Bridge expansion joint structure and construction method thereof

Patent metadata

Field	Value
Publication number	US-12460360-B2
Application number	US-202418951588-A
Country	US
Kind code	B2
Filing date	Nov 18, 2024
Priority date	May 20, 2022
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

The assembly-type bridge expansion joint structure comprises a to-be-connected bridge beam end, wherein a number of the to-be-connected bridge beam end is two, and a groove platform is provided on each of the two beam ends in an extending direction of a gap; a connecting box body, wherein a number of the connecting box body is two, each of the two connecting box bodies is fixedly arranged on the groove platform of the beam end, and a box chamber is provided on opposite side surfaces of the two connecting box bodies respectively, a plurality of box chambers are provided, which are open opposite each other, and the box chamber is provided in the extending direction of the gap; a number of the side beam is two.

First claim

What is claimed is:

1 . An easily maintainable assembly-type bridge expansion joint structure, comprising:
two to-be-connected bridge beam end, wherein a groove platform is provided on each of the two to-be-connected bridge beam ends in an extending direction of a gap; two connecting box bodies, wherein each of the two connecting box bodies is fixedly arranged on the groove platform of each of the two to-be-connected bridge beam end, and a box chamber is provided on opposite side surfaces of the two connecting box bodies respectively, a plurality of box chambers are provided, which are open opposite each other, and the box chamber is provided in the extending direction of the gap; at least one cross beam, wherein the at least one cross beam is connected to the two box bodies via the box chambers respectively, and bottoms of the two ends of the at least one cross beam is connected to an inner bottom plate of the box chamber that is open opposite each other via a first elastic supporting seat respectively; a side beam, wherein a number of the side beam is two, the side beam spans the at least one cross beam in the extending direction of the gap, a bottom of the side beam is connected to a top of the at least one cross beam via a second elastic supporting seat, and a top of the side beam is fixedly connected to a top of the box chamber; at least one middle beam, a bottom of the middle beam is fixedly arranged on the at least one cross beam and located between the two side beams, and two sides of a top of the middle beam are elastically connected to the tops of the two side beams via an elastic telescopic piece respectively, a groove in the extending direction of the gap is formed between the side beam, the elastic telescopic piece and the middle beam, and the groove is configured to be filled with silicone gel; each of the two connecting box bodies comprises an L-shaped full-length steel plate matched with the groove platform in appearance, a displacement box and a concrete platform, a plurality of displacement boxes are provided and a plurality of concrete platforms are provided, the displacement box is arranged in the box chamber on a steel plate at intervals in the extending direction of the gap, and the concrete platform is fixedly installed or poured between adjacent displacement boxes; and a rubber gasket is arranged between the displacement box and the steel plate, the displacement box is connected to a pre-embedded connector of the groove platform via a bolt, the bolt sequentially penetrates through bolt holes on vertical side surfaces of the displacement box, the rubber gasket and the steel plate and is connected to the pre-embedded connector of the groove platform, and the pre-embedded connector comprises a connecting steel bar and an internal threaded sleeve fixedly connected with the connecting steel bar.

2 . The easily maintainable assembly-type bridge expansion joint structure according to claim 1 , wherein both the steel plate and the groove platform are provided with a space filled with concrete mortar between a vertical direction and a horizontal direction, a rubber baffle for sealing the space is arranged at a port of the space in the horizontal direction, and a grouting hole communicated with the space is formed on horizontal bottom side surfaces of the displacement box, the rubber gasket and the steel plate in a penetrating mode and is configured to pour concrete mortar into the space.

3 . The easily maintainable assembly-type bridge expansion joint structure according to claim 2 , wherein the groove platform is fixedly provided with at least one bolt base plate in the space in the horizontal direction, the displacement box, the rubber gasket and the steel plate corresponding to the bolt base plate are penetrated with bolts that move up and down, the bolt abuts against the bolt base plate at a bottom end, and a vertical position height of the displacement box is configured to be adjusted by continuing to tighten the bolt upwards or downwards.

4 . The easily maintainable assembly-type bridge expansion joint structure according to claim 3 , wherein an end of the inner threaded sleeve is provided with a circular rubber pad exposed out of the space in the vertical direction, and an outer end of the circular rubber pad abuts against the vertical side surface of the steel plate; and a chamfer is arranged at L-shaped corners of the displacement box, the rubber gasket and the steel plate.

5 . The easily maintainable assembly-type bridge expansion joint structure according to claim 1 , wherein the top of the box chamber of the displacement box is provided with a detachable box cover, the box cover is connected to a top surface of the box chamber of the displacement box via the bolt, and the box cover is covered with a prefabricated concrete plate or a concrete layer poured to cover the box cover.

6 . The easily maintainable assembly-type bridge expansion joint structure according to claim 5 , wherein a bar-shaped pin is fixedly connected to a bottom of the bolt arranged on the box cover in a penetrating mode, a top end of the box chamber of the displacement box is provided with a fixing plate with a bar-shaped pin hole, and the bar-shaped pin penetrates through the bar-shaped pin hole and is screwed to be in vertical cross buckle connection with the bar-shaped pin hole.

7 . A construction method for an easily maintainable assembly-type bridge expansion joint structure according to claim 1 , comprising the following steps:
constructing an L-shaped stepped groove platform at each of the two to-be-connected bridge beam ends, pre-embedding a pre-embedded connector formed by fixedly connecting a connecting steel bar and an inner threaded sleeve on a vertical side surface of a groove platform, pre-embedding or pasting a circular rubber pad at a port of a pre-embedded connector, and fixedly arranging at least one bolt base plate on a horizontal bottom surface of the groove platform; assembling a displacement box, a rubber gasket and a L-shaped full-length steel plate together with bolts on their respective transverse bottom surfaces to form a connecting box body, using a hoisting machinery to hoist an assembled connecting box body onto the corresponding groove platform at each of the two to-be-connected bridge beam end, so that the connecting box body is placed on the groove platform in an extending direction of a gap and horizontally positioned in front, back, left and right directions; adjusting the bolts at a horizontal bottom surface to abut against the corresponding bolt base plate, and continuing to tighten the bolts to adjust a vertical height position of the displacement box, after reaching a design elevation, fixedly connecting the bolts that sequentially penetrate through bolt holes on vertical side surfaces of the displacement box, the rubber gasket and a steel plate into an internal threaded sleeve of the pre-embedded connector on the groove platform, and abutting the circular rubber pad against an outer side surface of a L-shaped steel plate, so that a space with a certain distance is reserved between the L-shaped steel plate and the groove platform in a horizontal direction and a vertical direction, and arranging a sealing rubber baffle at a port of the space in the horizontal direction; sealing two sides of the space between the steel plate of the connecting box body and the groove platform, and injecting concrete mortar through grouting holes penetrating horizontal bottom surfaces of the displacement box, the rubber gasket and the steel plate until the mortar fills the space and overflows from a top of the space in the vertical direction; arranging the at least one cross beam on inner bottom plates of box chambers of opposite displacement boxes of the two t

Assignees

• Jsti Group
• Nanjing University Of Technology

Inventors

• Liu Duo
• Zhang Jiandong
• Feng Xiaonan
• Liu Runbo
• Yan Chang
• Li Ming

Classifications

• E01D19/06

  Arrangement, construction or bridging of expansion joints ({E01D19/005 takes precedence; in movable bridges E01D15/005 - E01D15/10}; sealing joints not restricted to expansion joints for bridges E04B1/68) · CPC title

• E01D21/00

  Methods or apparatus specially adapted for erecting or assembling bridges · CPC title

• E01D19/062 Primary

  Joints having intermediate beams · CPC title

• E01D19/067 Primary

  Flat continuous joints cast in situ · CPC title