阅读说明：本技术 预制uhpc板-波型钢叠合式桥面连接结构及施工方法 (Prefabricated UHPC plate-corrugated steel superposed bridge deck connecting structure and construction method ) 是由 黄福云 刘帆 桂奎 应博学 刘征峰 于 2021-09-14 设计创作，主要内容包括：一种预制UHPC板-波型钢叠合式桥面连接结构,包括一对端头相对的桥体,所述桥体由主梁、铺设于主梁顶部的桥面板、铺设于桥面板顶部的桥面铺装构成,所述主梁的端头顶部均设置有固定钢板,两固定钢板之间设置有跨缝钢板,两固定钢板的顶部之间设置有用于连接桥面板的超高性能混凝土板,两桥面板的顶部之间铺设有用于桥面铺装的SMA-13沥青玛蹄脂层,所述SMA-13沥青玛蹄脂层与桥面铺装上表面平齐。该桥面连接结构不仅具有良好的变形性能与便利的施工性能,还能有效提升桥面连续处的刚度,提高连接结构的整体竖向刚度和强度,使其与桥面的竖向刚度匹配,可以显著减轻车轮碾过伸缩缝时因存在较大的变形差而导致的预留槽啃边、弹塑体开裂等病害。(The prefabricated UHPC plate-corrugated steel superposed bridge deck connecting structure comprises a pair of bridge bodies with opposite ends, wherein each bridge body is composed of a main beam, a bridge deck plate paved on the top of the main beam and a bridge deck pavement paved on the top of the bridge deck plate, fixed steel plates are arranged on the tops of the ends of the main beam, a seam crossing steel plate is arranged between the two fixed steel plates, an ultrahigh-performance concrete plate used for connecting the bridge deck plate is arranged between the tops of the two fixed steel plates, an SMA-13 asphalt mastic layer paved on the bridge deck is arranged between the tops of the two bridge deck plates, and the SMA-13 asphalt mastic layer is flush with the upper surface of the bridge deck pavement. This bridge floor connection structure not only has good deformability and convenient constructability, can also effectively promote the rigidity of the continuous department of bridge floor, improves connection structure's whole vertical rigidity and intensity, makes its vertical rigidity match with the bridge floor, can show to alleviate diseases such as reserved groove gnawing limit, elastoplast fracture that lead to because of there is great deformation difference when the wheel grinds the expansion joint.)

1. The prefabricated UHPC plate-corrugated steel superposed bridge floor connecting structure is characterized in that the top of the end of the main beam is provided with a fixed steel plate, a seam crossing steel plate is arranged between the two fixed steel plates, an ultrahigh-performance concrete plate used for connecting the bridge floor is arranged between the tops of the two fixed steel plates, and an SMA-13 asphalt mastic layer used for paving the bridge floor is laid between the tops of the two bridge floor plates.

2. The prefabricated UHPC plate-corrugated steel laminated bridge deck connecting structure is characterized in that one side of the fixed steel plate, which is far away from the seam crossing steel plate, is provided with square teeth, the square teeth are fixedly connected with a main beam through early-strength concrete, one side of the fixed steel plate, which is near to the seam crossing steel plate, is provided with first corrugated teeth, and two sides of the seam crossing steel plate are provided with second corrugated teeth matched with the first corrugated teeth.

3. The prefabricated UHPC plate-corrugated steel laminated bridge floor connecting structure is characterized in that a movable gap is arranged between the seam-crossing steel plate and the fixed steel plate, a waterproof layer is arranged below the movable gap, and the waterproof layer is made of rubber pads or epoxy resin mortar.

4. The prefabricated UHPC plate-corrugated steel laminated bridge deck connecting structure is characterized in that a plurality of first holes are formed in the fixed steel plate, first vertical steel bars are inserted into the first holes, and exposed steel bars for welding with the first vertical steel bars are reserved on the main beam.

5. The prefabricated UHPC plate-corrugated steel laminated bridge floor connecting structure is characterized in that the ultra-high performance concrete slab is a prefabricated slab, an upper steel bar layer and a lower steel bar layer are arranged in the ultra-high performance concrete slab, the upper steel bar layer is formed by through type steel bars, the lower steel bar layer is formed by staggered type steel bars, reserved steel bars are arranged at two ends of the ultra-high performance concrete slab and fixedly connected with the upper steel bar layer or the lower steel bar layer, and the ultra-high performance concrete slab is fixedly connected with a bridge deck through early strength type concrete.

6. The prefabricated UHPC plate-corrugated steel laminated bridge deck connecting structure is characterized in that a plurality of second holes are formed in the ultrahigh-performance concrete plate, the second holes are located above the seam-crossing steel plates, second vertical steel bars are inserted into the second holes and welded with the seam-crossing steel plates, and ultrahigh-performance concrete or early-strength concrete is filled in the second holes.

7. A prefabricated UHPC plate-corrugated steel composite deck connection structure according to claim 5 wherein the bottom of said ultra high performance concrete slab is sawn.

8. A prefabricated UHPC plate-corrugated steel laminated deck connection structure according to claim 1, wherein said SMA-13 mastic asphalt is flush with the upper surface of the deck pavement.

9. A method of constructing a prefabricated UHPC plate-corrugated steel laminated deck connection structure according to any one of claims 1 to 8, comprising the steps of:

(1) prefabricating a UHPC plate, a fixed steel plate and a seam crossing steel plate according to the size and the requirement in a factory, and performing anticorrosion and antirust treatment;

(2) chiseling the bridge deck pavement, the bridge deck and the upper surface of the main beam part until the requirement of the installation depth is met and the reinforcing steel bars of the main beam part and the bridge deck are exposed;

(3) performing waterproof and anti-seepage treatment on the main beam, arranging a waterproof layer at a preset position, and performing leveling treatment to flatten the surface of the waterproof layer;

(4) mounting a fixed steel plate and a seam crossing steel plate at a preset position, and fixedly connecting square teeth on the fixed steel plate with a main beam through early-strength concrete; inserting a first vertical steel bar into a first hole in the fixed steel plate, welding the first vertical steel bar with the exposed steel bar of the main beam, and pouring early-strength concrete or ultra-high performance concrete into the first hole;

(5) laying a prefabricated UHPC plate between the tops of the two fixed steel plates, welding reserved steel bars with exposed steel bars of the bridge deck plate, inserting second vertical steel bars into second holes in the ultra-high performance concrete plate, welding the second vertical steel bars with the seam-crossing steel plates, and pouring early strength concrete or ultra-high performance concrete into the second holes;

(6) after the cast-in-place concrete reaches a certain strength, leveling the upper surface of the UHPC connecting plate; and (3) paving the SMA-13 asphalt mastic layer on the UHPC board, leveling, maintaining for 3-5 hours and opening traffic.

Technical Field

The invention relates to a prefabricated UHPC plate-corrugated steel superposed bridge deck connecting structure and a construction method thereof.

Background

In the traditional gap bridge, a bridge expansion joint is a weak position in the design of a bridge structure, and becomes one of the difficult problems of bridge construction and maintenance. The expansion joint directly bears the effects of vehicle load, 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 fragile problem of bridge expansion joint is solved in the tradition, mainly realizes through improving the expansion joint structure or canceling the expansion joint. However, the improvement of the expansion joint structure can only reduce the replacement period and the damage degree of the expansion joint, and the problems of maintenance and replacement of the expansion joint cannot be fundamentally solved. Therefore, the elimination of the bridge piers, particularly the expansion joint structures at the bridge abutments, and the seamless and continuous reconstruction of the whole, semi-whole or extended bridge deck of the structure are important measures for improving the service function of the existing bridge, improving the durability and reducing the maintenance.

Disclosure of Invention

The invention aims to provide a prefabricated UHPC plate-corrugated steel superposed bridge deck connecting structure which can realize seamless bridge deck, is short in construction and maintenance time and has small influence on traffic.

The technical scheme of the invention is as follows: the prefabricated UHPC plate-corrugated steel superposed bridge deck connecting structure comprises a pair of bridge bodies with opposite ends, wherein each bridge body is composed of a main beam, a bridge deck plate paved on the top of the main beam and a bridge deck pavement paved on the top of the bridge deck plate, fixed steel plates are arranged on the tops of the ends of the main beam, a seam crossing steel plate is arranged between the two fixed steel plates, an ultrahigh-performance concrete plate used for connecting the bridge deck plate is arranged between the tops of the two fixed steel plates, an SMA-13 asphalt mastic layer paved on the bridge deck is arranged between the tops of the two bridge deck plates, and the SMA-13 asphalt mastic layer is flush with the upper surface of the bridge deck pavement.

Further, one side that fixed steel sheet kept away from striding the seam steel sheet all is provided with square tooth, square tooth is through early strong type concrete and girder fixed connection, one side that fixed steel sheet is close to striding the seam steel sheet all is provided with first ripple tooth, the both sides of striding the seam steel sheet are provided with the second ripple tooth with first ripple tooth matched with.

Furthermore, a movable gap is arranged between the seam crossing steel plate and the fixed steel plate, a waterproof layer is arranged below the movable gap, and the waterproof layer is made of rubber pads or epoxy resin mortar.

Further, be provided with a plurality of first holes on the fixed steel sheet, first hole interpolation is equipped with first vertical reinforcing bar, it has the exposed reinforcing bar that is used for with first vertical steel bar welded to reserve on the girder.

Further, the ultra-high performance concrete slab is a precast slab, an upper reinforcing steel bar layer and a lower reinforcing steel bar layer are arranged in the ultra-high performance concrete slab, the upper reinforcing steel bar layer is formed by through reinforcing steel bars, the lower reinforcing steel bar layer is formed by staggered reinforcing steel bars, reserved reinforcing steel bars are arranged at two ends of the ultra-high performance concrete slab, the reserved reinforcing steel bars are fixedly connected with the upper reinforcing steel bar layer or the lower reinforcing steel bar layer, and the ultra-high performance concrete slab is fixedly connected with the bridge deck through early strength concrete.

Furthermore, a plurality of second holes are formed in the ultrahigh-performance concrete slab, the second holes are located above the seam-crossing steel plates, second vertical steel bars are inserted into the second holes and welded with the seam-crossing steel plates, and ultrahigh-performance concrete or early-strength concrete is filled in the second holes.

Further, the bottom of the ultra-high performance concrete slab is subjected to kerf processing.

A construction method based on a prefabricated UHPC plate-corrugated steel superposed bridge deck connecting structure comprises the following steps:

(1) prefabricating a UHPC plate, a fixed steel plate and a seam crossing steel plate according to the size and the requirement in a factory, and performing anticorrosion and antirust treatment;

(2) chiseling the bridge deck pavement, the bridge deck and the upper surface of the main beam part until the requirement of the installation depth is met and the reinforcing steel bars of the main beam part and the bridge deck are exposed;

(3) performing waterproof and anti-seepage treatment on the main beam, arranging a waterproof layer at a preset position, and performing leveling treatment to flatten the surface of the waterproof layer;

(4) mounting a fixed steel plate and a seam crossing steel plate at a preset position, and fixedly connecting square teeth on the fixed steel plate with a main beam through early-strength concrete; inserting a first vertical steel bar into a first hole in the fixed steel plate, welding the first vertical steel bar with the exposed steel bar of the main beam, and pouring early-strength concrete or ultra-high performance concrete into the first hole;

(5) laying a prefabricated UHPC plate between the tops of the two fixed steel plates, welding reserved steel bars with exposed steel bars of the bridge deck plate, inserting second vertical steel bars into second holes in the ultra-high performance concrete plate, welding the second vertical steel bars with the seam-crossing steel plates, and pouring early strength concrete or ultra-high performance concrete into the second holes;

(6) after the cast-in-place concrete reaches a certain strength, leveling the upper surface of the UHPC connecting plate; and (3) paving the SMA-13 asphalt mastic layer on the UHPC board, leveling, maintaining for 3-5 hours and opening traffic.

Compared with the prior art, the invention has the following advantages:

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 of reserved groove edge gnawing, elastoplast body cracking and the like caused by large deformation difference when wheels roll 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 has good deformation performance. The bridge has good deformation capability along the bridge direction so as to adapt to the expansion deformation of the beam body caused by contraction, creep and temperature change, has certain rigidity so as to effectively resist the horizontal displacement of the upper structure of the bridge under the action of braking force, can reduce the deviation of the bridge pier, and is favorable for the stress of the bridge pier.

And thirdly, the construction performance is convenient. The bridge deck connecting structure is simple in form, does not have a complex steel bar connecting structure, and the UHPC connecting plate is also prefabricated and formed, so that the quality of a construction site is controlled while the construction speed is ensured to be maintained quickly, and the construction quality is ensured. 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.

Drawings

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

FIG. 2 is a cutaway schematic view of the present invention;

FIG. 3 is a schematic view of a fixed steel plate and a seam-crossing steel plate;

in the figure: 1-main beam, 2-bridge deck, 3-bridge deck spreading, 4-fixed steel plate, 5-seam-spanning steel plate, 6-ultra-high performance concrete plate, 7-SMA-13 asphalt mastic layer, 8-square tooth, 9-first corrugated tooth, 10-second corrugated tooth, 11-early strength concrete, 12-movable gap, 13-waterproof layer, 14-first hole, 15-first vertical steel bar, 16-reserved steel bar, 17-second hole, 18-second vertical steel bar and 19-saw seam.

Detailed Description

In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.

Refer to fig. 1-3.

In a preferred embodiment of the present invention: the prefabricated UHPC plate-corrugated steel superposed bridge deck connecting structure comprises a pair of bridge bodies with opposite ends, wherein each bridge body is composed of a main beam, a bridge deck plate paved on the top of the main beam and a bridge deck pavement paved on the top of the bridge deck plate, fixed steel plates are arranged on the tops of the ends of the main beam, a seam crossing steel plate is arranged between the two fixed steel plates, an ultrahigh-performance concrete plate used for connecting the bridge deck plate is arranged between the tops of the two fixed steel plates, an SMA-13 asphalt mastic layer paved on the bridge deck is arranged between the tops of the two bridge deck plates, and the SMA-13 asphalt mastic layer is flush with the upper surface of the bridge deck pavement.

In this embodiment, one side that fixed steel sheet kept away from striding the seam steel sheet all is provided with square tooth, square tooth is through early strong type concrete and girder fixed connection to realize the fixed of square tooth, one side that fixed steel sheet is close to striding the seam steel sheet all is provided with first ripple tooth, the both sides of striding the seam steel sheet are provided with the second ripple tooth with first ripple tooth matched with.

In this embodiment, because two pontics because factors such as temperature, external force, can take place local deformation or flexible, be provided with the clearance between seam crossing steel sheet and the fixed steel sheet to it warp to hold the pontics, the below in clearance is provided with the waterproof layer, so as to avoid steam to float into from the clearance, the waterproof layer adopts rubber pad or epoxy mortar.

In this embodiment, in order to realize fixing between fixed steel sheet and the girder, be provided with a plurality of first holes on the fixed steel sheet, first hole interpolation is equipped with first vertical reinforcing bar, reserve on the girder to have be used for with first vertical steel bar welded exposed reinforcing bar, the upper portion and the fixed steel sheet welding of first vertical reinforcing bar, the exposed steel bar welding in lower part and the girder realizes the synchronous motion between fixed steel sheet and the girder.

In this embodiment, the ultra-high performance concrete slab is a precast slab, and the ultra-high performance concrete slab has superior material property indexes such as high strength, high durability and good impermeability, the high tensile strength can make up the defect that common concrete is easy to crack, prolong the service life of the structure, an upper reinforcing steel bar layer and a lower reinforcing steel bar layer are arranged in the ultrahigh-performance concrete slab, the upper reinforcing steel bar layer is formed by penetrating reinforcing steel bars, namely, the connecting reinforcing steel bars are a whole steel bar and are not broken in the middle, the lower reinforcing steel bar layer is formed by staggered reinforcing steel bars, namely, the connecting steel bars are connected in a staggered way to increase the deformation capacity of the UHPC plate, reserved steel bars are arranged at the two ends of the ultra-high performance concrete plate and are welded with the exposed steel bars of the bridge deck, the reserved steel bars are fixedly connected with the upper steel bar layer or the lower steel bar layer, and the ultra-high performance concrete slab is fixedly connected with the bridge deck through early strength concrete.

In this embodiment, be provided with a plurality of second holes on the ultra high performance concrete slab, the second hole is located the top of striding seam steel sheet, second vertical reinforcing bar is equipped with in the interpolation of second hole, the upper portion and the interior steel bar welding of high performance concrete slab of second vertical reinforcing bar, second vertical reinforcing bar lower part and the seam steel sheet of striding are welded mutually, second hole intussuseption is filled with ultra high performance concrete or early strong type concrete.

In this embodiment, the bottom of the ultra-high performance concrete panel is sawn to eliminate irregular cracks caused by the difference of thermal expansion coefficient.

A construction method based on a prefabricated UHPC plate-corrugated steel superposed bridge deck connecting structure comprises the following steps:

(1) prefabricating a UHPC plate, a fixed steel plate and a seam crossing steel plate according to the size and the requirement in a factory, and performing anticorrosion and antirust treatment;

(2) chiseling the bridge deck pavement, the bridge deck and the upper surface of the main beam part until the requirement of the installation depth is met and the reinforcing steel bars of the main beam part and the bridge deck are exposed;

(3) performing waterproof and anti-seepage treatment on the main beam, arranging a waterproof layer at a preset position, and performing leveling treatment to flatten the surface of the waterproof layer;

(4) mounting a fixed steel plate and a seam crossing steel plate at a preset position, and fixedly connecting square teeth on the fixed steel plate with a main beam through early-strength concrete; inserting a first vertical steel bar into a first hole in the fixed steel plate, welding the first vertical steel bar with the exposed steel bar of the main beam, and pouring early-strength concrete or ultra-high performance concrete into the first hole;

(5) laying a prefabricated UHPC plate between the tops of the two fixed steel plates, welding reserved steel bars with exposed steel bars of the bridge deck plate, inserting second vertical steel bars into second holes in the ultra-high performance concrete plate, welding the second vertical steel bars with the seam-crossing steel plates, and pouring early strength concrete or ultra-high performance concrete into the second holes;

(6) after the cast-in-place concrete reaches a certain strength, leveling the upper surface of the UHPC connecting plate; and (3) paving the SMA-13 asphalt mastic layer on the UHPC board, leveling, maintaining for 3-5 hours and opening traffic.

The above description is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various forms of the prefabricated UHPC plate-corrugated steel laminated bridge deck connection structure and the construction method thereof according to the teachings of the present invention need not be inventive, and all equivalent changes, modifications, substitutions and alterations made in the claims of the present invention shall be covered by the present invention without departing from the principle and spirit of the present invention.