CN-224213105-U - Annular PBL shear key stiffening type steel pipe concrete arch

CN224213105UCN 224213105 UCN224213105 UCN 224213105UCN-224213105-U

Abstract

The utility model relates to the technical field of concrete arch bridges, in particular to an annular PBL shear key stiffening type steel pipe concrete arch which comprises a bridge deck and a main arch formed by continuously splicing a plurality of steel pipe concrete arch segments, wherein the steel pipe concrete arch segments comprise common steel pipe concrete arch segments and stiffening type steel pipe concrete arch segments internally provided with annular PBL shear keys according to the stress condition of the positions of the steel pipe concrete arch segments in the main arch; and a plurality of vertical connecting rods are arranged between the main arch and the bridge deck structure for fastening connection, and the vertical connecting rods are connected with the reinforced steel tube concrete arch segments. The annular PBL shear keys are flexibly distributed and directly welded on the inner wall of the bearing steel pipe. The annular PBL shear key can be used as a connecting piece for shear force transmission between the bearing steel pipe and the filled concrete structure when stiffening the steel pipe arch, so that the stress system of the whole main arch is more perfect.

Inventors

GUO HUAJUN
LIU YONGJIAN
MA WENJIE
LIU JIANG
HE ZHIHUI

Assignees

青海省交通建设管理有限公司
长安大学

Dates

Publication Date: 20260508
Application Date: 20250527

Claims (10)

1. The annular PBL shear key stiffening type steel pipe concrete arch is characterized by comprising a bridge deck (2) and a main arch (1) formed by continuously splicing a plurality of steel pipe concrete arch sections, wherein the steel pipe concrete arch sections comprise common steel pipe concrete arch sections (4-1) and stiffening type steel pipe concrete arch sections (4-2) internally provided with annular PBL shear keys (6) according to the stress condition of the steel pipe concrete arch sections in the main arch (1), a plurality of vertical connecting rods are arranged between the main arch (1) and the bridge deck (2) for fastening connection, and the vertical connecting rods are connected with the stiffening type steel pipe concrete arch sections (4-2).
2. The annular PBL shear tie stiffened steel tube concrete arch of claim 1, wherein the plain steel tube concrete arch segment (4-1) is comprised of an arch steel tube one (5-1) and an internally poured filled concrete structure.
3. The annular PBL shear key stiffening type steel pipe concrete arch according to claim 1, wherein the annular PBL shear key stiffening type steel pipe concrete arch section (4-2) consists of an arch steel pipe II (5-2), an annular PBL shear key (6) and a filling concrete structure poured into the arch steel pipe II (5-2), and the annular PBL shear key (6) is welded on the inner side wall of the arch steel pipe II (5-2) along the axial direction.
4. The annular PBL shear key stiffening steel pipe concrete arch according to claim 3, wherein the annular PBL shear key (6) is a stiffening rib round steel plate, and a plurality of through holes (9) are formed in the stiffening rib round steel plate.
5. The annular PBL shear key stiffening steel pipe concrete arch according to claim 4, wherein the stiffening rib round steel plates are welded on the stress area of the stiffening steel pipe concrete arch section (4-2) along the inner wall of the stiffening steel pipe concrete arch section (4-2) at a certain distance from the end parts of the stiffening steel pipe concrete arch section (4-2), and stiffening rib round steel plates are uniformly distributed at the two ends of the stiffening steel pipe concrete arch section (4-2).
6. The annular PBL shear tie stiffened steel tube concrete arch according to claim 4, wherein a plurality of said through holes (9) are uniformly distributed on the stiffener circular plate.
7. The annular PBL shear key stiffening steel pipe concrete arch according to claim 4, wherein the through holes (9) on the stiffening rib circular steel plate are symmetrically distributed left and right by taking the longitudinal center line of the arch steel pipe II (5-2) as a symmetry axis.
8. The annular PBL shear key stiffening steel pipe concrete arch according to claim 4, wherein the spacing and the number between two adjacent through holes (9) on the stiffening rib circular steel plate are set according to the actual stress condition of the stiffening steel pipe concrete arch segment (4-2) at the position where the stiffening rib circular steel plate is arranged.
9. The annular PBL shear tie stiffened steel tube concrete arch of claim 4, wherein the spacing between adjacent two of said stiffening rib circular steel plates is adjusted accordingly based on the actual loading of the stiffened steel tube concrete arch segment (4-2) at the location where it is deployed.
10. The annular PBL shear key stiffening steel pipe concrete arch according to claim 4, wherein when two adjacent stiffening steel pipe concrete arch segments (4-2) are connected, the stiffening rib round steel plates arranged at the connection position are connected together, and one or more construction holes for fastening and connecting the stiffening rib round steel plates arranged in the two adjacent stiffening steel pipe concrete arch segments (4-2) into a whole are arranged on the two arch steel pipes (5-2).

Description

Annular PBL shear key stiffening type steel pipe concrete arch Technical Field The utility model relates to the technical field of concrete arch bridges, in particular to an annular PBL shear key stiffening steel tube concrete arch. Background The CN102094386A discloses a reinforced steel pipe concrete arch with a PBL shear key, which comprises a main arch formed by continuously splicing a plurality of steel pipe concrete arch segments, wherein the steel pipe concrete arch segments are divided into two types of reinforced steel pipe concrete arch segments internally provided with the PBL shear key or common steel pipe concrete arch segments internally not provided with the PBL shear key according to the stress condition of the positions of the reinforced steel pipe concrete arch segments in the main arch, the common steel pipe concrete arch segments comprise an arch steel pipe II and a concrete filling structure II filled in the arch steel pipe II, the reinforced steel pipe concrete arch segments comprise an arch steel pipe I, a plurality of PBL shear keys distributed on the inner side wall of the arch steel pipe I along the axial direction and a concrete filling structure I filled in the arch steel pipe I, and the cross section structure and the cross section size of the arch steel pipe II are identical with those of the arch steel pipe I. However, due to limited bonding force between the steel tube and the concrete, slippage between the steel tube and the concrete is easily generated at the joint of the main arch of the steel tube concrete arch and the arch rib, and the bearing capacity of the arch rib is seriously reduced, so that the durability and the usability of the steel tube concrete arch bridge are affected. Therefore, how to solve the problem of the void between the steel tube and the concrete at the joint of the steel tube concrete arch bridge and to enhance the collaborative work capacity of the steel tube concrete is a technical problem to be solved urgently at present. Disclosure of utility model Aiming at the problem of void between the steel tube and the concrete at the joint of the steel tube concrete arch bridge in the prior art, the utility model provides the annular PBL shear key stiffening steel tube concrete arch. The utility model is realized by the following technical scheme: The annular PBL shear key stiffening type steel pipe concrete arch comprises a bridge deck and a main arch formed by continuously splicing a plurality of steel pipe concrete arch segments, wherein the steel pipe concrete arch segments comprise common steel pipe concrete arch segments and stiffening type steel pipe concrete arch segments internally provided with annular PBL shear keys according to the stress condition of the steel pipe concrete arch segments in the main arch, a plurality of vertical connecting rods are arranged between the main arch and a bridge deck structure for fastening connection, and the vertical connecting rods are connected with the stiffening type steel pipe concrete arch segments. Preferably, the common type steel pipe concrete arch segment consists of an arch steel pipe I and a filling concrete structure filled in the arch steel pipe I. Preferably, the annular PBL shear key stiffening type steel pipe concrete arch section consists of an arch steel pipe II, an annular PBL shear key and a filling concrete structure poured into the arch steel pipe II, and the annular PBL shear key is welded on the inner side wall of the arch steel pipe II along the axial direction. Preferably, the annular PBL shear key is a stiffening rib round steel plate, and a plurality of through holes are formed in the stiffening rib round steel plate. Preferably, the stiffening rib round steel plates are welded on the stress area of the stiffening type steel pipe concrete arch segment along the inner wall of the stiffening type steel pipe concrete arch segment at intervals from the end parts of the stiffening type steel pipe concrete arch segment, and the stiffening rib round steel plates are uniformly distributed at the two ends of the stiffening type steel pipe concrete arch segment. Preferably, the plurality of through holes are uniformly distributed on the stiffening rib round steel plate. Preferably, the through holes in the stiffening rib circular steel plates are symmetrically distributed by taking the longitudinal center line of the arch steel pipe II as a symmetry axis. Preferably, the spacing and the number between two adjacent through holes on the stiffening rib circular steel plate are set according to the actual stress condition of the stiffening steel pipe concrete arch section at the position where the stiffening rib circular steel plate is arranged. Preferably, the distance between two adjacent stiffening rib circular steel plates is correspondingly adjusted according to the actual stress condition of the stiffening steel pipe concrete arch segment at the position where the stiffening rib circular s