An assembled corrugated steel web composite beam bridge deck structure and construction method

Abstract

The application discloses an assembled corrugated steel web composite beam bridge deck structure and a construction method, the bridge deck structure comprising a box girder body; an open steel plate welded on the flange plate of the box girder body, the open steel plate being provided with multiple U-shaped notches at equal intervals; a bridge deck assembly comprising a first bridge deck and two second bridge decks, a cast-in-place groove being left between the first bridge deck and the second bridge decks, the cast-in-place groove being arranged on the top of the flange plate, transverse steel bars penetrating through the U-shaped notches and connecting the first bridge deck and the second bridge decks; and a concrete layer cast in the cast-in-place groove for consolidation. The open steel plate welded on the flange plate bears the shearing force, and has higher shearing stiffness and ductility compared with a traditional shearing key. When the bridge deck is hoisted for installation, the transverse steel bars can correspond to the U-shaped notches on the open steel plate, and compared with a traditional hole shaft connection, the assembly is simpler and easier to align, and the installation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge engineering, and relates to a kind of assembled wave-shaped steel web composite beam bridge deck structure and construction method. BACKGROUND

[0002] With the continuous development of economy and technology, bridge construction technology is also constantly improving, and segmental precast assembly construction technology is widely used in bridge engineering construction. Segmental precast assembly technology needs to connect the precast slab to the main beam structure after the precast slab is divided into blocks to form a concrete bridge deck. The precast slab can be produced in a factory without the need for on-site pouring, saving construction time. Moreover, the connected concrete bridge deck generally has a shear groove, which cooperates with the pre-set shear key of the main beam structure to bear horizontal shear force, allowing the concrete bridge deck to bear load together with the main beam structure.

[0003] Since the shear groove and the shear key are critical and weak points, their performance affects not only the construction speed of the precast bridge deck but also the performance of the precast bridge deck during operation. For the connection method of the concrete bridge deck and the main beam structure, the common connection method between the steel-concrete composite structure bridge deck and the steel beam mainly includes hole opening steel plate connection and bolt connection. Since the bolt connection construction is relatively complex, it is mainly used for post-stacking failure reinforcement of composite beams and is only used in a small number of bridges. If the traditional hole opening steel plate connector is used, the bridge deck must be cast on site, which cannot achieve rapid assembly.

[0004] Currently, most of the assembly type construction uses the method of pre-reserved shear grooves between precast bridge decks and cluster type bolt connectors provided on the steel main beam. However, this connection method mainly has the following problems: first, in terms of construction, the bridge deck has a small reserved slot space, which needs to be accurately positioned during hoisting and installation, making the construction difficult and the construction quality cannot be guaranteed, and cracks are easy to occur; second, in terms of stress, the stress performance of the bridge deck shear groove is greatly affected by the longitudinal distance, which easily leads to uneven stress on the bolt; third, in terms of economy, cracks are easy to occur in the bridge deck pavement due to the generation of cracks, which not only affects the driving comfort but also increases the maintenance cost in the later period. SUMMARY

[0005] The present application aims to at least solve one of the technical problems in the prior art, and provides an assembled wave-shaped steel web composite beam bridge deck structure and construction method, which can reduce the assembly difficulty of the bridge deck, improve the installation efficiency, and make the shear distribution more uniform.

[0006] According to the first aspect of the present application, an assembled wave-shaped steel web composite beam bridge deck structure is provided, comprising:

[0007] The box girder body comprises a bottom plate, two corrugated steel webs and two flange plates, the flange plates are connected to the top of the corrugated steel webs one by one, and the two corrugated steel webs and the bottom plate are welded to form a "C" shape structure;

[0008] An open steel plate is welded on the flange plate and extends along the shape direction of the flange plate, a plurality of U-shaped notches are equidistantly arranged along the shape direction of the open steel plate, and the openings of the U-shaped notches face upward.

[0009] The bridge deck assembly comprises a first bridge deck and two second bridge decks, the two second bridge decks are symmetrically arranged on the two sides of the first bridge deck respectively, a cast-in-place groove is left between the first bridge deck and the second bridge deck, the width of the cast-in-place groove is smaller than the width of the flange plate, the cast-in-place groove is arranged on the top of the flange plate, the first bridge deck is connected with the two second bridge decks through a plurality of transverse steel bars, and the transverse steel bars pass through the U-shaped notches.

[0010] A concrete layer is poured in the cast-in-place groove for consolidation.

[0011] According to the first aspect of the present application, further, two transverse steel bars pass through each U-shaped notch, and the two transverse steel bars are distributed along the vertical direction.

[0012] According to the first aspect of the present application, further, the fabricated corrugated steel web composite girder bridge deck structure further comprises a transverse steel plate and a plurality of longitudinal steel bars, the transverse steel plate is arranged horizontally in the cast-in-place groove, the open steel plate is broken at the transverse steel plate, a plurality of holes are arranged on the transverse steel plate for the longitudinal steel bars to pass through, and the longitudinal steel bars and the transverse steel bars are welded to each other.

[0013] According to the first aspect of the present application, further, the number of the bridge deck assemblies is at least two, the bridge deck assemblies are provided with ring-shaped steel bars on the end faces in the longitudinal bridge direction, the ring-shaped steel bars on the adjacent two bridge deck assemblies are staggered and welded to each other, and a wet joint is left between the adjacent two bridge deck assemblies for pouring the concrete layer.

[0014] According to the first aspect of the present application, further, the fabricated corrugated steel web composite girder bridge deck structure further comprises a closed steel bar, the closed steel bar is in a closed ring shape and is welded to the ring-shaped steel bars on the adjacent two bridge deck assemblies.

[0015] According to the first aspect of the present application, further, the transverse steel bars pass through the wet joint and are welded to the ring-shaped steel bars and the closed steel bar to form an integral whole.

[0016] According to the second aspect of the present application, a prefabricated corrugated steel web composite beam bridge deck slab construction method is provided, comprising:

[0017] The box girder body is manufactured and welded in the factory, the manufacturing of the steel bottom plate unit, the transverse diaphragm unit, the web unit and other unit elements is completed in the box girder body, and then the welding assembly of each segment is performed;

[0018] The box girder body is transported to the construction site, and the erection of the box girder body is performed by hoisting, pushing or pulling;

[0019] The bridge deck slab assembly is manufactured in the factory, the transverse steel bars are penetrated through the first bridge deck slab and the second bridge deck slab, and a cast-in-place groove is left between the first bridge deck slab and the second bridge deck slab;

[0020] The opening steel plate is welded on the flange plate, the manufactured bridge deck slab assembly is hoisted to the box girder body, the position of the cast-in-place groove corresponds to the position of the flange plate, and the transverse steel bars are penetrated through the U-shaped notch;

[0021] The concrete is poured in the cast-in-place groove and the opening steel plate and the transverse steel bars are submerged, the concrete layer is generated after curing, and the first bridge deck slab and the second bridge deck slab are bonded.

[0022] According to the second aspect of the present application, further, the number of the bridge deck slab assemblies is at least two, the end surface of the bridge deck slab assembly in the longitudinal bridge direction is provided with a ring-shaped steel bar, the ring-shaped steel bars on the adjacent two bridge deck slab assemblies are staggered and welded with each other, and a wet joint is left between the adjacent two bridge deck slab assemblies for pouring the concrete layer; the ring-shaped steel bars are welded with each other before pouring.

[0023] According to the second aspect of the present application, further, the ring-shaped steel bars on the adjacent two bridge deck slab assemblies are welded with each other through a closed steel bar.

[0024] According to the second aspect of the present application, further, after the completion of the concrete pouring and curing, a guardrail or a crash barrier is installed, and the paving construction of the bridge deck slab assembly is performed.

[0025] The beneficial effects of the embodiment of the present application at least include that the opening steel plate welded on the flange plate bears the shear force, and has higher shear stiffness and ductility compared with the traditional shear key; and when the bridge deck slab is hoisted for installation, the transverse steel bar corresponds to the U-shaped notch on the opening steel plate, which is simpler and easier to align compared with the traditional hole shaft connection, and the installation efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly describe the drawings needed in the embodiment description. Obviously, the described drawings are only a part of the embodiments of the present application, not all the embodiments, and the person skilled in the art can also obtain other design schemes and drawings from these drawings without creative labor.

[0027] Figure 1 is a three-dimensional view of the bridge deck structure of the fabricated corrugated steel web composite beam bridge according to the first aspect of the present application;

[0028] Figure 2 is a three-dimensional view of the bridge deck assembly in the bridge deck structure of the fabricated corrugated steel web composite beam bridge according to the first aspect of the present application;

[0029] Figure 3 is a local enlarged view of the cast-in-place groove in the bridge deck structure of the fabricated corrugated steel web composite beam bridge according to the first aspect of the present application;

[0030] Figure 4 is a schematic view of the direct welding of the ring-shaped steel bars in the bridge deck structure of the fabricated corrugated steel web composite beam bridge according to the first aspect of the present application;

[0031] Figure 5 is a schematic view of the welding of the ring-shaped steel bars through the closure steel bars in the bridge deck structure of the fabricated corrugated steel web composite beam bridge according to the first aspect of the present application.

[0032] Reference signs: 100 - box girder body, 110 - bottom plate, 120 - corrugated steel web, 130 - flange plate, 200 - open steel plate, 210 - U-shaped socket, 300 - bridge deck assembly, 310 - first bridge deck, 320 - second bridge deck, 330 - cast-in-place groove, 400 - transverse steel bar, 500 - transverse steel plate, 600 - longitudinal steel bar, 700 - ring-shaped steel bar, 800 - wet joint, 900 - closure steel bar. DETAILED DESCRIPTION

[0033] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with figures, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0034] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0035] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described that the first, second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0036] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0037] The first aspect embodiment of the present application provides a prefabricated corrugated steel web composite beam bridge deck structure, which welds an open steel plate 200 on the flange plate 130, and corresponds one-to-one the transverse steel bars 400 on the bridge deck assembly 300 with the U-shaped clamping holes 210 on the open steel plate 200, and is consolidated into a whole after pouring concrete. The transverse steel bars 400 not only improve the shear stiffness and ductility of the open steel plate 200 connector, but also better align the transverse steel bars 400 with the U-shaped clamping holes 210, and compared with the traditional hole shaft connection, the assembly precision requirement is lower, so as to improve the assembly efficiency and reduce the working hours consumed by assembly.

[0038] The second aspect embodiment of the present application provides a prefabricated corrugated steel web composite beam bridge deck construction method, based on the prefabricated corrugated steel web composite beam bridge deck structure described above, mainly describes the construction process of the prefabricated corrugated steel web composite beam bridge deck structure.

[0039] Referring to Figure 1 The prefabricated corrugated steel web composite beam bridge deck structure in the first aspect embodiment of the present application comprises a box girder body 100, an open steel plate 200, a bridge deck assembly 300 and a concrete layer. The box girder body 100 is the main structure of the bridge, which specifically comprises a bottom plate 110, a corrugated steel web 120 and a flange plate 130. The number of the corrugated steel web 120 and the flange plate 130 is two and is set one-to-one, and the flange plate 130 is connected to the top of the corrugated steel web 120. The bottom of the two corrugated steel webs 120 is welded with the bottom plate 110 and forms a "C" shaped structure, and the center of the "C" shaped structure is used for pouring concrete to strengthen the box girder structure.

[0040] Referring to Figure 3 and Figure 4The open steel plate 200 is arranged in one-to-one correspondence with the flange plate 130, welded on the flange plate 130 and extends along the shape direction of the flange plate 130. The open steel plate 200 is provided with a plurality of U-shaped notches 210 with openings upward along the shape direction thereof.

[0041] With reference to Figure 2 The bridge deck assembly 300 is installed on the top of the box girder body 100. The bridge deck assembly 300 comprises a first bridge deck 310 and two second bridge decks 320, which are symmetrically arranged on both sides of the first bridge deck 310 and are spliced together as a whole. A cast-in-place groove 330 is left between the first bridge deck 310 and the second bridge decks 320, which has a width smaller than that of the flange plate 130 and is arranged on the top of the flange plate 130 in correspondence. The first bridge deck 310 is connected with the two second bridge decks 320 through a plurality of transverse steel bars 400 and transverse steel plates 500, and the transverse steel bars 400 correspond to the U-shaped notches 210 and pass through the U-shaped notches 210. In some embodiments, two or more transverse steel bars 400 can pass through the same U-shaped notch 210 to enhance the connection strength, and the transverse steel bars 400 are distributed along the vertical direction. After installation, concrete is poured in the cast-in-place groove 330, and the open steel plate 200 and the transverse steel bars 400 in the cast-in-place groove 330 are fixed together through the concrete layer, thereby completing the connection of the first bridge deck 310 and the second bridge decks 320.

[0042] Further, the assembled wave-shaped steel web composite girder bridge deck structure further comprises transverse steel plates 500 and a plurality of longitudinal steel bars 600. The transverse steel plates 500 are arranged horizontally in the cast-in-place groove 330, and the transverse steel plates 500 are provided with a plurality of holes for the longitudinal steel bars 600 to pass through. The longitudinal steel bars 600 are arranged along the shape direction of the cast-in-place groove 330 and are welded together with the transverse steel bars 400 to form a frame structure, so that the connection strength of the overall structure is higher.

[0043] Further, with reference to Figure 4 The number of the bridge deck assemblies 300 is at least two, and the bridge deck assemblies 300 are provided with ring-shaped steel bars 700 on the end faces in the longitudinal bridge direction and are exposed outward. The ring-shaped steel bars 700 on the adjacent two bridge deck assemblies 300 are staggered and welded with each other, thereby realizing the mutual connection of the two bridge deck assemblies 300 in the longitudinal bridge direction. A wet joint 800 is left between the adjacent two bridge deck assemblies for pouring a concrete layer. After pouring, the concrete solidifies the ring-shaped steel bars 700 in the wet joint 800, thereby realizing the connection of the adjacent two bridge deck assemblies 300.

[0044] Further, in some embodiments, with reference to Figure 5The bridge deck structure of the fabricated corrugated steel web composite beam bridge further comprises a closed reinforcement 900 which is a closed loop, and the annular reinforcements 700 on the two adjacent bridge deck components 300 are welded to each other through the closed reinforcement 900, which is suitable for the case that the wet joint 800 is relatively wide and needs to be indirectly connected through the closed reinforcement 900. In order to improve the overall connection strength, the transverse reinforcement 400 penetrates the wet joint 800 and is welded to the annular reinforcement 700 and the closed reinforcement 900 as a whole.

[0045] The bridge deck construction method of the fabricated corrugated steel web composite beam bridge in the second aspect of the present application is based on the bridge deck structure of the fabricated corrugated steel web composite beam bridge described above, and comprises the following construction steps:

[0046] S100. Fabricate and weld the box girder body 100 in the factory, complete the fabrication of unit elements such as steel bottom plate units, transverse diaphragm units and web units in the box girder body 100, and then perform welding assembly of each segment.

[0047] S200. Transport the box girder body 100 to the construction site, and use hoisting, jacking or dragging methods to erect the box girder body 100.

[0048] S300. Fabricate the bridge deck component 300 in the factory, use the transverse reinforcement 400 to penetrate the first bridge deck 310 and the second bridge deck 320, and leave a cast-in-place groove 330 between the first bridge deck 310 and the second bridge deck 320.

[0049] S400. Weld the open steel plate 200 on the flange plate 130, make the open steel plate 200 extend along the flange plate 130, hoist the fabricated bridge deck component 300 to the box girder body 100, so that the position of the cast-in-place groove 330 corresponds to the position of the flange plate 130, and the transverse reinforcement 400 corresponds to the U-shaped socket 210 one by one and penetrates the U-shaped socket 210.

[0050] S500. Pour concrete into the cast-in-place groove 330 and immerse the open steel plate 200 and the transverse reinforcement 400, and after curing, generate a concrete layer and bond the first bridge deck 310 and the second bridge deck 320.

[0051] Further, for the case that the number of bridge deck components 300 is two or more, the two adjacent bridge deck components 300 are directly welded through the annular reinforcement 700, or the annular reinforcement 700 is indirectly welded through the closed reinforcement 900, and then the annular reinforcement 700 and the closed reinforcement 900 are poured and immersed in the wet joint 800, to realize the connection of the two adjacent bridge deck components 300.

[0052] Further, after completing the concrete pouring of all areas of the box girder body 100, the guardrails or crash barriers are installed, and the paving construction of the bridge deck component 300 is performed.

[0053] The above describes the preferred embodiments of the present application, but the present application is not limited to the above-described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A method for constructing a bridge deck of a fabricated corrugated steel web composite girder bridge, comprising a bridge deck structure of a fabricated corrugated steel web composite girder bridge, characterized in that, The prefabricated corrugated steel web composite beam bridge deck plate structure comprises: a box girder body comprising a bottom plate, corrugated steel webs and flange plates, the number of the corrugated steel webs and the flange plates is two, the flange plates are connected to the top of the corrugated steel webs one by one, and the two corrugated steel webs and the bottom plate are welded to form a "C" structure; an open steel plate welded on the flange plate and extending along the body direction of the flange plate, the open steel plate is provided with a plurality of U-shaped notches equidistantly along the body direction, and the openings of the U-shaped notches face upward; a deck plate assembly comprising a first deck plate and two second deck plates, the two second deck plates are symmetrically arranged on the two sides of the first deck plate, a cast-in-place slot is left between the first deck plate and the second deck plate, the width of the cast-in-place slot is smaller than the width of the flange plate, the cast-in-place slot is arranged on the top of the flange plate, the first deck plate is connected with the two second deck plates through a plurality of transverse steel bars, and the transverse steel bars pass through the U-shaped notches; a concrete layer poured in the cast-in-place slot for consolidation; a transverse steel plate horizontally arranged in the cast-in-place slot, the open steel plate is broken at the transverse steel plate, a plurality of holes are arranged on the transverse steel plate for the longitudinal steel bars to pass through, and the longitudinal steel bars are welded with the transverse steel bars; The prefabricated corrugated steel web composite beam bridge deck plate construction method comprises: manufacturing and welding the box girder body in the factory, completing the manufacturing of steel bottom plate units, transverse web plate units and web units in the box girder body, and then welding and assembling each segment; transporting the box girder body to the construction site and erecting the box girder body by hoisting, pushing or pulling; manufacturing the deck plate assembly in the factory, penetrating the transverse steel bars through the first deck plate and the second deck plate, and leaving a cast-in-place slot between the first deck plate and the second deck plate; welding the open steel plate on the flange plate, hoisting the manufactured deck plate assembly to the box girder body, the position of the cast-in-place slot corresponds to the position of the flange plate, and the transverse steel bars pass through the U-shaped notches; pouring concrete in the cast-in-place slot to submerge the open steel plate and the transverse steel bars, generating the concrete layer and bonding the first deck plate and the second deck plate.

2. The method for constructing the bridge deck of a prefabricated corrugated steel web composite beam bridge according to claim 1, characterized in that: After completing the concrete pouring and curing, installing guardrails or crash barriers and performing the paving construction of the deck plate assembly.

3. The method for constructing the bridge deck of a prefabricated corrugated steel web composite beam bridge according to claim 1, characterized in that: Two transverse steel bars pass through each U-shaped notch, and the two transverse steel bars are distributed in the vertical direction.

4. The method for constructing the bridge deck of a prefabricated corrugated steel web composite beam bridge according to claim 1, characterized in that: The number of the deck plate assembly is at least two, the deck plate assembly is provided with a ring-shaped steel bar at the end face in the longitudinal bridge direction, the ring-shaped steel bars on the adjacent two deck plate assemblies are staggered and welded with each other, and a wet joint is left between the adjacent two deck plate assemblies for pouring the concrete layer.

5. The method for constructing the bridge deck of a prefabricated corrugated steel web composite beam bridge according to claim 4, characterized in that: The prefabricated corrugated steel web composite beam bridge deck plate structure further comprises a closed steel bar, the closed steel bar is in the form of a closed ring and is welded with the ring-shaped steel bars on the adjacent two deck plate assemblies.

6. The method for constructing the bridge deck of a prefabricated corrugated steel web composite beam bridge according to claim 5, characterized in that: The transverse steel bars penetrate the wet joint and are integrally welded with the ring-shaped steel bars and the closed steel bars.

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