A basalt fiber concrete composite beam and its construction method

Abstract

The present invention provides a basalt fiber reinforced concrete composite beam, comprising a concrete pier and a composite beam body fixed above adjacent concrete piers. The composite beam body comprises a precast concrete slab layer and an asphalt basalt layer above the precast concrete slab layer. The expansion joints of the butted composite beams and the top of the composite beam are filled with asphalt basalt. By pouring asphalt basalt slurry above the precast concrete slabs and in the expansion joints, the present invention forms a compressive composite beam after solidification, improving the compressive and corrosion resistance of the road surface and thus maintaining the road surface.

Description

Technical Field

[0001] The present invention belongs to the field of bridge engineering construction, and in particular relates to a basalt fiber concrete composite beam and a construction method thereof. Background Art

[0002] Existing bridges experience significant thermal expansion and contraction due to the cold winters and hot summers. Basalt is the best stone material for repairing roads, railways, and airport runways. It has strong compressive strength, good ductility, high toughness, low crushing value, strong corrosion resistance, good asphalt adhesion, wear resistance, low draft, and good insulation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to improve the compression resistance, ductility and crack resistance of the road surface. In order to solve the above problems, a basalt fiber concrete composite beam and a construction method thereof are provided.

[0004] The object of the present invention is achieved in the following manner:

[0005] A basalt fiber concrete composite beam includes a concrete pier and a composite beam body fixed above an adjacent concrete pier. The composite beam body includes a concrete precast slab casting layer and an asphalt basalt casting layer on the concrete precast slab casting layer, a butted composite beam expansion joint, and asphalt basalt filled above the composite beam.

[0006] Special-shaped steel bars are embedded in the lower part of the concrete precast slab layer, and both ends of the special-shaped steel bars extend out of the concrete precast slab layer, with the extended length being at least an anchoring length.

[0007] The construction method of the basalt fiber concrete composite beam comprises the following steps:

[0008] (1) First, a 1-2 cm thick asphalt basalt layer is poured into the mold;

[0009] (2) After that, the precast slab bottom plate of the concrete precast slab layer is cast, and special-shaped steel bars are embedded above the precast slab bottom plate and concrete is cast, with the embedded special-shaped steel bars extending out of the concrete precast slab layer by at least one anchoring length. After the concrete solidifies, the concrete precast slab layer is formed, and the solidified asphalt basalt casting layer and the concrete precast slab layer are bonded with asphalt emulsion adhesive to form a composite beam body;

[0010] (3) Bolt the butted composite beam body to the concrete pier, and pour asphalt basalt slurry on the upper surface of the butted composite beam body and in the expansion joint until the asphalt basalt at the expansion joint is flush with the asphalt basalt above the composite beam body.

[0011] Compared with the existing technology, the present invention forms a compressive composite beam by pouring asphalt basalt above the concrete precast slab and in the expansion joint, thereby improving the compressive resistance and corrosion resistance of the road surface and playing a role in maintaining the road surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] Figure 2 It is a schematic diagram of special-shaped steel bar structure.

[0014] Among them, 1 is the concrete precast slab layer; 11 is the precast slab bottom plate; 12 is the special-shaped steel bar; 2 is the first asphalt basalt casting layer; 3 is the concrete pier; 4 is the bolt; 5 is the expansion joint; 6 is the second asphalt basalt layer. DETAILED DESCRIPTION

[0015] like Figure 1 、 Figure 2 As shown, the present invention relates to a basalt fiber concrete composite beam, comprising a concrete pier 3 and a composite beam body fixed above an adjacent concrete pier, the composite beam body comprising a concrete precast slab casting layer 1 and a first asphalt basalt casting layer 2 on the concrete precast slab casting layer, an expansion joint 5 reserved between the butted composite beam bodies and asphalt basalt slurry poured above the composite beam, and a second asphalt basalt layer 6 formed in the space above the composite beam body and the expansion joint 5.

[0016] Specifically, the special-shaped steel bars 12 in the precast concrete slab 1 comprise two groups of steel bars, each group comprising several parallel steel bars. The two groups intersect and form an angle. Each precast concrete slab 1 has an extension at the intersection of the length and width ends. The extension serves to strengthen the rigidity of the precast concrete slab 1. The ends of the pre-embedded special-shaped steel bars 12 extend from the precast concrete slab 1 by at least an anchoring length to withstand various stresses. This is done by pouring asphalt basalt slurry into the expansion joint 5 between the two butted precast concrete slabs 1. After the slurry solidifies, the two precast concrete slabs 1 are fixedly connected. The special-shaped steel bars 12 in the expansion joint 5 work together with the solidified asphalt basalt to withstand various stresses. Precast concrete panels 1 are bolted to concrete piers 3. A 2cm-thick first asphalt basalt layer 2 is fixedly attached above the precast concrete panels 1, forming the composite beam body. The two butted composite beam bodies form expansion joints 5. Special-shaped rebar 12 extending from the precast concrete panels 1 are positioned within the expansion joints 5. Asphalt basalt slurry is poured into the expansion joints 5 and the upper portion of the composite beam, forming a second asphalt basalt layer 6. This ensures that the special-shaped rebar 12, expansion joints 5, composite beam body, and piers 3 are all secured together by the asphalt basalt slurry, allowing them to withstand various stresses. Once the asphalt basalt slurry solidifies, the resulting basalt fiber reinforced concrete composite beam exhibits strong compressive strength, low crushing value, strong corrosion resistance, excellent insulation properties, low draft, and high ductility.

[0017] The working process of the present invention is as follows:

[0018] First, the prepared uniform asphalt basalt slurry is poured into a mold to form a first asphalt basalt pouring layer 2 with a thickness of 2 cm;

[0019] Then, the first phase of concrete of the concrete precast slab layer 1 is poured. After the first phase of concrete solidifies, a precast slab bottom plate 11 is formed. Special-shaped steel bars 12 are placed on the precast slab bottom plate, with both ends of the special-shaped steel bars 12 extending out of the precast slab bottom plate 11 by at least one anchoring length. Concrete is cast integrally between the special-shaped steel bars 12 and the precast slab bottom plate 11 to form the concrete precast slab layer 1. The concrete precast slab layer 1 is bonded and fixed to the first asphalt basalt casting layer 2 with an asphalt emulsion adhesive to form a composite beam body.

[0020] The composite beam body is hoisted on the concrete pier 3 and fixedly connected to the concrete pier 3 with bolts 4 using common existing technology, forming an expansion joint 5 between the butted composite beam body and the concrete pier 3;

[0021] Finally, asphalt basalt slurry is poured into the expansion joint 5. The asphalt basalt slurry fills the expansion joint 5 and is laid above the composite beam body until the asphalt basalt slurry above the composite beam body is flush with the asphalt basalt slurry above the expansion joint 5, forming a second asphalt basalt layer 2 cm thick. After the slurry in the second asphalt basalt layer solidifies, a basalt fiber concrete composite beam is formed on the same horizontal line, and the construction is completed.

[0022] The basalt fiber concrete composite beam provided by the present invention has strong compression resistance, good ductility and strong corrosion resistance.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.

Claims

1. A method for constructing a basalt fiber reinforced concrete composite beam, the composite beam comprising a concrete pier and a composite beam body fixed above adjacent concrete piers, characterized in that: The composite beam body comprises a concrete precast panel (1) and a first asphalt basalt casting layer (2) on the concrete precast panel (1); an expansion joint (5) reserved between the butted composite beam bodies and an asphalt basalt slurry is poured and filled above the composite beam; and a second asphalt basalt layer (6) is formed in the space above the composite beam body and the expansion joint (5); Special-shaped steel bars (12) are provided in the concrete precast panel (1), wherein the special-shaped steel bars (12) include two groups of steel bars, each group of steel bars includes a plurality of parallel steel bars, the two groups of steel bars intersect and form an angle, and each concrete precast panel (1) has a steel bar extension end at the intersection of the ends in the length direction and the width direction; both ends of the embedded special-shaped steel bars (12) extend out of the concrete precast panel (1) by at least one anchoring length; The concrete precast panels (1) are bolted to the concrete piers (3), and a 2 cm thick first asphalt basalt casting layer (2) is fixedly connected above the concrete precast panels (1) to form a composite beam body. The composite beam bodies are butted against each other to form expansion joints (5), and the special-shaped steel bars (12) extending out of the concrete precast panels (1) are inside the expansion joints (5); The construction method includes the following steps: First, the prepared uniform asphalt basalt slurry is poured into a mold to form a first asphalt basalt pouring layer (2) with a thickness of 2 cm; Afterwards, the first phase of concrete of the concrete precast plate layer (1) is poured, and after the first phase of concrete solidifies, a precast plate bottom plate (11) is formed, and special-shaped steel bars (12) are placed on the precast plate bottom plate, with both ends of the special-shaped steel bars (12) extending out of the precast plate bottom plate (11) by at least one anchoring length, and the special-shaped steel bars (12) and the precast plate bottom plate (11) are integrally cast with concrete to form a concrete precast plate (1), and the concrete precast plate (1) is bonded and fixed to the first asphalt basalt casting layer (2) with an asphalt emulsion adhesive to form a composite beam body; The composite beam body is hoisted onto the concrete pier (3), and the composite beam body and the concrete pier (3) are fixedly connected, so that an expansion joint (5) is formed between the butted composite beam body and the concrete pier (3); Finally, asphalt basalt slurry is poured into the expansion joint (5), the asphalt basalt slurry fills the expansion joint (5) and is laid above the composite beam body until the asphalt basalt slurry above the composite beam body is flush with the asphalt basalt slurry above the expansion joint (5), forming a second asphalt basalt layer (6) 2 cm thick. After the slurry in the second asphalt basalt layer solidifies, a basalt fiber concrete composite beam on the same horizontal line is formed, and the construction is completed.

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