CN217733724U

CN217733724U - Novel structure for steel arch rib and concrete bridge deck tie beam consolidation of arch bridge

Info

Publication number: CN217733724U
Application number: CN202220891148.9U
Authority: CN
Inventors: 周建波; 张根
Original assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Current assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-11-04
Anticipated expiration: 2032-04-18

Abstract

The utility model provides a novel structure of steel arch rib and concrete bridge face tie beam consolidation for arch bridge, include: the steel arch rib wallboard is welded to the top surface of the pressure-bearing diffusion plate, the pressure-bearing diffusion plate is located on the top end surface of the concrete tie beam, and the shear plate and the shear nails are pre-embedded in the concrete tie beam; the shear plates and the shear nails are arranged along the bridge direction and the transverse bridge direction at intervals, and are welded on the bottom surface of the pressure-bearing diffusion plate. The advantages are that: the end part of the concrete bridge deck system beam does not need to specially increase the size of the arch springing, the structural structure is simplified, the construction difficulty is reduced, the concrete pouring and vibrating quality is ensured, the reliability of force transmission between the steel arch rib and the concrete system beam is ensured, and the safety of the bridge is improved; the utility model discloses the knot structure is succinct, construction convenience, safe and reliable, respond well.

Description

Novel structure for steel arch rib and concrete bridge deck tie beam consolidation of arch bridge

Technical Field

The utility model belongs to the technical field of the bridge construction technique and specifically relates to a novel structure that steel arch rib and concrete bridge face tie beam concretion encircle the bridge.

Background

At present, for a low-bearing arch bridge with medium span in China, except that arch ribs adopt steel structures, in order to save engineering investment, bridge deck structures often adopt a concrete structure form; for the consolidation structure of steel arch rib and concrete bridge face tie beam, according to traditional design custom, often stretch into the steel arch rib concrete tie beam inside, design for "bayonet" connection form, this kind of connection mode mainly has following drawback: 1. in order to meet the requirement of the insertion length of the arch rib, the end part of the tie beam is always required to be increased in size, so that the arch foot is large in scale and not attractive in appearance; 2. the arch rib is inserted into the concrete, the structure is complex, the circulation and vibration difficulty of the concrete in the pouring process can be increased by the arch rib wall plate, a hollow valley is easily formed at a corner position to influence the pouring quality of the concrete, the stress concentration phenomenon is easily formed in the concrete, potential safety hazards exist, and self-checking is difficult; 3. the internal force of the steel arch rib is completely transmitted to the arch springing concrete through the shear keys on the wall plate, and the shear keys need to be arranged for a long time, so that the saddle-shaped stress characteristic of a shear key group is more prominent, and the material utilization rate is low; 4. in the process of force transmission of the steel arch rib, concrete outside the steel arch rib can be dragged by local tensile stress and is easy to crack, and reinforcing steel bars parallel to the steel arch rib need to be uniformly arranged along the periphery of the steel arch rib.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel structure of steel arch rib and concrete bridge face tie beam consolidation for encircleing the bridge has avoided the steel arch rib wallboard to insert inside the concrete tie beam, and the concrete tie beam tip need not to increase the size scale, has also significantly reduced the influence of steel arch rib wallboard to the concrete placement process, does benefit to assurance concrete placement quality.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

a novel structure for reinforcing steel arch ribs and concrete bridge deck tie beams of an arch bridge comprises: the steel arch rib wall plate comprises a steel arch rib wall plate, a pressure-bearing diffusion plate, a shear plate and shear nails, wherein the lower part of the steel arch rib wall plate is welded on the top surface of the pressure-bearing diffusion plate, the pressure-bearing diffusion plate is positioned on the top end surface of a concrete tie beam, and the shear plate and the shear nails are pre-embedded in the concrete tie beam;

the shear plates and the shear nails are arranged along the bridge direction and the transverse bridge direction at intervals, and are welded on the bottom surface of the pressure-bearing diffusion plate.

Preferably, the shear plate is uniformly provided with pin holes for inserting shear steel bars.

Preferably, the steel arch rib wall plate has a rectangular section or a circular section, and the pressure-bearing diffusion plate is matched with the steel arch rib wall plate in section.

The utility model discloses a novel structure that steel arch rib and concrete bridge face tie beam concretion for encircle bridge, its advantage is: the internal force of the steel arch rib can be smoothly transferred to the concrete bridge deck tie beam, the steel arch rib does not need to extend into the concrete tie beam, the end part of the concrete bridge deck tie beam does not need to specially enlarge the size of the arch foot, the structural structure is simplified, the construction difficulty is reduced, the concrete pouring and vibrating quality is ensured, the reliability of force transfer between the steel arch rib and the concrete tie beam is ensured, and the bridge safety is improved; the utility model discloses the knot structure is succinct, and construction convenience, safe and reliable, respond well.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 and fig. 2 are schematic front and side longitudinal sectional structural views of a novel structure for reinforcing steel arch ribs and concrete bridge deck tie beams of an arch bridge according to the present invention;

FIG. 3 and FIG. 4 are schematic cross-sectional views along the directions A-A and B-B in FIG. 1, respectively;

wherein:

the concrete beam comprises a steel arch rib wallboard 1, a pressure-bearing diffusion plate 2, a shear plate 3, shear nails 4, a concrete tie beam 5 and shear steel bars 6.

Detailed Description

The preferred embodiments of the present invention will be described hereinafter with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are merely for purposes of illustration and explanation, and are not intended to limit the present invention.

According to fig. 1-4 show, for with steel arch rib internal force respectively through the form dispersion transmission to the concrete tie beam of pressure-bearing diffuser plate and horizontal shear structure, the utility model relates to a novel structure of steel arch rib and concrete bridge face tie beam consolidation for encircleing the bridge includes: the steel arch rib wall plate comprises a steel arch rib wall plate 1, a pressure-bearing diffusion plate 2, a shear plate 3 and shear nails 4, wherein the lower part of the steel arch rib wall plate 1 is welded on the top surface of the pressure-bearing diffusion plate 2, the pressure-bearing diffusion plate 2 is positioned on the top end surface of a concrete tie beam 5, and the shear plate 3 and the shear nails 4 are pre-embedded in the concrete tie beam 5; the shear plates 3 and the shear nails 4 are arranged along the bridge direction and the transverse bridge direction at intervals, and the shear plates 3 and the shear nails 4 are welded on the bottom surface of the pressure-bearing diffusion plate 2.

In this embodiment, the steel arch rib wall plate 1 has a rectangular or circular cross section, the pressure-bearing diffusion plate 2 may have a zigzag or circular planar structure according to the cross section of the steel arch rib wall plate 1, the thickness may be determined according to the force transmission requirement of the vertical component of the internal force (the vertical component is pressure) of the steel arch rib wall plate 1, and the pressure-bearing diffusion plate 2 mainly functions to transmit the vertical compressive stress of the arch rib to the concrete tie beam 5 after being diffused by the pressure-bearing diffusion plate 2, and to ensure that the compressive stress of the concrete tie beam 5 does not exceed the limit;

in a specific embodiment, in order to transmit the horizontal component of the internal force of the arch rib to the concrete tie beam 5 in a shearing manner, pin holes are uniformly formed in the shear plate 3 and used for inserting the shear steel bars 6; namely, the shear plate 3, the shear steel bar 6 and the shear nail 4 form a horizontal shear-resistant force-transmission structure together; furthermore, the shear plate 3 is a PBL shear plate 3, and the shear steel bar 6 is a PBL shear steel bar 6; in the specific operation process, the pressure-bearing diffusion plate 2, the shear plate 3, the shear reinforcing steel bars 6 and the shear nails 4 need to be welded and assembled in advance, then fixed at the designed position, and then concrete is poured, so that the accurate pre-embedding position is required.

The utility model discloses an in, shear force reinforcing bar 6 the PLB shear key is constituteed jointly to shear plate 3, the horizontal component of 1 internal force of steel arch rib wallboard is transmitted jointly to shear force nail 4 and PLB shear key. The vertical component force of the steel arch rib wall plate 1 is mainly diffused by the pressure-bearing diffusion plate 2, so that the pressure-bearing area of the concrete tie beam 5 is increased, the pressure stress is reduced, the pressure-bearing requirement of the concrete tie beam 5 is met, and the specific thickness of the pressure-bearing diffusion plate 2 can be calculated and determined according to the force transmission requirement of the vertical component force of the steel arch rib wall plate 1; the horizontal component of the steel arch rib wall plate 1 is mainly transmitted to the concrete tie beam 5 through the PBL shear key and the shear nails 4.

The utility model discloses a realize like this:

the pressure-bearing diffusion plate 2, the shear plate 3, the shear nails 4 and the steel arch rib wall plate 1 (arch foot sections) are welded and assembled in advance to ensure the assembly precision requirement, then the steel arch rib wall plate is firmly fixed at the designed position, the shear steel bars 6 penetrate through the pin holes, and finally bridge deck tie beam concrete is poured. After the pin hole diameter on the shear plate 3 passes through the shear steel bar 6, the residual hole diameter is large enough to allow the concrete coarse aggregate to pass through. In the process, the shear nails 4 should be uniformly arranged along the longitudinal bridge direction and the transverse bridge direction as much as possible, and if the shear nails are interfered with the reinforcing steel bars inside the concrete tie beam 5, the positions of the shear nails 4 can be properly moved.

The principles and structures not explicitly described in the present invention are available to those skilled in the art according to conventional technical means, and therefore are not described in detail.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A novel structure for steel arch rib and concrete bridge deck tie beam consolidation of arch bridge, which is characterized in that: the concrete beam is characterized by comprising a steel arch rib wallboard (1), a pressure-bearing diffusion plate (2), a shear plate (3) and shear nails (4), wherein the lower part of the steel arch rib wallboard (1) is welded on the top surface of the pressure-bearing diffusion plate (2), the pressure-bearing diffusion plate (2) is positioned on the top end surface of a concrete beam (5), and the shear plate (3) and the shear nails (4) are pre-embedded in the concrete beam (5);

the shear plates (3) and the shear nails (4) are arranged along the bridge direction and the transverse bridge direction at intervals, and the shear plates (3) and the shear nails (4) are welded on the bottom surface of the pressure-bearing diffusion plate (2).

2. The novel structure for the steel arch rib and the concrete bridge deck tie beam of the arch bridge according to claim 1, characterized in that: the shear plate (3) is uniformly provided with pin holes for inserting the shear steel bars (6).

3. The novel structure for the steel arch rib and the concrete bridge deck tie beam of the arch bridge according to claim 1, characterized in that: the steel arch rib wallboard (1) is of a rectangular section or a circular section, and the pressure-bearing diffusion plate (2) is matched with the section of the steel arch rib wallboard (1).