Modularized steel structure bridge

Abstract

An upper main body structure of the modular steel structure bridge is composed of a plurality of prefabricated units. Each prefabricated unit comprises at least two pavement slabs and at least one longitudinal beam; or the pavement structure comprises at least one pavement slab and at least two longitudinal beams; wherein at least one longitudinal beam is connected with at least one bridge deck slab through a hinge. Space can be remarkably saved during transportation, the transportation cost can be remarkably reduced, meanwhile, flexible combination can be achieved during site construction, different bridge structure requirements are met, and therefore the problems that in the prior art, the transportation and construction period is long, flexibility is poor, and the maintenance cost is high are solved, and wide application prospects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of bridges, in particular to a modular steel structure bridge. Background Art

[0002] At present, the construction of bridges mainly adopts traditional cast-in-place or prefabricated structures. Although these technologies meet the needs of engineering construction to a certain extent, they also have many limitations. The traditional bridge construction method has complicated on-site construction, long construction period, and is greatly affected by various factors such as weather and terrain, making it difficult to ensure the quality of the project. At the same time, there are many limitations and difficulties in the transportation of bridges, especially for the construction of long-span bridges, the complexity and cost of the transportation link increase significantly.

[0003] In the prior art, some bridges are constructed using prefabricated components. However, the size and shape of prefabricated components are fixed, and the on-site connection work has high requirements for construction control and technology, high construction costs, and difficult quality control. In addition, the transportation and installation of traditional prefabricated bridge components usually require the support of large-scale mechanical equipment, which increases the cost and difficulty of construction.

[0004] In addition, the traditional bridge construction method has a low degree of standardization and is not easy to repair and dismantle. In particular, many bridges may have problems such as material aging and structural damage after years of use. However, the traditional bridge dismantling and replacement process is often long and has a great impact, resulting in high maintenance costs and great safety hazards. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a modular steel structure bridge with high transportation efficiency and flexible and quick assembly.

[0006] The technical solution of the present invention is: a modular steel structure bridge, whose upper main structure is composed of multiple prefabricated units; the prefabricated units include at least two road panels and at least one longitudinal beam; or include at least one road panel and at least two longitudinal beams; wherein at least one longitudinal beam is hingedly connected to at least one bridge panel.

[0007] Furthermore, the cross-sectional shape of the prefabricated unit is T-shaped, Π-shaped or F-shaped.

[0008] Further, when the cross-sectional shape of the prefabricated unit is T-shaped, it includes two road panels and a longitudinal beam arranged between the joints of the road panels; the two road panels are hingedly connected to the upper sides of the longitudinal beam respectively; or when the cross-sectional shape of the prefabricated unit is Π-shaped, it includes 1 to 3 road panels and two longitudinal beams, and each road panel is hingedly connected to each longitudinal beam; or when the cross-sectional shape of the prefabricated unit is F-shaped, it includes two road panels and two longitudinal beams, and each road panel is hingedly connected to each longitudinal beam.

[0009] Furthermore, at least one side of the upper part of the longitudinal beam is provided with a first hinge seat arranged at intervals along its length direction, and the road panel is provided with a second hinge seat corresponding to the hinge with the longitudinal beam, the second hinge seat is staggered with the first hinge seat, the first hinge seat and the second hinge seat are provided with holes and have connecting shafts built in, and the nuts at both ends of the connecting shaft are fixed.

[0010] Furthermore, the road panel or longitudinal beam can be flipped around the connecting axis within a range of 90 degrees through the corresponding hinge seat; when the upper two sides of the longitudinal beam are hinged to the two road panels, the first hinge seat is a double hinge seat.

[0011] Furthermore, the main body of the double-hinged seat is provided with an inner concave surface, and the longitudinal beam is provided with a groove frame on the side connected to the double-hinged seat, and the horizontal surface of the groove frame is arranged toward the double-hinged seat, so that the inner concave surface of the double-hinged seat is just in horizontal contact with and connected to the groove frame; or a protrusion extending toward the groove frame of the longitudinal beam is provided at the center position of the inner concave surface of the double-hinged seat, and the groove of the groove frame is arranged toward the double-hinged seat, so that the protrusion extends into the groove of the groove frame and is connected to the groove frame.

[0012] Furthermore, at least one end of the longitudinal beam is provided with a longitudinal beam end flange for connecting to other prefabricated unit longitudinal beams; both ends of the road panel are provided with road panel end flanges for connecting to other prefabricated unit road panels; the road panel and the longitudinal beam are both core panels.

[0013] Furthermore, the upper main structure of the bridge is formed by a plurality of identical prefabricated units spliced ​​along the length direction of the bridge to form a bridge monomer; or the upper main structure of the bridge is formed by the same or different bridge monomers spliced ​​along the width direction of the bridge; or the upper main structure of the bridge is formed by at least one bridge monomer and a plurality of I-shaped prefabricated single plates spliced ​​along the width direction of the bridge.

[0014] Furthermore, during transportation, two sets of prefabricated units with T-shaped cross-sections are combined to form a transport body that conforms to the size of a container; or a set of prefabricated units with F-shaped cross-sections are combined with at least one I-shaped prefabricated single board to form a transport body that conforms to the size of a container; or a set of prefabricated units with Π-shaped cross-sections are combined with at least one I-shaped prefabricated single board to form a transport body that conforms to the size of a container; wherein the I-shaped prefabricated single board is a single road panel or a longitudinal beam.

[0015] Furthermore, during transportation, two sets of prefabricated units with a T-shaped cross-section are combined, wherein the longitudinal beam of one prefabricated unit serves as the bottom plate of the box, one road panel serves as one side wall of the box, and the other road panel is flipped to the bottom of the longitudinal beam to form a double-layer bottom plate with the longitudinal beam; the longitudinal beam of the other prefabricated unit serves as the top plate of the box, one road panel serves as the other side wall of the box, and the other road panel is flipped to the top of the longitudinal beam to form a double-layer top plate with the longitudinal beam, so as to form a transport body that meets the size of the container, and the octagonal corners of the transport body are provided with corner fittings.

[0016] Furthermore, when the prefabricated units are combined to form a wide bridge body during on-site construction, at least one of the following combined structures is included: Section 1: T-shaped prefabricated units are connected between adjacent F-shaped prefabricated units; Section 2: Adjacent T-shaped prefabricated units are connected to Π-shaped prefabricated units; Section 3: Adjacent F-type prefabricated units are connected with Π-type prefabricated units; Section 4: T-shaped prefabricated units are connected between adjacent Π-shaped prefabricated units; Section 5: The T-shaped prefabricated units are combined with each other; Section 6: I-shaped prefabricated veneers are connected between adjacent F-shaped prefabricated units; Section 7: I-shaped prefabricated veneers are connected between adjacent Π-shaped prefabricated units; Section 8: Π-shaped prefabricated units are connected between adjacent I-shaped prefabricated veneers; Section 9: Based on Section 2, the T-shaped prefabricated units located on the outside are all connected to the F-shaped prefabricated units.

[0017] Beneficial effects of the present invention: (1) By setting a hinge connection between the road panel and the longitudinal beam, the prefabricated units can be combined to form a container structure for transportation, which greatly improves transportation efficiency, reduces transportation costs, and realizes rapid assembly on site; (2) By flexibly combining multiple prefabricated units, they can be adjusted and optimized according to actual needs to meet the requirements of different geographical and engineering conditions, greatly improving the adaptability, engineering efficiency and construction quality of bridge construction; (3) Modular design can greatly shorten the on-site construction period. Through standardized prefabricated units, rapid splicing and assembly can be achieved, and the maintenance and disassembly of the bridge are more flexible, which reduces the difficulty of traditional bridge dismantling and reduces the subsequent maintenance costs. (5) By bending the core panel of the road panel and setting a flange patch at the bending position, it is convenient to connect adjacent road panels. In this way, when setting the hinge group, the road panels can be fixed first and then the hinge group can be welded. On the one hand, the bent panel can be more tightly connected to the adjacent core panel, which improves the stability of the structure. The setting of the flange patch not only enhances the reliability of the connection, but also simplifies the installation process. On the other hand, by fixing the road panel before setting the hinge group, the error caused by the displacement of the plate during the welding process of the hinge group can be effectively avoided, thereby ensuring the overall precise docking. (6) The design of the hinge group ensures the precise docking and stability of the hinges and double hinges by staggering all the hinges on the pavement slab and all the double hinges on the longitudinal beam and placing axle pads between them; a flexible rotational connection between the pavement slab and the longitudinal beam can be achieved by passing the connecting shaft through the reaming hole and fixing its two ends with nuts; it can be said that, firstly, the staggered hinges and double hinges make the force more uniform, avoid local overload, and improve the durability of the structure; secondly, the setting of axle pads reduces wear and friction and prolongs the service life; finally, the rotational connection method of the hinge group makes the relative movement between the pavement slab and the longitudinal beam smoother, thereby improving the overall work efficiency and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a simplified structural diagram of a T-shaped prefabricated unit according to Embodiment 1 of the present invention; Figure 2 It is a schematic structural diagram of a T-shaped prefabricated unit with a flange according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of a road panel according to Embodiment 1 of the present invention; Figure 4 yes Figure 3 The AA cross-sectional view and a partially enlarged schematic view of the embodiment 1 are shown; Figure 5 is a schematic structural diagram of a longitudinal beam according to Embodiment 1 of the present invention; Figure 6 Schematic diagram of the connection structure between the longitudinal beam end flange and the longitudinal beam according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the connection between the road panel and the longitudinal beam in Example 1 of the present invention; Figure 8 This is a schematic structural diagram of a hinge seat according to Embodiment 1 of the present invention; Fig. 9 This is a schematic structural diagram of a double hinge seat according to Embodiment 1 of the present invention; Fig.10 is a schematic diagram of the overall structure of the hinge assembly of Example 1 of the present invention; Fig.11 It is a simplified structural diagram of an F-type prefabricated unit according to Embodiment 2 of the present invention; Fig.12 This is a schematic diagram of a simplified structure of a straight-line prefabricated single board according to Embodiment 2 of the present invention; Fig.13 1 is a simplified structural diagram of a Π-shaped prefabricated unit according to Embodiment 3 of the present invention; Fig.14 is a schematic structural diagram of the combination of prefabricated units in Example 5 of the present invention (without lateral support); Fig.15 It is a structural schematic diagram of the combination of prefabricated units in Example 6 of the present invention (with lateral support); Fig.16 is a schematic structural diagram of a double hinge seat according to embodiment 7 of the present invention; Fig.17 is a schematic structural diagram of a T-shaped prefabricated unit with a flange according to Embodiment 7 of the present invention; Fig.18 is a schematic structural diagram of a longitudinal beam according to Embodiment 7 of the present invention; Fig.19 is a schematic diagram of the connection between the road panel and the longitudinal beam in Example 7 of the present invention; Fig. 20 It is a schematic diagram of the overall structure of the hinge assembly of Example 7 of the present invention.

[0019] Description of the accompanying drawings: 1. Road plate; 2. Longitudinal beam; 3. Core plate; 4. Road plate end flange; 5. Hinge seat; 6. Longitudinal beam end flange; 7 (7′), double hinge seat; 8. Axle pad; 9. Connecting shaft; 10. I-shaped prefabricated single plate; 11. First road panel; 12. Second road panel; 21. First longitudinal beam; 22. Second longitudinal beam; 31. Upper panel; 32. Lower panel; 33. Sandwich layer; 34. Bending portion; 35. Flange patch; 36. Straight frame; 37. Grooved frame; 41. Upper flange; 42. Lower flange; 71′, protrusion. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 like Figure 1 to Figure 10 As shown: a modular steel structure bridge, whose upper main structure is composed of multiple prefabricated units; at least one prefabricated unit includes two road panels 1 and a longitudinal beam 2, the longitudinal beam 2 is arranged at the bottom joint of the two road panels 1, and the entire cross-sectional shape is T-shaped; the two road panels 1 are hingedly connected to the upper two sides of the longitudinal beam 2 respectively.

[0022] In this embodiment, the road panel and the longitudinal beam are preferably core panels 3, and the core panels 3 are preferably made of steel, such as stainless steel. The core panel includes an upper panel 31, a lower panel 32, a sandwich layer 33 disposed therebetween, and a frame disposed around the sandwich layer 33. The sandwich layer can be a hollow tube array, a honeycomb layer, or a corrugated layer, etc. The sandwich layer 33 in this embodiment is preferably a hollow tube array.

[0023] In this embodiment, two road panels 1 are connected along the length direction, and the longitudinal beam 2 extends along the length direction of the road panel 1. At least one end face of the road panel is provided with a road panel end flange 4, and the road panel end flange 4 includes an upper flange 41 and a lower flange 42, and the upper flange 41 and the lower flange 42 extend along the width direction of the road panel 1 to facilitate connection with the road panel end flanges of other road panels. Among them, the lower flange 42 does not extend along the entire width direction of the road panel 1, but forms a blank area at one end close to the longitudinal beam 2, so that a hinge seat 5 is set in the blank area. The bottom surface of the road panel 1 is provided with a plurality of hinge seats 5 arranged at intervals on the side close to the longitudinal beam 2, and the hinge seats 5 are arranged and extended along the length direction of the road panel 1. The hinge seat 5 is preferably welded to the road panel 1. The shape of the hinge seat 5 is triangular or quasi-triangular with an arc, and a reaming hole is provided in the middle of the main body of the hinge seat 5.

[0024] In this embodiment, in the core plate of the road panel 1, both sides of the upper panel 31 thereof are bent upward along the length direction to form a bending portion 34, and a flange patch strip 35 is welded to the inner wall of the bending portion 34, and screw holes communicating with the flange patch strip 35 and the bending portion 34 are provided. The frame arranged along the length direction of the core plate is a straight frame 36, and the straight frame 36 is welded to the bending part of the upper panel 31 of the core plate and sealed with glue. That is, the upper panel 31 of the road panel is bent upward on the side connected to the upper panel of another road panel. In this way, when two adjacent road panels 1 are connected, they are connected by bolts at the bending parts of their respective panels. Similarly, the lower panel 32 of the road panel is bent downward on the side connected to the lower panel of another road panel, and a flange patch strip 35 is provided in the bending area. The specific connection method is the same as that of the upper panel, and will not be described in detail here. It should be noted that the lower panel 32 is not bent on the side close to the longitudinal beam 2, and only a hinge seat 5 needs to be provided.

[0025] In this embodiment, the longitudinal beam 2 is provided with a longitudinal beam end flange 6 at the end surface position connected to other longitudinal beams. The longitudinal beam end flange 6 is arranged along the two sides and the lower part of the longitudinal beam 2, and a blank area is provided on the top to install the double hinge seat 7. The core plate of the longitudinal beam 2 is provided with a groove frame 37 on the side connected to the double hinge seat. The groove of the groove frame 37 is arranged toward the sandwich layer so that the outer surface of the groove frame is flush with the longitudinal beam. There are several double hinge seats 7, which are arranged at intervals along the length direction of the longitudinal beam 2. The main body of the double hinge seat 7 is provided with an inner concave surface. When connected to the longitudinal beam 2, the inner concave surface of the double hinge seat 7 is just in horizontal contact with the groove frame 37 of the core plate and welded, and the open ends of the inner concave surface are welded to the core plate panel of the longitudinal beam. The inner concave surface of the double hinge seat 7 extends in the direction of the hinge seat on the corresponding road panel 1 on both sides, forming a structure with the same shape as the hinge seat 5, and is also provided with a reaming hole, which is arranged corresponding to the reaming hole of the hinge seat 5. The double hinges 7 of the longitudinal beam 2 and the hinges 5 of the road panel 1 are arranged in a staggered manner.

[0026] It can be understood that all the double hinge seats 7 on the longitudinal beam 2 have the same thickness, or the thickness of the two double hinge seats located at the front and rear edges of the longitudinal beam 2 is smaller than the thickness of the other double hinge seats.

[0027] In this embodiment, the specific connection structure of the longitudinal beam 2 and the road panel 1 is as follows: all the hinge seats 5 on the road panel 1 are bored to correspond to all the double hinge seats 7 of the longitudinal beam 2, and the hinge seats 5 and the double hinge seats 7 are staggered, that is, double hinge seats 7 are provided between adjacent hinge seats 5, and shaft pads 8 are provided between the hinge seats 5 and the double hinge seats 7. A connecting shaft 9 runs through the bored hole, and the two ends of the connecting shaft 9 are fixed by nuts. In this way, the road panel 1 and the longitudinal beam 2 can be connected to each other by rotation around the connecting shaft 9.

[0028] In this embodiment, the hinge welding process between two road panels and a longitudinal beam includes: first, the two road panels are fastened with bolts, and then the connecting shaft 9, the hinge seat 5, the double hinge seat 7 and the shaft pad 8 are pre-threaded to form a hinge group; then the hinge group, the longitudinal beam 2 and the road panel 1 are pre-positioned, and the hinge seat 5 and the double hinge seat 7 are welded after ensuring the size.

[0029] This embodiment includes two modes: transportation mode and on-site construction mode, specifically: Transportation method: Combine two sets of prefabricated units with T-shaped cross-sections, where the longitudinal beam of one prefabricated unit serves as the bottom plate of the box, one road panel serves as one side wall of the box, and the other road panel is flipped to the bottom of the longitudinal beam to form a double-layer bottom plate with the longitudinal beam; the longitudinal beam of the other prefabricated unit serves as the top plate of the box, one road panel serves as the other side wall of the box, and the other road panel is flipped to the top of the longitudinal beam to form a double-layer top plate with the longitudinal beam, thereby forming a transport body that meets the size of the container as a whole, and corner fittings are provided at the octagonal corners of the transport body.

[0030] On-site construction method: After two sets of prefabricated units with a T-shaped cross-section are transported to the construction site in a container mode, the two sets of prefabricated units are disassembled and restored to a T-shaped structure by flipping the road panels. After that, several prefabricated units are spliced ​​together to form the upper main structure of the bridge.

[0031] It is understandable that a number of road panels and / or longitudinal beams can be placed in the transport body for overall transportation, which greatly improves the transportation efficiency and reduces the number of transportation times.

[0032] Example 2 The difference from Example 1 is that the cross-sectional shape of the prefabricated unit is different. Specifically: like Fig.11 and Fig.12As shown: A modular steel structure bridge, whose upper main structure is composed of multiple prefabricated units; at least one prefabricated unit includes two road panels 1 and two longitudinal beams 2, one of which (hereinafter referred to as the first longitudinal beam 21) is arranged at the bottom joint of the two road panels, and the other longitudinal beam (hereinafter referred to as the second longitudinal beam 22) is arranged at the bottom edge of one of the road panels (hereinafter referred to as the second road panel 12, and the other is the first road panel 11), so that the entire cross-sectional shape is a horizontally placed F-shaped structure. The first longitudinal beam 21 is hinged to the two road panels, and the second longitudinal beam 22 is fixedly connected or hinged to the two road panels. Among them, the hinge method of the first longitudinal beam 21 and the two road panels is the same as that of Example 1, and will not be described in detail here. The second longitudinal beam 22 is preferably fixedly connected to a road panel by bolt assembly, welding or plug-in.

[0033] This embodiment includes two modes: transportation mode and on-site construction mode, specifically: Transportation method: Combine a set of prefabricated units with an F-shaped cross-section shape with at least one I-shaped prefabricated single board, wherein the first longitudinal beam 21 of the F-shaped prefabricated unit serves as the top plate of the box, and the second longitudinal beam 22 serves as the bottom plate of the box, or vice versa. The first road panel 11 is flipped to the top of the first longitudinal beam 21 to form a double-layer top plate with the first longitudinal beam 21, and the second road panel 12 serves as one side wall of the box, and an I-shaped prefabricated single board 10 is added to the other side wall of the box, thereby forming a transport body that meets the size of the container as a whole, and corner pieces are provided at the four corners of the transport body. It is understandable that an I-shaped prefabricated single board can also be added under the bottom plate of the box to form a double-layer bottom plate. The I-shaped prefabricated single board 10 is a single road panel or a longitudinal beam.

[0034] On-site construction method: After the F-type prefabricated unit is transported to the construction site in a container mode, the F-type prefabricated unit and the additional I-shaped prefabricated single board 10 are separated, and the first road panel is turned over to restore the horizontally placed F-type structure. After that, several prefabricated units are spliced ​​together to form the upper main structure of the bridge.

[0035] Example 3 The difference from Example 1 or Example 2 is that the cross-sectional shape of the prefabricated unit is different. Specifically: like Fig.13 As shown: a modular steel structure bridge, the upper main structure of which is composed of multiple prefabricated units; at least one prefabricated unit includes a road panel 1 and two longitudinal beams 2, and the two longitudinal beams 2 are arranged on both sides of the bottom surface of the road panel 1, so that the entire cross-section is Π-shaped. The two longitudinal beams 2 are preferably fixedly connected to the road panel 1 by bolt assemblies, welding or plug-in, and do not need to be designed as a hinged structure.

[0036] This embodiment includes two modes: transportation mode and on-site construction mode, specifically: Transportation mode: A set of prefabricated units with a Π-shaped cross-section is combined with at least one I-shaped prefabricated single board 10, the road panel 1 of the Π-shaped prefabricated unit forms the top plate (or bottom plate) of the box, the two longitudinal beams 2 form the two side walls of the box, and the bottom plate (or top plate) of the box is formed by adding an additional I-shaped prefabricated single board 10, so as to form a transport body that meets the size of the container as a whole, and corner pieces are provided at the four corners of the transport body. It is understandable that the top surface of the top plate or the bottom surface of the bottom plate of the box can also be added with an I-shaped prefabricated single board 10 to form a double-layer top plate and a double-layer bottom plate.

[0037] On-site construction method: After the Π-shaped prefabricated unit is transported to the construction site in a container mode, the prefabricated unit and the additional I-shaped prefabricated single plate 10 are separated, and then several prefabricated units are spliced ​​together to form the upper main structure of the bridge.

[0038] Example 4 The difference from Example 3 is that the Π-shaped prefabricated unit is composed of three road panels and two longitudinal beams, and the two longitudinal beams are respectively arranged at the bottom joints of each two adjacent road panels. The road panels and the longitudinal beams are hingedly connected. The hinged connection between each longitudinal beam and the two road panels is the same as that in Example 1, and will not be described in detail here.

[0039] This embodiment includes two modes: transportation mode and on-site construction mode, specifically: Transportation method: Combine a set of Π-shaped prefabricated units with a piece of I-shaped prefabricated single board, wherein one longitudinal beam of the Π-shaped prefabricated unit serves as the top plate of the box, and the other longitudinal beam serves as the bottom plate of the box. The road panel on the far left is flipped down to form a double-layer top plate with one longitudinal beam, and the road panel on the far right is flipped down to form a double-layer bottom plate with the other longitudinal beam. The road panel in the middle serves as one side wall of the box, and the other side wall of the box is formed by adding an additional I-shaped prefabricated single board, thereby forming a transport body that meets the size of the container as a whole, and corner fittings are provided at the four corners of the transport body.

[0040] On-site construction method: After the Π-shaped prefabricated unit is transported to the construction site in a container mode, the prefabricated unit and the additional I-shaped prefabricated single board are separated, and the two road panels are flipped upward to restore the original Π-shaped structure. After that, several prefabricated units are spliced ​​together to form the upper main structure of the bridge.

[0041] Example 5 like Fig.14 As shown: In this embodiment, the prefabricated units are combined on the construction site to form a complete upper main structure of the bridge. There are several specific combination methods: Section 1: T-shaped precast units are connected between adjacent F-shaped precast units.

[0042] Section 2: Adjacent T-shaped prefabricated units are connected with Π-shaped prefabricated units.

[0043] Section 3: Adjacent F-type prefabricated units are connected with Π-type prefabricated units.

[0044] Section 4: T-shaped prefabricated units are connected between adjacent Π-shaped prefabricated units.

[0045] Section 5: The T-shaped prefabricated units are combined with each other.

[0046] Section 6: The connection between adjacent F-type prefabricated units is a prefabricated single board with a straight cross-section shape, and the single board is the core board.

[0047] Section 7: A straight-line prefabricated single plate is connected between each adjacent Π-shaped prefabricated unit. For example, three groups of Π-shaped prefabricated units are provided.

[0048] Section 8: Each adjacent I-shaped prefabricated single board is connected with a Π-shaped prefabricated unit; for example, four groups of I-shaped prefabricated single boards are arranged.

[0049] Section 9: Based on Section 2, the T-shaped prefabricated units located on the outside are all connected to the F-shaped prefabricated units.

[0050] Section 10: A straight-line prefabricated single plate is connected between adjacent Π-shaped prefabricated units, for example, two groups of Π-shaped prefabricated units are arranged.

[0051] Section 11: Adjacent I-shaped prefabricated veneers are connected with Π-shaped prefabricated units, for example, two groups of I-shaped prefabricated veneers are arranged.

[0052] Among them, the aforementioned T-shaped prefabricated unit is the structure of Example 1, the F-shaped prefabricated unit is the structure of Example 2, and the Π-shaped prefabricated unit is the structure of Example 3.

[0053] The above are 11 preferred combinations of this embodiment, which can form a complete bridge upper main structure without the need for lateral support. The road panels of adjacent prefabricated units are detachably connected on the side, and the connection method can be flange connection using the side flange of the road panel, or threaded connection through a bolt assembly, or connection by clamping, etc.

[0054] It can be understood that the bridge of this embodiment can be set to a single bridge mode, and can also be set to a combination of multiple prefabricated units or a combination mode between prefabricated units and I-shaped prefabricated single plates as shown in the above-mentioned methods. In the single bridge mode, multiple sets of T-shaped prefabricated units can be laid along the length direction of the bridge, or multiple sets of Π-shaped prefabricated units can be laid along the length direction of the bridge.

[0055] This embodiment can adjust and optimize according to actual needs by flexibly combining various prefabricated units to meet the requirements of different geographical and engineering conditions, thereby greatly improving the adaptability, engineering efficiency and construction quality of bridge construction.

[0056] Example 6 This embodiment is based on the embodiment 5 to set up a lateral support scheme, specifically adding a support structure to the bottom and / or side of the assembled upper main structure of the bridge, and the support structure is a detachable connection. For example: In the section 1 of Example 5, a bottom plate is added between adjacent longitudinal beams at the bottom, and a diagonal brace is added between the road panel and the longitudinal beam at the edge.

[0057] In the cross section 3 of the embodiment 5, the bottom plate is added only between the adjacent longitudinal beams at the bottom.

[0058] In the section 5 of the embodiment 5, diagonal braces may be added between the longitudinal beams of all T-shaped units and each road panel, or diagonal braces may be added only on the outer sides of the T-shaped units at the edges, and bottom plates may be added between adjacent longitudinal beams.

[0059] It can be said that this embodiment can form at least 21 combinations of cross-sectional shapes, as shown in FIG. Fig.15 By setting the lateral support, the stability of the bridge can be further enhanced.

[0060] In summary, the present invention designs the upper main structure of the bridge as a modular structure, and the road panels and longitudinal beams of each prefabricated unit can be hinged and flipped, and can be combined into a container mode during transportation. This design can not only significantly save space and reduce transportation costs during transportation, but also can be flexibly combined during on-site construction to adapt to different bridge structure requirements, thereby solving the problems of difficult transportation, long construction period, poor flexibility, high maintenance cost, etc. in the prior art, and has broad application prospects.

[0061] Example 7 like Figures 16 to 20 As shown: the difference from Example 1 is that the structure of the double hinge seat is different from that of Example 1.

[0062] The center of the inner concave surface of the double hinge seat 7' of this embodiment is provided with a protrusion 71' extending in the direction of the core plate groove frame of the longitudinal beam, and the setting direction of the groove frame of this embodiment is different from that of the embodiment 1, that is, the groove frame 37 is set in the opposite direction, and the groove of the groove frame 37 faces the direction of the double hinge seat 7', so that the protrusion 71' of the double hinge seat 7' can extend into the groove of the groove frame 37, and the side of the protrusion 71' that contacts the groove frame 37 is a horizontal plane, which can be welded and / or glued to the groove frame 37. Preferably, the thickness of the double hinge seat 7' is 30~50mm.

[0063] This embodiment designs the double hinge seat into a structure with a concave surface and a protrusion, which can not only significantly enhance its strength, but also improve its durability and stability. The design of the concave surface can effectively disperse the pressure applied from the outside and reduce the impact of concentrated stress, thereby improving the compressive resistance of the structure; the protrusion can provide additional support and fixing effects in actual use to prevent loosening due to external force or vibration. At the same time, this embodiment can improve the matching accuracy between the double hinge seat and the core plate by matching the protrusion of the double hinge seat with the reverse setting of the groove frame, enhance the overall seismic resistance and fatigue resistance, and extend the service life.

[0064] In summary, the present invention, by setting a hinge connection between the road panel and the longitudinal beam, can make the prefabricated units form a container structure for transportation by combining, which greatly improves the transportation efficiency, reduces the transportation cost, and realizes the rapid assembly on site; by flexibly combining multiple prefabricated units, it can be adjusted and optimized according to actual needs to meet the requirements of different geographical and engineering conditions, which greatly improves the adaptability, engineering efficiency and construction quality of bridge construction; modular design can greatly shorten the on-site construction period, and through standardized prefabricated units, rapid splicing and assembly can be achieved, and the maintenance and disassembly of the bridge are made more flexible, which reduces the difficulty of traditional bridge demolition and reduces the later maintenance cost.

[0065] In addition, the term "connection" should be understood in a broad sense, for example, it can include fixed connection, detachable connection or integral connection; it can include direct connection, indirect connection through an intermediate medium, and can also include internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A modular steel structure bridge, the upper main structure of which is composed of multiple prefabricated units; characterized in that: The prefabricated unit comprises at least two road panels and at least one longitudinal beam; or comprises at least one road panel and at least two longitudinal beams; wherein at least one longitudinal beam is hinged to at least one bridge panel.

2. The modular steel structure bridge according to claim 1, characterized in that: The cross-sectional shape of the prefabricated unit is T-shaped, Π-shaped or F-shaped.

3. The modular steel structure bridge according to claim 2, characterized in that: When the cross-sectional shape of the prefabricated unit is T-shaped, it includes two road panels and a longitudinal beam arranged between the joints of the road panels; the two road panels are hingedly connected to the upper two sides of the longitudinal beam respectively; or when the cross-sectional shape of the prefabricated unit is Π-shaped, it includes 1 to 3 road panels and two longitudinal beams, and each road panel is hingedly connected to each longitudinal beam; or when the cross-sectional shape of the prefabricated unit is F-shaped, it includes two road panels and two longitudinal beams, and each road panel is hingedly connected to each longitudinal beam.

4. The modular steel structure bridge according to claim 1, 2 or 3, characterized in that: At least one side of the upper part of the longitudinal beam is provided with a first hinge seat arranged at intervals along its length direction, and the road panel is provided with a second hinge seat corresponding to the hinge with the longitudinal beam, the second hinge seat is staggered with the first hinge seat, the first hinge seat and the second hinge seat are provided with holes and have connecting shafts built in, and the nuts at both ends of the connecting shaft are fixed.

5. The modular steel structure bridge according to claim 4, characterized in that: The road panel or longitudinal beam can be flipped around the connecting axis within a range of 90° through the corresponding hinge seat; when the upper two sides of the longitudinal beam are hinged to the two road panels, the first hinge seat is a double hinge seat; the main body of the double hinge seat is provided with an inner concave surface, and the longitudinal beam is provided with a groove frame on the side connected to the double hinge seat, and the horizontal surface of the groove frame is arranged toward the double hinge seat, so that the inner concave surface of the double hinge seat is just in horizontal contact with and connected to the groove frame; or a protrusion extending toward the groove frame of the longitudinal beam is provided at the center position of the inner concave surface of the double hinge seat, and the groove of the groove frame is arranged toward the double hinge seat, so that the protrusion extends into the groove of the groove frame and is connected to the groove frame.

6. The modular steel structure bridge according to claim 1, 2 or 3, characterized in that: At least one end of the longitudinal beam is provided with a longitudinal beam end flange for connecting to other prefabricated unit longitudinal beams; both ends of the road panel are provided with road panel end flanges for connecting to other prefabricated unit road panels; the road panel and the longitudinal beam are both core panels.

7. The modular steel structure bridge according to claim 1, 2 or 3, characterized in that: The upper main structure of the bridge is formed by splicing a plurality of identical prefabricated units along the length direction of the bridge to form a bridge monomer; or the upper main structure of the bridge is formed by splicing the same or different bridge monomers along the width direction of the bridge; or the upper main structure of the bridge is formed by splicing at least one bridge monomer and a plurality of I-shaped prefabricated single plates along the width direction of the bridge.

8. The modular steel structure bridge according to claim 2 or 3, characterized in that: During transportation, two sets of prefabricated units with T-shaped cross-sections are combined to form a transport body that meets the size of a container; or a set of prefabricated units with F-shaped cross-sections are combined with at least one I-shaped prefabricated single board to form a transport body that meets the size of a container; or a set of prefabricated units with Π-shaped cross-sections are combined with at least one I-shaped prefabricated single board to form a transport body that meets the size of a container; wherein the I-shaped prefabricated single board is a single road panel or a longitudinal beam.

9. The modular steel structure bridge according to claim 2 or 3, characterized in that: During transportation, two sets of prefabricated units with a T-shaped cross-section are combined, wherein the longitudinal beam of one prefabricated unit serves as the bottom plate of the box, one road panel serves as one side wall of the box, and the other road panel is flipped to the bottom of the longitudinal beam to form a double-layer bottom plate with the longitudinal beam; the longitudinal beam of the other prefabricated unit serves as the top plate of the box, one road panel serves as the other side wall of the box, and the other road panel is flipped to the top of the longitudinal beam to form a double-layer top plate with the longitudinal beam, so as to form a transport body that meets the size of the container, and the octagonal corners of the transport body are provided with corner fittings.

10. The modular steel structure bridge according to claim 2 or 3, characterized in that: When the prefabricated units are combined to form a wide bridge body during on-site construction, it includes at least one of the following combined structures: Section 1: T-shaped prefabricated units are connected between adjacent F-shaped prefabricated units; Section 2: Adjacent T-shaped prefabricated units are connected to Π-shaped prefabricated units; Section 3: Adjacent F-type prefabricated units are connected with Π-type prefabricated units; Section 4: T-shaped prefabricated units are connected between adjacent Π-shaped prefabricated units; Section 5: The T-shaped prefabricated units are combined with each other; Section 6: I-shaped prefabricated veneers are connected between adjacent F-shaped prefabricated units; Section 7: I-shaped prefabricated veneers are connected between adjacent Π-shaped prefabricated units; Section 8: Π-shaped prefabricated units are connected between adjacent I-shaped prefabricated veneers; Section 9: Based on Section 2, the T-shaped prefabricated units located on the outside are all connected to the F-shaped prefabricated units.

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