Prefabricated UHPC-profile steel combined bridge deck structure suitable for trestle

Abstract

The utility model provides a prefabricated assembly type UHPC-profile steel combined bridge deck structure suitable for a trestle. The prefabricated assembly type UHPC-profile steel combined bridge deck structure comprises a reinforced concrete prefabricated slab, a first connecting part and a second connecting part. The number of the reinforced concrete prefabricated slabs is multiple, and the multiple reinforced concrete prefabricated slabs are flatly laid on a longitudinal beam of a trestle bailey beam. The first connecting part is arranged between the reinforced concrete precast slab and the longitudinal beam and is used for detachably connecting the reinforced concrete precast slab to the longitudinal beam; and the second connecting part is arranged between the two adjacent reinforced concrete prefabricated slabs and is used for mutually splicing the two adjacent reinforced concrete prefabricated slabs. The bridge deck structure is convenient and fast to construct, high in strength and toughness, good in driving comfort and good in durability.

Description

Technical Field

[0001] The utility model relates to the technical field of trestle bridges, and in particular to a prefabricated assembled UHPC-steel composite bridge deck structure suitable for trestle bridges. Background Art

[0002] Currently, most trestle bridge construction utilizes a steel structure consisting, from bottom to top, of steel pipe piles, steel crossbeams at the top of the piles, Bailey longitudinal beams, and distributed steel bridge decks. Construction sites are often operated by heavy transport vehicles and cranes. Under long-term loads, traditional steel bridge decks are prone to damage such as excessive deformation, fatigue cracking, and corrosion. The installation of steel bridge decks also requires layer-by-layer welding, which is difficult to guarantee weld quality and reduces construction efficiency. Utility Model Content

[0003] The technical problem to be solved by the present invention is that traditional steel bridge decks of trestle bridges are prone to damage such as excessive deformation, fatigue cracking, and corrosion. In order to overcome the above defects of the existing technology, the present invention provides a prefabricated and assembled UHPC-steel composite bridge deck structure suitable for trestle bridges.

[0004] The utility model provides a prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle, comprising a reinforced concrete precast plate, a first connecting portion and a second connecting portion; the reinforced concrete precast plates are provided in a plurality, and the plurality of reinforced concrete precast plates are flatly laid on the longitudinal beams of the Bailey beams of the trestle; the first connecting portion is provided between the reinforced concrete precast plates and the longitudinal beams, and is used for detachably connecting the reinforced concrete precast plates to the longitudinal beams; the second connecting portion is provided between two adjacent reinforced concrete precast plates, and is used for mutually splicing the two adjacent reinforced concrete precast plates.

[0005] Compared with the existing technology, the prefabricated and assembled UHPC-steel composite bridge deck structure suitable for trestle bridges in the present application has the following advantages: a number of reinforced concrete prefabricated panels are laid flat on the trestle bridge to replace the traditional steel bridge deck, thereby reducing the occurrence of damage to the bridge deck such as excessive deformation, cracking, corrosion, etc. At the same time, the first connection part reliably connects the several reinforced concrete prefabricated panels to the longitudinal beam of the Bailey beam of the trestle bridge, and the second connection part splices two adjacent reinforced concrete prefabricated panels to each other. That is, the bridge deck of the present application is prefabricated and processed in blocks in the factory and transported to the site for assembly. The construction is convenient and fast, and the bridge deck has high strength and toughness, good driving comfort, and good durability.

[0006] In a possible embodiment, the first connection portion includes a plurality of first bolt kits, which are distributed at the bottom of the reinforced concrete precast slab. Each of the first bolt kits includes two first bolt members, two first locking nuts, two bolt anchors and a first connecting plate. The two bolt anchors are embedded in the reinforced concrete precast slab at intervals. The two first bolt members pass through the two bolt anchors respectively. The two first bolt members are respectively connected to the two ends of the first connecting plate through the first locking nuts, so as to connect the longitudinal beam between the first connecting plate and the reinforced concrete precast slab.

[0007] Compared with the existing technology, the above technical solution can realize the detachable connection of reinforced concrete prefabricated panels to the longitudinal beams, with a simple structure, stable and reliable connection, and convenient maintenance and repair of the bridge deck.

[0008] In a possible embodiment, the bolt anchor is a hollow sleeve, and the upper aperture of the hollow sleeve is larger than the lower aperture, forming an anchoring step for abutting against the head of the first bolt.

[0009] Compared with the prior art, the above technical solution can anchor the first bolt member on the bolt anchor member, thereby improving the reliability of the connection.

[0010] In a possible embodiment, the second connecting portion includes a plurality of second bolt kits, each of which is arranged on the side of two adjacent reinforced concrete precast panels, and each second bolt kit includes two second bolt members, two second locking nuts and a second connecting plate, one end of the two second bolt members is respectively embedded in the two adjacent reinforced concrete precast panels, and the other end of the two second bolt members is respectively connected to the two ends of the second connecting plate through the second locking nuts.

[0011] Compared with the existing technology, the above technical solution can realize the mutual splicing of two adjacent reinforced concrete prefabricated panels, the structural connection is reliable, and the construction is convenient.

[0012] In a possible implementation, the reinforced concrete precast slab includes edge angle steel, a steel mesh, and a concrete slab. The edge angle steel is wrapped around the edges of the concrete slab, and the steel mesh is embedded in the concrete slab.

[0013] Compared with the existing technology, the above technical solution can improve the structural strength of reinforced concrete precast panels.

[0014] In a possible embodiment, two layers of the steel mesh are embedded in the concrete slab. The steel mesh is staggered with horizontal and vertical steel bars. Several welded parts for connecting edge angle steels are provided around the edges of the steel mesh.

[0015] Compared with the existing technology, the above technical solution can further improve the structural strength of reinforced concrete precast panels.

[0016] In a possible implementation, a base for connecting to a guardrail is embedded in the concrete slab, and the base is connected to the guardrail via bolts.

[0017] Compared with the existing technology, the above technical solution can facilitate the installation of guardrails and improve construction efficiency.

[0018] In a possible implementation manner, a hanging piece for demoulding is embedded in the concrete slab.

[0019] Compared with the existing technology, the above technical solution can facilitate the movement of reinforced concrete prefabricated panels.

[0020] In a possible implementation manner, the top surface of the concrete slab is provided with anti-slip grooves.

[0021] Compared with the existing technology, the above technical solution can increase the friction on the top surface of the concrete slab and avoid slipping during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the installation and use of the utility model;

[0023] Figure 2 for Figure 1 A partial enlarged view of

[0024] Figure 3 for Figure 1 Partial side view of;

[0025] Figure 4 It is a partial structural schematic diagram of the first bolt kit;

[0026] Figure 5 is a structural schematic diagram of the first connecting plate;

[0027] Figure 6 This is a schematic diagram of the installation and use of the second connecting part;

[0028] Figure 7 is a partial structural diagram of the second bolt kit;

[0029] Figure 8 is a structural schematic diagram of the second connecting plate;

[0030] Figure 9 This is a schematic diagram of the front structure of the reinforced concrete precast panel;

[0031] Figure 10 This is a schematic diagram of the back structure of a reinforced concrete precast slab;

[0032] Figure 11 Schematic diagram of the structure of the upper and lower layers of the steel mesh;

[0033] Figure 12 for Figure 11 A partial enlarged view of

[0034] Figure 13 is a structural diagram of the base;

[0035] Figure 14 It is a structural diagram of the hanging parts;

[0036] Figure 15 is a structural diagram of a bolt anchor;

[0037] Figure 16 This is a schematic diagram of the front structure of the edge angle steel;

[0038] Figure 17 This is a schematic diagram of the back structure of the cladding angle steel;

[0039] Description of reference numerals:

[0040] 1. Reinforced concrete precast slab; 11. Edge steel angle; 12. Reinforcement mesh; 121. Welding parts; 13. Concrete slab; 14. Base; 15. Hanging parts; 2. First connecting part; 21. First bolt kit; 211. First bolt member; 212. First locking nut; 213. Bolt anchor member; 214. First connecting plate; 3. Second connecting part; 31. Second bolt kit; 311. Second bolt member; 312. Second locking nut; 313. Second connecting plate; 4. Longitudinal beam; 5. Guardrail. DETAILED DESCRIPTION

[0041] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0042] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0043] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] See also Figures 1 to 17 The embodiment of the present application discloses a prefabricated assembled UHPC-steel composite bridge deck structure suitable for a trestle, comprising a reinforced concrete precast panel 1, a first connecting portion 2, and a second connecting portion 3; the reinforced concrete precast panels 1 are provided in plurality, and the plurality of reinforced concrete precast panels 1 are laid flat on the longitudinal beam 4 of the Bailey beam of the trestle; the first connecting portion 2 comprises a plurality of first bolt kits 21, and the plurality of first bolt kits 21 are distributed at the bottom of the reinforced concrete precast panel 1, and each first bolt kit 21 comprises two first bolt members 211, two first locking nuts 212, and two bolt anchors The reinforced concrete precast slab 1 comprises a plurality of bolt anchors 213 and a first connecting plate 214. The two bolt anchors 213 are embedded in the reinforced concrete precast slab 1 at intervals. The two first bolts 211 pass through the two bolt anchors 213 and are connected to the ends of the first connecting plate 214 via first locking nuts 212, respectively. This allows the longitudinal beam 4 of the Bailey beam to be threaded between the first connecting plate 214 and the reinforced concrete precast slab 1. The second connecting portion 3 is provided between two adjacent reinforced concrete precast slabs 1 to connect the two adjacent reinforced concrete precast slabs 1. The reinforced concrete precast slab 1 is an ultra-high performance concrete (UHPC) precast slab with high strength and toughness.

[0046] As can be seen from the above, several reinforced concrete precast panels 1 are laid flat on the trestle to replace the traditional steel bridge panels, thereby reducing the damage of the bridge panels such as excessive deformation, cracking, corrosion, etc. At the same time, the first connecting part 2 reliably connects the several reinforced concrete precast panels 1 to the longitudinal beam 4 of the Bailey beam of the trestle, and the second connecting part 3 splices two adjacent reinforced concrete precast panels 1 with each other. That is, the bridge panels of this application are prefabricated in blocks in the factory and transported to the site for assembly. The construction is convenient and fast, with high strength and toughness, good driving comfort and good durability.

[0047] like Figure 15As shown, in this embodiment, the bolt anchor 213 is a hollow sleeve, and the upper aperture of the hollow sleeve is set larger than the lower aperture, forming an anchoring step for abutting against the head of the first bolt member 211, thereby enabling the first bolt member 211 to be anchored on the bolt anchor 213, thereby improving the reliability of the connection.

[0048] In this embodiment, the second connection part 3 includes a plurality of second bolt kits 31, each of which is arranged on the side of two adjacent reinforced concrete precast panels 1, and each second bolt kit 31 includes two second bolt members 311, two second locking nuts 312 and a second connecting plate 313. One end of the two second bolt members 311 is respectively embedded in the two adjacent reinforced concrete precast panels 1, and the other end of the two second bolt members 311 is respectively connected to the two ends of the second connecting plate 313 through the second locking nuts 312, thereby realizing the mutual splicing of two adjacent reinforced concrete precast panels 1, the structural connection is reliable, and the construction is convenient.

[0049] like Figure 9 and Figure 10 As shown, in this embodiment, the reinforced concrete precast panel 1 includes an edge steel angle 11, a steel mesh 12, and a concrete panel 13. The edge steel angle 11 is wrapped around the edges of the concrete panel 13, and the steel mesh 12 is embedded within the concrete panel 13, thereby improving the structural strength of the reinforced concrete precast panel 1. Specifically, two layers of the steel mesh 12 are embedded within the concrete panel 13. The steel mesh 12 is arranged with horizontal and vertical steel bars interlaced, and the edges of the steel mesh 12 are provided with several welded parts 121 for connecting to the edge steel angle 11.

[0050] like Figure 13 As shown, in this embodiment, a base 14 for connecting the guardrail 5 is embedded in the concrete slab 13. The base 14 is connected to the guardrail 5 by bolts, thereby facilitating the installation of the guardrail 5 and improving construction efficiency.

[0051] like Figure 14 As shown, in this embodiment, a hanger 15 for demoulding is embedded in the concrete slab 13, thereby making it easy to move the reinforced concrete precast slab 1.

[0052] In this embodiment, the top surface of the concrete slab 13 is provided with anti-skid grooves, thereby increasing the friction force of the top surface of the concrete slab 13 and preventing the vehicle from slipping during driving.

[0053] The bridge deck prefabrication and installation process is as follows:

[0054] Step 1: Determine the required size of the UHPC-steel composite bridge deck based on the actual construction vehicle size and axle load calculations on site;

[0055] Step 2: The edge angle steel 11 is welded into a frame, which can be used as a side formwork. The bridge deck is prefabricated using the flip-up method, and the bottom membrane is made of embossed steel plate to form a texture on the bridge deck and play a role in anti-slip. The upper and lower layers of steel mesh 12 are processed and manufactured in advance according to the design requirements. First, the top layer of steel mesh 12 is placed in the frame of the edge angle steel 11. The steel mesh 12 is firmly welded to the edge angle steel 11 every 50 cm or so. Then, the bottom layer of steel mesh 12 is placed and welded to the edge angle steel 11 at a certain distance to form a whole. During this process, pay attention to the accurate placement of the embedded parts. Pour UHPC and cure it. When the strength reaches the required level, the entire bridge deck is removed from the bottom formwork and transported to the storage area.

[0056] Step 3: Place the UHPC-steel composite bridge decks one by one on the Bailey beam trestle according to the predetermined size and position, bolt them to the Bailey beam through the first connection part 2, bolt the adjacent bridge decks to each other through the second connection part 3, and bolt them to the prefabricated railings through the base 14;

[0057] Step 4: Acceptance after construction.

[0058] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0059] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0060] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A prefabricated UHPC-steel composite bridge deck structure suitable for a trestle, characterized in that: The invention comprises a reinforced concrete precast panel (1), a first connecting portion (2) and a second connecting portion (3); the reinforced concrete precast panel (1) is provided in a plurality, and the plurality of reinforced concrete precast panels (1) are laid flat on the longitudinal beam (4) of the Bailey beam of the trestle; the first connecting portion (2) is provided between the reinforced concrete precast panel (1) and the longitudinal beam (4) and is used to connect the reinforced concrete precast panel (1) to the longitudinal beam (4) in a detachable manner; the second connecting portion (3) is provided between two adjacent reinforced concrete precast panels (1) and is used to splice the two adjacent reinforced concrete precast panels (1) together.

2. The prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle according to claim 1, characterized in that: The first connection portion (2) includes a plurality of first bolt kits (21), and the plurality of first bolt kits (21) are distributed at the bottom of the reinforced concrete precast plate (1). Each of the first bolt kits (21) includes two first bolt members (211), two first locking nuts (212), two bolt anchors (213) and a first connection plate (214). The two bolt anchors (213) are embedded in the reinforced concrete precast plate (1) at intervals. The two first bolt members (211) respectively pass through the two bolt anchors (213). The two first bolt members (211) are respectively connected to the two ends of the first connection plate (214) through the first locking nuts (212), so as to connect the longitudinal beam (4) between the first connection plate (214) and the reinforced concrete precast plate (1).

3. The prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle according to claim 2, characterized in that: The bolt anchor (213) is a hollow sleeve, and the upper aperture of the hollow sleeve is larger than the lower aperture, forming an anchoring step for abutting against the head of the first bolt (211).

4. The prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle according to claim 1, characterized in that: The second connection portion (3) includes a plurality of second bolt kits (31), each of which is arranged on the side of two adjacent reinforced concrete precast panels (1), and each of which includes two second bolt members (311), two second locking nuts (312) and a second connection plate (313), one end of each of the two second bolt members (311) is respectively embedded in the two adjacent reinforced concrete precast panels (1), and the other end of each of the two second bolt members (311) is respectively connected to the two ends of the second connection plate (313) through the second locking nuts (312).

5. The prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle according to claim 1, characterized in that: The reinforced concrete prefabricated panel (1) comprises an edge steel angle (11), a steel mesh (12) and a concrete panel (13); the edge steel angle (11) is wrapped around the edges of the concrete panel (13); and the steel mesh (12) is embedded in the concrete panel (13).

6. The prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle according to claim 5, characterized in that: Two layers of upper and lower steel mesh (12) are embedded in the concrete slab (13). The steel mesh (12) is composed of horizontal and vertical steel bars arranged in an interlaced manner. Several welded parts (121) for connecting the edge angle steel (11) are provided around the edge of the steel mesh (12).

7. The prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle according to claim 5, characterized in that: A base (14) for connecting to the guardrail (5) is embedded inside the concrete slab (13), and the base (14) is connected to the guardrail (5) via bolts.

8. The prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle according to claim 5, characterized in that: A hanging piece (15) for demoulding is embedded inside the concrete slab (13).

9. The prefabricated and assembled UHPC-steel composite bridge deck structure suitable for a trestle according to claim 5, characterized in that: The top surface of the concrete slab (13) is provided with anti-slip grooves.

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