CN103603264B - The beam end joint structure of large-span structure railroad bridge bridge floor system conveyance system - Google Patents

Abstract

The invention relates to a beam end joint structure of a bridge deck system supporting project of a long-span railway bridge. In the supporting engineering of the bridge deck of long-span structural bridge engineering, the large value of the beam gap affects the integrity of the beam body; if the beam gap is reduced, the longitudinal elongation and deformation of the beam body will cause the shutters at both ends of the adjacent beam body and the vertical wall to be topped. Beam gaps are arranged between the beam bodies of the present invention, and shutters, side vertical walls, middle vertical walls and protective walls are arranged on the beam bodies; the shutters and side vertical walls are integrated; side vertical walls and middle vertical walls, middle vertical walls and protective walls There is a cable trough in between, and a cover plate is set on the top, and a beam end cover plate is set between the cover plates. The cover plate seam between the beam end cover plates is the same width as the side wall joint but smaller than the width of the beam joint; a steel cover plate is set above the cover plate seam , the steel cover plate and the beam end cover plate on one side are fixed by anchor bolts. The invention avoids the adverse effect on the force of the beam body caused by the too small gaps of the beam end shutter, the vertical wall and the cover plate, and ensures the requirements of the elongation and deformation of the beam body under unfavorable working conditions.

Description

Beam end joint structure of supporting engineering of bridge deck system of long-span railway bridge

technical field

The invention belongs to the technical field of bridge structure construction, and in particular relates to a beam end joint structure of a bridge deck system supporting project of a long-span railway bridge.

Background technique

The bridge deck system supporting project of railway bridge engineering consists of protective walls, shutters, cable ducts (including central vertical walls and side vertical walls, cover plates), railings (including columns, spacers and handrails) or sound barriers, catenary pillar foundations, Expansion joints, bridge deck waterproof layer and protective layer, weep holes, etc. Generally, the shroud, the vertical wall, and the cover plate have the same length, and the shroud is a prefabricated component, which is connected with the vertical wall beside the beam body as a whole at the bridge position. When the beam end beam joints are small (for example, 24m and 32m simply supported beams have a linear beam joint of 10cm), the prefabricated length of the shroud, vertical wall and cover plate can be adjusted appropriately under the condition of satisfying the longitudinal horizontal deformation of the beam body, so that the beam end The gap is controlled at 4cm. However, for long-span continuous beams connected to simply supported beams, continuous beams connected to continuous beams, and other long-span structures, the beam gap value reaches 20 to 30 cm. Under the most unfavorable working conditions, due to the longitudinal elongation and deformation of the beam body, the shutters at both ends of the adjacent beam body and the vertical wall are blocked, thereby adversely affecting the force on the beam body; Longitudinal elongation and deformation requirements require a gap of 10 to 15 cm between the shutters, vertical walls, and cover plates. If the gap is too large, it will affect the aesthetics of the structure, and the sidewalk cover plate at the end needs to be hung out, which has the problem of overturning the cover plate.

Contents of the invention

The object of the present invention is to provide a beam end joint structure of the supporting engineering of the bridge deck of a long-span railway bridge, which solves the problem of gap treatment of the beam end shutters, vertical walls and cover plates of the supporting engineering of the bridge deck.

The technical scheme adopted in the present invention is:

The bridge deck of a long-span railway bridge is a girder end joint structure of supporting engineering, including two adjacent girder bodies, and a longitudinal beam joint is arranged between the girder ends of the two girder bodies. It is characterized in that:

Starting from the horizontal edge above each girder body, shrouds parallel to the longitudinal bridge direction and perpendicular to the girder body, side vertical walls, middle vertical walls and protective walls are arranged in sequence; the shrouds and side vertical walls are connected as a whole; There are cable channels between the wall and the vertical wall, between the vertical wall and the protective wall;

The height of the screen and the side vertical wall is equal, and the height of the middle vertical wall is lower than that of the shutter, the side vertical wall and the protective wall; the sides of the side vertical wall and the protective wall close to the middle vertical wall are provided with shoulders of the same height as the middle vertical wall, A cover plate is set up on the shoulder;

There are side wall joints with the same width in the longitudinal bridge direction between the side vertical walls and the middle vertical walls above the two beams, and the width of the side wall joints is smaller than the width of the beam joints;

The longitudinal bridge length of the cover plate is less than that of the side vertical wall and the middle vertical wall, and the beam end cover plate is arranged above the longitudinal bridge end of the side vertical wall and the middle vertical wall between adjacent cover plates, and the adjacent beam end cover plate The width of the cover plate seam in the longitudinal bridge direction is the same as that of the side wall seam, and a steel cover plate is arranged above the cover plate seam, and the steel cover plate and the beam end cover plate on one side are fixed by anchor bolts.

The longitudinal width of the beam joint is 20-30cm;

The longitudinal bridge width of the cover plate seam and the longitudinal bridge width of the side wall seam are both 10-15 cm.

Elastic polymer filling pads are arranged between the shrouds above the two adjacent beam bodies.

A water intercepting groove is arranged above the whole formed by the shutter and the side vertical wall.

The present invention has the following advantages:

The joint structure involved in the present invention avoids the adverse effect on the beam body force caused by too small gaps between beam end shutters, vertical walls, and cover plates; Large, which affects the beauty of the beam body; and guarantees the elongation and deformation requirements of the beam body under some of the most unfavorable working conditions.

Description of drawings

Figure 1 is a schematic diagram of the horizontal arrangement of beam end shutters, vertical walls and cover plates.

Figure 2 is a schematic diagram of the gap treatment of the vertical wall and cover plate at the end of the beam.

Fig. 3 is a schematic diagram of a fixed plane of a steel cover plate at a beam end.

Figure 4 is a schematic diagram of the gap treatment of the beam end shield.

In the figure, 1-beam body, 2-side vertical wall, 3-cover plate, 4-beam end cover plate, 5-steel cover plate, 6-anchor bolt, 7-shroud, 8-elastic polymer filling pad, 9-cutting trench, 10-protective wall, 11-middle vertical wall.

detailed description

The present invention will be described in detail below in combination with specific embodiments.

The girder end joint structure of a long-span railway bridge deck system supporting project related to the present invention includes two adjacent girder bodies 1, and a longitudinal bridge direction is arranged between the girder ends of the two girder bodies 1. Beam seam. Referring to Fig. 1 , starting from the transverse edge above each beam body 1, there are sequentially provided with a shroud 7 parallel to the longitudinal bridge direction and perpendicular to the beam body 1, a side vertical wall 2, a middle vertical wall 11 and a protective wall 10; the shroud 7 is connected as a whole with the side vertical wall 2; Between the side vertical wall 2 and the middle vertical wall 11, the middle vertical wall 11 and the protective wall 10 are all cable grooves. The shutter 7, the side vertical wall 2 and the protective wall 10 are of the same height, the middle vertical wall 11 is lower than the shutter 7, the side vertical wall 2 and the protective wall 10; the side vertical wall 2 and the protective wall 10 are close to the side of the middle vertical wall 11 All are provided with shoulders of the same height as the middle vertical wall 11, and cover plates 3 are set up on the shoulders.

Referring to Fig. 2, side wall joints with the same width in the longitudinal bridge direction and the same width are arranged between the side vertical walls 2 above the two beam bodies 1 and between the middle vertical walls 11, and the width of the side wall joints is smaller than the width of the beam joints. The longitudinal bridge length of the cover plate 3 is smaller than the side vertical wall 2 and the middle vertical wall 11, and a beam end cover plate 4 is arranged above the longitudinal bridge end of the side vertical wall 2 and the middle vertical wall 11 between adjacent cover plates 3 , the width of the cover plate seam in the longitudinal bridge direction between adjacent beam end cover plates 4 is the same as the width of the side wall seam. Referring to Fig. 3, a steel cover plate 5 is arranged above the cover plate seam, which can effectively solve the problem that the width of the cover plate seam between the beam end cover plates 4 is too large or the beam end cover plate 4 hangs out and may be overturned; The body 1 stretches and deforms, and the steel cover plate 5 and the beam end cover plate 4 on one side are fixed by anchor bolts 6 . Among them, the longitudinal bridge width of beam joints is 20-30 cm, the longitudinal bridge width of cover plate joints and the longitudinal bridge width of side wall joints are both 10-15 cm.

Referring to Fig. 4, an elastic polymer filling pad 8 is arranged between the shutters 7 above the two adjacent beam bodies 1, which ensures the continuity of the shutter 7 and meets the aesthetic requirements. On the other hand, the elastic polymer filling pad 8 It has a high ability to adapt to the deformation of the beam body and good durability.

In FIG. 1 , a water intercepting groove 9 is also arranged above the whole formed by the shutter 7 and the side vertical wall 2 .

The content of the present invention is not limited to the examples listed, and any equivalent transformation of the technical solution of the present invention adopted by those of ordinary skill in the art by reading the description of the present invention is covered by the claims of the present invention.

Claims (4)

1. The bridge deck of a long-span railway bridge is the girder end joint structure of the supporting project, including two adjacent girder bodies (1), and a longitudinal beam is arranged between the girder ends of the two girder bodies (1). seam Starting from the horizontal edge above each girder body (1), shutters (7), side vertical walls (2), middle vertical walls (11) and Protective wall (10); shutter (7) and side vertical wall (2) are connected as a whole; between side vertical wall (2) and middle vertical wall (11), between middle vertical wall (11) and protective wall (10) Both are cable ducts; Shroud (7) and side vertical wall (2) are of equal height, middle vertical wall (11) height is lower than shroud (7), side vertical wall (2) and protection wall (10); Side vertical wall (2) and The sides of the protective wall (10) close to the middle vertical wall (11) are provided with shoulders of the same height as the middle vertical wall (11), and a cover plate (3) is set up on the shoulder; It is characterized by: Between the side vertical walls (2) above the two beams (1) and between the middle vertical walls (11), there are side wall joints in the longitudinal bridge direction and the same width, and the width of the side wall joints is smaller than that of the beam joints. width; The longitudinal length of the cover plate (3) is shorter than that of the side vertical wall (2) and the middle vertical wall (11), and the longitudinal length of the side vertical wall (2) and the middle vertical wall (11) between adjacent cover plates (3) A beam end cover plate (4) is arranged above the end of the bridge, and the width of the cover plate joint in the longitudinal bridge direction between adjacent beam end cover plates (4) is the same as the width of the side wall joint. The cover plate (5), the steel cover plate (5) and the beam end cover plate (4) on one side are fixed by anchor bolts (6). 2. the beam end seam structure of the bridge deck of long-span structure railway bridge system supporting project according to claim 1, is characterized in that: The longitudinal width of the beam joint is 20-30cm; The longitudinal bridge width of the cover plate seam and the longitudinal bridge width of the side wall seam are both 10-15 cm. 3. the beam end joint structure of the bridge deck of long-span structure railway bridge system supporting project according to claim 2, is characterized in that: An elastic polymer filling pad (8) is arranged between the shutters (7) above the two adjacent beam bodies (1). 4. the beam end seam structure of the bridge deck of long-span structure railway bridge system supporting project according to claim 3, is characterized in that: A water intercepting groove (9) is arranged above the whole formed by the shutter (7) and the side vertical wall (2).