A combined bridge deck structure and method of construction thereof

Abstract

The present application relates to a kind of combination bridge deck structure and its construction method, it includes: bridge deck slab;Multiple stiffening ribs, multiple the stiffening ribs are spaced apart along the bridge direction, and are all fixed in the bottom of the bridge deck slab along the longitudinal direction;At least one transverse diaphragm, the transverse diaphragm is vertically fixed in the bottom of the bridge deck slab;Ultra-high performance concrete layer, the ultra-high performance concrete layer is arranged on the top of the bridge deck slab, and multiple cavities are formed between the bridge deck slab, each the cavity is along longitudinal direction extends, and is spaced apart at the transverse diaphragm, and the cross section of each the cavity is arch-shaped.The present application is based on arch effect by the cavity formed between ultra-high performance concrete layer and bridge deck slab to transfer upper wheel load to the stiffening rib below bridge deck slab dispersion, reduce the stress of bridge deck slab, improve the stress distribution of bridge deck slab.Further, the present application uses connecting assembly instead of shear nail, and lays finished steel mesh on connecting assembly, simplifies field construction process.

Description

Technical Field

[0001] This invention relates to the field of steel structure bridges, and in particular to a composite bridge deck structure and its construction method. Background Technology

[0002] In recent years, my country has vigorously developed steel structure bridges. Orthotropic steel bridge deck systems are widely used in long-span steel bridges due to their advantages such as lighter component weight, convenient transportation and installation, and fast construction speed. However, the low stiffness and anisotropy of orthotropic steel bridge decks result in two major problems: fatigue cracking of the steel bridge deck and damage to the pavement layer.

[0003] In related technologies, the stress on the top of the bridge deck of a composite bridge structure cannot be effectively distributed, making the bridge deck prone to fatigue cracking. This requires the bridge deck to be designed to be thicker to ensure its load-bearing capacity, resulting in high construction costs and inconvenience for bridge deck transportation and construction. Summary of the Invention

[0004] This invention provides a composite bridge deck structure and its construction method to solve the problems in related technologies, such as the bridge deck of the composite bridge deck structure being prone to fatigue cracking, the need for a thicker bridge deck design leading to high construction costs, and the inconvenience of transportation and construction due to an excessively thick bridge deck design.

[0005] In a first aspect, embodiments of the present invention provide a composite bridge deck structure, comprising: a bridge deck; a plurality of stiffening ribs, the plurality of stiffening ribs being spaced apart along the transverse direction of the bridge and all fixed to the bottom of the bridge deck along the longitudinal direction of the bridge; at least one transverse diaphragm, the transverse diaphragm being vertically fixed to the bottom of the bridge deck and having a groove, the plurality of stiffening ribs being at least partially located within the groove; an ultra-high performance concrete layer, the ultra-high performance concrete layer being disposed on the top of the bridge deck and forming a plurality of cavities between the bridge deck and the bridge deck, each cavity extending along the longitudinal direction of the bridge and being spaced apart at the transverse diaphragm, and each cavity having an arched cross-section; along the transverse direction of the bridge, a force transmission section is formed between two adjacent cavities, the force transmission section being located above the stiffening ribs.

[0006] In some embodiments, the composite bridge deck structure further includes: a connecting component embedded in the ultra-high performance concrete layer and fixed to the top of the bridge deck, and the connecting component is used to transfer the force on the ultra-high performance concrete layer to the multiple stiffening ribs and diaphragms; the highest point of each cavity is not higher than the top surface of the connecting component.

[0007] In some embodiments, the connecting component includes: a plurality of first connecting ribs, the plurality of first connecting ribs being distributed in a rectangular array, the length direction of the plurality of first connecting ribs being consistent with the longitudinal direction of the bridge, and the lower part of the plurality of first connecting ribs spaced apart along the longitudinal direction corresponding to a stiffening rib.

[0008] In some embodiments, the connecting assembly further includes at least one second connecting rib, the length direction of which is consistent with the transverse bridge direction, and the second connecting rib is located between two rows of first connecting ribs arranged parallel to each other along the transverse bridge direction, and directly above the transverse partition.

[0009] In some embodiments, both the first connecting ribs and the second connecting ribs are made of hot-rolled asymmetric spherical flat steel, and each first connecting rib is provided with a plurality of receiving grooves I spaced apart along its own length direction; the second connecting rib is provided with a plurality of receiving grooves II spaced apart along its own length direction.

[0010] In some embodiments, the plurality of first connecting ribs and second connecting ribs are T-shaped; the plurality of first connecting ribs are provided with a plurality of through holes spaced apart along their own length.

[0011] In some embodiments, along the transverse direction of the bridge, an integrally formed sealing plate is fixed between the lower ends of every two stiffening ribs to form a U-shaped structure.

[0012] In some embodiments, the cross-section of the plurality of stiffening ribs is I-shaped or T-shaped.

[0013] Secondly, embodiments of the present invention provide a construction method for a composite bridge deck structure as described above, comprising the following steps:

[0014] Multiple stiffening ribs are fixed at the bottom of the bridge deck, wherein the multiple stiffening ribs are spaced apart along the transverse direction of the bridge, and the length direction of the multiple stiffening ribs is consistent with the longitudinal direction of the bridge.

[0015] Multiple cavity templates are laid on top of the bridge deck, wherein the multiple cavity templates are spaced apart along the transverse direction of the bridge, and the length direction of the multiple cavity templates is consistent with the longitudinal direction of the bridge.

[0016] The ultra-high performance concrete layer is poured on top of the bridge deck;

[0017] After the ultra-high performance concrete layer reaches the set strength requirement, multiple cavity templates are removed to form multiple cavities between the bridge deck and the ultra-high performance concrete layer. Along the transverse direction of the bridge, a force transmission section is formed between two adjacent cavities, and the force transmission section is located above the stiffening rib.

[0018] In some embodiments, it further includes the step of fixing the diaphragm to the bottom of the bridge deck, wherein the diaphragm has a groove and the plurality of stiffening ribs are at least partially located within the groove.

[0019] The beneficial effects of the technical solution provided by this invention include:

[0020] (1) The cavity formed between the ultra-high performance concrete layer and the bridge deck transfers the upper wheel load to the force transmission part on both sides of the arch based on the arch effect, and then to the stiffening rib connected below for dispersion, which reduces the stress on the bridge deck and improves the stress distribution of the bridge deck; at the same time, due to the existence of the cavity, the stiffness of this composite bridge deck structure is better than other composite bridge deck structures with the same concrete volume, and can reduce the stress level of key parts.

[0021] (2) Connecting components are used instead of shear studs to connect the bridge deck and the ultra-high performance concrete layer, eliminating the complicated layout process of multiple shear studs. At the same time, receiving grooves or through holes are opened along the length direction on the connecting components to form a PBL-like connecting component structure to enhance the interface shear strength of the bridge deck and the ultra-high performance concrete layer. The finished steel mesh can be laid on the connecting components, simplifying the on-site construction process, effectively improving construction efficiency, and ensuring convenient transportation and installation of the bridge deck. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A three-dimensional structural schematic diagram of the first type of combined bridge deck structure (U-shaped) provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure without the ultra-high performance concrete layer poured in the middle;

[0025] Figure 3 for Figure 1 A schematic diagram of the front view structure in the diagram;

[0026] Figure 4 A three-dimensional structural schematic diagram of the second type of combined bridge deck structure (I-shape) provided in an embodiment of the present invention;

[0027] Figure 5 A three-dimensional structural schematic diagram of the third type of combined bridge deck structure (T-shaped) provided in an embodiment of the present invention;

[0028] Figure 6 This is a three-dimensional structural diagram of the fourth combined bridge deck structure provided in this embodiment of the invention;

[0029] Figure 7 A three-dimensional structural diagram of the first connecting rib with a receiving groove in an embodiment of the present invention;

[0030] Figure 8 A three-dimensional structural diagram showing the through hole formed in the first connecting rib in an embodiment of the present invention;

[0031] In the figure: 1. Bridge deck; 2. Stiffening rib; 3. Diaphragm; 4. Ultra-high performance concrete layer; 5. Cavity; 6. Force transmission part; 7. Connecting component; 71. First connecting rib; 711. Receiving groove one; 72. Second connecting rib; 721. Receiving groove two; 8. Cavity template. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides a composite bridge deck structure and its construction method to solve the problems in related technologies, such as the bridge deck of the composite bridge deck structure being prone to fatigue cracking, the need for a thicker bridge deck design leading to high construction costs, and the inconvenience of transportation and construction due to an excessively thick bridge deck design.

[0034] See Figure 1As shown, this embodiment of the invention provides a composite bridge deck structure, which may include: a bridge deck 1; a plurality of stiffening ribs 2, which are spaced apart along the transverse direction and fixed to the bottom of the bridge deck 1 along the longitudinal direction, that is, each stiffening rib 2 at the bottom of the bridge deck 1 may extend along the longitudinal direction; at least one transverse diaphragm 3, which is vertically fixed to the bottom of the bridge deck 1 and has a groove, in which the plurality of stiffening ribs 2 are at least partially located; an ultra-high performance concrete layer 4, which is disposed on the top of the bridge deck 1 and forms a plurality of cavities 5 between the bridge deck 1 and the bridge deck 1, each cavity 5 extending along the longitudinal direction and spaced apart at the transverse diaphragm 3, and each cavity 5 having an arched cross-section, wherein the plurality of cavities 5 may be arranged along the transverse direction; along the transverse direction, a force transmission part 6 is formed between two adjacent cavities 5, and the force transmission part 6 is located above the stiffening ribs 2. In this context, the force transmission part 6 is located above the stiffening rib 2. This can be understood as the force transmission part 6 being located directly above the stiffening rib 2 or near the stiffening rib 2 below it. It does not necessarily have to be located directly above the stiffening rib 2 below it. It can still achieve a good force distribution and transmission effect.

[0035] Specifically, the cavity 5 formed between the ultra-high performance concrete layer 4 and the bridge deck 1 transmits the upper wheel load to the force transmission parts 6 on both sides of the arch based on the arch effect. Then, the force transmission parts 6 transmit the load to the stiffening ribs 2 connected below for dispersion, reducing the stress on the bridge deck 1 and improving the stress distribution of the bridge deck 1. While ensuring the structural performance of the bridge deck, the thickness of the bridge deck pavement can be reduced, further reducing the construction cost. At the same time, due to the cavity structure, the stiffness of this composite bridge deck structure is superior to other composite bridge deck structures with the same volume of ultra-high performance concrete, and it can reduce the peak stress of the ultra-high performance concrete layer and improve the fatigue detail stress of the bridge deck and stiffening ribs.

[0036] In some embodiments, such as Figure 1 As shown, the composite bridge deck structure also includes a connecting component 7, which is embedded in the ultra-high performance concrete layer 4 and fixed to the top of the bridge deck 1. The connecting component 7 is used to transfer the force on the ultra-high performance concrete layer 4 to multiple stiffening ribs 2; the highest point of each cavity 5 is not higher than the top surface of the connecting component 7. The connecting component 7 increases the connection and shear resistance between the bridge deck 1 and the ultra-high performance concrete layer 4.

[0037] In some embodiments, such as Figure 1-6As shown, the connecting component 7 includes: a plurality of first connecting ribs 71, which are arranged in a rectangular array. The length direction of the plurality of first connecting ribs 71 is consistent with the longitudinal direction of the bridge. Each of the plurality of first connecting ribs 71, which are spaced apart along the longitudinal direction, corresponds directly below a stiffening rib 2. In this regard, firstly, the plurality of first connecting ribs 71 can provide a good supporting connection between the bridge deck 1 and the ultra-high performance concrete layer 4; secondly, they can distribute and transfer the stress on the ultra-high performance concrete layer 4 to the corresponding stiffening rib 2 below it, which greatly improves the structural performance and strength requirements of the bridge deck 1; furthermore, the plurality of first connecting ribs 71 are arranged at intervals along the longitudinal direction of the bridge, which reduces the amount of material used while increasing the filling of ultra-high performance concrete, ensuring the amount of concrete used and improving the structural strength of the bridge deck.

[0038] In some embodiments, the connecting component 7 further includes at least one second connecting rib 72, the length direction of which is consistent with the transverse direction of the bridge, and the second connecting rib 72 is located between two rows of first connecting ribs 71 arranged parallel to each other in the transverse direction of the bridge, and directly above the transverse diaphragm 3. The second connecting rib 72 can further improve the supporting connection between the bridge deck 1 and the ultra-high performance concrete layer 4, and can also distribute the stress on the ultra-high performance concrete layer 4 to the corresponding transverse diaphragm 3 below, thereby reducing the concentrated stress on the stiffening rib 2, increasing the force transmission path, and further optimizing the performance of the bridge deck structure.

[0039] In some embodiments, such as Figure 1-5 As shown, multiple first connecting ribs 71 and second connecting ribs 72 are made of hot-rolled asymmetric spherical flat steel. Each first connecting rib 71 is provided with multiple receiving grooves 711 spaced apart along its own length; the second connecting rib 72 is provided with multiple receiving grooves 721 spaced apart along its own length. The receiving grooves 711 facilitate the installation of transverse reinforcing bars, and the receiving grooves 721 facilitate the installation of longitudinal reinforcing bars, thereby completing the laying of a single-layer reinforcing mesh of the ultra-high performance concrete layer 4. There is no need to set up a separate auxiliary device to lay the single-layer reinforcing mesh, which simplifies the binding and padding process of the reinforcing mesh and greatly improves the practicality of the connecting component 7. Furthermore, the receiving grooves and the longitudinal and transverse reinforcing bars can form a PBL-like connecting component structure, further enhancing the shear resistance of the interface. Its structure is simple and reasonably designed. On the one hand, it optimizes the force transmission and improves the service life of the bridge deck 1. On the other hand, it also facilitates the laying of the single-layer reinforcing mesh of the ultra-high performance concrete layer 4. The formed PBL-like connecting component structure ensures the shear resistance of the interface between the bridge deck 1 and the ultra-high performance concrete layer 4.

[0040] In some embodiments, such as Figure 6 and 8As shown, multiple first connecting ribs 71 and second connecting ribs 72 are T-shaped; multiple first connecting ribs 71 are provided with multiple through holes spaced apart along their length. In some embodiments, additional reinforcing bars can be installed in the through holes of the first connecting ribs 71 to form a PBL-like connector structure, which can enhance the shear resistance of the bridge deck 1 and the ultra-high performance concrete layer 4.

[0041] In some embodiments, longitudinal and transverse steel bars can be pre-fixed using steel wire binding or spot welding to form a single-layer steel mesh, which can then be directly laid on multiple connecting components 7 on site, simplifying the construction process and improving construction efficiency.

[0042] Specifically, compared to shear stud connectors in most composite bridge deck structures, the connecting component 7 eliminates the complicated layout process of multiple shear studs and simplifies the binding and padding process of the steel mesh, greatly accelerating the construction process and improving construction efficiency. At the same time, the connecting component 7 has a receiving groove or through hole along its length to form a PBL-like structure with the steel reinforcement, ensuring the interfacial shear strength between the bridge deck 1 and the ultra-high performance concrete layer 4.

[0043] Specifically, compared to using T-ribs for connecting ribs, using hot-rolled asymmetric spherical flat steel for connecting ribs provides greater stiffness and better ensures the shear bearing capacity of the composite bridge deck structure.

[0044] In some embodiments, such as Figure 1 As shown, along the transverse direction of the bridge, an integrally formed sealing plate is fixed between the lower ends of every two stiffening ribs 2 to form a U-shaped structure. The U-shaped structure between every two stiffening ribs 2 facilitates docking and installation with the top of the steel box girder, and also ensures stable structural performance and strong load-bearing capacity.

[0045] In some embodiments, such as Figure 4 As shown, the cross-section of the multiple stiffening ribs 2 is I-shaped. Of course, in some optional embodiments, such as... Figure 5 As shown, multiple stiffening ribs 2 can also be T-shaped; on the one hand, this simplifies the structural design of the stiffening rib 2 and reduces its cost; on the other hand, it also ensures the structural strength of the stiffening rib 2.

[0046] In summary, such as Figure 1 , 2 As shown in Figures 1 and 3, this embodiment of the invention provides a first type of combined bridge deck structure; as... Figure 4 As shown, this embodiment of the invention provides a second type of combined bridge deck structure; as Figure 5 As shown, this embodiment of the invention provides a third type of combined bridge deck structure; as Figure 6 As shown, this embodiment of the invention provides a fourth type of combined bridge deck structure.

[0047] In some embodiments, the present invention also provides a construction method for the composite bridge deck structure mentioned in the above embodiments, which includes the following steps:

[0048] Step 1: Fix multiple stiffening ribs 2 at the bottom of the bridge deck 1. The multiple stiffening ribs 2 are spaced apart along the transverse direction of the bridge, and the length direction of the multiple stiffening ribs 2 is consistent with the longitudinal direction of the bridge.

[0049] Step 2: Fix the transverse diaphragm 3 at the bottom of the bridge deck 1. The transverse diaphragm 3 has a groove, and multiple stiffening ribs 2 are at least partially located in the groove.

[0050] Step 3: Lay multiple cavity templates 8 on the top of the bridge deck 1. The multiple cavity templates 8 are spaced apart along the transverse direction of the bridge, and the length direction of the multiple cavity templates 8 is consistent with the longitudinal direction of the bridge.

[0051] Step 4: Pour an ultra-high performance concrete layer 4 on top of bridge deck 1;

[0052] Step 5: After the ultra-high performance concrete layer 4 reaches the set strength requirements, remove multiple cavity templates 8 to form multiple cavities 5 between the bridge deck 1 and the ultra-high performance concrete layer 4. Along the transverse direction of the bridge, a force transmission part 6 is formed between two adjacent cavities 5, and the force transmission part 6 is located above the stiffening rib 2.

[0053] In some embodiments, prior to step four, a plurality of first connecting ribs 71 and at least one second connecting rib 72 are fixed on the top of the bridge deck 1. The plurality of first connecting ribs 71 are arranged in a rectangular array, and the length direction of the plurality of first connecting ribs 71 is consistent with the longitudinal direction of the bridge. The lower part of the plurality of first connecting ribs 71 arranged at intervals along the longitudinal direction corresponds to a stiffening rib 2. The second connecting rib 72 is located between two rows of first connecting ribs 71 arranged parallel to each other along the transverse direction of the bridge and is located directly above the transverse diaphragm 3.

[0054] The first connecting rib 71 and the second connecting rib 72 can be configured in two structural forms. The first form uses hot-rolled asymmetric spherical flat steel. The first connecting rib 71 has multiple receiving slots 711 spaced apart along its length, and the second connecting rib 72 has multiple receiving slots 721 spaced apart along its length. The receiving slots 711 facilitate the installation of transverse reinforcing bars, and the receiving slots 721 facilitate the installation of longitudinal reinforcing bars, thereby completing the laying of the single-layer steel mesh of the ultra-high performance concrete layer 4. The second form uses T-shaped connecting ribs. The first connecting rib 71 has multiple through holes spaced apart along its length. After the ultra-high performance concrete layer 4 is poured, the through holes will form concrete tenons, or reinforcing bars will be placed in the through holes to form a PBL-like connector structure to enhance the interface shear strength between the bridge deck 1 and the ultra-high performance concrete layer 4. At the same time, the transverse reinforcing bars are placed on the first connecting rib 71, and the longitudinal reinforcing bars are placed on the second connecting rib 72 and simply fixed, thus completing the laying of the single-layer steel mesh of the ultra-high performance concrete layer 4.

[0055] Specifically, the cross-sectional areas of the first connecting rib 71 and the second connecting rib 72 are based on the "Steel Structure Design Standard" (GB50017-2017) and "Hot-rolled Ball Flat Steel" (GB / T 9945-2001). The length of the first connecting rib 71 along the longitudinal direction of the bridge is between 400 and 800 mm, and it is arranged at longitudinal intervals of 100 to 400 mm. The length of the second connecting rib 72 along the transverse direction of the bridge is slightly less than the width of the bridge deck 1. The thickness of the first connecting rib 71 should be similar to that of the lower stiffening rib 2 of the bridge deck 1, and the thickness of the second connecting rib 72 should be similar to that of the lower transverse diaphragm 3 of the bridge deck 1. The difference should be within 2 mm.

[0056] In some embodiments, before step two, that is, before installing the arched cavity template 8 on the bridge deck 1, the surface of the bridge deck 1 is milled or the original pavement layer is removed, and shot blasting is performed to remove rust, so that the surface finish of the bridge deck 1 reaches Sa2.5 level.

[0057] In some embodiments, in step two, the height of the arched cavity template 8 should be less than the height of the single-layer steel mesh in the ultra-high performance concrete layer 4, and a certain thickness of steel reinforcement protective layer should be reserved. The height of the arched cavity template 8 should be between 20 and 40 mm, and the width should be less than the distance between two adjacent longitudinal stiffening ribs 2 below the bridge deck 1.

[0058] Specifically, the arched cavity template 8 is positioned before being installed on the bridge deck 1 to ensure that it is in the middle of the two adjacent longitudinal stiffening ribs 2.

[0059] Specifically, the cavity 5 can be formed by pre-embedding a cavity template 8. The cavity template 8 includes two types: a cavity template and a foam core mold. The cavity template is formed by stamping a thin metal plate, and the foam core mold is formed by injection molding of polyurethane foam material.

[0060] Furthermore, the thickness of the arched cavity template 8 should be sufficient to withstand the weight of the ultra-high performance concrete layer 4.

[0061] In some embodiments, in step four, ultra-high performance concrete is used as the pavement on the bridge deck 1, and a single layer of steel mesh is set, which not only ensures the stress performance of the composite bridge deck structure, but also reduces the thickness of the bridge deck pavement.

[0062] The spacing between two adjacent transverse reinforcing bars is 50–150 mm, and the spacing between two adjacent longitudinal reinforcing bars is 50–150 mm, with a diameter of 8–12 mm. Only one layer of reinforcing mesh in the concrete layer is needed to meet the design requirements, and the structure is simple and the laying efficiency is high.

[0063] During the pouring of ultra-high performance concrete, vibration and leveling operations are also carried out to ensure that the ultra-high performance concrete layer is dense and free of pores. The surface is then promptly smoothed, covered with a curing film, and kept moist for maintenance.

[0064] More specifically, in order to ensure that the quality of ultra-high performance concrete in the bridge deck structure meets the requirements of structural stress performance, ultra-high performance concrete with an extension of more than 600mm, a compressive strength of more than 100MPa, a flexural strength of more than 20MPa, and the characteristic of not requiring steam curing is adopted.

[0065] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0066] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A composite bridge deck structure, characterized in that, It includes: Bridge deck (1); Multiple stiffening ribs (2) are spaced apart along the transverse direction of the bridge and are all fixed to the bottom of the bridge deck (1) along the longitudinal direction of the bridge. At least one diaphragm (3) is vertically fixed to the bottom of the bridge deck (1), and the diaphragm (3) has a groove, and a plurality of stiffening ribs (2) are at least partially located in the groove; Ultra-high performance concrete layer (4), the ultra-high performance concrete layer (4) is disposed on the top of the bridge deck (1) and forms multiple cavities (5) between it and the bridge deck (1). Each cavity (5) extends along the longitudinal direction of the bridge and is spaced apart at the transverse diaphragm (3). The cross section of each cavity (5) is arched. Along the transverse direction, a force transmission section (6) is formed between two adjacent cavities (5), and the force transmission section (6) is located above the stiffening rib (2); The composite bridge deck structure also includes: The connecting component (7) is embedded in the ultra-high performance concrete layer (4) and fixed to the top of the bridge deck (1), and the connecting component (7) is used to transfer the force on the ultra-high performance concrete layer (4) to the multiple stiffening ribs (2). The highest point of each cavity (5) is not higher than the top surface of the connecting assembly (7); The connection component (7) includes: Multiple first connecting ribs (71) are arranged in a rectangular array. The length direction of the multiple first connecting ribs (71) is consistent with the longitudinal direction of the bridge. The bottom of the multiple first connecting ribs (71) arranged at intervals along the longitudinal direction is respectively opposite to one of the stiffening ribs (2). The connection component (7) further includes: At least one second connecting rib (72) has a length direction consistent with the transverse direction of the bridge, and the second connecting rib (72) is located between two rows of first connecting ribs (71) arranged parallel to each other in the transverse direction of the bridge, and is located directly above the transverse diaphragm (3); The first connecting rib (71) and the second connecting rib (72) are all made of hot-rolled asymmetric spherical flat steel, and each first connecting rib (71) is provided with a plurality of receiving grooves (711) spaced apart along its own length direction. The second connecting rib (72) is provided with multiple receiving slots (721) spaced apart along its own length direction; The cross-section of the multiple stiffening ribs (2) is I or T-shaped.

2. The composite bridge deck structure as described in claim 1, characterized in that: The first connecting rib (71) and the second connecting rib (72) are all arranged in a T-shape; Each of the first connecting ribs (71) has a plurality of through holes spaced apart along its own length.

3. The composite bridge deck structure as described in claim 1, characterized in that: Along the transverse direction of the bridge, an integrally formed sealing plate is fixed between the lower ends of every two stiffening ribs (2) to form a U-shaped structure.

4. A construction method for a composite bridge deck structure as described in any one of claims 1-3, characterized in that, It includes the following steps: Multiple stiffening ribs (2) are fixed at the bottom of the bridge deck (1), wherein the multiple stiffening ribs (2) are spaced apart along the transverse direction of the bridge, and the length direction of the multiple stiffening ribs (2) is consistent with the longitudinal direction of the bridge. Multiple cavity templates (8) are laid on the top of the bridge deck (1), wherein the multiple cavity templates (8) are spaced apart along the transverse direction of the bridge, and the length direction of the multiple cavity templates (8) is consistent with the longitudinal direction of the bridge. The ultra-high performance concrete layer (4) is poured on top of the bridge deck (1); After the ultra-high performance concrete layer (4) reaches the set strength requirement, a number of cavity templates (8) are taken out, so that a number of cavities (5) are formed between the bridge deck (1) and the ultra-high performance concrete layer (4). In the transverse direction of the bridge, a force transmission part (6) is formed between two adjacent cavities (5), and the force transmission part (6) is located above the stiffening rib (2).

5. The construction method of the composite bridge deck structure as described in claim 4, characterized in that, It also includes the following steps: The diaphragm (3) is fixed at the bottom of the bridge deck (1), wherein the diaphragm (3) has a groove, and a plurality of stiffening ribs (2) are at least partially located in the groove.

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