A multi-directional displacement bridge expansion device

Abstract

The present invention discloses a multi-directional displacement bridge expansion and contraction device, wherein a plurality of span steel plates arranged and arranged vertically in the transverse direction of the bridge are embedded in the elastic body of the elastic expansion and contraction member, the span steel plates are arranged in the direction of the bridge, traction steel frames are arranged on the left and right sides thereof, a plurality of tension springs are arranged between the span steel plates and the traction steel frames, the tension springs are hingedly matched with the span steel plates and the traction steel frames; the traction steel frames are connected to the U-shaped channel steels through connectors. A large span steel plate is replaced by a plurality of vertical span steel plates, and each span steel plate is connected to the bridge structure through tension springs, each span steel plate and its corresponding tension spring can be deformed independently, so that the bridge expansion and contraction device can meet the requirements of vertical deformation, horizontal displacement deformation of the transverse bridge, fan-shaped deformation in the transverse bridge direction, and twisting deformation in the transverse bridge direction.

Description

Technical Field

[0001] The invention relates to the technical field of bridge expansion joints, and in particular to a multi-directional displacement bridge expansion device. Background Art

[0002] With the development of national transportation, highways or urban bridges have expanded from two-way four-lane to two-way ten-lane or even twelve-lane. The lateral width of the bridge is much larger than the length of each span along the bridge. Current traffic regulations require large heavy-loaded vehicles to drive on the right. Due to the variable number of vehicles passing and the speed of the vehicles, the bridge expansion joints will produce large vertical deformation and twisting deformation due to the uneven load. At the same time, non-linear bridge expansion joints will also have fan-shaped deformation.

[0003] Although conventional modular or comb plate telescopic devices can partially meet the multi-dimensional displacement requirements, they are prone to damage and require frequent maintenance due to the presence of expansion gaps, large impact from vehicle rolling, and high noise.

[0004] The two major product categories, polymer modified asphalt seamless expansion joints (TST) and polyurethane elastic concrete seamless expansion joints, have small vehicle rolling impact and low noise, but due to structural reasons, they cannot meet the requirements of large vertical deformation or torsional deformation, and therefore have poor durability. Summary of the invention

[0005] In view of the problems existing in the prior art, the main purpose of the present invention is to provide a multi-directional displacement bridge expansion device, aiming to meet the multi-dimensional displacement requirements of the bridge expansion device.

[0006] To achieve the above-mentioned purpose, the multi-directional displacement bridge expansion device proposed in the present invention comprises a sliding steel plate laid on the bridge structure at both ends of the bridge expansion slot, a U-shaped channel steel anchored on the sliding steel plate, and an elastic expansion member spanning above the bridge expansion slot;

[0007] The elastic telescopic member comprises an elastic body cast from an elastic material, wherein a plurality of cross-seam steel plates arranged in a transverse direction of the bridge and arranged vertically are embedded in the elastic body, the cross-seam steel plates are arranged in the direction of the bridge, and traction steel frames are arranged on the left and right sides thereof, a plurality of tension springs are arranged between the cross-seam steel plates and the traction steel frames, and the tension springs are hingedly matched with the cross-seam steel plates and the traction steel frames;

[0008] The traction steel frame is connected to the U-shaped channel steel through a connecting piece.

[0009] Optionally, the connecting member is a plurality of traction screws, which are arranged along the bridge direction, with a first end connected to the traction steel frame, and a second end led out from the elastic body and inserted into the U-shaped channel steel, and locked on the U-shaped channel steel by an adjusting nut.

[0010] Optionally, first hook slots and first screws passing through the first hook slots are provided at both ends of the cross-slot steel plate, and the hook at the first end of the tension spring is hooked on the first screw;

[0011] The traction steel frame is provided with a second hook slot and a second screw passing through the second hook slot, and the hook at the second end of the tension spring is hooked on the second screw.

[0012] Optionally, the traction steel frame is provided with a protrusion extending toward the cross-seam steel plate, and the second hook clamping seam is opened on the protrusion.

[0013] Optionally, it also includes a first axle pin that connects each of the cross-seam steel plates in series, and the center of the cross-seam steel plate is provided with an axle pin hole for the first axle pin to pass through.

[0014] Optionally, the hook at the first end of the tension spring is hooked on a first axle pin exposed outside from adjacent span steel plates.

[0015] Optionally, a second axle pin is provided on the traction steel frame, and the hook at the second end of the tension spring is hooked on the second axle pin.

[0016] Optionally, a fixing nut is provided on the traction steel frame, and the first end of the traction screw is inserted into the fixing nut.

[0017] Optionally, a plurality of first glue holes arranged along the transverse direction of the bridge are opened on the cross-seam steel plate, and a plurality of second glue holes are opened on the traction steel frame.

[0018] Optionally, the upper and lower parts of both ends of the cross-seam steel plate are arc-shaped.

[0019] The present invention embeds a plurality of span steel plates arranged in a transverse direction and arranged vertically inside the elastic body of the elastic telescopic member, arranges the span steel plates along the direction of the bridge, arranges traction steel frames on the left and right sides, arranges a plurality of tension springs between the span steel plates and the traction steel frames, and articulates the tension springs with the span steel plates and the traction steel frames; the traction steel frames are connected to the U-shaped channel steels through connectors. A large span steel plate is replaced by a plurality of vertical span steel plates, and each span steel plate is connected to the bridge structure through tension springs. Each span steel plate and its corresponding tension spring can be deformed independently, so that the bridge telescopic device can meet the requirements of vertical deformation, horizontal displacement deformation of the transverse bridge, fan-shaped deformation in the transverse bridge direction, and twisting deformation in the transverse bridge direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of an embodiment of the present invention;

[0021] Figure 2A top view of an embodiment of the present invention;

[0022] Figure 3 It is a front view of a cross-seam steel plate in one embodiment of the present invention;

[0023] Figure 4 A top view of a cross-seam steel plate in one embodiment of the present invention;

[0024] Figure 5 It is a structural schematic diagram of a traction steel frame in one embodiment of the present invention;

[0025] Figure 6 is a cross-sectional view of another embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the connection between the tension spring, the cross-seam steel plate and the traction steel frame in another embodiment of the present invention;

[0027] Figure 8 A top view of another embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of a plurality of cross-seam steel plates connected in series in another embodiment of the present invention;

[0029] Fig.10 It is a front view of a cross-seam steel plate in another embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please refer to the instruction manual Figure 1 In an embodiment of the present invention, a multi-directional displacement bridge expansion device is proposed, which includes a sliding steel plate 400 laid on the bridge structure 101 at both ends of the bridge expansion slot, a U-shaped channel steel 300 anchored on the sliding steel plate 400, and an elastic expansion member 200.

[0033] The sliding steel plate 400 is used as the bottom support, and the gap between it and the bridge structure 101 is filled with self-flowing epoxy mortar to form a concrete layer 102 for firmly installing the support foundation. The part of the sliding steel plate 400 away from the bridge expansion notch is anchored on the concrete layer 102 together with the U-shaped channel steel 300 by the anchor bolts 310.

[0034] The elastic telescopic member 200 is arranged across the bridge expansion slot, and includes an elastic body cast by an elastic material. Specifically, the elastic material can be a composite of one or more of thermosetting modified epoxy resin, thermosetting polyurethane resin, thermosetting modified silicone resin, thermosetting modified acrylic resin, thermoplastic elastomer, and modified asphalt.

[0035] A plurality of span steel plates 210 arranged in a transverse direction and arranged vertically are embedded in the middle of the elastic body. Each span steel plate 210 is arranged along the bridge direction, and a traction steel frame 230 is arranged on its left and right sides respectively. Each span steel plate 210 is connected to the traction steel frame 230 through a tension spring 220, and the tension spring 220 is hingedly matched with the span steel plate 210 and the traction steel frame 230.

[0036] The traction steel frame 230 is connected to the U-shaped channel steel 300 via a connecting piece.

[0037] The gaps between the two ends of the elastic body and the asphalt pavement of the bridge expansion slot are filled with elastic polymer mortar 500 to achieve seamless expansion device.

[0038] In this embodiment, a large span steel plate 210 is replaced by a plurality of upright span steel plates 210, and each span steel plate 210 is connected to the bridge structure 101 through a tension spring 220. Each span steel plate 210 and its corresponding tension spring 220 can be deformed independently, so that the bridge expansion device can meet the requirements of vertical deformation, horizontal misalignment deformation of the transverse bridge, fan-shaped deformation of the transverse bridge, and torsional deformation of the transverse bridge.

[0039] Specifically, the principle of vertical deformation is: when the bridge structure 101 on both sides of the bridge expansion slot is displaced up and down, the elastic expansion member 200 is in a tightened state, and one end of the middle cross-seam steel plate 210 will tilt at a certain angle. At the same time, the tension springs 220 on the left and right sides of the cross-seam steel plate 210 and the connection between the cross-seam steel plate 210 rotate relative to each other. Therefore, under the special flexibility of the elastic material, the expansion member naturally deforms into a bending curve transitioned from a circular arc, meeting the requirements for smooth driving of the vehicle.

[0040] Principle of horizontal dislocation deformation of the cross bridge: adjacent cross-seam steel plates 210 are flexibly connected only by elastic materials, and the tension spring 220 is hingedly matched with the cross-seam steel plates 210 and the traction steel frame 230. Therefore, under the special flexibility of the elastic material, the elastic telescopic member 200 can achieve horizontal dislocation deformation of the cross bridge.

[0041] Principle of transverse bridge fan-shaped deformation: Under natural conditions, the bending arc-shaped expansion and contraction deformation of the outer side of the overpass curve or curved curved bridge is greater than that of the inner side, and fan-shaped deformation requirements appear in the transverse bridge direction. Since each set of cross-seam steel plates 210 and tension springs 220 are connected in an independent hinged manner, each cross-seam steel plate 210 and tension spring 220 can independently perform expansion and contraction deformation, thereby enabling the elastic telescopic member 200 to achieve the transverse bridge direction fan-shaped deformation requirements.

[0042] Principle of transverse bridge distortion: When a large or heavy-loaded vehicle is driving by, the change in the bridge deck load will naturally cause distortion in the transverse direction of the bridge. Since each set of cross-seam steel plates 210 and tension springs 220 are connected in an independent hinged manner, each cross-seam steel plate 210 and tension spring 220 can independently perform telescopic deformation, so that under the special flexibility of the elastic material, the elastic telescopic member 200 can flexibly deform along with the transverse distortion of the bridge structure 101.

[0043] In this embodiment, the connecting member is a plurality of traction screws 240, each of which is arranged along the bridge direction, with a first end connected to the traction steel frame 230, and a second end drawn out from the elastic body and inserted into the U-shaped channel steel 300, and locked on the U-shaped channel steel 300 by the adjusting nut 241. Therefore, when installing the elastic telescopic member 200, the traction screw 240 can be driven by screwing the adjusting nut 241 to pre-tension the tension spring 220, so that the tension spring 220 can still provide a certain tension when the elastic telescopic member 200 retracts, thereby limiting the elastic body to be compressed only in the horizontal plane without arching deformation.

[0044] In this embodiment, a first hook slot 210a and a first screw passing through the first hook slot 210a are provided at both ends of the cross-slot steel plate 210. A protrusion 230a corresponding to each cross-slot steel plate 210 is provided on the traction steel frame 230, and a second hook slot 230a is provided on each protrusion 230a, and a second screw passing through the second hook slot 230a is provided on the protrusion 230a. During construction, the hook at the first end of the tension spring 220 is hooked on the first screw, and the hook at the second end of the tension spring 220 is hooked on the second screw, thereby realizing the hinge connection between the tension spring 220 and the cross-slot steel plate 210 and the traction steel frame 230, so that the tension spring 220 can deflect in the transverse direction and rotate vertically relative to the cross-slot steel plate 210 and the traction steel frame 230, providing the possibility for the elastic telescopic member 200 to meet the vertical deformation, horizontal displacement deformation of the cross bridge, fan-shaped deformation of the cross bridge, and twisting deformation of the cross bridge.

[0045] Optionally, in this embodiment, a plurality of first glue holes 210b are provided in the cross-bridge direction on the cross-seam steel plate 210, so that the upper part of the cross-seam steel plate 210 can be wrapped and bonded by the elastic material during casting, so as to facilitate the overall rotation or displacement deformation. At the same time, a plurality of second glue holes 230c are provided on the traction steel frame 230, so as to facilitate the elastic material to penetrate and wrap the traction steel frame 230.

[0046] Optionally, in this embodiment, the upper and lower ends of the cross-seam steel plate 210 are both arc-shaped. Therefore, when the cross-seam steel plate 210 tilts and rotates, it will not generate a thrust force on the elastic material of the top layer to cause local arching, nor will it generate a large friction resistance with the sliding steel plate 400.

[0047] Example 2

[0048] Please refer to the instruction manual Figure 6-9 In the embodiment of the present invention, another multi-directional displacement bridge expansion device is proposed. The difference from the embodiment 1 is that the cross-seam steel plate 210 and the traction steel frame 230 in this embodiment are different in structure, and the rest are the same, which will not be described one by one here.

[0049] Specifically, in this embodiment, the cross-seam steel plates 210 are connected in series through a first axis pin 211 , and an axis pin hole 210 c for the first axis pin 211 to pass through is provided at the center of the cross-seam steel plates 210 .

[0050] The traction steel frame 230 is a rectangular square tube, in which a second axle pin 231 is arranged, and a fixing nut 232 is welded on the square tube to match the traction screw 240, and the first end of the traction screw 240 is inserted into the nut. At the same time, the wall of the rectangular square tube is also provided with a second glue hole 230c that is conducive to the penetration and wrapping of the elastic material, and a round hole for the extension spring 220 hook to be inserted.

[0051] In this embodiment, the hook at the first end of the tension spring 220 is hooked on the first axle pin 211 exposed in the gap of the cross-seam steel plate 210; the hook at the second end of the tension spring 220 is inserted into the rectangular square tube and is penetrated and fixed in the rectangular square tube by the second axle pin 231 in the rectangular square tube.

[0052] Compared with Example 1, the tension spring 220 and the cross-seam steel plate 210, and the tension spring 220 and the cross-seam steel plate 210 only need to be hinged through the first axle pin 211 and the second axle pin 231, which has a simple structure and is easy to implement.

[0053] The first axle pin 211 can act as a rotation axis when the bridge structures 101 at both ends are deformed vertically or twisted; at the same time, it plays a role of local auxiliary support for the elastic material between the span steel plates 210 at the gaps in the middle of the bridge structures 101 at both ends.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional displacement bridge expansion device, comprising a sliding steel plate laid on a bridge structure at both ends of a bridge expansion slot, a U-shaped channel steel anchored on the sliding steel plate, and an elastic expansion member spanning above the bridge expansion slot; It is characterized in that The elastic telescopic member comprises an elastic body cast from an elastic material, wherein a plurality of cross-seam steel plates arranged in a transverse direction of the bridge and arranged vertically are embedded in the elastic body, the cross-seam steel plates are arranged in the direction of the bridge, and traction steel frames are arranged on the left and right sides thereof, a plurality of tension springs are arranged between the cross-seam steel plates and the traction steel frames, and the tension springs are hingedly matched with the cross-seam steel plates and the traction steel frames; The traction steel frame is connected to the U-shaped channel steel via a connecting piece; The cross-seam steel plate is provided with a plurality of first glue holes arranged along the transverse direction of the bridge, and the traction steel frame is provided with a plurality of second glue holes; The connecting member is a plurality of traction screws, which are arranged along the bridge direction, with a first end connected to the traction steel frame, a second end led out from the elastic body and inserted into the U-shaped channel steel, and locked on the U-shaped channel steel by adjusting nuts; The two ends of the cross-seam steel plate are provided with a first hook slot and a first screw passing through the first hook slot, and the hook at the first end of the tension spring is hooked on the first screw; The traction steel frame is provided with a second hook slot and a second screw passing through the second hook slot, and the hook at the second end of the tension spring is hooked on the second screw.

2. The multi-directional displacement bridge expansion device according to claim 1, It is characterized in that The traction steel frame is provided with a protrusion extending toward the cross-seam steel plate, and the second hook clamping seam is opened on the protrusion.

3. The multi-directional displacement bridge expansion device according to claim 1, It is characterized in that It also includes a first axle pin that connects each of the cross-seam steel plates in series, and axle pin holes for the first axle pin to pass through are provided at the centers of the cross-seam steel plates.

4. The multi-directional displacement bridge expansion device according to claim 3, It is characterized in that The hook at the first end of the tension spring is hooked on a first shaft pin exposed outside from the adjacent span steel plates.

5. The multi-directional displacement bridge expansion device according to claim 4, It is characterized in that The traction steel frame is provided with a second axle pin, and the hook at the second end of the tension spring is hooked on the second axle pin.

6. The multi-directional displacement bridge expansion device according to claim 1, It is characterized in that The traction steel frame is provided with a fixing nut, and the first end of the traction screw rod is inserted into the fixing nut.

7. The multi-directional displacement bridge expansion device according to claim 1, It is characterized in that The upper and lower parts of both ends of the cross-seam steel plate are in arc shape.

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