Prefabricated UHPC ribbed plate-concrete composite bridge deck structure and construction method thereof

Abstract

The invention provides a prefabricated UHPC ribbed plate-concrete composite bridge deck slab structure and a construction method thereof.A UHPC ribbed plate of the prefabricated UHPC ribbed plate-concrete composite bridge deck slab structure comprises a plurality of rib parts shaped like a Chinese character'tian 'and plate parts connected to the rib parts, the strength and shearing resistance of the structure are guaranteed, meanwhile, the cement consumption is reduced, and the construction cost is reduced. The carbon emission is reduced, the whole self weight is reduced, and the transportation is convenient; meanwhile, factory production is adopted in the whole manufacturing process, the material consumption can be accurately controlled, and generation of building waste is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of building bridges, and in particular, to a precast UHPC ribbed slab-concrete composite bridge deck structure and a construction method thereof. Background Art

[0002] A precast concrete bridge deck refers to a concrete slab member prefabricated in a factory or a specific prefabrication site through processes such as casting and curing using a mold. The significant advantages of a precast concrete bridge deck are fast construction speed and controllable quality, and it has broad development prospects.

[0003] However, after the bridge deck is prefabricated in the prefabrication factory, it still needs to be transported to the construction site. Since the bridge deck needs to bear a large load, the precast bridge deck is generally thick and has a large self-weight, resulting in high transportation and hoisting costs. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a precast UHPC ribbed slab-concrete composite bridge deck structure and a construction method thereof to solve the above problems.

[0005] The present invention adopts the following solutions:

[0006] The present application provides a precast UHPC ribbed slab-concrete composite bridge deck structure, including at least one precast UHPC ribbed slab and a cast-in-place concrete bridge deck;

[0007] The UHPC ribbed slab includes a plurality of first longitudinal bars arranged at intervals in the transverse direction and a plurality of first transverse bars arranged at intervals in the longitudinal direction; and a plurality of first stirrups are arranged at intervals in the longitudinal direction on the longitudinal bars, and a plurality of second stirrups are arranged at intervals in the transverse direction on the transverse bars; the first longitudinal bars and the first transverse bars are connected to the bottom of the stirrups, and a plurality of "tian" (Chinese character for field)-shaped first steel meshes are integrally formed; ultra-high performance concrete is cast on the first steel mesh, including casting into a plurality of "tian"-shaped rib portions and a slab portion connected to the rib portions, and the upper part of the stirrup protrudes from the slab portion by a certain height;

[0008] The concrete bridge deck includes a second steel mesh and concrete cast on the second steel mesh; the steel mesh includes second longitudinal bars and second transverse bars; and part of the second longitudinal bars are longitudinally penetrated and connected to the upper part of the first stirrups, and part of the second transverse bars are transversely penetrated and connected to the upper part of the second stirrups.

[0009] Further, it further includes a steel beam, and stud bolts are fixedly connected to the steel beam; stud bolt holes are reserved on the UHPC ribbed slab.

[0010] Further, the steel beam is an I-beam.

[0011] Furthermore, one of the first longitudinal bars is respectively connected to two bent portions at the inner bottom of the first stirrup; one of the first transverse bars is respectively connected to two bent portions at the inner bottom of the second stirrup.

[0012] A construction method of the precast UHPC ribbed slab-concrete composite bridge deck structure as described above is characterized by including the following construction steps:

[0013] First, connect the first longitudinal bars, the first transverse bars, the first stirrups and the second stirrups in a prefabrication factory to form a first steel bar mesh;

[0014] Then, formwork the first steel bar mesh and pour ultra-high performance concrete to form a precast UHPC ribbed slab with the rib portion and the slab portion, and the upper part of the stirrup protrudes from the slab portion by a certain height.

[0015] After transporting the precast UHPC ribbed slab to the construction site for installation, pass through and connect the second longitudinal bars on the upper part of the first stirrup, and pass through and connect the second transverse bars on the upper part of the second stirrup to form a second steel bar mesh;

[0016] Finally, formwork the second steel bar mesh and pour concrete.

[0017] By adopting the above technical solutions, the present invention can achieve the following technical effects:

[0018] The present invention provides a precast UHPC ribbed slab-concrete composite bridge deck structure, the UHPC ribbed slab of which includes a plurality of "field"-shaped rib portions and a slab portion connected to the rib portions. While ensuring strength and shear resistance, this structure reduces the amount of cement used, helps reduce carbon emissions, reduces the overall self-weight, and is convenient for transportation; at the same time, the entire manufacturing process adopts factory production, which can accurately control the material usage and reduce the generation of construction waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the upper structure of the UHPC ribbed slab of a precast UHPC ribbed slab-concrete composite bridge deck according to an embodiment of the present invention;

[0021] Figure 2This is a schematic diagram of a first steel mesh structure of a prefabricated UHPC ribbed plate-concrete composite bridge deck according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the bottom surface structure of a UHPC ribbed slab of a prefabricated UHPC ribbed slab-concrete composite bridge deck according to an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of two UHPC ribbed plates after being assembled according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of a second steel mesh structure of a prefabricated UHPC ribbed plate-concrete composite bridge deck according to an embodiment of the present invention;

[0025] Figure 6 It is a structural schematic diagram of a prefabricated UHPC ribbed slab-concrete composite bridge deck after the second steel mesh is connected to the UHPC ribbed slab in an embodiment of the present invention;

[0026] Figure 7 yes Figure 6 Schematic diagram of the structure after pouring concrete;

[0027] Icon: UHPC ribbed slab 1, first transverse reinforcement 2, first longitudinal reinforcement 3, second stirrup 4, first stirrup 5, steel beam 6, bolt 7, concrete bridge deck 8, second transverse reinforcement 9, second longitudinal reinforcement 10, slab 11, rib 12. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] Example

[0030] Combination Figures 1 to 7 As shown, this embodiment provides a prefabricated UHPC ribbed plate-concrete composite bridge deck structure, including at least one prefabricated UHPC ribbed plate 1, and a cast-in-place concrete bridge deck 8;

[0031] In this embodiment, taking the example of having two of the UHPC ribbed plates 1:

[0032] The UHPC ribbed plate 1 includes a plurality of first longitudinal bars 3 arranged at intervals transversely, and a plurality of first transverse bars 2 arranged at intervals longitudinally; and a plurality of first stirrups 5 are arranged at intervals longitudinally on the longitudinal bars, and a plurality of second stirrups 4 are arranged at intervals transversely on the transverse bars; the first longitudinal bars 3 and the first transverse bars 2 are connected to the bottom bends of the stirrups, integrally forming a plurality of "field"-shaped first steel bar meshes.

[0033] Ultra-high performance concrete is poured on the first steel bar mesh. Among them, as Figure 3 shown, it includes a plurality of "field"-shaped rib portions 12 poured, and a plate portion 11 connected to the rib portions 12, and the upper parts of the stirrups protrude from the plate portion 11 by a certain height;

[0034] The structure of the UHPC ribbed plate 1 uses ultra-high performance concrete, which has super strong mechanical properties, high toughness, ultra-high durability and excellent pouring and forming properties, enabling it to well bear the subsequent cast-in-place concrete on site, and jointly participating in the work after forming an integral body with the post-cast concrete, making the bridge deck have excellent mechanical properties. And the structure of the UHPC ribbed plate 1 forming a plurality of "field"-shaped rib portions 12 and a plate portion 11 connected to the rib portions 12 greatly reduces the cement consumption while ensuring strength and shear resistance, reduces the overall self-weight, and is convenient for transportation.

[0035] In this embodiment, there are also three I-beam steel girders 6, and stud bolts 7 are fixedly connected to the steel girders 6; stud bolt holes are reserved on the UHPC ribbed plate 1. Two of the UHPC ribbed plates 1 are installed on the steel girders 6 through the stud bolts 7 and the stud bolt holes. Quick connection is achieved through the stud bolts 7 and the stud bolt holes.

[0036] The concrete bridge deck 8 includes a second steel bar mesh and concrete poured on the second steel bar mesh; the steel bar mesh includes second longitudinal bars 10 and second transverse bars 9; some of the second longitudinal bars 10 are longitudinally penetrated and connected to the upper parts of the first stirrups 5, and some of the second transverse bars 9 are transversely penetrated and connected to the upper parts of the second stirrups 4. The setting of the second longitudinal bars 10 and the second transverse bars 9 penetrated and connected to the stirrups makes the connection between it and the UHPC ribbed plate 1 closer and firmer after pouring the concrete to form the concrete bridge deck 8, further enhancing the integrity and load-bearing capacity of the structure.

[0037] The following describes the construction method of the precast UHPC ribbed plate-concrete composite bridge deck structure, which specifically includes the following construction steps:

[0038] First, the first longitudinal reinforcement 3, the first transverse reinforcement 2, the first stirrup 5 and the second stirrup 4 are connected in a prefabrication plant to form a first steel mesh; wherein the first longitudinal reinforcement 3 and the first transverse reinforcement 2 are passed through and connected to the bottom bends of the first reinforcement and the second stirrup 4;

[0039] Then, the first steel mesh is molded and cast with ultra-high performance concrete to form a prefabricated UHPC ribbed plate 1 having the ribs 12 and the plate 11, and the upper part of the stirrups protrudes from the plate 11 by a certain height;

[0040] After the UHPC ribbed plate 1 is transported to the construction site for installation, the second longitudinal reinforcement 10 is connected to the upper part of the first stirrup 5, and the second transverse reinforcement 9 is connected to the upper part of the second stirrup 4 to form a second steel mesh; wherein the installation is performed by fixing the bolt holes reserved on the UHPC ribbed plate 1 and the bolts 7 connected to the steel beam 6;

[0041] Finally, the second steel mesh is formworked and concrete is poured.

[0042] The prefabricated UHPC ribbed plate 1 has a light weight and is easy to be hoisted and installed at the construction site; on site, only the second steel mesh needs to be built and the formwork and casting need to be carried out on the basis of the UHPC ribbed plate 1, and the construction is simple and convenient.

[0043] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

Claims

1. A prefabricated UHPC ribbed plate-concrete composite bridge deck structure, characterized in that: Comprising at least one precast UHPC ribbed slab and a cast-in-place concrete bridge deck; The UHPC ribbed slab includes a plurality of first longitudinal bars arranged at intervals transversely and a plurality of first transverse bars arranged at intervals longitudinally; and a plurality of first stirrups are arranged at intervals longitudinally on the longitudinal bars, and a plurality of second stirrups are arranged at intervals transversely on the transverse bars; the first longitudinal bars and the first transverse bars are connected to the bottom of the stirrups, integrally forming a plurality of "field"-shaped first steel bar meshes; ultra-high performance concrete is cast on the first steel bar meshes, wherein, a plurality of "field"-shaped rib parts are formed, and a slab part connected to the rib parts, and the upper parts of the stirrups protrude from the slab part by a certain height; The concrete bridge deck includes a second steel bar mesh and concrete cast on the second steel bar mesh; the steel bar mesh includes second longitudinal bars and second transverse bars; wherein some of the second longitudinal bars are longitudinally penetrated and connected to the upper parts of the first stirrups, and some of the second transverse bars are transversely penetrated and connected to the upper parts of the second stirrups.

2. The prefabricated UHPC ribbed plate-concrete composite bridge deck structure according to claim 1, characterized in that: It further includes a steel beam, and stud bolts are fixedly connected to the steel beam; stud bolt holes are reserved on the UHPC ribbed slab.

3. The prefabricated UHPC ribbed plate-concrete composite bridge deck structure according to claim 2 is characterized in that: The steel beam is an I-beam.

4. The prefabricated UHPC ribbed plate-concrete composite bridge deck structure according to claim 1, characterized in that: One of the first longitudinal bars is respectively connected to two bent parts at the inner bottom of the first stirrup; one of the first transverse bars is respectively connected to two bent parts at the inner bottom of the second stirrup.

5. A construction method for a prefabricated UHPC ribbed plate-concrete composite bridge deck structure as claimed in any one of claims 1 to 4, characterized in that: It includes the following construction steps: First, connect the first longitudinal bars, the first transverse bars, the first stirrups and the second stirrups in a prefabrication factory to form a first steel bar mesh; Then, formwork the first steel bar mesh and cast ultra-high performance concrete to form a precast UHPC ribbed slab having the rib parts and the slab part, and the upper parts of the stirrups protruding from the slab part by a certain height; After transporting the precast UHPC ribbed slab to the construction site for installation, longitudinally penetrate and connect the second longitudinal bars to the upper parts of the first stirrups, and transversely penetrate and connect the second transverse bars to the upper parts of the second stirrups to form a second steel bar mesh; Finally, formwork the second steel bar mesh and cast concrete.

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