CN218756968U

CN218756968U - Seamless expansion joint structure based on spring rib

Info

Publication number: CN218756968U
Application number: CN202222803098.7U
Authority: CN
Inventors: 黄福云; 应博学; 刘帆; 俞玎立; 肖琼
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-03-28
Anticipated expiration: 2032-10-25

Abstract

The utility model relates to a seamless expansion joint structure based on spring muscle, including the pontic that a pair of end is relative, the pontic comprises girder, the decking of laying at the girder top, the bridge deck pavement of laying at the decking top, the end top of girder is provided with not adhesive layer, is provided with the UHPC board that is used for connecting the concavo-convex of decking between the top on non-adhesive layer, and the plate inslot of UHPC board is the layer of mating formation of packing to the surface course, and the plate inslot reinforcing bar of UHPC board is provided with the spring coupling section. Effectively promote the rigidity of bridge floor department in succession, improved connection structure's whole vertical rigidity and intensity, made its vertical rigidity with the bridge floor match, can show to alleviate diseases such as reserve tank gnawing, elastoplast fracture that lead to because of there being great deformation difference when the wheel rolls the expansion joint. The device can better adapt to the complex space stress state of the bridge deck and meet the normal use requirement of the continuous structure of the bridge deck.

Description

Seamless expansion joint structure based on spring rib

Technical Field

The utility model relates to a seamless expansion joint structure based on spring muscle.

Background

In a conventional slotted bridge, in order to accommodate expansion and contraction deformation of a main beam caused by temperature change, telescopic gaps are usually arranged at two ends, and an expansion joint structure is usually arranged at the telescopic gaps. The expansion joint directly bears the vehicle load, the environment and the like, and is easy to cause diseases and even lose efficacy. When the expansion joint is damaged, the expansion joint is often cracked, damaged and gnawed along with a concrete pavement connected with the expansion joint, and the phenomena of uneven settlement, pavement top expansion and the like occur on the pavement of the expansion joint in succession after a long time, so that the service quality of the bridge is greatly reduced, and the safety and the durability of the bridge structure are influenced.

The problem of bridge expansion joint fragile is solved in the tradition, and the bridge floor connecting plate structure in the bridge floor continuous structure is adopted or seamless elastoplast body expansion joint is set up to prior art more. However, the bridge deck connecting plate cannot adapt to deformation and damage due to the fact that the bridge deck connecting plate is located in a complex stress situation all the year round due to the special position of the bridge deck connecting plate, and the elastic-plastic expansion joint often generates a through crack due to the fact that the elastic-plastic expansion joint cannot provide high vertical bearing capacity, and the service life of the whole bridge is influenced again. Therefore, in order to adapt to the expansion deformation amount, the seamless expansion joint structure which not only adapts to horizontal deformation but also has higher vertical bearing capacity is provided, and reference value is provided for replacing the expansion device of the medium and small bridges and the expansion joint.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a seamless expansion joint structure based on spring muscle.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a seamless expansion joint structure based on spring muscle, includes the pontic that a pair of end is relative, the pontic comprises the girder, lay the decking at girder top, lay the bridge deck pavement at decking top, the end top of girder is provided with not bondingless layer, is provided with the UHPC board that is used for connecting the concavo-convex type of decking between the top on not bondingless layer, and the inboard inslot of UHPC board is the layer of mating formation to the surface course is packed, and the inboard reinforcing bar of UHPC board is provided with the spring coupling section.

Preferably, the UHPC board is a cast-in-situ board, the UHPC board is in a concave-convex shape with a large tooth mouth, a corresponding adaptive deformation area is arranged in the concave, a corresponding bearing area is arranged in the convex, and steel bars are bound among the UHPC board, the bridge deck and the main beam.

Preferably, the steel bar in the deformation area of the UHPC plate is provided with a spring connecting section, the spring connecting section is formed by welding the steel bar with a small diameter which is curled and welded with the steel bars at two ends, a gap in the middle of the spring connecting section is filled with sponge foam, and the spring connecting section is externally wrapped with a pvc pipe layer for isolating aggregate.

Preferably, the filler paving layer is connected with the bridge deck pavement and the upper surface of the filler paving layer is flush with the upper surface of the bridge deck pavement.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the rigidity of the continuous part of the bridge deck is effectively improved, the integral vertical rigidity and the strength of the connecting structure are improved, the connecting structure is matched with the vertical rigidity of the bridge deck, and the defects that the reserved groove gnaws edges, the elastic plastic body cracks and the like caused by large deformation difference when the wheel rolls over the expansion joint can be obviously reduced. The device can better adapt to the complex space stress state of the bridge deck and meet the normal use requirement of the continuous structure of the bridge deck.

(2) And has good deformation performance. The better deformation capacity along the bridge direction is realized by utilizing the better expansion deformation amount of the spring connecting section, so that the expansion deformation of the beam body caused by contraction, creep and temperature change is adapted, the horizontal displacement of the bridge superstructure under the braking force action is effectively resisted by certain rigidity, the deviation of the bridge pier is also reduced, and the stress on the bridge pier is favorable.

(3) And has convenient construction performance. This bridge floor connection structure form is simple, does not have complicated steel bar connection structure, and special reinforcing bar section is formed by the mill prefabrication and realizes batch production, is applicable to the new bridge construction, has cancelled loaded down with trivial details chisel and has removed the flow at installation expansion joint, and installation outfit process is accomplished at one stroke. Effectively prevents disturbance of vehicles from coming and going from damaging the UHPC solidification process, and can carry out construction without completely closing traffic during local reinforcement.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 isbase:Sub>A top view of section A-A of FIG. 1;

fig. 3 is a partial detail construction view of the spring connecting section.

In the figure: 1-a filler paving layer; 2-UHPC board; 3-a bridge deck; 4-no adhesive layer; 5, a main beam; 6-lapping the main girder steel bars and the bridge deck steel bars; 7-lapping the main beam steel bars and the steel bars in the UHPC plate; 8-a spring connection section; 9-common steel bars in the UHPC plate; 10-main beam internal steel bars; a 11-pvc pipe layer; 12-reinforcing steel bars.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 3, the present embodiment provides a seamless expansion joint structure based on a spring bar, including a pair of pontics with opposite ends, where the pontics are composed of a main beam, a deck slab laid on the top of the main beam, and a bridge deck laid on the top of the deck slab, the top of the end of the main beam is provided with an unbonded layer, a concave-convex UHPC board used for connecting the deck slab is arranged between the tops of the unbonded layers, the interior of a slab groove of the UHPC board is a filler pavement layer to the surface layer, and a steel bar in the slab groove of the UHPC board is provided with a spring connection section.

The embodiment of the utility model provides an in, UHPC board is cast-in-place board in situ, UHPC board presents the unsmooth type of great tooth mouth, for corresponding adaptation deformation zone in its concave, for corresponding the load-bearing zone in the protruding, all there is reinforcement between UHPC board and decking, girder, makes it have better connection with decking and girder.

In the embodiment of the utility model, the reinforcing bar is provided with the spring coupling section in the deformation zone of UHPC board, the spring coupling section is curled to form and forms with the steel bar welding at both ends for the reinforcing bar of thinner diameter, there is sponge foam to fill in the spring coupling section middle part space, the isolated pvc pipe layer of gathering materials of the outside parcel of spring coupling section, the spring coupling section all needs to carry out preliminary water repellent.

The embodiment of the utility model provides an in, the layer of mating formation is the polyurethane rubble mixture layer of mating formation, has better elastoplasticity, level to deformability and vertical bearing capacity.

The embodiment of the utility model provides an in, the layer of mating formation of packing links up and the upper surface parallel and level with the bridge deck pavement.

A construction method of a seamless expansion joint structure based on spring ribs comprises the following steps:

(1) Integrally prefabricating steel bars of a spring connecting section required in the UHPC plate in a factory according to the drawing size and the field requirement, and performing anticorrosion and antirust treatment;

(2) Before the main beam is erected, the construction process is normally carried out according to the conventional steps, and after the main beam is placed, gap filling materials such as foam sponge and the like are added;

(3) Laying an unbonded layer which is made of rubber at a corresponding position between the main beams;

(4) Binding longitudinal and transverse steel bars at the corresponding position of the expansion joint while laying the steel bars of the bridge deck, binding the steel bars of the spring connecting section required in the UHPC plate with the steel bars of the bridge deck and the steel bars extending out of the main beam, and then erecting a formwork of the UHPC plate structure;

(5) After casting, pouring the bridge deck concrete and the UHPC plate, and after casting, normally curing by steam until the concrete is basically fixed and formed;

(6) And finally, paving a common asphalt layer paved on the bridge deck and a polyurethane-gravel mixture pavement layer at the expansion joint, compacting the upper surface of the common asphalt layer in a flush manner, and then maintaining for 3-5 hours to open the traffic.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a seamless expansion joint structure based on spring muscle which characterized in that: including the relative pontic of a pair of end, the pontic comprises the girder, lays the decking at girder top, lays the bridge deck pavement at decking top and constitutes its characterized in that by the girder: the end top of girder is provided with the unbonded layer, is provided with the UHPC board that is used for connecting the concave-convex type of decking between the top on unbonded layer, and the inboard groove of UHPC board is the filler layer of mating formation to the surface course, and the inboard inslot reinforcing bar of UHPC board is provided with the spring coupling section.

2. The seamless expansion joint structure based on spring bars according to claim 1, characterized in that: the UHPC board is a cast-in-situ board on site, the UHPC board is in a concave-convex shape with a large tooth mouth, a corresponding adaptive deformation area is arranged in the concave, a corresponding bearing area is arranged in the convex, and steel bars are bound among the UHPC board, the bridge deck and the main beam.

3. The seamless expansion joint structure based on spring bars according to claim 2, characterized in that: the reinforcing steel bar in the deformation zone of the UHPC plate is provided with a spring connecting section, the spring connecting section is formed by welding the reinforcing steel bar with a small diameter which is curled and is welded with the reinforcing steel bars at two ends, a gap in the middle of the spring connecting section is filled with sponge foam, and the outside of the spring connecting section is wrapped with a PVC pipe layer for isolating aggregate.

4. The seamless expansion joint structure based on spring bars according to claim 1, characterized in that: the filler pavement layer is connected with the bridge deck pavement and the upper surface of the filler pavement layer is flush with the upper surface of the bridge deck pavement layer.