CN114775416A - Prestressed multidirectional displacement bridge expansion device and installation method thereof - Google Patents

Abstract

The invention discloses a prestressed multi-directional displacement bridge telescopic device, comprising a fixed comb-tooth plate, a movable comb-tooth plate, an anchor plate, a fixed plate and a damping connecting piece. The top of the side wall of the slit, the rear and lower part of the movable comb-tooth plate are installed on the installation notch on the top of the fixed plate through the damping connector, and a gap is left between the movable comb-tooth plate and the bottom wall and side wall of the installation notch. The installation method of the prestressed multi-directional displacement bridge expansion device of the present invention includes: S1, welding the expansion device and the pre-embedded anchoring bars in the reserved groove; S2, pouring the concrete layer in the reserved groove; S3, replacing the temporary transition plate, and then spreading Lay the asphalt layer; S4, replace the transition plate with a fixed comb-tooth plate and a movable comb-tooth plate, and fasten it. The prestressed multi-directional displacement bridge expansion device and its installation method of the present invention can better adapt to the multi-directional displacement requirements of the bridge under complex working conditions, the installation process is simplified, and the construction efficiency is improved.

Description

A kind of prestressed multi-directional displacement bridge expansion device and its installation method

technical field

The invention relates to the technical field of bridge expansion joints, in particular to a prestressed multi-directional displacement bridge expansion device and an installation method thereof.

Background technique

Bridge expansion joints are usually set between two beam ends, between beam ends and bridge abutments or at the hinged position of bridges to meet the requirements of bridge deck deformation. Bridge expansion joints adjust the displacement and coupling between the superstructure caused by vehicle loads and bridge construction materials. Bridge expansion joints should be able to prevent rainwater and garbage and soil from infiltrating and blocking; at the same time, installation, inspection, maintenance, and removal of dirt should be simple and convenient. When the bridge is set with expansion joints, the railings and the deck pavement must be disconnected.

There are many types of bridge expansion joints, among which, the unit type multi-directional displacement comb bridge expansion joint device is widely used. The unit type multi-directional displacement comb bridge expansion joint device has the advantages of low structure height, wide application range, stable driving, anti-skid and so on. However, most of the existing unit-type multi-directional displacement comb-tooth bridge expansion joint devices adopt the method of installing the rotating shaft and the control seat behind the movable comb-tooth plate to realize the adaptability of the rotation angle of the movable comb-tooth plate. It has the disadvantages of complex structure, unfavorable installation, and poor displacement ability in other directions except for corner displacement.

Therefore, it is necessary to develop a prestressed multi-directional displacement bridge expansion device and an installation method thereof to solve the problems in the prior art.

SUMMARY OF THE INVENTION

The purpose of the invention is to provide a prestressed multi-directional displacement bridge expansion device and its installation method, which can better adapt to the multi-directional displacement requirements of the bridge under complex working conditions, simplify the installation process and improve the construction efficiency.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

The present invention is a prestressed multi-directional displacement bridge telescopic device, comprising a fixed comb plate, a movable comb plate and an anchor plate, as well as a fixed plate and a damping connector, the fixed plate is fixedly connected on the top of the anchor plate and It is located at the top of the side wall of the beam end expansion joint. The rear and bottom of the movable comb-tooth plate is installed on the installation notch on the top of the fixed plate through the damping connector. The movable comb-tooth plate is connected to the bottom wall and side of the installation notch. There are gaps between the walls.

Further, the damping connector includes a screw rod, a locking nut and a damping column, the damping column is coaxially compounded in the middle of the screw rod, and the two ends of the screw rod are used after passing through the movable comb-tooth plate and the fixed plate. The lock nut is locked.

Further, the movable comb-tooth plate is provided with an upper clamping slot at the corresponding position of the damping column; the fixed plate is provided with a lower clamping slot at the corresponding position of the damping column; the vertically arranged damping column is up and down. Both ends enter into the upper clamping slot and the lower clamping slot respectively, and the height of the damping column is greater than the sum of the depths of the upper clamping slot and the lower clamping slot.

Further, the movable comb-tooth plate is provided with a nut countersunk hole at the screw installation position, and the locking nut is hidden and arranged in the nut countersunk hole.

Further, the damping column is specifically made of polyurethane or damping rubber.

Further, the anchoring plate includes a right anchoring plate and a left anchoring plate connected to the anchoring bars, the right anchoring plate is fixedly connected below the fixed comb plate, and the left anchoring plate is fixedly connected below the fixing plate.

Further, it also includes a support vertical plate, the left support vertical plate is vertically arranged on the end of the left anchor plate and below the fixing plate, and the right support vertical plate is vertically arranged on the right anchor plate end and below the fixed comb plate.

Further, it also includes a pre-embedded threaded sleeve and a screw, the pre-embedded threaded sleeve is fixedly connected to the anchoring rib under the fixed comb-tooth plate, and the screw passes through the countersunk head bolt on the fixed comb-tooth plate. Connect the hole in the thread of the pre-embedded threaded sleeve.

Further, a plurality of annular grooves at equal intervals are provided on the outer cylindrical wall of the embedded screw sleeve.

The invention discloses a method for installing a prestressed multi-directional displacement bridge expansion device, which is used for installing the above-mentioned prestressed multi-direction displacement bridge expansion device, comprising the following steps:

S1. Weld the expansion device with the pre-embedded anchoring bars in the reserved slot, that is, the welding and installation of the anchoring plate and the pre-embedded screw sleeve;

S2, pouring the concrete layer in the reserved groove;

S3. Remove the fixed comb-tooth plate and the movable comb-tooth plate, replace it with a temporary transition plate, and then spread the asphalt layer; determine the installation and external dimensions of the transition plate according to the positions of the fixed comb-tooth plate and the movable comb-tooth plate;

S4. Replace the transition plate with a fixed comb-tooth plate and a movable comb-tooth plate, and tighten the screws and nuts to the set torque range.

Compared with the prior art, the beneficial technical effects of the present invention:

The present invention is a prestressed multi-directional displacement bridge telescopic device. Through the setting of the damping connecting piece, there is a gap between it and the fixed plate, and there is no concrete or asphalt filling and contact around, so that the movable comb plate can be relative to the fixed plate. There is a small amount of movement margin, so that when the movable comb-tooth plate is impacted by rolling, the damping connector performs deformation buffering, which improves the safe operation performance of the equipment; The structure is simplified, and it can better adapt to the shock displacement buffer at any local point. By installing rubber sheets in both gaps, the gap can be sealed, and debris or debris can be placed to affect the displacement buffer. The prestressed multi-direction displacement bridge expansion device of the present invention can better adapt to the multi-direction displacement requirements of the bridge under complex working conditions.

In addition, the right anchor plate is welded and connected under the fixed comb plate, instead of the conventional bolt anchoring form, and the connection strength of the fixed comb plate is improved; the left support vertical plate is welded by welding the end of the left anchor plate and the bottom of the fixed plate , the position of the reserved groove can be determined and the concrete debris can be prevented from entering into the beam end expansion joint. At the same time, the supporting vertical plates on both sides increase the anchoring strength. By adopting the damping connector in the form of a double-probe screw, the beam end is inserted through the bolt through the hole without obstacles, which is convenient for installation; by correspondingly setting the upper snap groove and the lower snap groove on the movable comb plate and the fixed plate, it is convenient to locate the damping column. The movable comb-tooth plate is laterally locked at the installation position at the same time; the damping column made of polyurethane or damping rubber has good weather resistance and strong compressive ability, which improves the service life of the equipment. Through the setting of the embedded screw sleeve, the fixed comb-tooth plate is installed by screw connection, which is a detachable structure, which is convenient for maintenance and replacement in the later period. Anchoring area, which in turn improves the connection strength.

The installation method of the prestressed multi-directional displacement bridge expansion device of the invention can effectively protect the gap between the relatively arranged comb-tooth plates by using the transition plate as a process auxiliary device when paving asphalt, and avoids the need for further paving after asphalt paving. Slotting, maintenance and other processes save installation time and improve installation efficiency.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings.

1 is a schematic diagram of the installation structure of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention;

FIG. 2 is a schematic front view structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention;

3 is a schematic top view structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention;

Fig. 4 is the sectional structure schematic diagram of the movable comb tooth plate of the present invention;

Fig. 5 is the sectional structure schematic diagram of the fixing plate of the present invention;

6 is a schematic cross-sectional structural diagram of a damping connector of the present invention;

FIG. 7 is a schematic view of the front structure of Embodiment 2 of the prestressed multi-directional displacement bridge expansion device of the present invention;

FIG. 8 is a schematic diagram of the welding installation method of the prestressed multi-directional displacement bridge expansion device installation method according to the present invention;

9 is a schematic diagram of pouring concrete by the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention;

10 is a schematic diagram of asphalt paving for the installation method of a prestressed multi-directional displacement bridge expansion device according to the present invention;

FIG. 11 is a schematic diagram showing the assembly of the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention.

Description of reference numerals: 1. Fixed comb plate; 2. Movable comb plate; 201, Upper snap slot; 202, Nut countersunk hole; 3, Right anchor plate; 4, Fixed plate; 401, Lower snap slot ; 402, installation gap; 5, damping connector; 501, damping column; 6, left anchor plate; 7, supporting vertical plate; 8, stainless steel plate; 9, waterproof plate; 10, anchoring bar; 11, embedded screw sleeve ; 12, screws; 13, concrete layer; 14, asphalt layer; 15, transition plate.

Detailed ways

The core of the invention is to provide a prestressed multi-directional displacement bridge expansion device and its installation method, which can better adapt to the multi-directional displacement requirements of the bridge under complex working conditions, simplify the installation process and improve the construction efficiency.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of the present invention.

Referring to the accompanying drawings, FIG. 1 is a schematic view of the installation structure of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention; FIG. 2 is a schematic front view structure of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention;

3 is a schematic top view structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention; FIG. 4 is a schematic cross-sectional structure diagram of a movable comb plate of the present invention; FIG. 5 is a cross-sectional structural schematic diagram of a fixed plate of the present invention;

FIG. 6 is a schematic cross-sectional structural diagram of a damping connector of the present invention; FIG. 7 is a schematic front view structure of Embodiment 2 of a prestressed multi-directional displacement bridge expansion device of the present invention; FIG. 8 is a prestressed multi-directional displacement bridge expansion device of the present invention. Schematic diagram of installation method welding; Fig. 9 is a schematic diagram of pouring concrete by the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention; Fig. 10 is a schematic diagram of asphalt paving for the installation method of the pre-stressed multi-directional displacement bridge expansion device of the present invention; Schematic diagram of the installation method of the prestressed multi-directional displacement bridge expansion device of the invention.

Example 1:

As shown in Figures 1 to 6, a prestressed multi-directional displacement bridge expansion device, like a conventional comb-tooth plate expansion joint, includes a fixed comb-tooth plate 1, a movable comb-tooth plate 2, an anchor plate, a stainless steel plate 8 and a waterproof plate 9. The difference is that it also includes a fixing plate 4 and a damping connecting piece 5. The fixed plate 4 is welded to the top of the anchor plate and located at the top of the side wall of the beam end expansion joint. The rear and bottom of the movable comb plate 2 is installed on the installation gap 402 on the top of the fixed plate 4 through the damping connector 5, and the installation gap 402 is a rectangular gap. The number of the damping connectors 5 is plural and is arranged at equal intervals along the bridge width direction of the movable comb-tooth plate 2 . A gap is left between the movable comb plate 2 and the bottom wall and the side wall of the installation notch 402 . Further, rubber sheets for sealing are installed in the two gaps.

Through the setting of the damping connector 5 and the gap between it and the fixed plate 4, there is no concrete or asphalt filling contact around, so that the movable comb plate 2 can have a small amount of movement margin relative to the fixed plate 4, and then the movable comb plate 2 can have a small movement margin relative to the fixed plate 4. When the toothed plate 2 is impacted by rolling, the damping connecting piece 5 performs deformation and buffering, which improves the safe operation performance of the equipment; compared with the shaft-type displacement method, the present invention adopts the damping multi-point displacement deformation, which has a simplified structure and can better Adapt to the shock displacement buffer at any local point. By installing rubber sheets in both gaps, the gap can be sealed, and debris or debris can be placed to affect the displacement buffer. The prestressed multi-direction displacement bridge expansion device of the present invention can better adapt to the multi-direction displacement requirements of the bridge under complex working conditions.

In a specific embodiment, as shown in FIGS. 1 to 3 , the anchoring plate includes a right anchoring plate 3 and a left anchoring plate 6 connected to the embedded anchoring bars 10 , and the right anchoring plate 3 is welded and connected under the fixed comb-tooth plate 1 . , the left anchor plate 6 is welded and connected under the fixed plate 4 .

Specifically, the prestressed multi-directional displacement bridge telescopic device of the present invention further includes a supporting vertical plate 7, the left supporting vertical plate 7 is vertically welded on the end of the left anchoring plate 6 and below the fixing plate 4, and the right supporting vertical plate 4 7 Vertically welded on the end of the right anchor plate 3 and below the fixed comb plate 1.

The right anchor plate 3 is welded and connected under the fixed comb plate 1, instead of the conventional bolt anchoring form, and the connection strength of the fixed comb plate 1 is improved; Supporting the vertical plate 7 can determine the position of the reserved groove and prevent the concrete debris from entering the expansion joint of the beam end. At the same time, the supporting vertical plates 7 on both sides increase the anchoring strength.

In a specific embodiment, as shown in FIG. 6 , the damping connector 5 includes a screw rod, a locking nut and a damping column 501. The damping column 501 is coaxially vulcanized and compounded in the middle of the screw rod, and the two ends of the screw rod pass through the movable rod. The comb-tooth plate 2 and the fixing plate 4 are then locked with the lock nut.

Specifically, as shown in FIG. 2 , FIG. 4 and FIG. 5 , the movable comb-tooth plate 2 is provided with an upper snap groove 201 at the corresponding position of the damping column 501 . The fixing plate 4 defines a lower clamping slot 401 at the corresponding position of the damping column 501 . The upper and lower ends of the vertically arranged damping column 501 enter the upper clamping slot 201 and the lower clamping slot 401 respectively. The height of the damping column 501 is greater than the sum of the depths of the upper clamping slot 201 and the lower clamping slot 401 .

Specifically, as shown in FIG. 2 and FIG. 4 , the movable comb-tooth plate 2 is provided with a nut countersunk hole 202 at the screw installation position, and the locking nut is hidden and arranged in the nut countersunk hole 202 .

Specifically, the damping column 501 is specifically made of polyurethane or damping rubber.

By adopting the damping connector 5 in the form of a double-probe screw, the beam end is inserted into the bolt through the hole without obstacles, which is convenient for installation; It is convenient to locate the installation position of the damping column 501 while locking the movable comb plate 2 laterally; the damping column 501 made of polyurethane or damping rubber has good weather resistance, strong compressive ability, and improves the service life of the equipment.

Example 2

An assembled prestressed multi-directional displacement bridge expansion device, compared with the expansion device in Embodiment 1, the main difference is that the installation method of the fixed comb-tooth plate 1 is improved.

The prestressed multi-directional displacement bridge telescopic device of the present invention further comprises a pre-embedded screw sleeve 11 and a screw 12. The embedded screw sleeve 11 is welded and connected to the anchoring rib 10 under the fixed comb-tooth plate 1, and the screw 12 passes through the fixed comb-tooth plate. 1. The upper countersunk head bolt is threaded to the threaded hole of the embedded screw sleeve 11 after passing through the hole.

Specifically, a plurality of annular grooves at equal intervals are provided on the outer cylindrical wall of the embedded screw sleeve 11 .

Through the setting of the embedded screw sleeve 11, the fixed comb-tooth plate 1 is installed by screw connection, which is a detachable structure, which is convenient for maintenance and replacement in the later period. The anchoring area between them, thereby improving the connection strength.

The present invention also discloses a method for installing a prestressed multi-directional displacement bridge expansion device, as shown in Figures 8 to 11 , for installing the above-mentioned assembled pre-stressed multi-directional displacement bridge expansion device, comprising the following steps:

S1. Weld the expansion device with the pre-embedded anchor rib 10 in the reserved groove, that is, the welding and installation of the anchor plate and the pre-embedded screw sleeve 11.

S2, pouring the concrete layer 13 in the reserved groove.

S3. Remove the fixed comb-tooth plate 1 and the movable comb-tooth plate 2, replace it with a temporary transition plate 15, and then spread the asphalt layer 14; the transition plate 15 needs to be determined according to the positions of the fixed comb-tooth plate 1 and the movable comb-tooth plate 2 mounting holes and dimensions.

S4. Replace the transition plate 15 with the fixed comb-tooth plate 1 and the movable comb-tooth plate 2, and tighten the screws and nuts to the set torque range

By using the transition plate 15 as a process aid for asphalt paving, the gaps between the opposing comb plates are effectively protected, and the processes such as grooving and maintenance that are required after asphalt paving are avoided, which saves installation time and improves efficiency. installation efficiency.

The above-mentioned embodiments are only to describe the preferred mode of the present invention, and do not limit the scope of the present invention. On the premise of not departing from the design spirit of the present invention, various modifications made by those of ordinary skill in the art to the technical solutions of the present invention and improvements, all should fall within the protection scope determined by the claims of the present invention.

Claims (10)

1. The utility model provides a multidirectional bridge telescoping device that shifts of prestressing force, includes fixed fishback (1), activity fishback (2) and anchor board, its characterized in that: still include fixed plate (4) and damping connecting piece (5), fixed plate (4) fixed connection be in the anchor board top just is located the lateral wall top at roof beam end expansion joint, activity fishback (2) back below is passed through damping connecting piece (5) are installed on fixed plate (4) top installation breach (402), activity fishback (2) with all leave the gap between installation breach (402) diapire and the lateral wall.

2. The prestressed multidirectional displacement bridge expansion device of claim 1, wherein: the damping connecting piece (5) comprises a screw rod, a locking nut and a damping column (501), the damping column (501) is coaxially compounded in the middle of the screw rod, and two ends of the screw rod penetrate through the movable comb plate (2) and the fixed plate (4) and then are locked by the locking nut.

3. The prestressed multidirectional displacement bridge expansion device of claim 2, wherein: the movable comb plate (2) is provided with an upper clamping groove (201) at the corresponding position of the damping column (501); a lower clamping groove (401) is formed in the corresponding position of the damping column (501) of the fixing plate (4); the upper end and the lower end of the damping column (501) which are vertically arranged enter the upper clamping groove (201) and the lower clamping groove (401) respectively, and the height of the damping column (501) is larger than the sum of the depths of the upper clamping groove (201) and the lower clamping groove (401).

4. The prestressed multidirectional displacement bridge expansion device of claim 3, wherein: the movable comb plate (2) is arranged at the screw mounting position and is provided with a nut counter bore (202), and the locking nut is hidden in the nut counter bore (202).

5. The prestressed multi-directional shifting bridge expansion device of claim 4, wherein: the damping column (501) is made of polyurethane or damping rubber.

6. The prestressed multidirectional shifting bridge expansion device according to any one of claims 1 to 5, wherein: the anchoring plate comprises a right anchoring plate (3) and a left anchoring plate (6) which are connected with anchoring ribs (10), the right anchoring plate (3) is fixedly connected below the fixed comb plate (1), and the left anchoring plate (6) is fixedly connected below the fixed plate (4).

7. The prestressed multidirectional displacement bridge expansion device of claim 6, wherein: the left side of the supporting vertical plate (7) is vertically arranged at the end part of the left anchoring plate (6) and below the fixed plate (4), and the right side of the supporting vertical plate (7) is vertically arranged at the end part of the right anchoring plate (3) and below the fixed comb plate (1).

8. The prestressed multidirectional shifting bridge expansion device according to any one of claims 1 to 5, wherein: still include pre-buried swivel nut (11) and screw (12), pre-buried swivel nut (11) fixed connection anchor muscle (10) of fixed fishback (1) below, screw (12) pass threaded connection behind the countersunk head bolt via hole on fixed fishback (1) pre-buried swivel nut (11) screw thread mesopore.

9. The prestressed multidirectional shifting bridge expansion device of claim 8, wherein: and a plurality of annular grooves at equal intervals are formed in the outer cylindrical wall of the embedded screw sleeve (11).

10. A mounting method of a prestressed multidirectional displacement bridge expansion device is characterized by comprising the following steps: the prestressed multidirectional displacement bridge expansion device for installing the assembled type of the claim 8 or 9 comprises the following steps:

s1, welding the telescopic device with the pre-buried anchor bar (10) in the preformed groove, namely welding and installing the anchor plate and the pre-buried thread sleeve (11);

s2, pouring a concrete layer (13) in the preformed groove;

s3, disassembling the fixed comb plate (1) and the movable comb plate (2), replacing the fixed comb plate and the movable comb plate with a temporary transition plate (15), and paving an asphalt layer (14); the installation and the overall dimension of the transition plate (15) are determined according to the positions of the fixed comb plate (1) and the movable comb plate (2);

and S4, replacing the transition plate (15) with a fixed comb plate (1) and a movable comb plate (2), and tightening the screw and the nut to a set torque range.

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