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

Abstract

The present invention discloses a prestressed multi-directional displacement bridge expansion device, which includes a fixed comb plate, a movable comb plate, an anchor plate, a fixed plate and a damping connecting piece. The fixed plate is fixedly connected to the top of the anchor plate and is located at the top of the side wall of the beam end expansion joint. The rear lower part of the movable comb plate is installed on the installation notch at the top of the fixed plate through a damping connecting piece, and gaps are left between the movable comb 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 to the embedded anchor bars in the reserved groove; S2, pouring the concrete layer in the reserved groove; S3, replacing the temporary transition plate, and then paving the asphalt layer; S4, replacing the transition plate with a fixed comb plate and a movable comb plate, and fastening. The prestressed multi-directional displacement bridge expansion device and its installation method of the present invention can better meet the requirements of multi-directional displacement under complex working conditions of the bridge, simplify the installation process, and improve the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge expansion joints, and particularly relates to a prestressed multi-directional displacement bridge expansion device and an installation method thereof. Background Art

[0002] Bridge expansion joints are provided to meet the requirements of bridge deck deformation. Usually, expansion joints are set between the two beam ends, between the beam end and the abutment, or at the articulated position of the bridge. The bridge expansion joint can adjust the displacement and connection between the superstructures caused by vehicle loads and bridge building materials. The bridge expansion joint should prevent rainwater, garbage, and soil from seeping in and blocking; at the same time, installation, inspection, maintenance, and removal of dirt should be simple and convenient. At the location where the expansion joint is set on the bridge, the railing and the bridge deck pavement should be disconnected.

[0003] There are many types of bridge expansion joints. Among them, the unit type multi-directional displacement comb tooth bridge expansion joint device has a relatively wide application. The unit type multi-directional displacement comb tooth bridge expansion joint device has the advantages of low structural height, wide application range, smooth driving, anti-slip, etc. However, most of the existing unit type multi-directional displacement comb tooth bridge expansion joint devices adopt the method of installing a rotating shaft and a control seat behind the movable comb tooth plate to achieve the angular adaptability of the movable comb tooth plate. It has the disadvantages of complex structure, being not conducive to installation, and poor displacement capacity in other directions except angular displacement.

[0004] 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

[0005] The purpose of the present invention is to provide a prestressed multi-directional displacement bridge expansion device and an installation method thereof, which can better meet the multi-directional displacement requirements under complex bridge working conditions, simplify the installation process, and improve the construction efficiency.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A prestressed multi-directional displacement bridge expansion device of the present invention includes a fixed comb tooth plate, a movable comb tooth plate, and an anchor plate, and further includes a fixed plate and a damping connecting piece. The fixed plate is fixedly connected to the top of the anchor plate and is located at the top of the side wall of the beam end expansion joint. The rear lower part of the movable comb tooth plate is installed on the installation notch at the top of the fixed plate through the damping connecting piece, and gaps are left between the movable comb tooth plate and the bottom wall and side wall of the installation notch.

[0008] Further, the damping connecting piece 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 both ends of the screw rod pass through the movable comb tooth plate and the fixed plate and are locked with the locking nut.

[0009] Further, an upper clamping groove is formed in the movable comb tooth plate at a corresponding position of the damping column; a lower clamping groove is formed in the fixing plate at a corresponding position of the damping column; the upper and lower ends of the vertically arranged damping column respectively enter the upper clamping groove and the lower clamping groove, and the height of the damping column is greater than the sum of the depths of the upper clamping groove and the lower clamping groove.

[0010] Further, a nut counterbore is formed in the movable comb tooth plate at the screw installation position, and the locking nut is hidden in the nut counterbore.

[0011] Further, the damping column is specifically made of polyurethane or damping rubber.

[0012] Further, the anchoring plate includes a right anchoring plate and a left anchoring plate connecting the anchoring bars. The right anchoring plate is fixedly connected below the fixed comb tooth plate, and the left anchoring plate is fixedly connected below the fixing plate.

[0013] Further, a supporting vertical plate is further included. The left supporting vertical plate is vertically arranged at the end of the left anchoring plate and below the fixing plate, and the right supporting vertical plate is vertically arranged at the end of the right anchoring plate and below the fixed comb tooth plate.

[0014] Further, an embedded nut and a screw are further included. The embedded nut is fixedly connected to the anchoring bar below the fixed comb tooth plate, and the screw passes through the countersunk bolt through hole on the fixed comb tooth plate and is threadedly connected to the threaded middle hole of the embedded nut.

[0015] Further, a plurality of annular grooves at equal intervals are arranged on the outer cylindrical wall of the embedded nut.

[0016] The present invention discloses an installation method for a prestressed multi-directional displacement bridge expansion device, which is used to install the above-mentioned assembled prestressed multi-directional displacement bridge expansion device, and includes the following steps:

[0017] S1. Weld the expansion device to the embedded anchoring bars in the reserved groove, that is, the welding installation of the anchoring plate and the embedded nut.

[0018] S2. Pour the concrete layer in the reserved groove.

[0019] S3. Remove the fixed comb tooth plate and the movable comb tooth plate, and replace them with a temporary transition plate, and then pave the asphalt layer; determine the installation and shape dimensions of the transition plate according to the positions of the fixed comb tooth plate and the movable comb tooth plate.

[0020] S4. Replace the transition plate with the fixed comb tooth plate and the movable comb tooth plate, and tighten the screws and nuts to the set torque range.

[0021] Compared with the prior art, the beneficial technical effects of the present invention:

[0022] The prestressed multi-directional displacement bridge expansion device of the present invention is provided with damping connectors, and there are gaps between the damping connectors and the fixed plates, and there is no concrete or asphalt filling contact around, so that the movable comb-shaped plate can have a small amount of movement margin relative to the fixed plate. Furthermore, when the movable comb-shaped plate is subjected to rolling impact, the damping connectors deform and buffer, improving the safe operation performance of the device; compared with the rotation shaft type displacement method, the present invention adopts damping multi-point displacement deformation, with a simplified structure and better adaptability to impact displacement buffering at any local point. By installing rubber thin plates in both gaps, the gaps can be sealed to prevent debris or sundries from entering and affecting displacement buffering. The prestressed multi-directional displacement bridge expansion device of the present invention can better meet the multi-directional displacement requirements under complex bridge working conditions.

[0023] In addition, by welding the right anchor plate under the fixed comb-shaped plate to replace the conventional bolt anchoring form, the connection strength of the fixed comb-shaped plate is improved; by welding and installing the left support vertical plate at the end of the left anchor plate and under the fixed plate, the position of the reserved groove can be determined and concrete debris can be prevented from entering the beam end expansion joint. At the same time, the anchoring strength of both sides of the support vertical plate is increased. By adopting a damping connector in the form of a double-probe screw rod, there is no obstacle for the bolt to pass through the beam end, which is convenient for installation; by correspondingly arranging an upper clamping groove and a lower clamping groove on the movable comb-shaped plate and the fixed plate, it is convenient to position the installation position of the damping column and laterally lock the movable comb-shaped plate; by adopting a damping column made of polyurethane or damping rubber, it has good weather resistance and strong compressive capacity, improving the service life of the device. Through the setting of the embedded screw sleeve, the fixed comb-shaped plate is installed by means of threaded connection, which is a detachable structure and convenient for later maintenance and replacement; by setting an annular groove on the outer cylindrical wall of the embedded screw sleeve, the anchoring area with the concrete is increased, thereby improving the connection strength.

[0024] The installation method of the prestressed multi-directional displacement bridge expansion device of the present invention uses a transition plate as a process auxiliary tool during asphalt paving to effectively protect the gap between the oppositely arranged comb-shaped plates, avoiding processes such as grooving and maintenance required after asphalt paving, saving installation time and improving installation efficiency. Brief Description of the Drawings

[0025] The present invention will be further described below with reference to the drawings.

[0026] Figure 1 It is a schematic installation structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention;

[0027] Figure 2 It is a schematic front view structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention;

[0028] Figure 3Schematic top view structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention;

[0029] Figure 4 Schematic cross-sectional view structure diagram of the movable comb tooth plate of the present invention;

[0030] Figure 5 Schematic cross-sectional view structure diagram of the fixed plate of the present invention;

[0031] Figure 6 Schematic cross-sectional view structure diagram of the damping connecting piece of the present invention;

[0032] Figure 7 Schematic front view structure diagram of Embodiment 2 of the prestressed multi-directional displacement bridge expansion device of the present invention;

[0033] Figure 8 Welding installation schematic diagram of the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention;

[0034] Figure 9 Concrete pouring schematic diagram of the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention;

[0035] Figure 10 Asphalt paving schematic diagram of the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention;

[0036] Figure 11 Assembly completion schematic diagram of the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention.

[0037] Explanation of reference numerals: 1, fixed comb tooth plate; 2, movable comb tooth plate; 201, upper clamping groove; 202, nut countersunk hole; 3, right anchor plate; 4, fixed plate; 401, lower clamping groove; 402, installation notch; 5, damping connecting piece; 501, damping column; 6, left anchor plate; 7, support vertical plate; 8, stainless steel plate; 9, waterproof plate; 10, anchor bar; 11, embedded bushing; 12, screw; 13, concrete layer; 14, asphalt layer; 15, transition plate. Detailed implementation manners

[0038] The core of the present invention is to provide a prestressed multi-directional displacement bridge expansion device and its installation method, which can better meet the multi-directional displacement requirements under complex bridge working conditions, simplify the installation process, and improve the construction efficiency.

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than 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.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0041] Referring to the accompanying drawings, Figure 1 is a schematic installation structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention; Figure 2 is a schematic front view structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention;

[0042] Figure 3 is a schematic top view structure diagram of Embodiment 1 of the prestressed multi-directional displacement bridge expansion device of the present invention; Figure 4 is a schematic cross-sectional view structure diagram of the movable comb tooth plate of the present invention; Figure 5 is a schematic cross-sectional view structure diagram of the fixed plate of the present invention;

[0043] Figure 6 is a schematic cross-sectional view structure diagram of the damping connecting piece of the present invention; Figure 7 is a schematic front view structure diagram of Embodiment 2 of the prestressed multi-directional displacement bridge expansion device of the present invention; Figure 8 is a schematic welding diagram of the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention; Figure 9 is a schematic diagram of pouring concrete in the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention; Figure 10 is a schematic diagram of paving asphalt in the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention; Figure 11 is a schematic diagram of the completed assembly in the installation method of the prestressed multi-directional displacement bridge expansion device of the present invention.

[0044] Embodiment 1:

[0045] As Figures 1 to 6 shown, a prestressed multi-directional displacement bridge expansion device, like the 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 further includes a fixed plate 4 and a damping connecting piece 5. The fixed plate 4 is welded to the top of the anchor plate and is located at the top of the side wall of the beam end expansion joint. The rear lower part of the movable comb tooth plate 2 is installed on the top installation notch 402 of the fixed plate 4 through the damping connecting piece 5, and the installation notch 402 is a rectangular notch. The number of the damping connecting pieces 5 is multiple and they are arranged at equal intervals along the bridge width direction of the movable comb tooth plate 2. There are gaps between the movable comb tooth plate 2 and the bottom wall and side wall of the installation notch 402. Further, rubber thin plates for sealing are installed in both gaps.

[0046] Through the setting of the damping connecting member 5, there are gaps between the damping connecting member 5 and the fixing plate 4, and there is no contact filled with concrete or asphalt around, so that the movable comb-tooth plate 2 can have a small amount of movement margin relative to the fixing plate 4. Furthermore, when the movable comb-tooth plate 2 is subjected to rolling impact, the damping connecting member 5 deforms and buffers, improving the safe operation performance of the equipment; compared with the rotating shaft type displacement method, the present invention adopts damping multi-point displacement deformation, simplifies the structure, and can better adapt to the impact displacement buffer at any local point. By installing rubber thin plates in both gaps, the gaps can be sealed to prevent debris or sundries from entering and affecting the displacement buffer. The prestressed multi-directional displacement bridge expansion device of the present invention can better meet the multi-directional displacement requirements under complex bridge conditions.

[0047] In a specific embodiment, as Figures 1 to 3 shown, the anchoring plate includes a right anchoring plate 3 and a left anchoring plate 6 connecting the embedded anchoring bars 10. The right anchoring plate 3 is welded below the fixed comb-tooth plate 1, and the left anchoring plate 6 is welded below the fixing plate 4.

[0048] Specifically, the prestressed multi-directional displacement bridge expansion device of the present invention further includes a supporting vertical plate 7. The left supporting vertical plate 7 is vertically welded at the end of the left anchoring plate 6 and below the fixing plate 4, and the right supporting vertical plate 7 is vertically welded at the end of the right anchoring plate 3 and below the fixed comb-tooth plate 1.

[0049] By welding the right anchoring plate 3 below the fixed comb-tooth plate 1 to replace the conventional bolt anchoring form, the connection strength of the fixed comb-tooth plate 1 is improved; by welding the left supporting vertical plate 7 at the end of the left anchoring plate 6 and below the fixing plate 4, the position of the reserved groove can be determined and concrete debris can be prevented from entering the beam end expansion joint. At the same time, the anchoring strength of both sides of the supporting vertical plate 7 is increased.

[0050] In a specific embodiment, as Figure 6 shown, the damping connecting member 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. The two ends of the screw rod pass through the movable comb-tooth plate 2 and the fixing plate 4 and are locked with the locking nut.

[0051] Specifically, as Figure 2 , Figure 4 and Figure 5 shown, the movable comb-tooth plate 2 is provided with an upper clamping groove 201 at the corresponding position of the damping column 501. The fixing plate 4 is provided with a lower clamping groove 401 at the corresponding position of the damping column 501. The upper and lower ends of the vertically arranged damping column 501 respectively enter the upper clamping groove 201 and the lower clamping groove 401, and the height of the damping column 501 is greater than the sum of the depths of the upper clamping groove 201 and the lower clamping groove 401.

[0052] Specifically, asFigure 2 and Figure 4 As shown in Figure 4 , a nut counterbore 202 is provided at the screw installation position of the movable comb plate 2, and the locking nut is hidden in the nut counterbore 202.

[0053] Specifically, the damping column 501 is made of polyurethane or damping rubber.

[0054] By adopting the damping connector 5 in the form of a double-probe screw, there is no obstacle for the bolt through-hole at the beam end, which is convenient for installation; by correspondingly arranging the upper clamping groove 201 and the lower clamping groove 401 on the movable comb plate 2 and the fixed plate 4, it is convenient to position the installation position of the damping column 501 and laterally lock the movable comb plate 2; by adopting the damping column 501 made of polyurethane or damping rubber, it has good weather resistance and strong compressive capacity, and improves the service life of the equipment.

[0055] Embodiment 2

[0056] A prefabricated prestressed multi-directional displacement bridge expansion device, the main difference from the expansion device in Embodiment 1 is that the installation method of the fixed comb plate 1 is improved.

[0057] The prestressed multi-directional displacement bridge expansion device of the present invention further includes a pre-embedded screw sleeve 11 and a screw 12. The pre-embedded screw sleeve 11 is welded to the anchor bar 10 below the fixed comb plate 1, and the screw 12 passes through the countersunk bolt through-hole on the fixed comb plate 1 and is threadedly connected to the threaded middle hole of the pre-embedded screw sleeve 11.

[0058] Specifically, a plurality of equally spaced annular grooves are provided on the outer cylindrical wall of the pre-embedded screw sleeve 11.

[0059] Through the setting of the pre-embedded screw sleeve 11, the fixed comb plate 1 is installed by a threaded connection method, which is a detachable structure and is convenient for later maintenance and replacement; by setting annular grooves on the outer cylindrical wall of the pre-embedded screw sleeve 11, the anchoring area with the concrete is increased, thereby improving the connection strength.

[0060] The present invention also discloses a method for installing a prestressed multi-directional displacement bridge expansion device, as Figures 8 to 11 shown, for installing the above-mentioned prefabricated prestressed multi-directional displacement bridge expansion device, including the following steps:

[0061] S1. Weld the expansion device to the pre-embedded anchor bar 10 in the reserved groove, that is, the welding installation of the anchor plate and the pre-embedded screw sleeve 11.

[0062] S2. Pour the concrete layer 13 in the reserved groove.

[0063] S3. Remove the fixed comb plate 1 and the movable comb plate 2 and replace them with the temporary transition plate 15, and then pave the asphalt layer 14; it is necessary to determine the installation holes and the external dimensions of the transition plate 15 according to the positions of the fixed comb plate 1 and the movable comb plate 2.

[0064] S4. Replace the transition plate 15 with the fixed comb plate 1 and the movable comb plate 2, and tighten the screws and nuts to the set torque range.

[0065] By using the transition plate 15 as a process auxiliary tool during asphalt paving, the gaps between the relatively arranged comb plates are effectively protected, avoiding processes such as grooving and maintenance that are still required after asphalt paving, saving installation time and improving installation efficiency.

[0066] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A prestressed multi-directional displacement bridge expansion device, comprising a fixed comb plate (1), a movable comb plate (2) and an anchor plate, characterized in that: It further includes a fixed plate (4) and a damping connecting member (5). The fixed plate (4) is fixedly connected to the top of the anchoring plate and is located at the top of the side wall of the beam end expansion joint. The rear lower part of the movable comb plate (2) is installed on the top mounting notch (402) of the fixed plate (4) through the damping connecting member (5). A gap is left between the movable comb plate (2) and the bottom wall and side wall of the mounting notch (402). The damping connecting member (5) includes 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. The two ends of the screw rod pass through the movable comb plate (2) and the fixed plate (4) and are locked with the locking nut. The movable comb plate (2) is provided with an upper clamping groove (201) at the corresponding position of the damping column (501); the fixed plate (4) is provided with a lower clamping groove (401) at the corresponding position of the damping column (501); the upper and lower ends of the vertically arranged damping column (501) respectively enter the upper clamping groove (201) and the lower clamping groove (401), and the height of the damping column (501) is greater than the sum of the depths of the upper clamping groove (201) and the lower clamping groove (401).

2. The prestressed multi-directional displacement bridge expansion device according to claim 1, characterized in that: The movable comb plate (2) is provided with a nut counterbore (202) at the screw rod installation position, and the locking nut is hidden in the nut counterbore (202).

3. The prestressed multi-directional displacement bridge expansion device according to claim 2, characterized in that: The damping column (501) is specifically made of polyurethane or damping rubber.

4. The prestressed multi-directional displacement bridge expansion device according to any one of claims 1 to 3, characterized in that: The anchoring plate includes a right anchoring plate (3) and a left anchoring plate (6) connected to the connecting anchor bars (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).

5. The prestressed multi-directional displacement bridge expansion device according to claim 4, characterized in that: It further includes a supporting vertical plate (7). The left supporting vertical plate (7) is vertically arranged at the end of the left anchoring plate (6) and below the fixed plate (4), and the right supporting vertical plate (7) is vertically arranged at the end of the right anchoring plate (3) and below the fixed comb plate (1).

6. The prestressed multi-directional displacement bridge expansion device according to any one of claims 1 to 3, characterized in that: It further includes a pre-embedded bushing (11) and a screw (12). The pre-embedded bushing (11) is fixedly connected to the anchor bar (10) below the fixed comb plate (1), and the screw (12) passes through the countersunk bolt through hole on the fixed comb plate (1) and is threadedly connected to the threaded middle hole of the pre-embedded bushing (11).

7. The prestressed multi-directional displacement bridge expansion device according to claim 6, characterized in that: A plurality of annular grooves at equal intervals are arranged on the outer cylindrical wall of the pre-embedded bushing (11).

8. A method for installing a prestressed multi-directional displacement bridge expansion device, characterized in that: The steps for installing the pre-stressed multi-directional displacement bridge expansion device assembled as described in claim 7 above include: S1. Weld the expansion device to the pre-embedded anchor bars (10) in the reserved groove, that is, the welding installation of the anchoring plate and the pre-embedded bushing (11); S2. Pour the concrete layer (13) in the reserved groove; S3. Remove the fixed comb plate (1) and the movable comb plate (2) and replace them with a temporary transition plate (15), and then pave the asphalt layer (14); determine the installation and external dimensions of the transition plate (15) according to the positions of the fixed comb plate (1) and the movable comb plate (2). S4. Replace the transition plate (15) with the fixed comb plate (1) and the movable comb plate (2), and tighten the screws and nuts to the set torque range.

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