阅读说明：本技术 一种高性能混组合钢桥面铺装层结构及其施工方法 (High-performance concrete combined steel bridge deck pavement layer structure and construction method thereof ) 是由 何训林 王增全 王广州 孔德勇 叶笛 刘元炜 于 2019-09-30 设计创作，主要内容包括：本发明公开一种高性能混组合钢桥面铺装层结构及其施工方法,涉及公路桥梁工程技术领域,其技术方案要点是：包括钢桥箱梁面板,钢桥箱梁面板顶面铺装有厚度为80mm的高性能混凝土层；高性能混凝土层顶面铺装有沥青混凝土路面层；钢桥箱梁面板顶面布设有位于高性能混凝土层内的钢筋网；钢桥箱梁面板顶面等间距焊接有剪力钉。能够保证该高性能混组合钢桥面铺装层结构具备高耐久性、高工作性和高体积稳定性的效果；此外,高性能混凝土的集料均为玄武岩碎石,并掺有玄武岩纤维,其市场价为660元/m<Sup>3</Sup>,是超高性能混凝土市场价33000元/m<Sup>3</Sup>的2％,极为经济。本发明已经获得国家重点研发计划资助,课题名称为：组合结构城市桥梁高效施工关键技术研究,课题编号为：2017YFC0703408。(3 3 The invention discloses a high-performance concrete combined steel bridge deck pavement layer structure and a construction method thereof, and relates to the technical field of highway bridge engineering.)

1. the utility model provides a layer structure of mating formation of high performance concrete combination steel bridge deck, assembles and welds into holistic steel bridge box girder panel (1) including the prefabricated scene of segmentation, characterized by: a high-performance concrete layer (2) is paved on the top surface of the steel bridge box girder panel (1), and the thickness of the high-performance concrete layer (2) is 80 mm; the top surface of the high-performance concrete layer (2) is paved with an asphalt concrete pavement layer (3); the top surface of the steel bridge box girder panel (1) is provided with a reinforcing mesh (4) positioned in the high-performance concrete layer (2); the steel bridge box girder comprises a steel bridge box girder panel (1), and is characterized in that shear nails (5) are arranged on the top surface of the steel bridge box girder panel (1), the shear nails (5) are arranged at equal intervals according to a quincunx shape, and the intervals between the shear nails (5) and the shear nails (5) are 300 mm.

2. The pavement structure of the high-performance concrete combined steel bridge deck as claimed in claim 1, wherein: the reinforcing mesh (4) is composed of bridge-following longitudinal reinforcing steel bars (6) longitudinally arranged on the top surface of the steel bridge box girder panel (1) along the bridge direction and bridge-following transverse reinforcing steel bars (7) arranged on the top surface of the bridge-following longitudinal reinforcing steel bars (6), and the diameters of the bridge-following longitudinal reinforcing steel bars (6) and the bridge-following transverse reinforcing steel bars (7) are 10 mm; the longitudinal steel bars (6) of the bridge are arranged at equal intervals, and the interval between the longitudinal steel bars (6) of the bridge is 100 mm; arrange for equidistant following bridge horizontal reinforcing bar (7), and be 100mm along the interval between the bridge horizontal reinforcing bar (7).

3. the pavement structure of the high-performance concrete combined steel bridge deck as claimed in claim 2, wherein: and each node of the longitudinal steel bar (6) along the bridge and each node of the transverse steel bar (7) along the bridge are firmly tied and tied through 24-size 0.55mm lead wires (8) to form a steel mesh (4) sheet with the length and width of 100 mm.

4. The pavement structure of the high-performance concrete combined steel bridge deck as claimed in claim 2, wherein: a plurality of concrete cushion blocks (9) are arranged on the bottom surface of the longitudinal steel bar (6) of the downbridge, and the length, the width and the height of each concrete cushion block (9) are all 30 mm; the concrete cushion blocks (9) are distributed in a plum blossom shape, and the distance between the concrete cushion blocks (9) is 600 mm.

5. The pavement structure of the high-performance concrete combined steel bridge deck as claimed in claim 2, wherein: the longitudinal steel bars (6) and the transverse steel bars (7) are arranged in the middle of the high-performance concrete layer (2) in the height direction.

6. A construction method of a pavement layer structure of a high-performance concrete-combined steel bridge deck is characterized by comprising the following steps: the method specifically comprises the following steps:

1) assembling steel bridge box girder panels (1), assembling the steel bridge box girder panels (1) at a bridge site on site, welding joints, performing on-site welding on shear nails (5) which are not welded on the top surfaces (1) of the steel bridge box girders in a factory at the joint welding joints, performing on-site rust removal, spraying antirust paint, performing antirust treatment, and inspecting the welding of the shear nails (5) on the top surfaces of the steel bridge box girder panels (1) and the antirust layers of the steel bridge box girder panels (1) and the shear nails (5);

2) Binding and laying a reinforcing mesh (4), arranging longitudinal bridge-following reinforcements (6) with the diameter of 10mm along the longitudinal bridge direction at the top surface of the steel bridge box girder panel (1) at equal intervals of 100mm, then arranging transverse bridge-following reinforcements (7) with the diameter of 10mm along the transverse bridge direction at the top surface of the longitudinal bridge-following reinforcements (6) at the top surface of the steel bridge box girder (1) at equal intervals of 100mm, and adopting 24-sized lead wires (8) with the diameter of 0.55mm to firmly bind the longitudinal bridge-following reinforcements (6) and the transverse bridge-following reinforcements (7) at each node of the longitudinal bridge-following reinforcements (6) and the transverse bridge-following reinforcements (7) to form a reinforcing mesh (4) sheet with the diameter of 100 multiplied by 100 mm;

3) the concrete cushion blocks (9) are supported, the concrete cushion blocks (9) are distributed on the bottom surfaces of the longitudinal reinforcing steel bars (6) along the bridge according to quincunx, the length, the width and the height of the concrete cushion blocks (9) are all 30mm, and the distance between the concrete cushion blocks (9) is 600 mm;

4) Cleaning the top surface (1) of the steel bridge box girder, and blowing the top surface of the steel bridge box girder panel (1) clean by using an air compressor rubber hose tuyere;

5) Pouring high-performance concrete, pouring the high-performance concrete which is intensively mixed in a mixing station on the top surface of the steel bridge box girder panel (1) to serve as a high-performance concrete layer (2) in a top surface paving structure of the steel bridge box girder panel (1), wherein aggregate in the high-performance concrete adopts hard basalt, basalt fiber is doped in the high-performance concrete, and the reinforcing mesh (4) which is bound and distributed on the top surface of the steel bridge box girder panel (1) in the step 3) is positioned in the high-performance concrete layer (2);

6) Paving the asphalt concrete pavement, after the high-performance concrete poured in the step 5) is initially set and the curing period is over, performing rough treatment on the top surface of the high-performance concrete layer (2), spraying bonding asphalt, and paving the asphalt concrete pavement.

7. The construction method of the pavement layer structure of the high-performance concrete combined steel bridge deck as claimed in claim 6, wherein the construction method comprises the following steps: the thickness of the high-performance concrete layer (2) paved by pouring the high-performance concrete in the step 5) is 80 mm.

8. The construction method of the pavement layer structure of the high-performance concrete combined steel bridge deck as claimed in claim 6, wherein the construction method comprises the following steps: the steel bridge box girder panel (1) in the step 1) is prefabricated in a factory in sections, the shear nails (5) are welded on the top surface of the steel bridge box girder panel (1) in a factory, and the shear nails (5) and the steel bridge box girder panel (1) are sprayed with anti-rust paint in the factory for anti-rust treatment; the shear nails (5) are arranged at equal intervals in a quincunx manner, and the standard interval of the shear nails (5) is 300mm multiplied by 300 mm.

Technical Field

The invention relates to the technical field of highway bridge engineering, in particular to a pavement layer structure of a high-performance concrete-combined steel bridge deck.

Background

As an important component of a bridge driving system, the safety, comfort, bridge durability and visual impression of driving are directly affected by the pavement quality of a bridge deck. Bridge pavement requires higher strength, deformation resistance, stress, and fatigue durability of the bonding layer and the pavement layer than a road pavement. Due to the particularity of bridge design and the influence of environmental conditions, steel bridge deck pavement is an engineering problem all the time.

Disclosure of Invention

The invention aims to provide a high-performance concrete combined steel bridge deck pavement layer structure and a construction method thereof, which can ensure that the high-performance concrete combined steel bridge deck pavement layer structure has the effects of high durability, high workability and high volume stability, can reduce the cost of the steel bridge deck pavement layer structure, and ensure that the pavement construction process of the steel bridge deck pavement layer structure is simple.

The technical purpose of the invention is realized by the following technical scheme: a pavement layer structure of a high-performance concrete combined steel bridge deck comprises a steel bridge box girder panel which is prefabricated in sections and assembled on site and welded into a whole, wherein a high-performance concrete layer is paved on the top surface of the steel bridge box girder panel, and the thickness of the high-performance concrete layer is 80 mm; the top surface of the high-performance concrete layer is paved with an asphalt concrete pavement layer; the top surface of the steel bridge box girder panel is provided with a reinforcing mesh positioned in the high-performance concrete layer; the top surface of the steel bridge box girder panel is provided with shear nails which are arranged at equal intervals in a quincunx manner, and the intervals between the shear nails are 300 mm.

By adopting the technical scheme, in the process of paving the pavement layer structure of the high-performance mixed combined steel bridge, the pavement layer structure of the steel bridge can ensure the effects of high durability, high workability and high volume stability through the high-performance concrete layer; meanwhile, the cost of the steel bridge pavement layer structure is reduced through the high-performance concrete layer, and the pavement construction process is simple; the high-performance concrete layer is conveniently paved through the reinforcing mesh; meanwhile, the stability of the high-performance concrete layer structure paved on the top surface of the steel bridge box girder panel is ensured through the reinforcing mesh; the connection among the steel bridge box girder panel, the reinforcing mesh and the high-performance concrete is facilitated through the shear nails; through steel bridge box girder panel, high performance concrete layer and the asphalt concrete pavement layer of laying in the high performance concrete layer top surface, be convenient for constitute high performance and mix combination steel bridge deck pavement layer structure to make this high performance mix combination steel bridge deck pavement layer structure when possessing high durability, high workability and high volume stability's effect, still reduced the cost of steel bridge pavement layer structure, and make this steel bridge pavement layer structure's the construction process of mating formation simple.

The invention is further configured to: the reinforcing mesh consists of bridge-following longitudinal reinforcing steel bars longitudinally arranged on the top surface of the steel bridge box girder panel along the bridge direction and bridge-following transverse reinforcing steel bars arranged on the top surface of the bridge-following longitudinal reinforcing steel bars, and the diameters of the bridge-following longitudinal reinforcing steel bars and the bridge-following transverse reinforcing steel bars are 10 mm; the longitudinal steel bars along the bridge are arranged at equal intervals, and the interval between the longitudinal steel bars along the bridge is 100 mm; arrange for equidistant following the horizontal reinforcing bar of bridge, and be 100mm along the interval between the horizontal reinforcing bar of bridge.

By adopting the technical scheme, the longitudinal steel bars along the bridge and the transverse steel bars along the bridge which are arranged at equal intervals and have the interval of 100mm are used for conveniently forming the steel bar mesh, so that the pouring of a high-performance concrete layer on the top surface of the steel bridge box girder panel is facilitated; meanwhile, the stability of a high-performance concrete layer structure formed by pouring high-performance concrete is facilitated through the longitudinal steel bars along the bridge and the transverse steel bars along the bridge.

The invention is further configured to: and each node of the longitudinal steel bar of the following bridge and the transverse steel bar of the following bridge is firmly tied through 24-size 0.55mm lead wires to form a steel bar net piece with the length and the width of 100 mm.

through adopting above-mentioned technical scheme, through No. 24 0.55mm plumbous silk, be convenient for will be in the same direction as the vertical reinforcing bar of bridge and in the same direction as every node of the horizontal reinforcing bar of bridge firmly the ligature to make in the same direction as the vertical reinforcing bar of bridge and in the same direction as the horizontal reinforcing bar of bridge formation reinforcing bar net piece.

the invention is further configured to: a plurality of concrete cushion blocks are arranged on the bottom surface of the longitudinal reinforcing steel bar of the downbridge, and the length, the width and the height of each concrete cushion block are all 30 mm; the concrete cushion blocks are distributed in a plum blossom shape, and the distance between the concrete cushion blocks is 600 mm.

By adopting the technical scheme, the concrete cushion blocks distributed in a plum blossom shape are beneficial to fixing the positions of longitudinal reinforcements along the bridge and transverse reinforcements along the bridge; simultaneously, through the concrete cushion, be convenient for prevent to rust along the vertical reinforcing bar of bridge and along the horizontal reinforcing bar of bridge to realize the durability of high performance concrete layer structure.

The invention is further configured to: the longitudinal steel bars along the bridge and the transverse steel bars along the bridge are arranged in the middle of the high-performance concrete layer in the height direction.

Through adopting above-mentioned technical scheme, in the middle of high performance concrete layer direction of height along the vertical reinforcing bar of bridge and along the horizontal reinforcing bar of bridge, do benefit to the guarantee along the vertical reinforcing bar of bridge and along the cohesion between the horizontal reinforcing bar of bridge and the high performance concrete layer to be convenient for guarantee the stability of high performance concrete layer's structure.

A construction method of a pavement layer structure of a high-performance concrete-combined steel bridge deck specifically comprises the following steps:

1) Assembling steel bridge box girder panels, assembling the steel bridge box girder panels at a bridge site on site, welding joints, performing on-site welding on shear nails which are not welded on the top surfaces of the steel bridge box girder panels in a factory at the joint positions, performing on-site rust removal, spraying rust-proof paint for rust prevention, and inspecting the welding of the shear nails of the steel bridge box girder panels and the rust-proof layers of the steel bridge box girder panels and the shear nails;

2) Binding and laying a reinforcing mesh, arranging longitudinal bridge-following reinforcing steel bars with the diameter of 10mm along the bridge direction at the top surface of a steel bridge box girder panel at equal intervals of 100mm, then arranging transverse bridge-following reinforcing steel bars with the diameter of 10mm along the bridge direction at the top surface of the longitudinal bridge-following reinforcing steel bars at equal intervals of 100mm on the top surface of the steel bridge box girder panel, and firmly binding the longitudinal bridge-following reinforcing steel bars and the transverse bridge-following reinforcing steel bars by adopting No. 24 lead wires with the diameter of 0.55mm at each node of the longitudinal bridge-following reinforcing steel bars and the transverse bridge-following reinforcing steel bars to form a reinforcing mesh sheet of 100 multiplied by 100 mm;

3) The concrete cushion blocks are distributed on the bottom surface of the longitudinal steel bar of the downbridge according to the quincunx shape, the length, the width and the height of the concrete cushion blocks are all 30mm, and the distance between the concrete cushion blocks is 600 mm;

4) Cleaning the top surface of the steel bridge box girder panel, and blowing the top surface of the steel bridge box girder panel clean by using an air compressor rubber hose tuyere;

5) Pouring high-performance concrete, pouring the high-performance concrete which is intensively mixed in a mixing station on the top surface of the steel bridge box girder panel to serve as a high-performance concrete layer in the pavement structure of the top surface of the steel bridge box girder panel, wherein aggregate in the high-performance concrete adopts hard basalt, basalt fiber is doped in the high-performance concrete, and the reinforcing mesh which is bound and distributed on the top surface of the steel bridge box girder panel in the step 3) is positioned in the high-performance concrete layer;

6) Paving the asphalt concrete pavement, after the high-performance concrete poured in the step 5) is initially set and the curing period is over, performing rough treatment on the top surface of the high-performance concrete layer, spraying bonding asphalt, and paving the asphalt concrete pavement.

The invention is further configured to: the thickness of the high-performance concrete layer paved by pouring the high-performance concrete in the step 5) is 80 mm.

The invention is further configured to: the steel bridge box girder panel in the step 1) is prefabricated in a factory in sections, the shear nails are welded on the top surface of the steel bridge box girder panel in the factory, and the shear nails and the steel bridge box girder panel are sprayed with antirust paint in the factory for antirust treatment; the shear nails are arranged at equal intervals in a quincunx manner, and the standard interval of the shear nails is 300mm multiplied by 300 mm.

in conclusion, the invention has the following beneficial effects: the steel bridge pavement layer can be ensured to have the effects of high durability, high workability and high volume stability through the high-performance concrete layer; meanwhile, the cost of the steel bridge pavement layer structure is reduced through the high-performance concrete layer, and the pavement construction process is simple; the high-performance concrete layer is conveniently paved through the reinforcing mesh; meanwhile, the stability of the high-performance concrete layer structure paved on the top surface of the steel bridge box girder panel is ensured through the reinforcing mesh; the connection among the steel bridge box girder panel, the reinforcing mesh and the high-performance concrete is facilitated through the shear nails; through steel bridge box girder panel, high performance concrete layer and the asphalt concrete pavement layer of laying in high performance concrete layer top surface, be convenient for constitute high performance and mix combination steel bridge deck pavement layer structure, thereby make this high performance mix combination steel bridge deck pavement layer structure possess high durability, high workability and high volume stability's effect in, the cost of steel bridge pavement layer structure has still been reduced, and this steel bridge pavement layer structure's the construction process of mating formation is simple, need not lay the on-the-spot steam health preserving of mating formation at steel bridge deck pavement layer, construction economic cost is low.

drawings

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

Fig. 2 is a schematic view of a connection structure of a reinforcing mesh and a shear pin in embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of a reinforcing mesh and a concrete pad in example 1 of the present invention;

fig. 4 is a construction flowchart in embodiment 2 of the present invention.

In the figure: 1. a steel bridge box girder panel; 2. a high performance concrete layer; 3. an asphalt concrete pavement layer; 4. a reinforcing mesh; 5. shear nails; 6. longitudinal steel bars along the bridge; 7. transverse steel bars along the bridge; 8. lead wire; 9. a concrete pad.

Detailed Description

The invention is described in further detail below with reference to figures 1-4.