A comb plate expansion joint installation structure for connecting steel box beams and cast-in-place beams

Abstract

The utility model discloses a comb-tooth plate expansion joint installation structure for connecting a steel box girder and a cast-in-place girder, comprising a steel box girder, a cast-in-place box girder and a comb-tooth plate expansion joint device for covering the gap between the steel box girder and the cast-in-place box girder, anchor plates are welded and installed side by side on the upper side of the steel box girder, embedded steel bars are arranged side by side on the cast-in-place box girder, annular anchor bars are installed on the embedded steel bars, the comb-tooth plate expansion joint device is connected to the anchor plate and the annular anchor bars, a baffle plate is connected to one end of the anchor plate facing the gap, waterproof concrete is filled between the steel box girder, the cast-in-place box girder, the comb-tooth plate expansion joint device and the baffle plate, the annular anchor bars and the anchor plates are arranged to support and position the comb-tooth plate expansion joint device, and the function of the expansion joint device can be ensured without secondary cutting of the bridge deck pavement structure.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal bridges, in particular to a comb plate expansion joint installation structure used for connecting a steel box beam and a cast-in-place beam. Background Art

[0002] Usually, the expansion joints of bridges are constructed by post-embedded construction after the construction of the bridge deck system is completed, that is, the bridge deck structure at the expansion joint must be cut off first. However, in industrial pipeline engineering projects that generally use bridges as load-bearing structures, the installation of pipe racks and pipelines is often started after the construction of the bridge superstructure is completed, and then the construction of auxiliary structures is carried out. Therefore, according to the traditional construction process, the bridge deck pavement structure at the expansion joint position needs to be cut twice, which affects the construction efficiency. Utility Model Content

[0003] The utility model provides a comb plate expansion joint installation structure for connecting a steel box beam and a cast-in-place beam, which can solve the problem that the existing expansion joint installation structure needs to perform secondary cutting on the bridge deck pavement structure during construction.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a comb-tooth plate expansion joint installation structure for connecting a steel box girder and a cast-in-place girder, comprising a steel box girder, a cast-in-place box girder and a comb-tooth plate expansion joint device covering the gap between the steel box girder and the cast-in-place box girder, anchor plates are welded and installed side by side on the upper side of the steel box girder, embedded steel bars are arranged side by side on the cast-in-place box girder, annular anchor bars are installed on the embedded steel bars, the comb-tooth plate expansion joint device is connected to the anchor plate and the annular anchor bars, a baffle is connected to one end of the anchor plate facing the gap, waterproof concrete is filled between the steel box girder, the cast-in-place box girder, the comb-tooth plate expansion joint device and the baffle, and the annular anchor bars and anchor plates are arranged to support and position the comb-tooth plate expansion joint device first, and the function of the expansion joint device can be ensured without secondary cutting of the bridge deck pavement structure.

[0005] Preferably, cross-reinforcement bars are installed between the side-by-side annular anchor bars and between the side-by-side anchor plates, which can improve the installation strength of the annular anchor bars and anchor plates and improve the support stability.

[0006] Preferably, longitudinal reinforcement connected to the anchor plate is installed on the upper side of the steel box girder, and the baffle is connected to one end of the longitudinal reinforcement. The longitudinal reinforcement can improve the pouring strength of the waterproof concrete.

[0007] Preferably, the longitudinal reinforcement is connected to the steel box girder via a plurality of shear nails, and the installation is firm and reliable.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] Combined with the structure and construction characteristics of the bridge, the function of the telescopic device can be fully guaranteed. By setting annular anchor bars and anchor plates, the comb plate telescopic device can be supported and positioned first. There is no need to make a secondary cutting of the bridge deck pavement structure, which is beneficial to ensuring the integrity of the bridge deck structure, facilitating construction for workers, improving construction quality, ensuring construction safety, speeding up construction progress, and saving construction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a main cross-sectional structural diagram of the utility model;

[0011] Figure 2 It is a top view of the structure of the utility model.

[0012] Reference numerals:

[0013] 1. Steel box girder, 11. Shear nails, 12. Waterproof concrete, 2. Cast-in-place box girder, 3. Comb plate telescopic device, 4. Anchor plate, 5. Cross-bar, 6. Longitudinal bar, 7. Telescopic stop bar, 8. Annular anchor bar, 9. Embedded bar, 10. Baffle. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0015] like Figure 1-2 As shown, in order to solve the problem that the existing expansion joint installation structure needs to perform secondary cutting on the bridge deck pavement structure during construction, the utility model provides the following technical solutions: a comb plate expansion joint installation structure for connecting a steel box girder and a cast-in-place girder, comprising a steel box girder 1, a cast-in-place box girder 2 and a comb plate expansion device 3 covering the gap between the steel box girder 1 and the cast-in-place box girder 2, anchor plates 4 are welded and installed side by side on the upper side of the steel box girder 1, embedded steel bars 9 are arranged side by side on the cast-in-place box girder 2, and annular anchor bars 8 are installed on the embedded steel bars 9, the comb plate expansion device 3 is connected to the anchor plate 4 and the annular anchor bars 8, and a baffle 10 is connected to the end of the anchor plate 4 facing the gap, and waterproof concrete 12 is filled between the steel box girder 1, the cast-in-place box girder 2, the comb plate expansion device 3 and the baffle 10, and the annular anchor bars 8 and the anchor plate 4 are provided to support and position the comb plate expansion device 3 first, and the function of the expansion device can be ensured without performing secondary cutting on the bridge deck pavement structure.

[0016] In this embodiment, cross-reinforcement bars 5 are installed between the side-by-side annular anchor bars 8 and between the side-by-side anchor plates 4, which can improve the installation strength of the annular anchor bars 8 and the anchor plates 4 and improve the supporting stability.

[0017] In this embodiment, if Figure 1As shown, the upper side of the steel box girder 1 is provided with a longitudinal steel bar 6 connected to the anchor plate 4, and the baffle 10 is connected to one end of the longitudinal steel bar 6. The longitudinal steel bar 6 can improve the pouring strength of the waterproof concrete 12. The longitudinal steel bar 6 is connected to the steel box girder 1 through a plurality of shear nails 11, and the installation is firm and reliable.

[0018] A telescopic stop bar 7 may be provided in the gap between the steel box girder 1 and the cast-in-place box girder 2 to prevent foreign objects from falling into the gap.

[0019] In this embodiment, the specific construction method of the expansion joint installation structure is as follows:

[0020] S1. Remove the protective cover plate at the expansion joint between the steel box girder 1 and the cast-in-place box girder 2, and install the comb plate expansion device 3 in units. The comb plate expansion device 3 should be leveled with the road surface, and the height difference should be checked with a 3m leveling ruler. The height difference should be ≤2mm.

[0021] S2. An annular anchor bar 8 is arranged on the side of the comb plate expansion and contraction device 3 close to the cast-in-place box girder 2 and connected to the embedded steel bars 9 of the cast-in-place box girder 2.

[0022] S3. An anchor plate 4 is installed on the side of the comb plate expansion and contraction device 3 close to the steel box girder 1. The anchor plate 4 can be a 32T-type anchor plate, and the lower side of the 32T-type anchor plate is welded to the surface of the steel box girder 1.

[0023] S4, shear nails 11 are welded on the surface of the steel box girder 1, and longitudinal steel bars 6 are arranged in the vertical and horizontal directions. The ends of the longitudinal steel bars 6 contain baffles 10, which can be extended into the comb plate telescopic device 3 to block the secondary poured waterproof concrete 12.

[0024] S5, the longitudinal reinforcement 6 is welded to the anchor plate 4 to make it firm and form a whole.

[0025] S6, cross reinforcement 5 is arranged between the annular anchor bar 8 and the anchor plate 4.

[0026] S7, pour waterproof concrete 12 in the reserved groove of expansion joint, smooth it with the bridge deck, maintain it, and the construction is completed.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention 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.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. 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" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A comb plate expansion joint installation structure for connecting steel box beams and cast-in-place beams, characterized in that: The invention comprises a steel box girder (1), a cast-in-place box girder (2), and a comb-tooth plate expansion and contraction device (3) for covering the gap between the steel box girder (1) and the cast-in-place box girder (2); anchor plates (4) are welded and installed side by side on the upper side of the steel box girder (1); embedded steel bars (9) are arranged side by side on the cast-in-place box girder (2); annular anchor bars (8) are installed on the embedded steel bars (9); the comb-tooth plate expansion and contraction device (3) is connected to the anchor plates (4) and the annular anchor bars (8); a baffle plate (10) is connected to one end of the anchor plate (4) facing the gap; and waterproof concrete (12) is filled between the steel box girder (1), the cast-in-place box girder (2), the comb-tooth plate expansion and contraction device (3) and the baffle plate (10).

2. The comb plate expansion joint installation structure for connecting steel box beams and cast-in-place beams according to claim 1 is characterized in that: Crossing steel bars (5) are installed between the annular anchor bars (8) arranged side by side and between the anchor plates (4) arranged side by side.

3. The comb plate expansion joint installation structure for connecting steel box beams and cast-in-place beams according to claim 1 is characterized in that: A longitudinal steel bar (6) connected to the anchor plate (4) is installed on the upper side of the steel box girder (1), and the baffle (10) is connected to one end of the longitudinal steel bar (6).

4. The comb plate expansion joint installation structure for connecting steel box beams and cast-in-place beams according to claim 3 is characterized in that: The longitudinal steel bars (6) are connected to the steel box girder (1) via a plurality of shear nails (11).

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