Novel bridge deck slab structure and construction method

Abstract

The invention discloses a novel bridge deck structure and a construction method, and aims to solve the problems of welding fatigue of a steel bridge deck and easy aging of a concrete bridge deck in the prior art. The novel bridge deck structure comprises a prefabricated pedestal, a formwork, a top plate, a grid-shaped bottom plate and the like and is made of high-strength waterproof materials and ultrahigh-strength fiber concrete, and the construction strength, stability and durability are guaranteed. The construction method comprises the steps of bottom plate production, formwork installation, top plate pouring, maintenance treatment and the like. Compared with the prior art, the method has the advantages that the construction efficiency is improved, the construction period is shortened, the maintenance cost is reduced, and the service life of the bridge deck slab is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of anti-inflammatory cloth buckling, and in particular to a novel bridge deck structure and a construction method. Background Art

[0002] Urban highway steel bridges, due to the constraints of pier location, foundation size and on-site beam erection time, use a large number of conventional concrete structure bridge decks. The fatigue cracking of the welds between the bridge deck and the shear nails is obvious, which puts a certain burden on bridge maintenance and management. The concrete on the bottom of the bridge deck is peeling and flaking seriously. In order to achieve the same bearing capacity as ordinary concrete bridge decks without changing the structural scale of the lower structure piers and foundations, it is necessary to develop a new type of bridge deck. Summary of the invention

[0003] The purpose of the present invention is to solve the problems of fatigue cracking of welds of steel bridge decks and easy aging of concrete bridge decks in the prior art, and to propose a new bridge deck structure and construction method.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A new type of bridge deck structure, including a prefabricated pedestal, a formwork, a top plate, a lattice-type bottom plate, a high-strength waterproof layer, a bridge deck joint, a steel beam, bolts, ultra-high-strength fiber concrete, and a high-strength caulking material:

[0006] The prefabricated pedestal includes a concrete base, a steel plate, and reserved curing holes, and the template is arranged above the prefabricated pedestal;

[0007] The template is a shaped smooth steel template, and the bottom template of the shaped smooth steel template can be pulled apart and demoulded from both sides; the grid-shaped bottom plate is arranged above the template (2);

[0008] The lattice bottom plate is a lattice rib type composed of steel plates, which is arranged under the top plate and serves as the bottom plate of the bridge deck;

[0009] The top plate is a bridge deck top plate, which is cast with ultra-high strength fiber concrete; a strong waterproof layer is arranged above the top plate;

[0010] The high-strength waterproof layer is ultra-high-strength waterproof concrete, and an asphalt pavement is directly laid on the high-strength waterproof layer.

[0011] Preferably, the ultra-high strength fiber concrete is a cement-based composite material using ultra-high strength filling material and ultra-high strength fiber, and the water-cement ratio is lower than 24%.

[0012] Preferably, the high-strength filling material is composed of water, low-shrinkage concrete, fine aggregate, high-performance water-reducing agent, steel fiber, etc.

[0013] Preferably, the top plate has a thickness of 5 to 7 cm.

[0014] Preferably, the lattice-type bottom plate is a lattice-rib type composed of steel plates with a thickness of 4 mm, which is below the top plate and serves as the bottom plate of the bridge deck with a height of cm. It is processed in the back field. The steel plates are preferably serrated at the ends of the bridge deck joints.

[0015] 7. According to the novel bridge deck structure of claim 1, the steel beam is a box-chamber steel box beam composed of steel plates.

[0016] Preferably, the bolts are connecting fasteners used to connect the steel beam and the bridge deck, playing a role of rigid combined connection.

[0017] A construction method for a novel bridge deck structure comprises the following steps:

[0018] S1: The checkered ribbed steel plate bottom plate is produced in the back field, which is composed of a checkered bottom plate;

[0019] S2: Place the produced checkered ribbed bottom plate on the prefabricated pedestal, and install the bridge deck template on the bottom plate, wherein the bottom template is a removable steel plate;

[0020] S3: pouring the bridge deck top slab;

[0021] S4: After the top plate has initially set for 48 hours, the bottom formwork is removed by automated equipment, so that the top plate is embedded on the grid ribs by its own weight;

[0022] S5: After the top slab has finally set, pour 2cm of waterproof concrete on the top surface;

[0023] S6: Turn on the intelligent sprinkler system to regularly maintain the bridge deck;

[0024] S7: After the strength reaches the requirement, the bridge deck is transported to the steel beam for installation, the bridge deck joints are butt-jointed, and the steel beam and the bridge deck are connected with bolts;

[0025] S8: Use high-strength caulking material to properly treat the joints.

[0026] Compared with the prior art, the present invention provides a new bridge deck structure and construction method, which has the following beneficial effects:

[0027] The technical solution of the present invention ensures the strength, stability and durability of the bridge deck system construction. The bridge deck is a high-strength waterproof layer on the top surface of the prefabricated bridge deck. The waterproof layer is completed at the same time on the prefabricated bridge deck, which can save the construction of the waterproof layer of the prefabricated bridge deck and improve the construction efficiency. The bridge deck is prefabricated in the prefabrication yard and installed on site, which is convenient for construction. The bridge deck prefabricated by this method is light and durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the prefabricated construction elevation drawing of the present invention;

[0029] Figure 2 It is a structural elevation view of the present invention;

[0030] Figure 3 It is a structural plan view of the present invention;

[0031] Figure 4 It is a peg arrangement diagram of the present invention;

[0032] In the figure: 1. Prefabricated pedestal; 2. Formwork; 3. Top plate; 4. Grid-type bottom plate; 5. High-strength waterproof layer; 6. Serrated joint; 7. Steel beam; 8. Bolts. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] Embodiment 1

[0036] Reference Figure 1-4 As shown, a novel bridge deck structure includes a prefabricated pedestal 1, a template 2, a top plate 3, a lattice bottom plate 4, a high-strength waterproof layer 5, a bridge deck joint 6, a steel beam 7, a bolt 8, ultra-high-strength fiber concrete, and a high-strength caulking material. The prefabricated pedestal 1 includes a concrete base, a steel plate, and a reserved curing hole. The template is arranged above the prefabricated pedestal 1.

[0037] The template 2 is a shaped smooth steel template 2, and the bottom template 2 of the shaped smooth steel template 2 can be pulled apart and demoulded from both sides; the lattice bottom plate 4 is arranged above the template 2;

[0038] The lattice bottom plate 4 is a lattice rib type composed of steel plates, and is arranged under the top plate 3 as the bottom plate of the bridge deck;

[0039] The top plate 3 is a bridge deck top plate, which is cast with ultra-high strength fiber concrete; a strong waterproof layer 5 is arranged above the top plate 3;

[0040] The high-strength waterproof layer 5 is ultra-high-strength waterproof concrete, and an asphalt pavement is directly laid on the high-strength waterproof layer 5 .

[0041] A new type of bridge deck structure, the construction includes the following steps:

[0042] S1: A checkered ribbed steel plate bottom plate is produced in the back field, which is composed of a checkered bottom plate 4;

[0043] S2: placing the produced checkered ribbed bottom plate on the prefabricated pedestal 1, and installing the bridge deck template 2 on the bottom plate, wherein the bottom template 2 is a removable steel plate;

[0044] S3: pouring bridge deck top plate 3;

[0045] S4: After the top plate 3 has initially set for 48 hours, the bottom template 2 is removed by automated equipment, so that the top plate 3 is embedded on the grid ribs by its own weight;

[0046] S5: After the top plate 3 is finally set, pour 2 cm of waterproof concrete on the top surface;

[0047] S6: Turn on the intelligent sprinkler system to regularly maintain the bridge deck;

[0048] S7: After the strength reaches the requirement, the bridge deck is transported to the steel beam 7 for installation, the bridge deck joints 6 are butt-jointed, and the steel beam 7 and the bridge deck are connected by bolts 8;

[0049] S8: Use high-strength caulking material to prepare the joints.

[0050] Embodiment 2

[0051] On the basis of the first embodiment, the ultra-high strength fiber concrete is a cement-based composite material using ultra-high strength filling material and ultra-high strength fiber, and the water-cement ratio is less than 24%;

[0052] The high-strength joint filling material is composed of water, low-shrinkage concrete, fine aggregate, high-performance water-reducing agent, steel fiber, etc.

[0053] The top plate 3 has a thickness of 5 to 7 cm;

[0054] The lattice bottom plate 4 is a lattice rib type composed of a steel plate with a thickness of 4 mm, which is below the top plate 3 and serves as the bottom plate of the bridge deck. It has a height of cm and is processed in the back field. The steel plate material is QB345B;

[0055] Embodiment 3

[0056] On the basis of the above embodiment, the end of the bridge deck joint 6 adopts a serrated shape;

[0057] The steel beam 7 is a box room steel box beam, which is composed of steel plates;

[0058] The bolt 8 is a connecting fastener used to connect the steel beam 7 and the bridge deck, and plays a role of rigid combined connection.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel bridge deck structure, comprising a prefabricated pedestal (1), a formwork (2), a top plate (3), a lattice bottom plate (4), a high-strength waterproof layer (5), a bridge deck joint (6), a steel beam (7), bolts (8), ultra-high-strength fiber concrete, and a high-strength caulking material, characterized in that: The prefabricated pedestal (1) comprises a concrete base, a steel plate, and reserved curing holes, and the template is arranged above the prefabricated pedestal (1); The template (2) is a shaped smooth steel template (2), and the bottom template (2) of the shaped smooth steel template (2) can be pulled apart and demoulded from both sides; the grid-shaped bottom plate (4) is arranged above the template (2); The lattice bottom plate (4) is a lattice rib type composed of steel plates, and is arranged under the top plate (3) to serve as the bottom plate of the bridge deck; The top plate (3) is a bridge deck top plate, cast from ultra-high strength fiber concrete; a strong waterproof layer (5) is arranged above the top plate (3); The high-strength waterproof layer (5) is ultra-high-strength waterproof concrete, and an asphalt pavement is directly laid above the high-strength waterproof layer (5).

2. A new type of bridge deck structure according to claim 1, characterized in that: The ultra-high strength fiber concrete is a cement-based composite material using ultra-high strength filling material and ultra-high strength fiber, and the water-cement ratio is lower than 24%.

3. A new type of bridge deck structure according to claim 1, characterized in that: The high-strength joint filling material consists of water, low-shrinkage concrete, fine aggregate, high-performance water reducing agent, steel fiber and the like.

4. A new type of bridge deck structure according to claim 1, characterized in that: The top plate (3) has a thickness of 5 to 7 cm.

5. The novel bridge deck structure according to claim 1 is characterized in that: The lattice bottom plate (4) is a lattice rib type composed of a steel plate with a thickness of 4 mm. It is located below the top plate (3) and serves as the bottom plate of the bridge deck. It has a height of cm and is processed in the back field. The steel plate material is QB345B.

6. The novel bridge deck structure according to claim 1 is characterized in that: The end of the bridge deck joint (6) is in a serrated shape.

7. The novel bridge deck structure according to claim 1 is characterized in that: The steel beam (7) is a box room steel box beam, which is composed of steel plates.

8. The novel bridge deck structure according to claim 1 is characterized in that: The bolt (8) is a connecting fastener used for connecting the steel beam (7) and the bridge deck, and plays a role of rigid combined connection.

9. A construction method for a novel bridge deck structure according to any one of claims 1 to 8, comprising the following steps: S1: A checkered ribbed steel plate bottom plate is produced in the back field, which is composed of a checkered bottom plate (4); S2: placing the produced checkered ribbed bottom plate on the prefabricated pedestal (1), and installing the bridge deck template (2) on the bottom plate, wherein the bottom template (2) is a removable steel plate; S3: pouring the bridge deck top plate (3); S4: After the top plate (3) has initially set for 48 hours, the bottom template (2) is removed by automated equipment, so that the top plate (3) is embedded on the grid ribs by its own weight; S5: After the top plate (3) has finally set, pour 2 cm of waterproof concrete on the top surface; S6: Turn on the intelligent sprinkler system to regularly maintain the bridge deck; S7: After the strength reaches the required level, the bridge deck is transported to the steel beam (7) for installation, the bridge deck joints (6) are butt-jointed, and the steel beam (7) and the bridge deck are connected using bolts (8); S8: Use high-strength caulking material to prepare the joints.

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