A profiled steel plate-ultra high performance concrete composite bridge deck and construction method

Abstract

The application discloses a profiled steel plate-ultra-high performance concrete combined bridge deck slab, which comprises a profiled steel plate, self-tapping screws and ultra-high performance concrete, wherein the cross section of the profiled steel plate in the width direction presents a wave structure, the profiled steel plate is divided into a wave crest section, a plane section and end faces, the end faces are arranged at the outermost sides, a plurality of wave crest sections are arranged between the end faces, and the plane sections are arranged between the end faces and the wave crest sections and between the wave crest sections. The profiled steel plate at the bottom of the combined bridge deck slab is arranged in a wave structure, and a certain number of self-tapping screws are anchored in the ultra-high performance concrete, so that sufficient interface shear slip capacity is provided, the shear connection effect between the profiled steel plate and the ultra-high performance concrete is effectively ensured, and relative slipping of the profiled steel plate and the ultra-high performance concrete under load bearing is prevented. The self-tapping screws are convenient and fast to install, and the self-tapping screws only need to be punched into the profiled steel plate by using a nail gun, so that the great workload and construction precision problems caused by welding of shear connectors on the steel plate are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of structural engineering, and particularly relates to a profiled steel plate-ultra-high performance concrete composite bridge deck and a construction method. BACKGROUND

[0002] The bridge deck, also known as the driving deck, is a load-bearing structure directly bearing the wheel pressure of vehicles. In terms of structure, it is usually integrally connected with the main beam and the cross diaphragm, so as to not only transmit the vehicle load to the main beam, but also form a part of the main beam section and ensure the overall action of the main beam. At present, the bridge deck is generally divided into three types, namely, the concrete bridge deck, the steel bridge deck and the steel-concrete composite bridge deck. The concrete bridge deck has large rigidity, can well adapt to the asphalt concrete bridge deck pavement and the cement concrete bridge deck pavement, driving is more comfortable, and the cost is low, but the self-weight is large, which limits the span capacity, and a large amount of construction waste is generated in the formwork construction; the steel bridge deck has light self-weight and strong span capacity, but the cost is high, the fatigue problem is prominent, and the bridge deck pavement is prone to cracking and other diseases, and the durability is poor.

[0003] The steel-concrete composite bridge deck is a kind of composite bridge deck in which a steel plate is arranged at the bottom and concrete is poured at the upper part, and the two are connected by shear connectors. The steel-concrete composite bridge deck combines the advantages of steel and concrete, improves the bearing capacity, effectively solves a series of problems of the concrete bridge deck and the steel bridge deck, and has the following advantages: (1) increasing the rigidity of the bridge deck, effectively avoiding the cracking and other diseases of the bridge deck pavement, and driving is more comfortable; (2) reducing the self-weight of the bridge deck, effectively increasing the span capacity, and reducing the cost of the lower structure; (3) reducing construction waste and saving construction period, the bottom steel plate can bear the construction load as the concrete formwork and the construction formwork, and the steps of formwork erection and form removal are omitted, so that rapid construction can be realized.

[0004] However, the traditional steel-concrete composite bridge deck still has the following problems: (1) in order to ensure the effective connection between the steel and the concrete, a large number of shear connectors are usually welded on the steel plate, which affects the fatigue performance of the steel plate and greatly increases the construction workload; (2) the self-weight is large, and the ordinary concrete material in the negative bending moment area is prone to cracking, which affects the corrosion resistance and durability of the bridge deck and increases the cost of bridge maintenance and maintenance; (3) the steel plate part of the composite bridge deck needs to be welded and assembled on the construction site, and a large number of longitudinal and transverse stiffeners need to be welded under the steel plate, so the construction engineering quantity is large and the precision and quality are difficult to control.

[0005] In order to ensure the connection performance between the profiled steel plate and the concrete, the traditional method is to make indentations on the surface of the profiled steel plate or to weld transverse steel bars or shear connectors on the profiled steel plate, but the indentations sometimes cannot meet the shear requirements of the section, and the welding of the transverse steel bars or shear connectors increases a large amount of work, and the welds reduce the fatigue performance of the profiled steel plate.

[0006] As disclosed in Chinese patent 202110198430.9, a profiled steel plate-ultra-high toughness combined bridge deck is provided, which has circular holes opened at equal intervals on the web of the profiled steel plate, and a circular steel rod is transversely inserted through the circular holes. However, the profiled steel plate needs to be pre-drilled, which is labor-intensive. In addition, there is a certain gap between the hole and the circular steel rod, which is prone to slurry leakage. Finally, the circular steel rod is exposed to the air and is prone to rust. SUMMARY

[0007] In view of the above-mentioned defects of the prior art, a profiled steel plate-ultra-high performance concrete combined bridge deck and a construction method are provided, which can provide sufficient interface shear slip resistance, achieve full shear connection of the combined bridge deck, and have the characteristics of time and labor saving and reliable quality.

[0008] The technical scheme adopted by the present application to solve the above technical problems is:

[0009] A profiled steel plate-ultra-high performance concrete combined bridge deck, characterized in that it comprises

[0010] A profiled steel plate, the cross section of the profiled steel plate in the width direction presents a wave shape structure, the profiled steel plate is divided into a wave crest section, a flat section and an end face, the end face is arranged at the outermost side, a plurality of wave crest sections are arranged between the end faces, and the flat sections are arranged between the end faces and the wave crest sections and between the wave crest sections;

[0011] Self-tapping screws, a plurality of self-tapping screws are arranged at intervals along the length direction of the profiled steel plate on the wave crest sections and the end faces;

[0012] Ultra-high performance concrete, the ultra-high performance concrete is poured on the upper part of the profiled steel plate, and the thickness of the ultra-high performance concrete is higher than the height of the profiled steel plate.

[0013] According to the above technical scheme, the wave crest section presents a top horizontal, wide at the top and narrow at the bottom, and the plurality of self-tapping screws are arranged at intervals at the top of the wave crest section, and the self-tapping screws are driven from bottom to top.

[0014] According to the above technical scheme, the profiled steel plate wave crest section bottom groove is filled with polyurethane foam joint sealant, which isolates the self-tapping screws from the air and prevents rust.

[0015] According to the above technical scheme, the wave crest section presents a closed type, a plurality of self-tapping screws are arranged at intervals at the interface between the two side faces of the middle part of the wave crest section, and the self-tapping screws are driven along the horizontal direction.

[0016] According to the above technical scheme, the ultra-high performance concrete is mixed by high-performance premix, high-strength steel fiber, water reducing agent and water; the premix is composed of Portland cement, quartz sand, silica fume, fly ash and quartz powder.

[0017] A construction method of a profiled steel sheet-ultra-high performance concrete composite bridge deck plate, characterized in that: for any of the above profiled steel sheet-ultra-high performance concrete composite bridge deck plate, comprising the following steps:

[0018] S1: preparing a bridge design scheme, and determining the basic parameters of the profiled steel sheet and the self-tapping screw;

[0019] S2: erecting the steel girder on the substructure;

[0020] S3: precasting the profiled steel sheet according to the design requirements, and completing the purchase and installation of the self-tapping screw;

[0021] S4: transporting the profiled steel sheet to the construction site for erection, and welding the two ends of the profiled steel sheet to the steel girder using welding nails;

[0022] S5: pouring the ultra-high performance concrete on all the profiled steel sheets after erection, and carrying out moisture film curing on the surface of the bridge deck plate at room temperature until the design curing time.

[0023] According to the above technical scheme, in step S3, when the wave crest section adopts a neck-in type with a top horizontal, wide upper part and narrow lower part, the self-tapping screws are punched into the top plate of the wave crest section at a certain interval from bottom to top; the shank of the self-tapping screw penetrates through the top plate of the wave crest section, and the head of the self-tapping screw is anchored below the top plate of the wave crest section.

[0024] According to the above technical scheme, in step S3, the polyurethane foam joint filling agent is filled into the bottom groove of the wave crest section.

[0025] According to the above technical scheme, in step S3, when the wave crest section adopts a closed type, the self-tapping screws are punched into the two side surfaces of the middle part of the wave crest section at a certain interval along the horizontal direction, and the lengths of the self-tapping screws on the two sides of the middle part of the wave crest section are the same.

[0026] The present application has the following beneficial effects:

[0027] 1. A profiled steel sheet-ultra-high performance concrete composite bridge deck plate is proposed, which is composed of a profiled steel sheet, a self-tapping screw and ultra-high performance concrete; the profiled steel sheet at the bottom of the composite bridge deck plate is arranged in a wave shape structure, and a certain number of self-tapping screws are anchored in the ultra-high performance concrete, thereby providing sufficient interfacial shear slip resistance, effectively ensuring the shear connection effect between the profiled steel sheet and the ultra-high performance concrete, and preventing relative slip between the two when bearing load; the self-tapping screw is convenient and fast to install, and only needs to be punched into the profiled steel sheet using a nail gun, thereby saving the huge workload and construction precision problems caused by welding shear connectors on the steel sheet.

[0028] 2, The corrugation of the profiled steel plate ensures the longitudinal bending stiffness and overall torsional stiffness of the steel plate, compared with the traditional steel-concrete composite bridge deck plate which is welded with a large number of longitudinal and transverse stiffeners under the steel plate, the use of the profiled steel plate saves a large amount of welding work, and the steel plate itself without welds also greatly improves the structural fatigue performance.

[0029] 3, The polyurethane foam joint filling agent is filled in the groove at the bottom surface of the profiled steel plate, which can isolate the self-tapping screw from air and prevent the self-tapping screw from rusting.

[0030] 4, The super high performance concrete has superior performance, high strength, good crack resistance, good durability and good construction performance, so that the material consumption can be reduced, the construction period can be shortened, and the construction complexity can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the front view of the first embodiment provided by the application;

[0032] Figure 2 It is the side view of the first embodiment provided by the application;

[0033] Figure 3 It is the perspective view of the profiled steel plate in the first embodiment provided by the application;

[0034] Figure 4 It is the front view of the profiled steel plate in the first embodiment provided by the application;

[0035] Figure 5 It is the side view of the profiled steel plate in the first embodiment provided by the application;

[0036] Figure 6 It is the front view of the second embodiment provided by the application;

[0037] Figure 7 It is the side view of the second embodiment provided by the application;

[0038] Figure 8 It is the perspective view of the profiled steel plate in the second embodiment provided by the application;

[0039] Figure 9 It is the front view of the profiled steel plate in the second embodiment provided by the application;

[0040] Figure 10 It is the side view of the profiled steel plate in the second embodiment provided by the application;

[0041] Figure 11 It is the design construction flowchart of the embodiment provided by the application;

[0042] In the diagram, 1. Corrugated steel sheet; 1-1. Corrugated section; 1-2. Flat section; 1-3. End face; 2. Self-tapping screw; 3. Ultra-high performance concrete; 4. Polyurethane foam sealant. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Reference Figures 1-11 As shown, the present invention provides a composite bridge deck of profiled steel sheet and ultra-high performance concrete, comprising a profiled steel sheet 1, the profiled steel sheet having a corrugated cross-section in the width direction, the profiled steel sheet being divided into crest sections 1-1, planar sections 1-2, and end faces 1-3, the end faces being located on the outermost side, with several crest sections between the end faces, and planar sections located between the end faces and the crest sections, and between the crest sections; self-tapping screws 2, several self-tapping screws being spaced apart along the length direction of the profiled steel sheet on the crest sections and end faces; ultra-high performance concrete 3, ultra-high performance concrete being poured on the upper part of the profiled steel sheet, and the thickness of the ultra-high performance concrete being greater than the height of the profiled steel sheet.

[0045] This embodiment proposes a composite bridge deck consisting of profiled steel sheet and ultra-high performance concrete, comprising three parts: profiled steel sheet, self-tapping screws, and ultra-high performance concrete. The profiled steel sheet at the bottom of the composite bridge deck is designed as a corrugated structure and anchored in the ultra-high performance concrete using a certain number of self-tapping screws. This provides sufficient interfacial shear slip resistance, effectively ensuring the shear connection effect between the profiled steel sheet and the ultra-high performance concrete, and preventing relative slippage between the two when bearing loads. The self-tapping screws are easy and quick to install; they can be driven into the profiled steel sheet using a nail gun, eliminating the huge workload and construction accuracy problems caused by welding shear connectors to the steel sheet.

[0046] Furthermore, the crest section has a narrowing shape with a horizontal top and a wider top and a narrower bottom. Several self-tapping screws are spaced apart at the top of the crest section, and the self-tapping screws are driven in from bottom to top.

[0047] Furthermore, polyurethane foam sealant 4 is filled into the groove on the bottom surface of the corrugated section of the profiled steel sheet to isolate the self-tapping screws from the air and prevent them from rusting.

[0048] Furthermore, the crest section is closed-shaped, with several self-tapping screws spaced apart at the junction of the two sides in the middle of the crest section, and the self-tapping screws are driven in horizontally.

[0049] Furthermore, ultra-high performance concrete is composed of high-performance premixed materials, high-strength steel fibers, water-reducing agents, and water. The premixed materials consist of silicate cement, quartz sand, silica fume, fly ash, and quartz powder. The ultra-high performance concrete used has superior performance, high strength, good crack resistance, good durability, and good workability, which can shorten the construction period and reduce construction complexity while reducing material usage.

[0050] A construction method for a profiled steel sheet-ultra-high performance concrete composite bridge deck, used for any of the above-mentioned profiled steel sheet-ultra-high performance concrete composite bridge decks, includes the following steps:

[0051] S1: Draft the bridge design scheme and determine the profiled steel sheet model, size, and parameters such as the number, spacing, and model of self-tapping screws; the size, model, and other parameters of the profiled steel sheet and self-tapping screws can be adjusted according to the actual design and construction conditions, which significantly improves the modularity and assembly of the bridge deck system.

[0052] S2: Erecting the main steel beams on the substructure;

[0053] S3: Prefabricate profiled steel sheets in the factory according to design requirements, and complete the procurement and installation of self-tapping screws;

[0054] S4: Transport the profiled steel sheet to the construction site for erection, and use welding studs to weld the two ends of the profiled steel sheet to the main steel beam;

[0055] S5: High-performance concrete is poured onto all the profiled steel sheets after erection, and the bridge deck surface is then cured with a moisturizing film at room temperature until the designed curing time. Furthermore,

[0056] Furthermore, in step S3, when the crest section adopts a narrowing shape with a horizontal top and a wider top and a narrower bottom, self-tapping screws are driven into the top plate of the crest section from bottom to top at a certain interval; the body of the self-tapping screw passes through the top plate of the crest section, and the head of the self-tapping screw is anchored below the top plate of the crest section.

[0057] Furthermore, in step S3, polyurethane foam sealant is filled into the bottom groove of the crest section.

[0058] Furthermore, in step S3, when the crest segment adopts a closed type, self-tapping screws are driven into the horizontal direction at a certain interval at the junction of the two sides in the middle of the crest segment, and the self-tapping screws on both sides in the middle of the crest segment are of the same length.

[0059] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A composite bridge deck made of profiled steel sheet and ultra-high performance concrete, characterized in that: include Corrugated steel sheet has a corrugated cross-section in the width direction. Corrugated steel sheet is divided into crest sections, flat sections and end faces. The end faces are located on the outermost side. There are several crest sections between the end faces. The flat sections are located between the end faces and the crest sections, and between the crest sections. Self-tapping screws, a number of self-tapping screws are arranged at intervals along the length of the profiled steel sheet on the crest section and end face; Ultra-high performance concrete is poured on top of profiled steel sheets, and the thickness of the ultra-high performance concrete is greater than the height of the profiled steel sheets. The crest section has a narrowing shape with a horizontal top and a wider top and narrower bottom. Several self-tapping screws are spaced apart at the top of the crest section and are driven in from bottom to top. Polyurethane foam sealant is filled in the groove on the bottom surface of the corrugated steel sheet crest section to isolate the self-tapping screws from the air and prevent them from rusting. Alternatively, the crest section has a closed shape, with several self-tapping screws spaced apart at the junction of the two sides in the middle of the crest section and driven in horizontally. Ultra-high performance concrete is made by mixing high-performance premix, high-strength steel fiber, water-reducing agent and water; the premix consists of silicate cement, quartz sand, silica fume, fly ash and quartz powder.

2. A construction method for a composite bridge deck made of profiled steel sheet and ultra-high performance concrete, characterized in that: The composite bridge deck made of profiled steel sheet and ultra-high performance concrete as described in claim 1 includes the following steps: S1: Draft the bridge design scheme and determine the basic parameters of profiled steel sheets and self-tapping screws; S2: Erecting the main steel beams on the substructure; S3: Prefabricate profiled steel sheets in the factory according to design requirements, and complete the procurement and installation of self-tapping screws; S4: Transport the profiled steel sheet to the construction site for erection, and use welding studs to weld the two ends of the profiled steel sheet to the main steel beam; S5: Pour ultra-high performance concrete onto all the profiled steel sheets after the bridge deck is erected, and then apply a moisturizing film to the bridge deck surface at room temperature for the designed curing time.

3. The construction method of the profiled steel sheet-ultra-high performance concrete composite bridge deck according to claim 2, characterized in that: In step S3, when the crest section adopts a narrowing shape with a horizontal top and a wider top and a narrower bottom, self-tapping screws are driven into the top plate of the crest section from bottom to top at certain intervals; the body of the self-tapping screw passes through the top plate of the crest section, and the head of the self-tapping screw is anchored below the top plate of the crest section.

4. The construction method of the profiled steel sheet-ultra-high performance concrete composite bridge deck according to claim 3, characterized in that: In step S3, polyurethane foam sealant is filled into the bottom groove of the crest section.

5. The construction method of the composite bridge deck of profiled steel sheet-ultra-high performance concrete according to claim 2, characterized in that: In step S3, when the crest section adopts a closed type, self-tapping screws are driven into the horizontal direction at a certain interval at the junction of the two sides in the middle of the crest section, and the self-tapping screws on both sides in the middle of the crest section are of the same length.

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