid safety risks such as falling in the later operation process.

Further preferably, the transverse reinforcement of the prefabricated bridge deck is broken at the second steel plate and welded with the second steel plate; or

The second steel plate has holes at the transverse reinforcing bars.

Further preferably, the buried depth of the second steel plate in the prefabricated bridge deck is greater than or equal to the height of the shear nail.

Preferably, the thickness of the first steel plate is the same as the thickness of the upper flange of the steel main beam.

Further preferably, the width of the prefabricated bridge deck is the width of the bridge deck, and two longitudinally adjacent prefabricated bridge decks are connected by wet joints, and several shear keys are correspondingly arranged in the wet joints.

Further preferably, the shear key is welded to the top surface of the steel main beam.

Further preferably, the two longitudinally adjacent first steel plates are both extended into the wet joint for welding connection, and the shear keys are respectively welded to the top surfaces of the corresponding first steel plates.

It is beneficial to reduce the construction of on-site concrete, and at the same time ensure the reliable force of the wet joint.

To sum up, compared with the prior art, the beneficial effects of the present utility model are:

By adopting the connection structure of the steel-concrete composite beam prefabricated bridge deck according to the utility model, the arrangement range of the shear nails can be effectively expanded, which can be equivalent to the arrangement of the conventional cast-in-place concrete bridge deck, and the stress concentration at the shear key is avoided. Effectively improve the construction quality, the prefabricated bridge deck is welded and connected to the steel main girder through the slot structure, so that the prefabricated bridge deck and the steel main girder do not need to be opened, and the force of the two will not be weakened, which is beneficial to ensure the reliable and effective structural quality. Improve adaptability, reduce construction technology, and avoid the influence of connecting bolts on the arrangement of shear nails.

Description of drawings:

1 is a structural schematic diagram of a connection structure of a steel-concrete composite beam prefabricated bridge deck in Example 1;

FIG. 2 is a schematic structural diagram of a connection structure of a steel-concrete composite beam prefabricated bridge deck in Example 2. FIG.

FIG. 3 is a schematic structural diagram of a connection structure of a steel-concrete composite beam prefabricated bridge deck in Example 3. FIG.

Marked in the figure: 1-first steel plate, 2-prefabricated bridge deck, 3-shear nails, 4-steel main beam, 5-connecting nails, 6-second steel plate.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. But it should not be construed that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

Example 1

As shown in FIG. 1 , the connection structure of a steel-concrete composite beam prefabricated bridge deck according to the present invention includes a first steel plate 1 , and the length of the first steel plate 1 is adapted to the length of the prefabricated bridge deck 2 . Ordinary steel bars at corresponding positions in the bridge deck 2 are welded to the first steel plate 1, and the first steel plate 1 is pre-buried on the bottom surface of the prefabricated bridge deck 2 through a number of shear nails 3 arranged at intervals. The bottom surface is flush with the bottom surface of the prefabricated bridge deck 2 , the shear nails 3 are distributed along the entire length of the first steel plate 1 , and parameters such as the buried depth, spacing, and quantity of the shear nails 3 are determined according to actual needs. The prefabricated bridge deck 2 is welded and connected to the steel main beam 4 through the slot structure. Specifically, the thickness of the first steel plate 1 is the same as the thickness of the upper flange of the steel main beam 4. The bottom surfaces of both sides have the slot structure, and the width of the slot structure is adapted to the thickness of the upper flange of the steel main beam 4. The slot structure is about 2mm wide after the upper flange is installed. The slot structure is welded with the upper flange. The slot structure and the bottom surface of the upper flange have fillet welds. The slot structure does not limit the length of the installation. . By adopting the method of slotting and matching with welding, the connection between the prefabricated bridge deck 2 and the steel main beam 4 is strengthened, and the connection of facility bolts in the concrete slab is avoided. The slotted structure can be integrated with the first steel plate 1. It can be formed by welding angle steel, channel steel, etc. The first steel plate 1 has the function of a shear key, which strengthens the connection between the concrete and the steel main beam 4, or can save part of the arrangement of the shear nails 3.

Usually, a steel-concrete composite girder bridge has at least two pieces of the steel main girders 4 , and FIG. Preferably, the width of the prefabricated bridge deck 2 is the width of the bridge deck, and the two longitudinally adjacent prefabricated bridge decks 2 are connected by wet joints, that is, prefabricated in sections only in the longitudinal direction, which is beneficial to reduce the amount of concrete on site. During construction, a number of shear keys are correspondingly arranged in the wet joints to effectively ensure the reliability of the force at the wet joints. The shear keys can be welded to the top surface of the steel main beam 4, or the corresponding two Each of the first steel plates 1 extends halfway into the wet joint, and is welded and connected in the wet joint, and the shear key is located on the top surface of the first steel plate 1 .

Example 2

The connection structure of a steel-concrete composite beam prefabricated bridge deck according to the present invention is roughly the same as that of Embodiment 1, and the difference lies in that both sides of the first steel plate 1 are provided with grooves facing downward. In the slot structure, the top surfaces on both sides of the upper flange of the steel main beam 4 are provided with several connecting nails 5 distributed at intervals. The slot structure is welded to the upper flange, as shown in Figure 2. The slot structures on both sides are connected with the first steel plate 1 by welding, and the slot structures and the side of the connecting nail 5 have fillet welds. During prefabrication, the slot structures and the first steel plate 1 are pre-buried in the place. described in the prefabricated bridge deck 2.

Example 3

The connection structure of a steel-concrete composite beam prefabricated bridge deck described in the present invention is roughly the same as that of Embodiment 1, and the difference is that, as shown in FIG. The second steel plate 6 of the channel structure in Reserve the thickness of the protective layer. The second steel plates 6 are located on both sides of the first steel plate 1 respectively, and should be arranged symmetrically. The second steel plate 6 is butt welded to the first steel plate 1, and the lower side plate of the second steel plate 6 The steel plate 1 forms the slot structure, the width of the slot structure is adapted to the thickness of the upper flange of the steel main beam 4, the slot structure is welded with the upper flange, and the lower part of the second steel plate 6 is welded. The side plate and the bottom surface of the upper flange have fillet welds. The second steel plate 6 does not limit the need for a through-length arrangement.

In order to facilitate the arrangement of the transverse reinforcement bars in the prefabricated bridge deck 2, the second steel plate 6 can have holes at the corresponding positions where the transverse reinforcement bars are arranged to facilitate the reinforcement of the reinforcement bars to pass through; the transverse reinforcement bars can also be broken at the second steel plate 6. open and welded with the second steel plate 6 .

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (10)

1. A connection structure of a steel-concrete composite beam prefabricated bridge deck, characterized in that it comprises a first steel plate (1), the length of the first steel plate (1) is adapted to the length of the prefabricated bridge deck (2), and the The first steel plate (1) is pre-embedded on the bottom surface of the prefabricated bridge deck (2) through a number of shear studs (3) arranged at intervals, and the shear studs (3) are distributed along the entire length of the first steel plate (1). , the prefabricated bridge deck (2) is welded and connected to the steel main beam (4) through the slot structure. 2 . The connection structure of a prefabricated bridge deck of a steel-concrete composite beam according to claim 1 , wherein the bottom surfaces of both sides of the first steel plate ( 1 ) are provided with the slotted structure, and the The width is adapted to the thickness of the upper flange of the steel main beam (4), the slot structure is welded with the upper flange, and the slot structure and the bottom surface of the upper flange have fillet welds. 3. The connection structure of a prefabricated bridge deck of a steel-concrete composite girder according to claim 1, characterized in that, both sides of the first steel plate (1) are provided with the slot structure, and the slot of the slot structure is Set downward, the top surfaces of both sides of the upper flange of the steel main beam (4) are provided with connecting nails (5), and the shape and size of the slot structure are adapted to the shape and size of the connecting nails (5), so The clamping groove structure is welded with the upper flange, and the clamping groove structure and the side surface of the connecting nail (5) are provided with fillet welds. 4. The connection structure of a prefabricated bridge deck of a steel-concrete composite girder according to claim 1, characterized in that, further comprising a second steel plate (6) of a channel structure embedded in the prefabricated bridge deck (2), The second steel plate (6) is located on both sides of the first steel plate (1), the second steel plate (6) is welded with the first steel plate (1), and the lower plate of the second steel plate (6) is connected to the first steel plate (1). The first steel plate (1) forms the slot structure, the width of the slot structure is adapted to the thickness of the upper flange of the steel main beam (4), and the slot structure is welded with the upper flange, The lower side plate of the second steel plate (6) and the bottom surface of the upper flange have a fillet weld. 5. The connection structure of the steel-concrete composite beam prefabricated bridge deck according to claim 4, characterized in that, the transverse reinforcement of the prefabricated bridge deck (2) is disconnected at the second steel plate (6) and is connected to the welding the second steel plate (6); or The second steel plate (6) has holes at the transverse reinforcement. 6. The connection structure of a prefabricated bridge deck of a steel-concrete composite girder according to claim 4, characterized in that the burial depth of the second steel plate (6) in the prefabricated bridge deck (2) is greater than or equal to the Height of shear nail (3). 7. The connection structure of the steel-concrete composite beam prefabricated bridge deck according to any one of claims 1-6, wherein the thickness of the first steel plate (1) is the same as that of the upper wing of the steel main beam (4). The thickness of the edges is the same. 8 . The connection structure of the steel-concrete composite beam prefabricated bridge deck according to claim 7 , wherein the width of the prefabricated bridge deck ( 2 ) is the width of the bridge deck, and the two longitudinally adjacent prefabricated bridge decks (2) They are connected by wet seams, and a plurality of shear keys are correspondingly arranged in the wet seams. 9 . The connection structure of a prefabricated bridge deck of a steel-concrete composite girder according to claim 8 , wherein the shear key is welded to the top surface of the steel main girder ( 4 ). 10 . 10 . The connection structure of a prefabricated bridge deck of a steel-concrete composite beam according to claim 8 , characterized in that, the two longitudinally adjacent first steel plates ( 1 ) are both extended into the wet joint for welding connection, The shear keys are respectively welded to the corresponding top surfaces of the first steel plates (1).

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