Large-span continuous corrugated web steel-concrete combined box girder structure

Abstract

The invention relates to the technical field of bridge structures, and discloses a large-span continuous corrugated web steel-concrete combined box girder structure which is characterized in that a box body unit comprises a bottom plate unit, web units which are symmetrically and longitudinally distributed on two sides of the upper end of the bottom plate unit, and a plurality of groups of partition plate units which are transversely distributed at equal intervals and are arranged at the upper end of the bottom plate unit; middle reinforcing assemblies are arranged in the box body units; the middle reinforcing assembly comprises a longitudinal reinforcing pipe fitting penetrating through the multiple sets of partition plate units in the middle, transverse reinforcing rod pieces fixed between the web plate units in a penetrating mode, square locking pieces fixed to the connecting positions of the longitudinal reinforcing pipe fitting and the transverse reinforcing rod pieces and corner reinforcing pieces connected to the four corners of the square locking pieces. According to the corrugated web, additional stiffening ribs are not needed, the shear resistance, buckling resistance and toughness are improved, and fatigue damage is reduced; the criss-cross middle reinforcing assemblies form a global reinforcing network, the overall bearing capacity and deformation resistance of the box girder are improved, local stress concentration is avoided, and the service life of the bridge is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge structure, in particular to a large-span continuous corrugated web steel-concrete composite box girder structure. BACKGROUND

[0002] In the field of bridge engineering large-span construction, steel-concrete composite box girder is widely used in cross-sea, cross-river and urban viaduct engineering due to its advantages of steel tensile resistance and concrete compressive resistance. In view of the problem of easy cracking of the traditional concrete bridge web, promoting the construction of corrugated steel web composite structure bridge is a good opportunity to improve the quality of highway bridges and promote the transformation and upgrading of highways. However, the existing large-span composite box girder still has many shortcomings: the traditional flat web needs to add a large number of stiffeners to resist buckling, which requires a large amount of material and complex processing; the splicing of each unit of the box girder relies on fasteners, which is prone to loose connection; the overall anti-buckling and anti-deformation capacity is insufficient, which is difficult to adapt to the demand of large-span heavy load, and is prone to local stress concentration, which shortens the service life of the bridge, and an optimized structure is needed to solve the above problems. Therefore, we introduce a large-span continuous corrugated web steel-concrete composite box girder structure. SUMMARY

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

[0004] To achieve the above purpose, the present application provides the following technical scheme: A large-span continuous corrugated web steel-concrete composite box girder structure, comprising a box unit, the box unit comprising a bottom plate unit, web units symmetrically distributed on both sides of the upper end of the bottom plate unit in a longitudinal direction, and a plurality of groups of partition plate units equally spaced and distributed in a transverse direction provided at the upper end of the bottom plate unit; The web unit comprises a corrugated web fixed at the upper end of the bottom plate unit and a side edge top plate fixed at the top of the corrugated web; The upper end of the bottom plate unit is provided with a plurality of groups of partition plate units equally spaced and distributed in a transverse direction, the partition plate unit comprises a middle stand plate, a diagonal bracing plate symmetrically arranged on both sides of the middle stand plate, and a middle top plate fixed at the top of the middle stand plate and the diagonal bracing plate, and the middle top plate is fixed to the inner wall of the side edge top plate; The box unit is internally provided with a middle reinforcing assembly, the middle reinforcing assembly comprises a longitudinal reinforcing pipe piece penetrating through a plurality of groups of partition plate units, a transverse reinforcing rod piece penetrating and fixed between the web units, a square locking piece fixed at the connection between the longitudinal reinforcing pipe piece and the transverse reinforcing rod piece, and a corner reinforcing piece connected at the four corners of the square locking piece, and the corner reinforcing piece is connected between the side edge top plate and the bottom plate unit.

[0005] Preferably, the bottom plate unit comprises a rectangular bottom plate and a plurality of groups of reinforcing protrusions equidistantly and longitudinally distributed in the middle of the upper end of the rectangular bottom plate.

[0006] Preferably, the bottom of the intermediate vertical plate and the inclined bracing plate is provided with a plurality of groups of equidistantly arranged clamping grooves, and the reinforcing protrusions are clamped into the corresponding clamping grooves.

[0007] Preferably, manhole pipes are symmetrically arranged on both sides between the intermediate vertical plate and the inclined bracing plate, and a middle through pipe for penetrating a longitudinal reinforcing pipe element is arranged in the middle between the intermediate vertical plate and the inclined bracing plate.

[0008] Preferably, the transverse reinforcing rod element penetrates through the longitudinal reinforcing pipe element, and the two ends of the transverse reinforcing rod element extend out through the corrugated web and are fixed by nuts.

[0009] Preferably, the square locking element comprises an upper end cover and a lower end cover fixed above and below the connection between the longitudinal reinforcing pipe element and the transverse reinforcing rod element, the upper end cover and the lower end cover are identical in shape, and the upper end cover and the lower end cover are both provided with a longitudinal arc-shaped groove and a transverse arc-shaped groove, and the longitudinal reinforcing pipe element and the transverse reinforcing rod element are clamped in the longitudinal arc-shaped groove and the transverse arc-shaped groove, respectively.

[0010] Preferably, the corner reinforcing element comprises a U-shaped connector clamped at the corner of the upper end cover and the lower end cover, a support block fixed by a horizontal plate in the middle of the U-shaped connector, and a reinforcing inclined support block connected between the support block and the U-shaped connector. The reinforcing inclined support block is fixed between the side top plate and the bottom plate unit.

[0011] Preferably, the U-shaped connector is movably connected to the corner of the upper end cover and the lower end cover by a screw rod, and the upper end cover and the lower end cover are fixed by the screw rod.

[0012] Compared with the prior art, the corrugated web of the present application does not require additional stiffening ribs, saving materials and reducing manufacturing costs, while improving shear, buckling resistance and toughness, reducing fatigue damage; modular splicing and clamping positioning simplify the construction process; the longitudinal and transverse intersecting intermediate reinforcing assemblies form a global reinforcing network, improving the overall bearing capacity and anti-deformation ability of the box girder, adapting to large-span heavy load requirements, achieving hierarchical global dispersion of loads, avoiding local stress concentration, and prolonging the service life of the bridge. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is an exploded view of the overall assembly of the present application; Figure 2 is a perspective view of the bottom plate unit of the present application; Figure 3 is a perspective view of the partition plate unit of the present application; Figure 4The perspective structural schematic diagram of the assembled web plate unit, the partition plate unit and the bottom plate unit of the present application; Figure 5 The perspective structural schematic diagram of the web plate unit of the present application; Figure 6 The perspective structural schematic diagram of the assembled web plate unit, the partition plate unit and the bottom plate unit of the present application; Figure 7 The perspective structural schematic diagram of the intermediate reinforcing assembly of the present application; Figure 8 The exploded structural schematic diagram of the assembled longitudinal reinforcing pipe, the transverse reinforcing rod, the square locking piece and the corner reinforcing piece of the present application; Figure 9 The perspective structural schematic diagram of the lower end cover of the present application; Figure 10 The perspective structural schematic diagram of the corner reinforcing piece of the present application; Figure 11 The structural schematic diagram of the assembled longitudinal reinforcing pipe, the transverse reinforcing rod and the box unit of the present application; Figure 12 The perspective structural schematic diagram of the present application after the overall assembly.

[0014] In the figure: 1, the bottom plate unit; 101, the rectangular bottom plate; 102, the reinforcing protrusion; 2, the partition plate unit; 201, the intermediate vertical plate; 202, the inclined bracing plate; 203, the intermediate top plate; 204, the middle through pipe; 205, the manhole pipe; 209, the clamping groove; 3, the web plate unit; 301, the wave-shaped web plate; 302, the side edge top plate; 4, the intermediate reinforcing assembly; 401, the longitudinal reinforcing pipe; 402, the transverse reinforcing rod; 403, the nut; 404, the upper end cover; 405, the lower end cover; 406, the supporting block; 407, the U-shaped connecting head; 408, the horizontal plate; 409, the reinforcing inclined bracing block; 410, the screw rod; 411, the transverse arc-shaped groove; 412, the longitudinal arc-shaped groove. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0016] Embodiment: Please refer to Figures 1-12 The present application provides a technical solution: 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.

[0017] 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.

[0018] 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.

[0019] 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. 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.

[0020] 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. 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.

[0021] The upper end of the bottom plate unit 1 is provided with a plurality of groups of equally spaced and transversely distributed partition plate units 2, and the connection (the reinforcing protrusion 102 is clamped into the clamping groove 209) between the bottom plate unit 1 and the partition plate unit 2 is as follows: (1) Accurate positioning: The clamping cooperation can realize the rapid positioning of the two, ensure the installation spacing and position accuracy of the partition plate unit 2 on the bottom plate unit 1, avoid transverse and longitudinal deviation, and ensure the overall forming accuracy of the box unit; (2) Firm connection: The clamping structure increases the contact area of the two, enhances the connection tightness, avoids loosening and displacement at the splicing position, and ensures smooth load transmission; (3) Convenient installation: No additional fasteners are needed, the installation process is simplified, the construction efficiency is improved, and the box unit is convenient for disassembly, maintenance or structure adjustment in the later period.

[0022] The partition plate unit 2 includes a middle vertical plate 201, a plurality of groups of oblique support plates 202 symmetrically arranged on both sides of the middle vertical plate 201, and a middle top plate 203 fixed at the top of the middle vertical plate 201 and the oblique support plate 202. The middle top plate 203 is fixed to the inner wall of the side top plate 302, and the connection (the middle top plate 203 is fixed to the side top plate 302) between the partition plate unit 2 and the web plate unit 3 is as follows: (1) Seamless connection: The partition plate unit 2 and the web plate unit 3 are integrally connected to form a complete box-type stress system, ensuring smooth load transmission between the two, and avoiding stress concentration at the connection position; (2) Improve the integrity: The transversely distributed partition plate unit 2 and the longitudinally distributed web plate unit 3 are tightly connected to improve the overall continuity of the box unit and enhance the anti-deformation ability; (3) Auxiliary force bearing: The top force bearing area is expanded to assist in dispersing the top load, reduce the stress pressure of a single structure, and prolong the service life of the structure.

[0023] The bottom of the middle vertical plate 201 and the oblique support plate 202 is provided with a plurality of groups of equally spaced clamping grooves 209, and the reinforcing protrusion 102 is clamped into the corresponding clamping groove 209.

[0024] The intermediate vertical plate 201 is the core load-bearing structure of the partition plate unit 2, vertically receives the top load, provides a basis for the dispersion of lateral load, separates the internal space of the box unit, avoids mutual interference of internal structures, the inclined bracing plate 202 is symmetrically arranged on both sides of the intermediate vertical plate 201 to form a triangular stable support structure, the triangular structure has strong anti-deformation ability, can disperse the vertical load borne by the intermediate vertical plate 201 to both sides of the web plate unit 3, reduces the stress of a single structure, avoids bending deformation of the intermediate vertical plate 201, the intermediate top plate 203 is used for connecting the partition plate unit 2 and the web plate unit 3 to realize seamless connection of the two, expand the top load-bearing area, and assist in dispersing the top load, the middle through pipe 204 is used for penetrating the longitudinal reinforcing pipe 401, without additional holes on the partition plate unit 2, the structural integrity of the partition plate unit 2 is avoided, and the precise positioning of the longitudinal reinforcing pipe 401 is realized, and the reinforcing effect is guaranteed.

[0025] The manhole pipe 205 provides a convenient channel for the construction and operation and maintenance of the internal structure, without disassembling the external structure of the box girder, the internal maintenance can be completed, the operation and maintenance cost is reduced, and the operation and maintenance efficiency is improved, the clamping groove 209 is used for precise cooperation with the reinforcing protrusion 102 of the bottom plate unit 1, the quick positioning and installation of the partition plate unit 2 is realized, the installation precision is ensured, the connection firmness of the two is enhanced, and loosening and displacement at the splicing position are avoided.

[0026] The box unit is internally provided with an intermediate reinforcing assembly 4, the intermediate reinforcing assembly 4 comprises longitudinal reinforcing pipes 401 penetrating a plurality of groups of partition plate units 2, transverse reinforcing rod members 402 penetrating and fixed between the web plate units 3, square locking members fixed at the connection positions of the longitudinal reinforcing pipes 401 and the transverse reinforcing rod members 402, and corner reinforcing members connected at four corners of the square locking members, and the corner reinforcing members are connected between the side top plates 302 and the bottom plate units 1.

[0027] The manhole pipes 205 are symmetrically arranged between the intermediate vertical plate 201 and the inclined bracing plate 202, and the middle through pipe 204 is arranged in the middle of the intermediate vertical plate 201 and the inclined bracing plate 202.

[0028] The longitudinal reinforcing pipes 401 penetrate a plurality of groups of partition plate units 2 to realize longitudinal linkage of the partition plate units 2, improve the longitudinal integrity and anti-bending ability of the box unit, and avoid longitudinal deformation and cracking of the box girder in a large-span scene, the transverse reinforcing rod members 402 penetrate the longitudinal reinforcing pipes 401, and the two ends of the transverse reinforcing rod members 402 are locked and fixed by the nuts 403 after being stretched out through the corrugated web plates 301.

[0029] The transverse reinforcing rod 402 penetrates the web unit 3 and is cross-connected with the longitudinal reinforcing pipe 401, forming a crisscross reinforcing network, tightly connecting each module of the box unit, realizing global dispersion of load, greatly improving the overall bearing capacity and anti-deformation capacity of the box girder, and the nut 403 locks and fixes the two ends of the transverse reinforcing rod 402 on the corrugated web 301, the connection is firm, the disassembly is convenient, the post-maintenance and structural adjustment are facilitated, and at the same time, the cooperative stress of the transverse reinforcing rod 402 and the web unit 3 is ensured, the square locking piece includes an upper end cover 404 and a lower end cover 405 fixed on the upper and lower sides of the connection between the longitudinal reinforcing pipe 401 and the transverse reinforcing rod 402, the upper end cover 404 and the lower end cover 405 are consistent in shape, and longitudinal arc-shaped grooves 412 and transverse arc-shaped grooves 411 are arranged on the upper end cover 404 and the lower end cover 405, and the longitudinal reinforcing pipe 401 and the transverse reinforcing rod 402 are respectively clamped in the longitudinal arc-shaped grooves 412 and the transverse arc-shaped grooves 411.

[0030] The upper end cover 404 and the lower end cover 405 (square locking piece) are respectively clamped with the longitudinal reinforcing pipe 401 and the transverse reinforcing rod 402 through the longitudinal arc-shaped grooves 412 and the transverse arc-shaped grooves 411, accurately positioning the cross-connection place of the two, locking the connection place at the same time, avoiding loosening, ensuring the cooperative load transmission of the longitudinal and transverse reinforcing structures, improving the reinforcing effect, the corner reinforcing piece includes a U-shaped connector 407 clamped at the corner of the upper end cover 404 and the lower end cover 405, a support block 406 fixed by a horizontal plate 408 in the middle of the U-shaped connector 407, and a reinforcing inclined support block 409 connected between the support block 406 and the U-shaped connector 407, and the reinforcing inclined support block 409 is fixed between the side top plate 302 and the bottom plate unit 1.

[0031] The U-shaped connector 407 realizes the quick connection of the corner reinforcing piece and the square locking piece, the support block 406 and the reinforcing inclined support block 409 connect the side top plate 302 and the bottom plate unit 1, fill the stress weak point of the corner part of the box girder, avoid cracking and deformation at the corner due to load concentration, at the same time, the connection firmness of the square locking piece and the box unit is enhanced, the U-shaped connector 407 is movably connected to the corners of the upper end cover 404 and the lower end cover 405 by a screw rod 410, and the upper end cover 404 and the lower end cover 405 are fixed by the screw rod 410.

[0032] The screw rod 410 fixes the U-shaped connector 407 and the upper end cover 404 and the lower end cover 405, the connection is reliable, the disassembly is convenient, and the installation and post-maintenance of the corner reinforcing piece are facilitated.

[0033] (1) Connection of the longitudinal reinforcing pipe 401 and the partition plate unit 2 (penetrating the middle penetrating pipe 204): without damaging the structure of the partition plate unit 2, the bearing capacity of the partition plate unit 2 is ensured, at the same time, the accurate positioning of the longitudinal reinforcing pipe 401 is realized, and it is ensured that the longitudinal reinforcing pipe 401 can effectively connect all the partition plate units 2, improving the longitudinal integrity; (2) The connection (through cooperation + nut 403 locking) of the transverse reinforcing rod 402 and the longitudinal reinforcing pipe 401 and the web unit 3: the connection is firm, and the transverse reinforcing rod 402 and the two can realize cooperative force, the lateral load borne by the web unit 3 is transmitted to the longitudinal reinforcing pipe 401, and then dispersed to each partition unit 2, so that the load is dispersed in the whole domain; meanwhile, the nut 403 locking is convenient for disassembly and maintenance; (3) The connection (arc-shaped slot clamping) of the square locking piece and the longitudinal reinforcing pipe 401 and the transverse reinforcing rod 402: the clamping is tight, the positioning is accurate, the relative displacement of the cross connection is avoided, the longitudinal and transverse reinforcing structures are cooperated to work, and the reinforcing effect is improved, and the stress at the connection is dispersed; (4) The connection (U-shaped clamping + screw rod 410 fixing) of the corner reinforcing piece and the square locking piece, the side top plate 302 and the bottom plate unit 1: the corner stress weak point is filled, the stability and bearing capacity of the corner part are enhanced, the middle reinforcing assembly 4 is closely connected with the box girder main structure, the continuity and anti-deformation ability of the overall structure are improved, and the screw rod 410 fixing is convenient for installation and later maintenance.

[0034] Specifically, in use: The large-span continuous wave web steel-mix combined box girder structure of the application is the core of the design of "modular splicing + multi-directional reinforcing cooperation", which realizes the high strength, high stability and anti-deformation ability of the box girder structure, adapts to the bearing demand of large-span engineering, and its overall working principle revolves around the four core links of "foundation bearing - partition stress - reinforcing anti-deformation - convenient assembly", and each structure cooperates, which is as follows: (I) Foundation bearing and overall forming principle: The overall bearing foundation of the box unit is formed by splicing the three core modules of the bottom plate unit 1, the web unit 3 and the partition unit 2, forming a closed box type stress system, providing a basic framework for vertical and horizontal load bearing in large-span scenarios.

[0035] The bottom plate unit 1 is the bottom bearing carrier of the whole box unit, and the rectangular bottom plate 101 directly receives the reaction force of the support structure below and transmits the load of the structure above; a plurality of groups of reinforcing protrusions 102 distributed longitudinally on the upper end of the bottom plate 101 are precisely clamped and welded with the clamping groove 209 at the bottom of the partition unit 2, realizing the positioning connection of the bottom plate unit 1 and the partition unit 2, ensuring the integrity of the connection between the two, and avoiding displacement and looseness at the splicing position.

[0036] The web unit 3 is symmetrically fixed on both sides of the upper end of the bottom plate unit 1 and is longitudinally distributed, the corrugated web 301 vertically receives the load of the bottom plate unit 1, and simultaneously forms the side protection and lateral bearing structure of the box unit, the top fixed side roof 302 is fixed and connected with the middle roof 203 at the top of the partition plate unit 2, and together constitutes the top bearing surface of the box girder, and finally through the splicing of the bottom plate unit 1, the web unit 3 and the partition plate unit 2, a complete box structure is formed, the uniform transmission of the load is realized, and the local stress concentration is avoided.

[0037] (II) Principle of load dispersion in different zones: 1. Stress dispersion of the partition plate unit 2: The partition plate unit 2 is transversely and equidistantly distributed on the upper end of the bottom plate unit 1, each group of the partition plate unit 2 is composed of the middle vertical plate 201, the two side inclined support plates 202 and the middle roof 203 at the top, the middle vertical plate 201 vertically bears the top load, the two side inclined support plates 202 form a triangular support structure, the vertical load borne by the middle vertical plate 201 is dispersed to the two sides and transmitted to the web unit 3, and then transmitted to the bottom plate unit 1 by the web unit 3, so that the load is dispersed in stages, and the stress pressure of a single structure is reduced.

[0038] 2. Stress optimization of the corrugated web 301: The web unit 3 adopts the corrugated web 301 structure, compared with the traditional flat web, the corrugated structure can effectively improve the shear strength and buckling resistance of the web, when bearing the lateral load and vertical shear force, the corrugated folds can disperse the stress, avoid local buckling deformation of the web, and the toughness of the corrugated structure can buffer the load impact and reduce the fatigue damage of the structure.

[0039] 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 absorbing the longitudinal prestress applied to the flange plate, and greatly improving the application efficiency of the prestress.

[0040] 3. Anti-deformation effect of the middle reinforcing assembly 4: The middle reinforcing assembly 4 is a core reinforcing structure, which penetrates through the entire box unit, the longitudinal reinforcing pipe 401 penetrates through several groups of the partition plate unit 2, realizes the longitudinal linkage of the partition plate unit 2, avoids the transverse deviation of the multiple groups of the partition plate unit 2, and improves the longitudinal integrity and anti-buckling ability of the box unit. The transverse reinforcing rod 402 penetrates through the web unit 3 and is cross-connected with the longitudinal reinforcing pipe 401, forming a reinforcing network intersecting longitudinally and transversely, tightly connecting the web unit 3, the partition plate unit 2 and the bottom plate unit 1 as a whole, realizing the global dispersion of the load, and further improving the bearing limit of the box unit.

[0041] (III) Structure positioning and locking principle: 1. Splicing positioning: the reinforcing protrusion 102 of the bottom plate unit 1 is clamped and matched with the clamping groove 209 of the partition plate unit 2, realizing the rapid positioning of the bottom plate unit 1 and the partition plate unit 2, ensuring the installation precision of the partition plate unit 2 on the bottom plate unit 1, and avoiding horizontal and vertical deviation; The middle top plate 203 of the partition plate unit 2 is fixed and connected with the side top plate 302 of the web plate unit 3, realizing the positioning and fixing of the partition plate unit 2 and the web plate unit 3, and guaranteeing the forming precision of the box unit.

[0042] 2. Cross locking: the horizontal reinforcing rod 402 is penetrated through the longitudinal reinforcing pipe 401, and the two ends are locked and fixed by using the nut 403 after penetrating through the corrugated web plate 301, realizing the double fixing of the horizontal reinforcing rod 402, the web plate unit 3 and the longitudinal reinforcing pipe 401; The square locking piece (upper end cover 404 and lower end cover 405) is clamped with the longitudinal reinforcing pipe 401 and the horizontal reinforcing rod 402 through the longitudinal arc-shaped groove 412 and the horizontal arc-shaped groove 411 respectively, locks the cross connection of the two, avoids loosening of the connection, and ensures the cooperative stress of the longitudinal and horizontal reinforcing structures.

[0043] 3. Corner reinforcement: the corner reinforcing piece is clamped in the corner of the upper end cover 404 and the lower end cover 405 through the U-shaped connector 407, and is fixed through the screw rod 410, the support block 406 at the end thereof and the reinforcing inclined support block 409 are connected between the side top plate 302 and the bottom plate unit 1, reinforcing the corner part of the box unit, filling the stress weak point between the side top plate 302 and the bottom plate unit 1, avoiding cracking and deformation of the corner due to load concentration, and further improving the stability of the overall structure.

[0044] (Four) Operation and maintenance convenience realization principle: The manhole pipe 205 is symmetrically arranged between the middle stand plate 201 and the inclined support plate 202 of the partition plate unit 2, providing a channel for the construction and operation and maintenance personnel to enter the inside of the box unit, facilitating the installation, repair and maintenance operation of the internal structures such as the middle reinforcing assembly 4 and the partition plate unit 2; The middle penetrating pipe 204 is used for penetrating the longitudinal reinforcing pipe 401, which not only realizes the accurate installation and positioning of the longitudinal reinforcing pipe 401, but also avoids the damage to the structure of the partition plate unit 2, and takes into account the reinforcing effect and structural integrity.

[0045] The present application has strong bearing capacity: through the modular splicing and the longitudinal and horizontal interlaced reinforcing structure, the load is graded and dispersed in the whole domain, the shear resistance, bending resistance and buckling resistance of the box girder are improved, the heavy load demand of large-span engineering is adapted, and the bearing limit is greatly improved; The present application has high stability: the structures are firmly connected and accurately positioned, forming a complete integrated box type stress system, avoiding local structure loosening and displacement, and having strong anti-deformation and anti-impact capacity, which can effectively cope with complex loads in large-span scenarios; The application is convenient to construct: modular design + convenient connection mode such as clamping and locking, simplifying installation process, improving construction efficiency and reducing construction cost; The application is convenient to operate and maintain: the setting of the manhole pipe 205 provides a convenient channel for internal structure operation and maintenance, each connection structure is convenient to disassemble, and is convenient for later maintenance, maintenance and structure adjustment; The application is economical: the corrugated web 301 does not need additional stiffening ribs, material usage is saved, modular design reduces processing and transportation cost, meanwhile, the structure has high stability, long service life and reduces later operation and maintenance cost; The application has wide applicability: the number and spacing of the box body units and the partition plate units 2 can be flexibly adjusted according to the actual size of the large-span project, and different span and different load demand engineering scenes can be adapted.

[0046] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A long-span continuous wave web steel-concrete composite box girder structure comprising box units, characterized in that: The 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 partition units symmetrically and transversely distributed on the upper end of the bottom plate unit; The web unit comprises a wave-shaped web fixed on the upper end of the bottom plate unit and a side edge top plate fixed on the top of the wave-shaped web; The upper end of the bottom plate unit is provided with a plurality of groups of partition units symmetrically and transversely distributed on the upper end of the bottom plate unit, the partition unit comprises a middle stand, a diagonal bracing plate symmetrically arranged on both sides of the middle stand, and a middle top plate fixed on the top of the middle stand and the diagonal bracing plate, and the middle top plate is fixed on the inner wall of the side edge top plate; The box unit is internally provided with a middle reinforcing assembly, the middle reinforcing assembly comprises a longitudinal reinforcing pipe penetrating through a plurality of groups of partition units, a transverse reinforcing rod penetrating and fixed between the web units, a square locking piece fixed at the connection of the longitudinal reinforcing pipe and the transverse reinforcing rod, and a corner reinforcing piece connected at the four corners of the square locking piece, and the corner reinforcing piece is connected between the side edge top plate and the bottom plate unit.

2. The long-span continuous wave web steel-concrete composite box girder structure according to claim 1, characterized in that: The bottom plate unit comprises a rectangular bottom plate and a plurality of groups of reinforcing protrusions symmetrically and longitudinally distributed on the middle part of the upper end of the rectangular bottom plate.

3. The long-span continuous wave web steel-concrete composite box girder structure according to claim 2, characterized in that: The bottom of the middle stand and the diagonal bracing plate is provided with a plurality of groups of clamping grooves symmetrically arranged at equal intervals, and the reinforcing protrusions are clamped into the corresponding clamping grooves.

4. The long-span continuous wavy web steel-concrete composite box girder structure according to claim 1, characterized in that: A manhole pipe is symmetrically arranged between the middle stand and the diagonal bracing plate, and a middle penetrating pipe is arranged between the middle stand and the diagonal bracing plate for penetrating the longitudinal reinforcing pipe.

5. The long-span continuous wavy web steel-concrete composite box girder structure according to claim 1, characterized in that: The transverse reinforcing rod penetrates through the longitudinal reinforcing pipe, and the two ends of the transverse reinforcing rod are locked and fixed by nuts after extending out through the wave-shaped web.

6. The long-span continuous wavy web steel-concrete composite box girder structure according to claim 1, characterized in that: The square locking piece comprises an upper end cover and a lower end cover fixed above and below the connection of the longitudinal reinforcing pipe and the transverse reinforcing rod, the upper end cover and the lower end cover are identical in shape, and the upper end cover and the lower end cover are respectively provided with a longitudinal arc-shaped groove and a transverse arc-shaped groove, and the longitudinal reinforcing pipe and the transverse reinforcing rod are respectively clamped in the longitudinal arc-shaped groove and the transverse arc-shaped groove.

7. The long-span continuous wave web steel-concrete composite box girder structure according to claim 6, characterized in that: The corner reinforcing piece comprises a U-shaped connector clamped at the corner of the upper end cover and the lower end cover, a support block fixed by a horizontal plate at the middle part of the U-shaped connector, and a reinforcing diagonal bracing block connected between the support block and the U-shaped connector; The reinforcing diagonal bracing block is fixed between the side edge top plate and the bottom plate unit.

8. The long-span continuous wavy 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 end cover and the lower end cover by a screw rod, and the upper end cover and the lower end cover are fixed by the screw rod.

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