Large-span continuous wave web steel-concrete composite box girder structure

Abstract

The application relates to the technical field of bridge structures, and discloses a large-span continuous wave-shaped web steel-concrete composite box girder structure, a box unit comprises a bottom plate unit, web units symmetrically and longitudinally distributed on both sides of the upper end of the bottom plate unit, and a plurality of groups of spacing-keeping and transversely distributed baffle units arranged at the upper end of the bottom plate unit; an intermediate reinforcing assembly is arranged in the box unit, the intermediate reinforcing assembly comprises longitudinal reinforcing pipe fittings centrally penetrating the plurality of groups of baffle units, transversely reinforcing rod fittings fixedly penetrating between the web units, square locking fittings fixedly connected at the longitudinal reinforcing pipe fittings and the transversely reinforcing rod fittings, and corner reinforcing fittings connected at four corners of the square locking fittings; the wave-shaped web of the application does not need additional stiffening ribs, the shear resistance, the buckling resistance and the toughness are improved, and the fatigue damage is reduced; the longitudinally and transversely intersecting intermediate reinforcing assembly forms a global reinforcing network, the overall bearing capacity and the anti-deformation capacity of the box girder are improved, local stress concentration is avoided, and the service life of the bridge is prolonged.

Description

Technical Field

[0001] This invention relates to the field of bridge structure technology, specifically to a long-span continuous corrugated web steel-concrete composite box girder structure. Background Technology

[0002] In the field of long-span bridge construction, steel-concrete composite box girders are widely used in cross-sea, cross-river, and urban elevated highway projects due to their combination of the tensile strength of steel and the compressive strength of concrete. Addressing the issue of cracking in the webs of traditional concrete bridges, promoting the construction of corrugated steel web composite structure bridges presents a good opportunity to improve the quality of highway bridges, promote highway transformation and upgrading, and enhance efficiency. However, existing long-span composite box girders still have many shortcomings: traditional flat webs require numerous stiffening ribs to resist buckling, resulting in large material consumption and complex processing; the splicing of various box girder units relies heavily on fasteners, which can easily lead to loosening at the joints; and the overall resistance to flexural deformation is insufficient, making it difficult to meet the demands of long-span heavy loads, easily leading to localized stress concentration and shortening the bridge's service life. Therefore, an optimized structure is urgently needed to solve these problems. To this end, we introduce a long-span continuous corrugated web steel-concrete composite box girder structure. Summary of the Invention

[0003] The purpose of this invention is to provide a large-span continuous corrugated web steel-concrete composite box girder structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A long-span continuous corrugated web steel-concrete composite box girder structure includes a box unit, wherein the box unit includes a bottom plate unit, web units symmetrically distributed longitudinally on both sides of the upper end of the bottom plate unit, and several sets of equally spaced and transversely distributed partition units provided at the upper end of the bottom plate unit.

[0006] The web unit includes a corrugated web fixed to the upper end of the base plate unit and a side top plate fixed to the top of the corrugated web.

[0007] The upper end of the base plate unit is provided with several sets of partition units that are equally spaced and distributed laterally. Each partition unit includes a middle vertical plate, diagonal bracing plates symmetrically arranged on both sides of the middle vertical plate, and a middle top plate fixed to the top of the middle vertical plate and the diagonal bracing plates. The middle top plate is fixed to the inner wall of the side top plate.

[0008] The box unit is equipped with an intermediate reinforcing component. The intermediate reinforcing component includes a longitudinal reinforcing tube that runs through several sets of partition units in the center, a transverse reinforcing rod that runs through and is fixed between the web units, a square locking member that is fixed at the connection between the longitudinal reinforcing tube and the transverse reinforcing rod, and corner reinforcing members that are connected at the four corners of the square locking member. The end of the corner reinforcing member is connected between the side top plate and the bottom plate unit.

[0009] Preferably, the base plate unit includes a rectangular base plate and several sets of reinforcing protrusions that are evenly spaced and longitudinally distributed at the upper center of the rectangular base plate.

[0010] Preferably, the bottom of the intermediate upright plate and the diagonal brace plate are provided with several sets of equally spaced slots, and the reinforcing protrusions are inserted into the corresponding slots.

[0011] Preferably, manholes are symmetrically provided on both sides between the intermediate vertical plate and the diagonal brace, and a central through-hole for passing through the longitudinal reinforcing pipe is provided in the middle between the intermediate vertical plate and the diagonal brace.

[0012] Preferably, the transverse reinforcing rod is passed through the longitudinal reinforcing tube, and the two ends of the transverse reinforcing rod extend through the corrugated web and are locked and fixed with nuts.

[0013] Preferably, the square locking component includes an upper end cap and a lower end cap fixed above and below the connection between the longitudinal reinforcing tube and the transverse reinforcing rod. The upper end cap and the lower end cap have the same shape, and both the upper end cap and the lower end cap are provided with a longitudinal arc groove and a transverse arc groove. The longitudinal reinforcing tube and the transverse reinforcing rod are respectively locked in the longitudinal arc groove and the transverse arc groove.

[0014] Preferably, the corner reinforcement includes a U-shaped connector that is snapped into the corner of the upper and lower end covers, a support block fixed in the middle of the U-shaped connector by a horizontal plate, and a reinforcing diagonal brace connecting the support block and the U-shaped connector.

[0015] The reinforcing diagonal brace is fixed between the side top plate and the bottom plate unit.

[0016] Preferably, the U-shaped connector is movably connected to the corner of the upper and lower end covers using a screw, and the upper and lower end covers are fixed by the screw.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the corrugated web of the present invention does not require additional stiffening ribs, saving materials and reducing manufacturing costs, while improving shear resistance, buckling resistance and toughness, and reducing fatigue damage; modular splicing combined with snap-fit ​​positioning simplifies the construction process; the crisscrossing intermediate reinforcing components form a full-area reinforcing network, improving the overall load-bearing capacity and deformation resistance of the box girder, adapting to the requirements of large-span heavy loads, achieving graded and full-area load distribution, avoiding local stress concentration, and extending the service life of the bridge. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of the overall assembly of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the base plate unit of the present invention;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the partition unit of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the assembly of the partition unit and the base plate unit of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the web unit of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the assembly of the web unit, partition unit, and bottom plate unit of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the intermediate reinforcing component of the present invention;

[0025] Figure 8 This is an exploded structural diagram of the assembly of the longitudinally reinforcing tube, the transversely reinforcing rod, the square locking member, and the corner reinforcing member of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the lower end cap of the present invention;

[0027] Figure 10 This is a three-dimensional structural schematic diagram of the corner reinforcement component of the present invention;

[0028] Figure 11 This is a schematic diagram of the assembly of the longitudinally reinforcing pipe, the transversely reinforcing rod, and the box unit of the present invention;

[0029] Figure 12 This is a schematic diagram of the three-dimensional structure of the entire assembly of the present invention.

[0030] In the diagram: 1. Base plate unit; 101. Rectangular base plate; 102. Reinforcing protrusion; 2. Partition plate unit; 201. Intermediate vertical plate; 202. Diagonal brace plate; 203. Intermediate top plate; 204. Central through pipe; 205. Manhole pipe; 209. Slot; 3. Web plate unit; 301. Corrugated web plate; 302. Side top plate; 4. Intermediate reinforcing assembly; 401. Longitudinal reinforcing pipe; 402. Transverse reinforcing rod; 403. Nut; 404. Upper end cap; 405. Lower end cap; 406. Support block; 407. U-shaped connector; 408. Horizontal plate; 409. Reinforcing diagonal brace block; 410. Screw; 411. Transverse arc groove; 412. Longitudinal arc groove. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example:

[0033] Please see Figures 1-12 The present invention provides a technical solution:

[0034] A long-span continuous corrugated web steel-concrete composite box girder structure includes box units, each box unit comprising a bottom plate unit 1, web units 3 symmetrically distributed longitudinally on both sides of the upper end of the bottom plate unit 1, and several sets of equally spaced and transversely distributed partition units 2 provided on the upper end of the bottom plate unit 1; a steel top plate is laid on the upper end of the box unit, and a steel reinforcement skeleton is provided on the upper end of the steel top plate; after several sets of box units are assembled and fixed, the steel reinforcement skeleton is cast into a whole using concrete.

[0035] After the large-span continuous corrugated web steel-concrete composite box girder structure is manufactured in the factory and passes pre-assembly inspection, it is transported to the site in segments. First, the steel beam segments are erected by placing temporary piers, temporary supports, and permanent supports at the pier tops of the central supports to complete the assembly of the steel beams. Next, the end crossbeams, box girder crossbeams, and cantilever steel plates are connected. Micro-expansion concrete is poured for the pier tops, pier top crossbeams, the bottom of the beams on both sides, and the end crossbeams. Then, the formwork is erected, and the first-stage bridge deck concrete is poured. After the concrete reaches the required strength, the internal prestressed steel tendons are tensioned. The second-stage bridge deck concrete is then poured. After the temporary piers are removed, the internal prestressed steel tendons are tensioned again, followed by the external prestressed steel tendons. Finally, the bridge deck paving and ancillary works are completed.

[0036] The base plate unit 1 includes a rectangular base plate 101 and several sets of reinforcing protrusions 102 that are equally spaced and longitudinally distributed at the middle of the upper end of the rectangular base plate 101.

[0037] The rectangular base plate 101 has a simple structure and a large bearing area, which can realize the uniform bearing and transfer of loads. As the bottom foundation of the box girder, it can stably support all the structures above and is suitable for the heavy load requirements of large-span projects.

[0038] Strengthening the longitudinally evenly spaced distribution of the protrusions 102 improves the longitudinal stiffness and deformation resistance of the base plate unit 1 itself, preventing the base plate unit 1 from flexing due to its large span. On the other hand, it cooperates with the slots 209 of the partition unit 2 to achieve rapid positioning and splicing, simplifying the installation process, while enhancing the tightness of the connection between the base plate unit 1 and the partition unit 2.

[0039] Web unit 3 includes a corrugated web 301 fixed to the upper end of bottom plate unit 1 and a side top plate 302 fixed to the top of corrugated web 301.

[0040] Compared to traditional flat webs, the corrugated structure of the corrugated web 301 significantly improves the shear strength, buckling resistance, and toughness of the web. When subjected to lateral loads and shear forces, the corrugated folds can disperse stress, avoid local buckling, and buffer load impacts, reduce structural fatigue damage, and extend service life. In addition, the corrugated structure does not require additional stiffening ribs, which can save material usage and reduce manufacturing costs. The side top plate 302 is fixedly connected to the middle top plate 203 of the diaphragm unit 2, forming the top load-bearing surface of the box girder, and at the same time providing connection support points for corner reinforcements, helping to improve the stability of the corner parts and realizing the coordinated force bearing of the web unit 3 and the diaphragm unit 2.

[0041] The upper end of the base plate unit 1 is provided with several sets of equally spaced and laterally distributed partition units 2, and the connection between the base plate unit 1 and the partition units 2 is (the reinforcing protrusion 102 engages with the slot 209):

[0042] (1) Precise positioning: The snap-fit ​​mechanism enables rapid positioning of both components, ensuring the installation spacing and positional accuracy of the partition unit 2 on the base plate unit 1, avoiding lateral and longitudinal offsets, and ensuring the overall forming accuracy of the box unit.

[0043] (2) Firm connection: The snap-fit ​​structure increases the contact area between the two, enhances the tightness of the connection, avoids loosening or displacement at the splice, and ensures that the load can be smoothly transferred;

[0044] (3) Easy installation: No additional fasteners are required, simplifying the installation process, improving construction efficiency, and facilitating later disassembly, maintenance or structural adjustment.

[0045] The partition unit 2 includes a central vertical plate 201, symmetrically arranged diagonal bracing plates 202 on both sides of the central vertical plate 201, and a central top plate 203 fixed to the top of the central vertical plate 201 and the diagonal bracing plates 202. The central top plate 203 is fixed to the inner wall of the side top plate 302. The partition unit 2 is connected to the web unit 3 (the central top plate 203 is fixed to the side top plate 302).

[0046] (1) Seamless connection: The partition unit 2 and the web unit 3 are integrated to form a complete box-type load-bearing system, ensuring that the load can be smoothly transferred between the two and avoiding stress concentration at the connection.

[0047] (2) Improve overall integrity: Connect the transversely distributed partition unit 2 with the longitudinally distributed web unit 3 to improve the overall coherence of the box unit and enhance its resistance to deformation.

[0048] (3) Auxiliary load bearing: Increase the top load bearing area, help disperse the top load, reduce the stress on the single structure, and extend the service life of the structure.

[0049] The bottom of the middle upright plate 201 and the diagonal brace plate 202 are provided with several sets of equally spaced slots 209, and the reinforcing protrusions 102 are inserted into the corresponding slots 209.

[0050] The intermediate vertical plate 201 serves as the core load-bearing structure of the partition unit 2, vertically bearing the top load and providing a foundation for distributing the lateral load. It also separates the internal space of the box unit, preventing internal structural interference. The diagonal bracing plates 202 are symmetrically arranged on both sides of the intermediate vertical plate 201, forming a stable triangular support structure. This triangular structure has extremely strong resistance to deformation, distributing the vertical load borne by the intermediate vertical plate 201 to the web units 3 on both sides, reducing the stress on a single structure and preventing bending deformation of the intermediate vertical plate 201. The intermediate top plate 203 connects the partition unit 2 and the web unit 3, achieving a seamless connection between them. It also expands the top load-bearing area, further distributing the top load. The central through-tube 204 passes through the longitudinal reinforcing tube 401, eliminating the need for additional openings in the partition unit 2, thus avoiding damage to the structural integrity of the partition unit 2. Simultaneously, it ensures precise positioning of the longitudinal reinforcing tube 401, guaranteeing the reinforcement effect.

[0051] Manhole 205 provides a convenient passage for the construction and maintenance of the internal structure. Internal maintenance can be completed without disassembling the external structure of the box girder, reducing maintenance costs and improving maintenance efficiency. The slot 209 is used to precisely match the reinforcing protrusion 102 of the bottom plate unit 1 to achieve rapid positioning and installation of the partition unit 2, ensuring installation accuracy, while enhancing the connection between the two and preventing loosening or displacement at the splice.

[0052] The box unit is equipped with an intermediate reinforcing component 4. The intermediate reinforcing component 4 includes a longitudinal reinforcing tube 401 that runs through several sets of partition units 2 in the center, a transverse reinforcing rod 402 that runs through and is fixed between the web units 3, a square locking member that is fixed at the connection between the longitudinal reinforcing tube 401 and the transverse reinforcing rod 402, and corner reinforcing members that are connected at the four corners of the square locking member. The end of the corner reinforcing member is connected between the side top plate 302 and the bottom plate unit 1.

[0053] Manhole pipes 205 are symmetrically provided on both sides between the middle vertical plate 201 and the diagonal brace plate 202, and a central through pipe 204 for passing through the longitudinal reinforcing pipe 401 is provided in the middle between the middle vertical plate 201 and the diagonal brace plate 202.

[0054] The longitudinal reinforcing pipe 401 passes through several sets of partition units 2 to realize the longitudinal linkage of partition units 2, improve the longitudinal integrity and bending resistance of the box unit, and avoid longitudinal deformation and cracking of the box girder in large-span scenarios. The transverse reinforcing rod 402 passes through the longitudinal reinforcing pipe 401, and the two ends of the transverse reinforcing rod 402 extend through the corrugated web 301 and are locked and fixed by nuts 403.

[0055] The transverse reinforcing member 402 penetrates the web unit 3 and intersects with the longitudinal reinforcing tube 401 to form a crisscrossing reinforcing network, which tightly connects the various modules of the box girder unit, realizes the full-area distribution of load, and greatly improves the overall load-bearing capacity and deformation resistance of the box girder. The nut 403 locks the two ends of the transverse reinforcing member 402 to the corrugated web 301, which is firmly connected, easy to disassemble, and convenient for later maintenance and structural adjustment. At the same time, it ensures that the transverse reinforcing member 402 and the web unit 3 are subjected to coordinated force. The square locking part includes an upper end cap 404 and a lower end cap 405 fixed above and below the connection between the longitudinal reinforcing tube 401 and the transverse reinforcing member 402. The upper end cap 404 and the lower end cap 405 have the same shape, and both the upper end cap 404 and the lower end cap 405 are provided with a longitudinal arc groove 412 and a transverse arc groove 411. The longitudinal reinforcing tube 401 and the transverse reinforcing member 402 are respectively locked in the longitudinal arc groove 412 and the transverse arc groove 411.

[0056] The upper end cover 404 and the lower end cover 405 (square locking parts) respectively engage the longitudinal reinforcing tube 401 and the transverse reinforcing rod 402 through the longitudinal arc groove 412 and the transverse arc groove 411, accurately positioning the intersection of the two and locking the connection to prevent loosening, ensuring that the longitudinal and transverse reinforcing structures work together to transfer the load and improve the reinforcement effect. The corner reinforcing parts include a U-shaped connector 407 that is locked at the corner of the upper end cover 404 and the lower end cover 405, a support block 406 fixed in the middle of the U-shaped connector 407 by a horizontal plate 408, and a reinforcing diagonal brace 409 connecting the support block 406 and the U-shaped connector 407. The reinforcing diagonal brace 409 is fixed between the side top plate 302 and the bottom plate unit 1.

[0057] The U-shaped connector 407 enables quick connection between the corner reinforcement and the square locking component. The support block 406 and the reinforcing diagonal brace block 409 connect the side top plate 302 and the bottom plate unit 1, filling the weak stress points at the corner of the box girder and preventing cracking and deformation at the corner due to concentrated load. At the same time, it enhances the connection between the square locking component and the box unit. The U-shaped connector 407 is movably connected to the corner of the upper end cover 404 and the lower end cover 405 by a screw 410, and the upper end cover 404 and the lower end cover 405 are fixed by the screw 410.

[0058] The screw 410 fixes the U-shaped connector 407 to the upper end cover 404 and the lower end cover 405, ensuring a reliable connection, easy disassembly, and convenient installation and maintenance of the corner reinforcement.

[0059] (1) Connection between longitudinal reinforcing pipe 401 and partition unit 2 (through central through pipe 204): without damaging the structure of partition unit 2, ensuring the load-bearing performance of partition unit 2, and at the same time achieving precise positioning of longitudinal reinforcing pipe 401, ensuring that it can effectively connect all partition units 2 in series, and improving longitudinal integrity.

[0060] (2) Connection between transverse reinforcing member 402 and longitudinal reinforcing tube 401 and web unit 3 (through fit + locking with nut 403): The connection is firm and can realize the coordinated force of transverse reinforcing member 402 and the two, transfer the lateral load borne by web unit 3 to longitudinal reinforcing tube 401, and then distribute it to each partition unit 2, so as to realize the full-area load distribution; at the same time, locking with nut 403 is convenient for disassembly and maintenance;

[0061] (3) Connection between square locking parts and longitudinal reinforcing tube 401 and transverse reinforcing rod 402 (arc groove engagement): tight engagement and precise positioning, avoiding loosening and relative displacement at cross-connection points, ensuring the coordinated work of longitudinal and transverse reinforcing structures, improving the reinforcing effect, and dispersing stress at the connection points;

[0062] (4) Connection between corner reinforcement and square locking part, side top plate 302, and bottom plate unit 1 (U-shaped snap-fit ​​+ screw 410 fixation): fill the weak point of corner stress, enhance the stability and load-bearing capacity of corner part, and at the same time, tightly connect the middle reinforcement component 4 with the main structure of box girder to improve the continuity and anti-deformation capacity of the overall structure. The screw 410 fixation facilitates installation and later maintenance.

[0063] Specifically, when using it:

[0064] This invention relates to a large-span continuous corrugated web steel-concrete composite box girder structure. Its core design utilizes "modular splicing + multi-directional reinforcement and synergy" to achieve high strength, high stability, and deformation resistance, thus meeting the load-bearing requirements of large-span projects. The overall working principle revolves around four core aspects: "foundation bearing capacity - zoned stress distribution - enhanced deformation resistance - convenient assembly." The various structural elements work synergistically, as detailed below:

[0065] (I) Foundation bearing capacity and integral forming principle:

[0066] The overall load-bearing foundation of the box unit is formed by splicing together three core modules: bottom plate unit 1, web plate unit 3, and partition plate unit 2, forming a closed box-shaped force-bearing system, which provides a basic framework for bearing vertical and horizontal loads in large-span scenarios.

[0067] The base plate unit 1 serves as the bottom load-bearing carrier of the entire box unit. The rectangular base plate 101 directly bears the reaction force of the supporting structure below and transmits the load of the structure above. Several sets of reinforcing protrusions 102 distributed longitudinally at the upper middle part of the base plate unit 1 are precisely engaged with the slots 209 at the bottom of the partition unit 2 and then welded to fix them, so as to realize the positioning and connection of the base plate unit 1 and the partition unit 2, ensure the integrity of the connection between the two, and avoid displacement or loosening at the splicing point.

[0068] The web plate unit 3 is symmetrically fixed on both sides of the upper end of the bottom plate unit 1 and distributed longitudinally. The corrugated web plate 301 vertically bears the load of the bottom plate unit 1 and forms the side protection and lateral load-bearing structure of the box unit. The side top plate 302 fixed at the top is fixedly connected to the middle top plate 203 at the top of the partition unit 2, and together they form the top load-bearing surface of the box girder. Finally, through the splicing of the bottom plate unit 1, web plate unit 3 and partition unit 2, a complete box structure is formed, so as to achieve the uniform transfer of load and avoid local stress concentration.

[0069] (II) Principle of Zoned Force and Load Dispersion:

[0070] 1. Stress distribution of partition unit 2: Partition units 2 are distributed horizontally at equal intervals on the upper end of the bottom plate unit 1. Each partition unit 2 consists of a middle vertical plate 201, two side diagonal bracing plates 202 and a top middle plate 203. The middle vertical plate 201 vertically bears the top load, and the two side diagonal bracing plates 202 form a triangular support structure, which distributes the vertical load borne by the middle vertical plate 201 to both sides to the web plate unit 3, and then from the web plate unit 3 to the bottom plate unit 1, realizing the graded distribution of load and reducing the stress pressure on a single structure.

[0071] 2. Stress optimization of corrugated web 301: Web unit 3 adopts corrugated web 301 structure. Compared with traditional flat web, corrugated structure can effectively improve the shear strength and buckling resistance of web. When subjected to lateral loads and vertical shear forces, corrugated folds can disperse stress and avoid local buckling deformation of web. At the same time, the toughness of corrugated structure can buffer load impact and reduce structural fatigue damage.

[0072] Due to the folding effect of the corrugated web 301, the longitudinal stiffness of the box unit is very small and it basically does not resist axial force, thereby avoiding the absorption of longitudinal prestress applied to the flange and greatly improving the application efficiency of prestress.

[0073] 3. Anti-deformation function of intermediate reinforcing component 4: As the core reinforcing structure, intermediate reinforcing component 4 runs through the entire box unit. The longitudinal reinforcing pipe 401 runs through several sets of partition units 2 in the center, realizing the longitudinal linkage of partition units 2, avoiding lateral displacement of multiple sets of partition units 2, and improving the longitudinal integrity and bending resistance of the box unit.

[0074] The transverse reinforcing member 402 passes through the web unit 3 and crosses with the longitudinal reinforcing tube 401 to form a crisscrossing reinforcing network, which tightly connects the web unit 3, the partition unit 2, and the bottom plate unit 1 into a whole, realizing the full-area distribution of load and further improving the load-bearing limit of the box unit.

[0075] (III) Structural positioning and locking principle:

[0076] 1. Splicing and positioning: The reinforcing protrusion 102 of the base plate unit 1 engages with the slot 209 of the partition unit 2 to achieve rapid positioning of the base plate unit 1 and the partition unit 2, ensuring the installation accuracy of the partition unit 2 on the base plate unit 1 and avoiding lateral and longitudinal offset.

[0077] The middle top plate 203 of the partition unit 2 is fixedly connected to the side top plate 302 of the web unit 3 to achieve the positioning and fixing of the partition unit 2 and the web unit 3, and to ensure the molding accuracy of the box unit.

[0078] 2. Cross locking: The transverse reinforcing rod 402 passes through the longitudinal reinforcing tube 401, and after passing through the corrugated web 301 at both ends, it is locked and fixed with nuts 403, so as to achieve double fixing of the transverse reinforcing rod 402 to the web unit 3 and the longitudinal reinforcing tube 401;

[0079] The square locking parts (upper end cover 404, lower end cover 405) engage the longitudinal reinforcing tube 401 and the transverse reinforcing rod 402 respectively through the longitudinal arc groove 412 and the transverse arc groove 411, locking the intersection of the two to prevent the connection from loosening and to ensure the coordinated force of the longitudinal and transverse reinforcing structures.

[0080] 3. Corner reinforcement: The corner reinforcement is snapped into the corner of the upper end cover 404 and the lower end cover 405 by a U-shaped connector 407 and fixed by a screw 410. The support block 406 and the reinforcing diagonal brace 409 at the end are connected between the side top plate 302 and the bottom plate unit 1 to reinforce the corner of the box unit, fill the weak point between the side top plate 302 and the bottom plate unit 1, avoid cracking and deformation at the corner due to load concentration, and further improve the stability of the overall structure.

[0081] (iv) Principles for achieving ease of operation and maintenance:

[0082] Manhole pipes 205 are symmetrically provided between the middle vertical plate 201 and the diagonal brace plate 202 of the partition unit 2. The manhole pipes 205 provide a passage for construction and maintenance personnel to enter the interior of the box unit, which facilitates the installation, inspection and maintenance of the internal structure such as the middle reinforcing component 4 and the partition unit 2.

[0083] The central through-pipe 204 is used to penetrate the longitudinal reinforcing pipe 401, which not only achieves the precise installation and positioning of the longitudinal reinforcing pipe 401, but also avoids damage to the structure of the partition unit 2, thus balancing the reinforcement effect and structural integrity.

[0084] This invention has a strong load-bearing capacity: through modular splicing and crisscrossing reinforcement structure, it achieves graded and distributed loads throughout the entire area, improving the shear, bending and buckling resistance of the box girder, adapting to the heavy load requirements of large-span projects, and significantly improving the load-bearing limit;

[0085] This invention has high stability: the various structures are firmly connected and accurately positioned, forming a complete integrated box-type force-bearing system, avoiding local structural loosening and displacement, and has strong resistance to deformation and impact, which can effectively cope with complex loads in large-span scenarios.

[0086] This invention is easy to construct: its modular design and convenient connection methods such as snap-fit ​​and locking simplify the installation process, improve construction efficiency, and reduce construction costs.

[0087] The present invention is easy to operate and maintain: the manhole tube 205 provides a convenient passage for the operation and maintenance of the internal structure, and the various connecting structures are easy to disassemble, which facilitates later inspection, maintenance and structural adjustment;

[0088] This invention is economical: the corrugated web 301 does not require additional stiffening ribs, saving material usage; the modular design reduces processing and transportation costs; at the same time, it has high structural stability and long service life, reducing later maintenance costs.

[0089] This invention has wide applicability: the number and spacing of the box unit and the partition unit 2 can be flexibly adjusted according to the actual size of large-span projects to adapt to engineering scenarios with different spans and different load requirements.

[0090] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long-span continuous corrugated web steel-concrete composite box girder structure, comprising box units, characterized in that: The box unit includes a bottom plate unit, a web plate unit that is symmetrically distributed longitudinally on both sides of the upper end of the bottom plate unit, and a number of equally spaced and transversely distributed partition plate units provided at the upper end of the bottom plate unit. The web unit includes a corrugated web fixed to the upper end of the base plate unit and a side top plate fixed to the top of the corrugated web. The upper end of the base plate unit is provided with several sets of partition units that are equally spaced and distributed laterally. Each partition unit includes a middle vertical plate, diagonal bracing plates symmetrically arranged on both sides of the middle vertical plate, and a middle top plate fixed to the top of the middle vertical plate and the diagonal bracing plates. The middle top plate is fixed to the inner wall of the side top plate. The box unit is equipped with an intermediate reinforcing component. The intermediate reinforcing component includes a longitudinal reinforcing tube that runs through several sets of partition units in the center, a transverse reinforcing rod that runs through and is fixed between the web units, a square locking member that is fixed at the connection between the longitudinal reinforcing tube and the transverse reinforcing rod, and corner reinforcing members that are connected at the four corners of the square locking member. The end of the corner reinforcing member is connected between the side top plate and the bottom plate unit.

2. The large-span continuous corrugated web steel-concrete composite box girder structure according to claim 1, characterized in that: The base plate unit includes a rectangular base plate and several sets of reinforcing protrusions that are evenly spaced and longitudinally distributed at the upper center of the rectangular base plate.

3. The large-span continuous corrugated web steel-concrete composite box girder structure according to claim 2, characterized in that: The bottom of the intermediate vertical plate and the diagonal brace plate are provided with several sets of equally spaced slots, and the reinforcing protrusions are inserted into the corresponding slots.

4. The large-span continuous corrugated web steel-concrete composite box girder structure according to claim 1, characterized in that: Manholes are symmetrically provided on both sides between the intermediate vertical plate and the diagonal brace, and a central through-hole for passing through the longitudinal reinforcing pipe is provided in the middle between the intermediate vertical plate and the diagonal brace.

5. A large-span continuous corrugated web steel-concrete composite box girder structure according to claim 1, characterized in that: The transverse reinforcing rod is passed through the longitudinal reinforcing tube, and the two ends of the transverse reinforcing rod extend through the corrugated web and are locked and fixed with nuts.

6. The long-span continuous corrugated web steel-concrete composite box girder structure according to claim 1, characterized in that: The square locking component includes an upper end cap and a lower end cap fixed above and below the connection between the longitudinal reinforcing tube and the transverse reinforcing rod. The upper end cap and the lower end cap have the same shape, and both the upper end cap and the lower end cap are provided with a longitudinal arc groove and a transverse arc groove. The longitudinal reinforcing tube and the transverse reinforcing rod are respectively locked in the longitudinal arc groove and the transverse arc groove.

7. A large-span continuous corrugated web steel-concrete composite box girder structure according to claim 6, characterized in that: The corner reinforcement includes a U-shaped connector that is snapped into the corner of the upper and lower end caps, a support block fixed in the middle of the U-shaped connector by a horizontal plate, and a reinforcing diagonal brace connecting the support block and the U-shaped connector. The reinforcing diagonal brace is fixed between the side top plate and the bottom plate unit.

8. A large-span continuous corrugated web steel-concrete composite box girder structure according to claim 7, characterized in that: The U-shaped connector is movably connected to the corner of the upper and lower end covers using a screw, and the upper and lower end covers are fixed by the screw.

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