CN-224213159-U - Novel and old hollow slab bridge width splicing structure

CN224213159UCN 224213159 UCN224213159 UCN 224213159UCN-224213159-U

Abstract

The utility model provides a splicing structure of new and old hollow slab bridges, which comprises an existing hollow slab beam, a widened hollow slab beam, a wet joint structure and a steel bar assembly, wherein a first groove is formed in the existing hollow slab beam in a sunken mode, a second groove is formed in the widened hollow slab beam in a sunken mode, the wet joint structure comprises an existing section, a splicing section and a widening section which are spliced side by side longitudinally, the existing section is connected in the first groove, the widening section is connected in the second groove, and the steel bar assembly comprises a transverse steel bar assembly, a longitudinal steel bar assembly and a longitudinal connecting assembly. The wet joint structure is distributed in three sections, the contact area is improved, the whole cast-in-situ structure is adopted, the longitudinal reinforcement assemblies and the longitudinal connection assemblies penetrate through the embedded structure to improve the splice width connection integrity, the wet joint structure has excellent overall performance, the common stress of new and old structures can be ensured, the sedimentation difference is avoided, the problem that the longitudinal cracks are easy to generate when the spliced expansion joints are paved is effectively solved, rainwater can be prevented from penetrating between the spliced joints to fall under the bridge deck, and the environment under the bridge is improved.

Inventors

LI BIAO
GUO YUBIAO
ZHANG LI
CAO MINHUI
Liu Wo
ZHAO WEI
PENG YU
ZUO YUN
CHENG YING
CHEN JIANMIN
LI YULIN
ZHANG XIANWEI
ZHANG XIAOLONG
HE JUNPING

Assignees

湖南省交通规划勘察设计院有限公司

Dates

Publication Date: 20260508
Application Date: 20250515

Claims (10)

1. The utility model provides a new and old hollow slab bridge piece wide structure, its characterized in that includes existing hollow slab beam, widens hollow slab beam, wet seam structure and reinforcing bar subassembly, between existing hollow slab beam and the widening hollow slab beam along the vertical bridge interval setting, existing hollow slab beam is close to widening hollow slab beam's one end sunken formation has first recess, widening hollow slab beam is close to existing hollow slab beam's one end sunken formation has the second recess, wherein, The wet joint structure comprises an existing section, a splicing section and a widening section which are spliced side by side along the longitudinal direction, wherein the splicing section is connected between the existing hollow plate beam and the widening hollow plate beam, the existing section is connected in the first groove, and the widening section is connected in the second groove; the steel bar assembly comprises a transverse steel bar assembly, a longitudinal steel bar assembly and a longitudinal connecting assembly, wherein the transverse steel bar assembly is pre-buried in the existing section, the splicing section and the widening section, the longitudinal steel bar assembly sequentially penetrates through the existing section, the splicing section and the widening section, and the longitudinal connecting assembly is arranged in the splicing section and two ends of the longitudinal connecting assembly respectively extend into the existing hollow slab beam and the widening hollow slab beam.
2. The new and old hollow slab bridge widening structure according to claim 1, wherein the number of the transverse reinforcement assemblies in the splicing section is two, and the two transverse reinforcement assemblies are vertically arranged at intervals so as to be respectively distributed at the top and the bottom of the splicing section.
3. The new and old hollow slab bridge splicing structure according to claim 2, wherein the longitudinal connecting assembly comprises a first bar planting assembly, a second bar planting assembly and a connecting piece, two ends of the first bar planting assembly are respectively embedded in the existing hollow slab beam and the splicing section, two ends of the second bar planting assembly are respectively embedded in the widened hollow slab beam and the splicing section, and the first bar planting assembly and the second bar planting assembly are connected through the connecting piece.
4. A new and old hollow slab bridge widening construction according to claim 3, wherein the longitudinal connecting members are disposed adjacent to the lower transverse reinforcing members.
5. The new and old hollow slab bridge widening structure according to claim 3, wherein the end parts of the second bar planting assemblies extending into the widened hollow slab beams are arranged in a bent shape.
6. The old and new hollow slab bridge widening construction according to claim 1, wherein the top of the wet joint structure is flush with the top of the existing hollow slab beam and the widened hollow slab beam.
7. The old and new hollow slab bridge widening configuration according to claim 1, wherein the existing section has a longitudinal length greater than that of the widening section.
8. A new and old hollow slab bridge widening construction according to claim 3, wherein the connecting members comprise a plurality of connecting short bars arranged at intervals in the longitudinal direction, and the connecting short bars are connected between the first bar planting assembly and the second bar planting assembly.
9. The new and old hollow slab bridge widening construction according to claim 2, wherein the reinforcement bar assembly further comprises a stirrup assembly which is hooped and connected to the outer sides of the two-layer transverse reinforcement bar assembly of the splicing section.
10. The new and old hollow slab bridge widening construction according to claim 1, further comprising a deck pavement section laid on top of the existing hollow slab beam, the wet joint structure, and the widened hollow slab beam.

Description

Novel and old hollow slab bridge width splicing structure Technical Field The utility model relates to the technical field of hollow slab transformation, in particular to a new and old hollow slab bridge width splicing structure. Background Due to the rapid growth of vehicles, rapid growth of vehicles is not predicted in early design, the service level of the expressway does not meet the driving requirements at present, and reconstruction and expansion engineering is urgently needed. The experts at home and abroad conduct a great deal of researches on a great deal of cracks generated at the splicing joints and stress conditions of the old and new bridges and joint cracking deformation when the old and new splicing bridges are operated at the later stage, and meanwhile, conduct a great deal of intensive researches on the cracking mechanism of concrete at the joints and the interaction mechanism between the old and new beam body concrete, and obtain certain results. When the new and old hollow plate beams are spliced and connected, the rigidity of the new and old beam plates is different, the connection mode is different, the influence on the overall performance and the stress characteristics of the bridge structure is large, and the splicing part between the old hollow plate beams and the spliced and wide hollow plate beams in the spliced and wide structure in the prior art is poor in integrity, so that the problem of inconsistent settlement can occur, cracking is easy to occur, and the bridge deck flatness is influenced. In view of the above, it is necessary to provide a new and old hollow slab bridge widening structure to solve or at least alleviate the above-mentioned drawbacks. Disclosure of utility model The utility model mainly aims to provide a splicing structure of new and old hollow slab bridges, which aims to solve the problems that the splicing structure in the prior art is poor in integrity and inconsistent in settlement. In order to achieve the above object, the utility model provides a new and old hollow slab bridge widening structure, comprising an existing hollow slab beam, a widened hollow slab beam, a wet joint structure and a steel bar assembly, wherein the existing hollow slab beam and the widened hollow slab beam are arranged at intervals along a longitudinal bridge direction, a first groove is concavely formed at one end of the existing hollow slab beam, which is close to the widened hollow slab beam, and a second groove is concavely formed at one end of the widened hollow slab beam, which is close to the existing hollow slab beam, The wet joint structure comprises an existing section, a splicing section and a widening section which are spliced side by side along the longitudinal direction, wherein the splicing section is connected between the existing hollow plate beam and the widening hollow plate beam, the existing section is connected in the first groove, and the widening section is connected in the second groove; the steel bar assembly comprises a transverse steel bar assembly, a longitudinal steel bar assembly and a longitudinal connecting assembly, wherein the transverse steel bar assembly is pre-buried in the existing section, the splicing section and the widening section, the longitudinal steel bar assembly sequentially penetrates through the existing section, the splicing section and the widening section, and the longitudinal connecting assembly is arranged in the splicing section and two ends of the longitudinal connecting assembly respectively extend into the existing hollow slab beam and the widening hollow slab beam. Preferably, the number of the transverse reinforcement assemblies in the splicing section is two, and the two transverse reinforcement assemblies are distributed at vertical intervals so as to be respectively distributed at the top and the bottom of the splicing section. Preferably, the longitudinal connecting assembly comprises a first bar planting assembly, a second bar planting assembly and a connecting piece, two ends of the first bar planting assembly are respectively embedded in the existing hollow slab beam and the splicing section, two ends of the second bar planting assembly are respectively embedded in the widened hollow slab beam and the splicing section, and the first bar planting assembly is connected with the second bar planting assembly through the connecting piece. Preferably, the longitudinal tie assembly is disposed adjacent the underlying transverse rebar assembly. Preferably, the end part of the second bar planting assembly extending into the widened hollow plate beam is arranged in a bending shape. Preferably, the top of the wet joint structure is arranged flush with the top of the existing hollow plate girder and the widened hollow plate girder. Preferably, the longitudinal length of the existing segment is greater than the longitudinal length of the widened segment. Preferably, the connecting piece comprises a plurality of connecting sho