CN215104635U

CN215104635U - Polyurethane telescopic device for bridge

Info

Publication number: CN215104635U
Application number: CN202121046660.5U
Authority: CN
Inventors: 王�琦; 郭建勋; 艾智能; 任茜; 李光浩; 徐建华; 杨自力; 张启祥; 张英虹
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-12-10
Anticipated expiration: 2031-05-17

Abstract

A polyurethane telescoping device for a bridge to ensure that the left and right sides of a telescopic body are stressed and deformed uniformly, the service life of the telescopic body and the whole device is prolonged, and the line operation and maintenance cost is reduced. The guide member comprises left side pipe, guide bar and right side pipe along the vertical central line symmetry setting in roof beam end expansion joint, and the both ends of guide bar extend into respectively in left side pipe, the right side pipe and form the axial with it and slide the cooperation. The anchor component comprises U type component and stock, and U type component extends along beam-ends expansion joint full length, and the stock that the interval set up passes the bottom of U type component and extends into the embedded steel bar welding in the concrete leveling layer by the roof beam body, the outer end and the homonymy U type component fixed connection of left side pipe, right side pipe.

Description

Polyurethane telescopic device for bridge

Technical Field

The utility model relates to a bridge, in particular to polyurethane telescoping device for bridge.

Background

An expansion joint is a structural joint which is arranged to avoid structural damage caused by expansion and contraction of building components due to changes in ambient temperature, and is widely applied to the fields of highways, railways and buildings. Although traditional expansion joint possess environmental protection and fall make an uproar, installation swiftly, design a great deal of advantage such as simple, nevertheless also have simultaneously a lot of not enough, specifically do: the steel structure is mainly adopted, and the steel consumption is large; the waterproof sealing rubber strip is relatively harsh in use environment and is easy to crack and leak under the conditions of water accumulation and repeated freeze thawing; the joint with the beam body is filled with the asphalt base material, and due to the limited property of the asphalt material, the asphalt material is hardened and increased in brittleness at low temperature, is easy to crack to cause leakage, and can generate larger counter force on the structure; at high temperatures, bituminous materials soften and become more plastic, tending to deform irreversibly. In places with large vehicle flow and frequent vehicle braking, such as expressways, ballast tracks, stations, intersections and the like, and in areas with large temperature difference between day and night and four seasons, such as high latitudes, high altitudes and the like, the traditional expansion joints are prone to most easily cause problems, and the service life is greatly reduced.

At present, the more popular seamless expansion device used in China is a 502 asphalt seamless expansion joint which is composed of modified asphalt and crushed stone, and the expansion device has short service life and is easy to damage.

In addition, a seamless formula elastomer telescoping device is disclosed in utility model patent specification of bulletin No. CN201220042973, the device is including the road bed of the area seam body and the road surface layer that covers above that, seam body upper cover has the apron, pre-buried fixing bolt in the pit of the road bed at seam body both ends respectively sets up basement concrete layer, the last cover of fixing bolt has angle steel plate and fixes with the nut, be provided with stabilizing element between the angle steel plate at seam body both ends, fill polymer elastomer filler material in basement concrete layer top until with the road surface layer parallel and level. The device simple structure, construction, maintenance and repair convenient and fast can effectual reduction engineering cost, but has asymmetric arrangement, and the elastomer warp inhomogeneous not enough, with road surface bituminous paving layer junction easy cracking, need often maintain behind the road operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a polyurethane telescoping device for bridge is provided to ensure that the atress of the flexible body left and right sides warp evenly, improve the life of the flexible body and whole device, reduce the line operation maintenance cost.

The utility model provides a technical scheme that its technical problem adopted as follows:

the utility model discloses a polyurethane telescoping device for bridge sets up on the concrete screed-coat of adjacent roof beam body beam-ends, spanes the beam-ends expansion joint, including the seam board of striding that is located polyurethane telescopic body bottom and bury underground at the internal guide member of polyurethane telescopic body, connect the anchor component, the length direction equidistance interval setting at the roof beam-ends expansion joint is followed to the guide component, the both sides and the homonymy anchor component fixed connection of each guide component, the anchor component is connected characterized by with the concrete screed-coat anchor: the guide member consists of a left guide pipe, a guide rod and a right guide pipe which are symmetrically arranged along the vertical central line of the expansion joint of the beam end, and two ends of the guide rod respectively extend into the left guide pipe and the right guide pipe and form axial sliding fit with the left guide pipe and the right guide pipe; the anchor component comprises U type component and stock, and the U type component extends along beam-ends expansion joint full length, and the stock that the interval set up passes the bottom of U type component and extends into the embedded steel bar welding in the concrete leveling layer by the roof beam body, the outer end and the homonymy U type component fixed connection of left side pipe, right side pipe.

In the technical scheme, the U-shaped component is composed of a 1 st angle steel and a 2 nd angle steel which are oppositely overlapped, and through holes for the anchor rod body to pass through are formed in transverse ribs of the 1 st angle steel and the 2 nd angle steel at intervals; and the vertical rib of the 2 nd angle steel is closely attached to the end face of the pavement layer.

In the technical scheme, the seam crossing plates are bilaterally symmetrical in the width direction along the vertical center line of the beam end expansion joint, and positioning pins are welded on the center line of the bottom surface of the seam crossing plates at equal intervals along the length direction of the beam end expansion joint.

The utility model has the advantages that the guide component is a symmetrical structure along the vertical central line of the beam end expansion joint, and the seam crossing plate is symmetrical along the vertical central line of the beam end expansion joint in the width direction, so that the left and right sides of the polyurethane telescopic body can be ensured to be stressed consistently; the anchoring member consists of a U-shaped member and an anchor rod, the anchor rod is welded with an embedded steel bar extending into the concrete leveling layer from the beam body, the anchoring strength is high, and the anchor rod can bear the pulling force generated when the telescopic body stretches; the vertical rib of the 2 nd angle steel in the U-shaped component is closely attached to the end face of the pavement layer, so that the joint of the polyurethane expansion body and the asphalt pavement layer can be effectively prevented from cracking easily; the utility model discloses can effectively improve the life who stretches polyurethane and whole device, reduce circuit operation maintenance cost

Drawings

The specification includes the following four figures:

FIG. 1 is a cross-sectional view of a polyurethane retractor for a bridge of the present invention;

fig. 2 is a plan view of a polyurethane telescopic device for a bridge of the present invention;

FIG. 3 is a schematic structural diagram of a guide member in a polyurethane telescopic device for a bridge according to the present invention;

fig. 4 is an enlarged schematic view of part B of fig. 1.

Notation and meaning in the figures: the beam end expansion joint comprises a beam end expansion joint A, a beam body 10, embedded steel bars 11, a concrete leveling layer 12, a pavement layer 13, a U-shaped member 21, a 1 st angle steel 21a, a 2 nd angle steel 21b, an anchor rod 22, a guide member 23, a left side guide pipe 23a, a guide rod 24b, a right side guide pipe 23c, a seam crossing plate 24, a positioning pin 25 and a polyurethane telescopic body 30.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Referring to fig. 1 and 2, the utility model discloses a polyurethane telescoping device for bridge sets up on the concrete screed-coat 12 of the 10 roof beam ends of adjacent roof beam body, spanes beam-ends expansion joint A, including the guide member 23 that is located the seam board 24 and buries underground in the polyurethane telescoping body 30 of striding of the polyurethane telescoping body 30 bottom, connect the anchor component, guide member 23 sets up along beam-ends expansion joint A's length direction equidistance interval, each guide member 23 both sides and homonymy anchor component fixed connection, anchor component and concrete screed-coat 12 anchor are connected. Referring to fig. 1 and 3, the guide member 23 is composed of a left guide tube 23a, a guide rod 24b and a right guide tube 23c symmetrically arranged along the vertical central line of the beam end expansion joint a, and two ends of the guide rod 24b respectively extend into the left guide tube 23a and the right guide tube 23c and form axial sliding fit with the left guide tube 23a and the right guide tube 23c, so as to ensure that the left side and the right side of the polyurethane telescopic body 30 are stressed uniformly.

Referring to fig. 1 and 4, the anchoring member is composed of a U-shaped member 21 and anchor rods 22, the U-shaped member 21 extends along the entire length of the beam end expansion joint a, the anchor rods 22 arranged at intervals penetrate through the bottom of the U-shaped member 21 and are welded with embedded steel bars 11 extending into the concrete leveling layer 12 from the beam body 10, the outer ends of the left side conduit 23a and the right side conduit 23c are fixedly connected with the U-shaped member 21 on the same side, the anchoring strength is high, and the tension generated when the telescopic body expands and contracts can be borne.

Referring to fig. 4, the U-shaped member 21 is composed of a 1 st angle steel 21a and a 2 nd angle steel 21b which are stacked in opposite directions, through holes for the anchor rods 22 to pass through are formed in transverse ribs of the 1 st angle steel 21a and the 2 nd angle steel 21b at intervals, and vertical ribs of the 2 nd angle steel 21b are closely attached to the end face of the pavement layer 13, so that cracking at a joint of the polyurethane expansion body and the asphalt pavement layer can be effectively avoided.

Referring to fig. 1, the seam crossing plate 24 is symmetrical left and right along the vertical central line of the beam end expansion joint a in the width direction, and the positioning pins 25 are welded on the central line of the bottom surface of the seam crossing plate at equal intervals along the length direction of the beam end expansion joint a, so as to ensure that the left and right sides of the polyurethane expansion body 30 are stressed consistently.

The above description is only used for illustrating some principles of the polyurethane telescopic device for bridge of the present invention, and it is not intended to limit the present invention to the specific structure and application range shown and described, so all the corresponding modifications and equivalents that may be utilized all belong to the claims of the present invention.

Claims

1. A polyurethane expansion device for bridges, arranged on the concrete leveling layer (12) at the beam end of the adjacent beam body (10), across the beam end expansion joint (A), including the polyurethane expansion body (30) The bottom spanning plate (24), the guide member (23) embedded in the polyurethane expansion body (30), the connecting anchor member, the guide member (23) are arranged at equal intervals along the length direction of the beam end expansion joint (A), each Both sides of the guide member (23) are fixedly connected to the same-side anchor member, and the anchor member is anchored to the concrete leveling layer (12). The left catheter (23a), the guide rod (24b) and the right catheter (23c) are symmetrically arranged on the midline, and both ends of the guide rod (24b) extend into the left catheter (23a) and the right catheter (23c) respectively. and form an axial sliding fit with it; the anchoring member is composed of a U-shaped member (21) and an anchor rod (22), and the U-shaped member (21) extends along the beam end expansion joint (A) for the entire length, and is arranged at intervals. The anchor rod (22) passes through the bottom of the U-shaped member (21) and is welded with the embedded steel bar (11) extending from the beam body (10) into the concrete leveling layer (12), the left conduit (23a), the right conduit The outer end of (23c) is fixedly connected with the U-shaped member (21) on the same side.

2. A polyurethane telescopic device for bridges according to claim 1, characterized in that: the U-shaped member (21) is composed of a first angle steel (21a) and a second angle steel (21b) that are superimposed on each other , the transverse ribs of the first angle steel (21a) and the second angle steel (21b) are spaced with through holes for the rod body of the anchor rod (22) to pass through; the vertical ribs of the second angle steel (21b) and the pavement layer (13) ) end face close.

3. A polyurethane expansion device for bridges as claimed in claim 1, characterized in that: the cross-slot plate (24) is left-right symmetrical along the vertical centerline of the beam end expansion joint (A) in the width direction, and Positioning pins (25) are welded at equal intervals along the length direction of the beam end expansion joint (A) on the midline of the bottom surface thereof.