Buckle type rotating hinge structure for arch feet and arch supports of steel arch frame

Abstract

The utility model relates to a buckle type rotating hinge structure of an arch foot and an arch support of a steel arch frame, the arch foot end of the steel arch frame is supported on the arch support, a shaft rod is fixedly arranged on the arch support in the transverse bridge direction, an arc-shaped sliding plate is fixedly arranged at the arch foot end of the arch frame in the transverse bridge direction, the radian of the arc-shaped sliding plate is 120-180 degrees, and the arch foot end of the steel arch frame is fixedly connected with the shaft rod. The arc radius of the inner arc face of the arc-shaped sliding plate is equal to the radius of the shaft rod, and the inner arc face of the arc-shaped sliding plate is completely supported on the shaft rod and can axially rotate around the shaft rod. On one hand, the contact face of the arch frame and the hinged end of the arch support is increased, excessive concentration of stress on the arch support and arch feet of the arch frame is avoided, the arch support and the arch frame can be effectively protected, on the other hand, the arc-shaped sliding plate can longitudinally slide along the shaft rod, when the arch frame is dismantled, the whole arch frame can be pushed and slid to the outer side of a bridge, and the arch frame is convenient to dismantle.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and relates to a steel arch frame used for the construction of reinforced concrete arch bridges, in particular to a buckle type hinge structure of an arch foot and an arch seat of the steel arch frame. Background Art

[0002] During the pouring construction of a box-type reinforced concrete arch bridge, a steel arch frame needs to be erected under the bridge as a temporary support structure for the arch bridge construction. The steel arch frame generally adopts an assembled truss structure, with the arch feet at both ends supported on the arch seat, and the wet weight of the arch bridge concrete poured on the arch frame is transferred to the arch seat.

[0003] The arch foot end of the arch frame is usually hinged to the arch seat, and ear plates are generally welded on both sides of the end of the arch foot section, and embedded ear plates are set on the arch seat. The arch frame and the ear plates on the arch seat are connected by a rotating shaft, which has the following problems: First, the force on the hinged ear plate is too concentrated, and because the arch seat has a certain slope, the ear plate is subjected to a large downward tension. For this reason, the embedded structure on the arch seat needs special reinforcement treatment. After the construction is completed, the ear plate needs to be cut off and the arch seat concrete needs to be repaired, which will have an adverse effect on the arch seat structure; second, when the arch frame is dismantled after the arch bridge is cast, the arch frame cannot be moved horizontally to the outside of the bridge due to the obstruction of the ear plate, and can only be dismantled in situ under the bridge, but the space under the bridge is limited and large machinery cannot be used, resulting in low dismantling construction efficiency. Summary of the invention

[0004] The utility model aims to solve the above problems and provide a buckle type hinge structure of the arch foot and the arch seat of a steel arch frame, so as to avoid affecting the arch seat structure and facilitate the later dismantling of the arch frame.

[0005] The technical solution of the utility model is as follows:

[0006] A snap-on hinge structure of an arch foot and an arch seat of a steel arch frame, wherein the arch foot end of the steel arch frame is supported on the arch seat, and is characterized in that: an axle rod is fixedly arranged in a transverse direction on the arch seat, and an arc-shaped slide plate is fixedly arranged in a transverse direction on the arch foot end of the arch frame, the arc of the arc-shaped slide plate is 120° to 180°, the arc radius of the inner arc surface of the arc-shaped slide plate is equal to the radius of the axle rod, and the inner arc surface of the arc-shaped slide plate is completely supported on the axle rod and can rotate axially around the axle rod.

[0007] The utility model provides an arc-shaped slide plate at the end of the arch foot section of the arch frame, and the arc-shaped slide plate is buckled on the shaft rod on the arch seat hinge seat. On the one hand, the contact surface between the arch frame and the hinged end of the arch seat is increased to avoid excessive concentration of force on the arch seat and the arch foot of the arch frame, thereby effectively protecting the arch seat and the arch frame. On the other hand, the arc-shaped slide plate can slide longitudinally along the shaft rod. When the arch frame is dismantled, the arch frame can be pushed and slid as a whole to the outside of the bridge, which is convenient for dismantling the arch frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a side view of the hinged structure of the utility model along the bridge direction;

[0009] Figure 2 yes Figure 1 A magnified view of the hinged structure between the middle arch frame and the arch seat;

[0010] Figure 3 It is a structural schematic diagram of an arch foot section of an arch frame of the utility model. DETAILED DESCRIPTION

[0011] like Figure 1 , Figure 2 , Figure 3 As shown, the arch foot end of the steel arch frame 1 is supported on the arch seat 2, and an axle rod 3 is fixedly arranged in the transverse direction on the arch seat. An arc-shaped slide plate 4 is fixedly arranged in the transverse direction of the arch foot end of the arch frame 1, and the arc of the arc-shaped slide plate 4 is 120° to 180°. The arc radius of the inner arc surface of the arc-shaped slide plate is equal to the radius of the axle rod, and the inner arc surface of the arc-shaped slide plate 4 is completely supported on the axle rod 3 and can rotate around the axial direction of the axle rod.

[0012] During the specific implementation of the utility model, in order to install and fix the shaft rod 3, a hinge seat can be provided on the arch seat, and the hinge seat includes an anchor beam 5 arranged in a transverse direction, the bottom surface of the anchor beam 5 is welded to the embedded part 6 on the arch seat, and a load-bearing beam 7 is welded in a transverse direction to the top surface of the anchor beam 5, and an arc groove is provided in the transverse direction on the top of the load-bearing beam 7, and the bottom surface of the shaft rod 3 is welded in the arc groove on the load-bearing beam 7.

[0013] Since one side of the arch seat installation hinge seat is a sloped surface, the anchor beam has a certain angle with the horizontal plane. In order to further fix the anchor beam, multiple vertical support rods 8 can be arranged under the anchor beam 5, and the lower end of each vertical support rod 8 is welded to the embedded part on the arch seat 2, and the upper end of each vertical support rod 8 is welded to the anchor beam 5.

[0014] The steel arch frame 1 is a truss structure, including two upper chords and two lower chords, and a web is welded between the upper and lower chords; in order to install and fix the arc-shaped slide plate 4, a triangular brace is welded between the two upper chords at the arch foot end of the steel arch frame and the lower chords thereunder, respectively, and each triangular brace includes two diagonal braces 9, one end of the two diagonal braces 9 is respectively welded to the upper chord and the lower chord of the arch frame, and the other end of the two diagonal braces 9 is respectively welded to the outer arc surface of the arc-shaped slide plate 4.

[0015] Furthermore, in order to increase the strength of the triangular support and its connection strength with the arc-shaped slide plate, a reinforcing plate 10 can be welded between the outer side surfaces of the two diagonal support rods 9 of each triangular support, and one end of the reinforcing plate 10 can be set to an arc shape and welded to the outer arc surface of the arc-shaped slide plate 4.

[0016] Furthermore, at least two connecting rods 11 may be welded between the inner sides of the diagonal braces of the two triangular braces, and a plurality of stiffening plates 12 may be welded between a connecting rod 11 close to the arc-shaped slide plate and the outer arc surface of the arc-shaped slide plate 4 .

[0017] The steel arch frame is usually composed of multiple truss segments. When the steel arch frame of the utility model is used, the oblique pull and buckle method can be used for installation, the arc-shaped slide plate of the arch frame segment is supported on the arch seat shaft rod, and the arch foot segment of the arch frame is buckled and hung by the buckle rope, and then the subsequent segments are assembled in sequence. During the assembly process of the arch frame, the arc-shaped slide plate of the arch foot segment can be rotated around the shaft rod by tensioning or loosening the buckle rope, so as to adjust the line shape of the arch frame as needed.

[0018] After the construction of the arch bridge is completed, when the arch frame needs to be dismantled, the top support or unloading device of the arch frame can be lowered, and the arch frame can be pushed forward by the cross bridge to make the arc-shaped slide slide axially along the shaft rod, and the arch frame can be pushed as a whole to the outside of the bridge for dismantling.

Claims

1. A buckle-type hinge structure between an arch foot and an arch seat of a steel arch frame, wherein the arch foot end of the steel arch frame is supported on the arch seat, characterized in that: An axle rod is fixedly arranged on the arch seat in the transverse direction, and an arc-shaped slide plate is fixedly arranged on the arch foot end in the transverse direction. The arc of the arc-shaped slide plate is 120° to 180°, and the arc radius of the inner arc surface of the arc-shaped slide plate is equal to the radius of the axle rod. The inner arc surface of the arc-shaped slide plate is completely supported on the axle rod and can rotate axially around the axle rod.

2. The buckle-type hinge structure of the arch foot and the arch seat of the steel arch frame according to claim 1 is characterized in that: A hinge seat is provided on the arch seat, and the hinge seat includes an anchor beam arranged in a transverse direction. The bottom surface of the anchor beam is welded to the embedded parts on the arch seat, and a load-bearing beam is welded to the top surface of the anchor beam in a transverse direction. An arc groove is provided in the transverse direction on the top of the load-bearing beam, and the bottom surface of the shaft rod is welded in the arc groove on the load-bearing beam.

3. The buckle-type hinge structure of the arch foot and the arch seat of the steel arch frame according to claim 2 is characterized in that: A plurality of vertical support rods are arranged below the anchoring beam, the lower end of each vertical support rod is welded to the embedded part on the arch seat, and the upper end of each vertical support rod is welded to the anchoring beam.

4. The buckle-type hinge structure of the arch foot and the arch seat of the steel arch frame according to claim 1 is characterized in that: The steel arch frame is a truss structure, including two upper chords and two lower chords, with a web welded between the upper and lower chords. A triangular brace is welded between the two upper chords at the arch foot end of the steel arch frame and the lower chords thereunder, respectively. Each triangular brace includes two diagonal braces, one end of the two diagonal braces is respectively welded to the upper chord and the lower chord of the arch frame, and the other end of the two diagonal braces is respectively welded to the outer arc surface of the arc-shaped slide plate.

5. The buckle-type hinge structure of the arch foot and the arch seat of the steel arch frame according to claim 4 is characterized in that: A reinforcing plate is welded between the outer side surfaces of the two oblique bracing rods of each triangular brace, and one end of the reinforcing plate is arc-shaped and welded to the outer arc surface of the arc-shaped slide plate.

6. The buckle-type hinge structure of the arch foot and the arch seat of the steel arch frame according to claim 4 is characterized in that: At least two connecting rods are welded between the inner sides of the oblique supporting rods of the two triangular supports, wherein a plurality of stiffening plates are welded between a connecting rod close to the arc-shaped slide plate and the outer arc surface of the arc-shaped slide plate.

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