A main beam structure

Abstract

The present invention discloses a main beam structure, including at least two bodies, wherein the body includes an upper flange, a lower flange and a web, and the body is a reinforced concrete member, and end partitions are provided at both ends of the body, wherein the end partitions connect two transversely adjacent bodies, and a plurality of transverse ribs and a plurality of vertical ribs are provided between the two end partitions on the same body, wherein the vertical ribs are connected to the side surfaces of the web, and the two ends of the transverse ribs are respectively connected to the side surfaces of the two transversely adjacent bodies corresponding to the upper flanges. The present invention adopts a one-time integrally cast bridge deck and transverse ribs, so that the main beam does not need to be provided with longitudinal and transverse wet joints; the present invention does not need to support and disassemble the formwork at the construction site, and greatly reduces the on-site steel bar binding work, so that the assembly rate of the main beam structure exceeds 90%, and the labor intensity of workers is reduced. The workers' work is mainly concentrated in the factory, and they become industrialized workers, driving the transformation and upgrading of the industry.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, in particular to a main beam structure. Background Art

[0002] The main components of a bridge are piers, cap beams, main beams, and bridge decks. In the prior art, the main beams are mainly T-beams and box beams, both of which use their flanges as bridge decks. They are heavy and difficult to hoist. Usually, after the main beams are erected, the longitudinal wet joints between adjacent main beams and the transverse wet joints of the diaphragms are cast first, and then the bridge deck leveling layer is cast. The number of longitudinal and transverse wet joints of traditional main beams is large, the positions are scattered, and the distribution range is large, resulting in a scattered casting surface during concrete construction. It is necessary to move the construction site many times for multiple castings. The casting time is likely to exceed the initial setting time of the concrete, resulting in poor concrete molding quality. Under the action of the static and dynamic loads of the bridge deck, the concrete of the longitudinal and transverse wet joints is prone to cracking, resulting in the main beams no longer being stressed as a whole, but being stressed individually, and the connection between them is weakened. The main structure of the bridge cannot be stressed in a coordinated manner, which greatly weakens the overall function of the bridge, and thus affects the durability of the structure; the diaphragms and leveling layers of the prior art are cast separately and cannot be cast at one time, resulting in complex procedures and long construction periods. Summary of the invention

[0003] The purpose of the present invention is to provide a main beam structure to solve the problems of longitudinal and transverse wet joints in the main beam of the bridge, complex construction process and poor integrity of the bridge structure.

[0004] In order to achieve the purpose, the present invention provides a main beam structure, including at least two bodies, wherein the body includes an upper flange, a lower flange and a web, the body is a reinforced concrete component, and end partitions are arranged at both ends of the body, the end partitions connect two laterally adjacent bodies, and a plurality of transverse ribs and a plurality of vertical ribs are arranged between the two end partitions on the same body, the vertical ribs are connected to the side surfaces of the web, and the two ends of the transverse ribs are respectively connected to the side surfaces of the upper flanges of the two laterally adjacent bodies, and the transverse ribs and the bridge deck are a cast-in-place integrally formed structure.

[0005] The main beam structure includes a main body, which includes an upper flange, a lower flange, and a web, that is, an I-shaped structural beam. Compared with the traditional main beam, the flange part is shortened and the reinforcement of the flange is simplified. The main body is a reinforced concrete component. The main body is provided with an end partition at each end, and a plurality of transverse ribs and a plurality of vertical ribs are arranged between the two end partitions on the same main body. The transverse ribs are connected to the side of the upper flange, and the vertical ribs are connected to the side of the web. The vertical ribs play a role in improving the cross-sectional stiffness and torsional strength of a single body. The transverse ribs and the end partitions can strengthen the connection performance between the laterally adjacent bodies, so that the two adjacent bodies are connected into a whole, replacing the middle transverse partition of the traditional main beam, and the corresponding transverse wet joints are no longer required. In addition, the stiffness and strength loss caused by the simplified flange as the bridge deck compared to the traditional main beam is compensated, so that the main body can have sufficient stiffness and strength to support its own weight and the weight of the upper structure, so that the bridge deck can be cast in one go after the erection of the main body is completed. There is no need to set longitudinal wet joints between the upper flanges of adjacent traditional main beams, which greatly simplifies the construction steps, shortens the construction period, is more conducive to quality control, and greatly improves the integrity of the bridge, ensuring the safety and durability of the bridge; the transverse ribs and bridge deck are an integrated structure, that is, they are cast in one time, compared with the prior art that the diaphragm and leveling layer need to be cast multiple times separately, which reduces the construction steps and shortens the construction period; one-time continuous casting and continuous construction ensure the casting quality, avoiding the need for multiple moving construction points and multiple casting of multiple scattered longitudinal and transverse wet joints of traditional main beams, and the casting time is likely to exceed the initial setting time of concrete, resulting in poor concrete molding quality problems; and the transverse ribs and bridge deck are cast in place as a whole, with good integrity, which greatly improves the durability of the bridge; compared with the traditional main beam, the main beam structure simplifies the flange as the bridge deck, so that the steel skeleton of the main beam is simplified, and it can be tied by machine intelligently, which greatly improves production efficiency and reduces production costs.

[0006] Preferably, a steel formwork is provided on the outer side of the transverse rib, and an embedded steel plate 1 is provided on the side of the upper flange, and the embedded steel plate 1 is connected to the corresponding steel formwork.

[0007] The steel formwork is prefabricated in the factory. The side formwork and the bottom formwork are formed in one piece and do not require assembly. The steel formwork is welded to the embedded steel plate on the side of the upper flange at the construction site to form the bottom and side formwork of the transverse rib. The shape of the steel formwork is preferably an inverted trapezoid with an open top. The upper side of the inverted trapezoid is 80 cm wide, the lower side is 20 cm wide, and the height is 30 cm. The steel formwork serves as a formwork for pouring concrete on the transverse ribs and bears the load of the reinforced concrete in the formwork and the construction load. Compared with traditional technology, there is no need to support the formwork and formwork support frame, which simplifies the construction steps and greatly shortens the construction period. After the pouring of the transverse ribs is completed, the steel formwork is not disassembled and continues to bear the upper load.

[0008] Preferably, the end partition includes a side plate and a bottom plate of a precast concrete structure, and the side plate and the bottom plate can be used to cast the end partition, and both sides of the side plate and the bottom plate are connected to the two adjacent bodies in a transverse bridge direction.

[0009] The end partition includes a side plate and a bottom plate of a precast concrete structure. The side plate and the bottom plate are enclosed together for casting the end partition. Both sides of the side plate and the bottom plate are connected to two adjacent bodies in the transverse direction. The plate edges of the side plate and the bottom plate used to connect the bodies are provided with edging steel. A second embedded steel plate is provided at a position corresponding to the end partition on the body. The edging steel is connected to the second embedded steel plate to realize the connection between the side plate, the bottom plate and the body. The end partition, the transverse ribs and the body are cast and formed as a whole. The side plate and the bottom plate are not disassembled after the end partition is cast and formed. As a part of the end partition, they participate in the force together. Compared with the construction process of the traditional end partition, the end partition of this scheme does not need to support the formwork and disassemble the formwork, which simplifies the construction steps and shortens the construction period. The bottom edge of the side plate and the transverse bridge edge of the bottom plate can also be provided with edging steel to enhance the bending and tensile strength of the side plate and the bottom plate.

[0010] Preferably, the steel reinforcement skeleton in the transverse ribs and the steel reinforcement skeleton of the bridge deck are an integrally formed structure.

[0011] The steel bar skeleton in the transverse rib is integrally bound with the steel bar skeleton of the bridge deck. The integrally formed steel bar skeleton is prefabricated in the factory and only needs to be hoisted after being transported to the construction site. No steel bar tying is required on site. The on-site construction environment eliminates the step of tying the beam and slab steel bars, greatly shortening the construction period. The factory-prefabricated steel bar skeleton reduces labor costs compared to the traditional on-site manual tying of the steel bar skeleton, and the quality of the steel bar skeleton produced in the factory is better controlled.

[0012] Preferably, the vertical ribs are symmetrically arranged on both sides of the corresponding web.

[0013] The vertical ribs are symmetrically arranged on both sides of the corresponding web, so that the vertical ribs on both sides of the web can work together better and provide higher section stiffness for the body.

[0014] Preferably, the vertical ribs are arranged corresponding to the transverse ribs, and the vertical ribs and the corresponding transverse ribs are arranged in the same plane.

[0015] The vertical ribs and the transverse ribs are arranged correspondingly, and the vertical ribs and the corresponding transverse ribs are arranged in the same plane, so that the vertical ribs and the transverse ribs together provide better rigidity and stability to the body.

[0016] Preferably, a connecting steel is provided at the end of the body, and the connecting steel is used to connect two laterally adjacent bodies.

[0017] Connecting steel sections are provided at both ends of the main body. When the main body is just erected on the cap beam, the connecting steel sections are used to quickly connect the main body without waiting for the concrete pouring of the end partitions to be completed and reach the corresponding strength. The main body can be connected into an overall stable structure in a short time, and then the main body of the next span can be transported on the main body to carry out the construction of the next span, which simplifies the construction steps, improves the construction efficiency and shortens the construction period.

[0018] Preferably, a third embedded steel plate is embedded at the end of the main body, and the third embedded steel plate is used to be connected to the connecting steel.

[0019] The end of the main body is provided with an embedded pre-embedded steel plate three for connection with the connecting steel. Thus, after the main body is erected, the connecting steel and the embedded steel plate three are directly welded or bolted to realize the rapid connection of two adjacent bodies in the horizontal direction, thus greatly improving the construction efficiency.

[0020] Preferably, the end partition and the body are prefabricated components formed in one piece, the connecting steel is replaceably connected to the end partition, a wet joint is provided between two laterally adjacent end partitions, and the connecting steel is provided in the wet joint.

[0021] After the erection of the main body is completed, the two adjacent end partitions are connected by connecting steel to achieve the connection of the two adjacent main bodies, and then the wet joint between the two adjacent end partitions is poured, and the connecting steel is buried in the wet joint. The concrete of the wet joint and the connecting steel bite together to bear the force together, and jointly connect the main body, playing the role of double fixed connection, and the concrete protects the connecting steel from moisture corrosion, thereby improving its durability.

[0022] Preferably, the end partition is a cast-in-place component, and the connecting steel is arranged in the end partition.

[0023] The connecting steel is arranged in the end partition, which is a cast-in-place component. After the main body is erected, the main body is first connected by the connecting steel, and then the end partition, which also serves as a connection between the main body, begins to pour concrete. The concrete of the end partition wraps the connecting steel, so that the connecting steel and the end partition are cast as a whole. The concrete of the end partition and the connecting steel bite together to bear the force together, and jointly connect the main body, playing the role of a double fixed connection. In addition, the concrete protects the connecting steel from corrosion by moisture, thereby improving its durability.

[0024] The present invention has at least the following beneficial effects:

[0025] Compared with the traditional T-beam and box-beam, the main beam structure of the present invention eliminates the bridge deck part and the transverse diaphragm that are integrally formed with the main beam. The bridge deck and the transverse ribs are cast as one piece, so that the main beam does not need to be provided with longitudinal and transverse wet joints, which greatly improves the integrity of the bridge structure and ensures the safety and durability of the bridge; the present invention also provides an end diaphragm, and the end diaphragm, transverse ribs and bridge deck are cast as one piece, which reduces the number of casting times, does not require the support and removal of formwork, and shortens the construction period; compared with the traditional T-beam and box-beam, the main body eliminates the integrally formed bridge deck, so the deadweight is greatly reduced, which greatly reduces the difficulty of lifting; the steel skeleton of the transverse rib and the steel skeleton of the bridge deck are integrated in the factory, and the steel skeleton of the main beam is produced in the factory, which saves the step of on-site binding of beam and slab steel bars, shortens the construction period, and saves costs. The assembly rate of the main beam structure exceeds 90%, which reduces the labor intensity of workers. The workers' work is mainly concentrated in the factory, and they become industrialized workers, driving the transformation and upgrading of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the main beam structure of the present invention.

[0027] Figure 2 It is a cross-sectional view of the beam end of the main beam structure of the present invention.

[0028] Figure 3 It is a schematic diagram of another embodiment of the beam end section of the main beam structure of the present invention.

[0029] Figure 4 It is a cross-sectional view of the steel template of the present invention.

[0030] Figure 5 It is a three-dimensional diagram of the main beam structure of the present invention.

[0031] Figure 6 It is a schematic diagram of the connection state of the main beam structure of the present invention.

[0032] Figure numerals: 1-main body, 101-upper flange, 102-lower flange, 103-web, 2-end partition, 3-vertical rib, 4-transverse rib, 5-connecting steel, 6-bridge deck, 7-steel formwork. DETAILED DESCRIPTION

[0033] The technical content of the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0034] Figures 1 to 6 The main beam structure of the present invention is shown, comprising:

[0035] The bridge comprises at least two main bodies 1, wherein the main body 1 comprises an upper flange 101, a lower flange 102 and a web 103. The main body 1 is a reinforced concrete member. End partitions 2 are arranged at both ends of the main body 1, and the end partitions 2 connect the two laterally adjacent main bodies 1. A plurality of transverse ribs 4 and a plurality of vertical ribs 3 are arranged between the two end partitions 2 on the same main body 1, and the vertical ribs 3 are connected to the side surfaces of the web 103. The two ends of the transverse rib 4 are respectively connected to the side surfaces of the upper flanges 101 of the two laterally adjacent main bodies 1, and the transverse ribs 4 and the bridge deck 6 are cast-in-place integrally formed structures.

[0036] In this solution, the main beam structure includes a main body 1, which includes an upper flange 101, a lower flange 102, and a web 103, that is, an I-shaped structural beam. Compared with the traditional main beam, the flange part is shortened and the reinforcement of the flange is simplified. The main body 1 is a reinforced concrete member. The main body 1 is provided with an end partition 2 at each end, and a plurality of transverse ribs 4 and a plurality of vertical ribs 3 are arranged between the two end partitions 2 on the same main body 1. The transverse rib 4 is connected to the side of the upper flange 101, and the vertical rib 3 is connected to the side of the web 103. The vertical ribs 3 play a role in improving the cross-sectional rigidity and torsional strength of a single body 1. The transverse ribs 4 and the end diaphragms 2 can strengthen the connection performance between the transversely adjacent bodies 1, so that the two adjacent bodies 1 are connected into a whole, replacing the middle transverse diaphragm of the traditional main beam. The corresponding transverse wet joints do not need to be set up, and the rigidity and strength loss caused by the simplified flange of the bridge deck 6 compared to the traditional main beam is compensated, so that the body 1 can have sufficient rigidity and strength to support the weight of itself and the upper structure, so that the bridge deck 6 can be After the main body 1 is erected, it is cast in one go, and there is no need to set a longitudinal wet joint between the upper flanges 101 of adjacent traditional main beams, which greatly simplifies the construction steps, shortens the construction period, is more conducive to quality control, and greatly improves the integrity of the bridge, ensuring the safety and durability of the bridge; the transverse ribs 4 and the bridge deck 6 are an integrally formed structure, that is, they are cast in one go, compared with the prior art diaphragms and leveling layers that need to be cast multiple times separately, which reduces the construction steps and shortens the construction period; one-time continuous casting, continuous construction, ensures the casting quality, avoids the need for multiple scattered longitudinal and transverse wet joints of traditional main beams to move the construction points multiple times for casting, and the casting time is likely to exceed the initial setting time of concrete, resulting in poor concrete molding quality problems; and the transverse ribs 4 and the bridge deck 6 are cast in place as a whole, and have good integrity, which greatly improves the durability of the bridge; compared with the traditional main beam, the main beam structure simplifies the flange of the bridge deck 6, so that the steel skeleton of the main beam is simplified, and it can be tied by machine intelligently, which greatly improves production efficiency and reduces production costs.

[0037] Furthermore, a steel template 7 is provided on the outer side of the transverse rib 4 , and an embedded steel plate 1 is provided on the side of the upper flange 101 , and the embedded steel plate 1 is connected to the corresponding steel template 7 .

[0038] By adopting this scheme, the steel formwork 7 is prefabricated in the factory, and the side formwork and the bottom formwork are integrally formed without the need for assembly. The steel formwork 7 is welded to the embedded steel plate on the side of the upper flange 101 at the construction site to form the bottom and side formworks of the transverse rib 4. The shape of the steel formwork 7 is preferably an inverted trapezoid with an open top. The upper side of the inverted trapezoid is 80 cm wide, the lower side is 20 cm wide, and the height is 30 cm. The steel formwork 7 serves as a formwork for pouring concrete for the transverse rib 4 and bears the load of the reinforced concrete in the formwork and the construction load. Compared with traditional technologies, there is no need to support the formwork and the formwork support frame, which simplifies the construction steps and greatly shortens the construction period. After the pouring of the transverse rib 4 is completed, the steel formwork 7 is not disassembled and continues to bear the upper load.

[0039] Furthermore, the end partition 2 includes side plates and a bottom plate of a precast concrete structure, and the side plates and the bottom plate can be used to cast the end partition 2, and both sides of the side plates and the bottom plate are connected to the two adjacent bodies 1 through a transverse bridge.

[0040] With this solution, the end partition 2 includes a side plate and a bottom plate of a precast concrete structure. The side plates and the bottom plate are enclosed together for casting the end partition 2. Both sides of the side plates and the bottom plate are connected to the two adjacent bodies 1 in the transverse direction. The side plates and the bottom plate are provided with edging steel for connecting the plate edges of the body 1. A second embedded steel plate is provided at the position corresponding to the end partition 2 on the body 1. The side plates, the bottom plate and the body 1 are connected by connecting the edging steel with the second embedded steel plate. The side plates and the bottom plate are not disassembled after the end partition 2 is cast and formed. As a part of the end partition 2, they participate in the force together. Compared with the construction process of the traditional end partition, the end partition 2 of this solution does not need to support the formwork and disassemble the formwork, which simplifies the construction steps and shortens the construction period. The bottom edge of the side plate and the transverse bridge edge of the bottom plate can also be provided with edging steel to enhance the bending and tensile strength of the side plate and the bottom plate.

[0041] Furthermore, the steel skeleton in the transverse rib 4 and the steel skeleton of the bridge deck 6 are an integrally formed structure.

[0042] By adopting this solution, the steel bar skeleton in the transverse rib 4 and the steel bar skeleton of the bridge deck 6 are integrally bound together. The integrally formed steel bar skeleton is prefabricated in the factory and only needs to be hoisted after being transported to the construction site. No steel bar tying is required on site. The on-site construction environment eliminates the step of tying the beam and slab steel bars, greatly shortening the construction period. The factory-prefabricated steel bar skeleton reduces labor costs compared to the traditional on-site manual tying of the steel bar skeleton, and the quality of the steel bar skeleton produced in the factory is better controlled.

[0043] In another embodiment, the vertical ribs 3 are symmetrically arranged on both sides of the corresponding web 103 .

[0044] With this solution, the vertical ribs 3 are symmetrically arranged on both sides of the corresponding web 103 , so that the vertical ribs 3 on both sides of the web 103 can work together better to provide the body 1 with higher cross-sectional rigidity.

[0045] Furthermore, the vertical ribs 3 are arranged corresponding to the transverse ribs 4, and the vertical ribs 3 and the corresponding transverse ribs 4 are arranged in the same plane.

[0046] With this solution, the vertical ribs 3 and the transverse ribs 4 are arranged correspondingly, and the vertical ribs 3 and the corresponding transverse ribs 4 are arranged in the same plane, so that the vertical ribs 3 and the transverse ribs 4 together provide better rigidity and stability to the body 1.

[0047] In another embodiment, a connecting steel 5 is provided at the end of the main body 1 , and the connecting steel 5 is used to connect two laterally adjacent main bodies 1 .

[0048] With this solution, connecting steel sections 5 are provided at both ends of the main body 1. When the main body 1 is just erected on the cap beam, the connecting steel sections 5 are used to quickly connect the main body 1 without waiting for the concrete pouring of the end partition 2 to be completed and reach the corresponding strength. The main body 1 can be connected into an overall stable structure in a short time, and then the main body 1 of the next span can be transported on the main body 1 to carry out the construction of the next span, which simplifies the construction steps, improves the construction efficiency, and shortens the construction period.

[0049] Furthermore, a pre-embedded steel plate three is embedded at the end of the main body 1 , and the pre-embedded steel plate three is used to be connected to the connecting steel 5 .

[0050] By adopting this solution, the end of the main body 1 is provided with an embedded pre-embedded steel plate three for connecting with the connecting steel 5. Thus, after the main body 1 is erected, the connecting steel 5 and the embedded steel plate three are directly welded or bolted to realize the rapid connection of two laterally adjacent main bodies 1, thereby greatly improving the construction efficiency.

[0051] In another embodiment, the end partition 2 and the main body 1 are prefabricated components formed in one piece, the connecting steel 5 is replaced and connected to the end partition 2, a wet joint is set between two laterally adjacent end partitions 2, and the connecting steel 5 is set in the wet joint.

[0052] By adopting this scheme, after the main body 1 is erected, the two adjacent end partitions 2 are first connected by the connecting steel 5 to realize the connection of the two adjacent main bodies 1, and then the wet joint between the two adjacent end partitions 2 is poured, and the connecting steel 5 is buried in the wet joint. The concrete of the wet joint and the connecting steel 5 bite together and bear the force together to connect the main body 1, which plays the role of double fixed connection. In addition, the concrete protects the connecting steel 5 from corrosion by moisture, thereby improving its durability.

[0053] In another embodiment, the end partition plate 2 is a cast-in-place component, and the connecting steel 5 is arranged in the end partition plate 2.

[0054] With this solution, the connecting steel 5 is arranged in the end partition 2, and the end partition 2 is a cast-in-place component. After the main body 1 is erected, the main body 1 is first connected by the connecting steel 5, and then the end partition 2 which also serves to connect the main body 1 begins to pour concrete. The concrete of the end partition 2 wraps the connecting steel 5, so that the connecting steel 5 and the end partition 2 are cast into a whole. The concrete of the end partition 2 and the connecting steel 5 bite together and bear the force together, and jointly connect the main body 1, playing the role of a double fixed connection, and the concrete protects the connecting steel 5 from corrosion by moisture, thereby improving its durability.

[0055] In another embodiment, after the main body 1 is erected on the cap beam, the adjacent main bodies 1 are first connected by connecting steel sections 5 so that all the main bodies 1 form a whole, and then the main body 1 of the next span is transported to the next span on the main body 1, so that two spans can be constructed simultaneously, shortening the construction period, and then the end diaphragm 2 is poured, and the concrete of the end diaphragm 2 wraps the steel section, and the end diaphragm 2 and the steel section are engaged together to bear the force together, providing a better connection method than the traditional end diaphragm 2, and then the steel formwork 7 is welded to the embedded steel plate 1, and the steel reinforcement skeleton formed by the transverse rib 4 and the bridge deck 6 is hoisted. The bridge deck 6 and the transverse ribs 4 are cast as one piece, and the transverse ribs 4 and the vertical ribs 3 are arranged correspondingly on the main body 1, so as to form a synergistic effect of the end partitions 2, the transverse ribs 4, and the vertical ribs 3, connecting all the main bodies 1 to provide reliable rigidity and strength guarantees. Compared with the prior art, this solution no longer needs to set longitudinal and transverse wet joints, thereby improving the integrity of the bridge and thus improving the durability. In addition, the bridge deck 6 and the transverse ribs 4 are cast as one piece, which reduces the number of casting times and shortens the construction period. The main body 1 cancels the one-piece bridge deck 6 part, reduces the weight, and reduces the difficulty of lifting.

[0056] In another embodiment, the connection steel 5 is not arranged in the end partition 2.

[0057] With this solution, the connection steel 5 is not arranged in the end partition 2 , and the connection steel 5 and the end partition 2 are respectively connected to the main body 1 , playing a role in firmly connecting the main body 1 .

[0058] In another embodiment, the vertical ribs 3 are asymmetrically arranged on both sides of the web 103 .

[0059] By adopting this solution, the cross-sectional rigidity of the body 1 can be improved by arranging the vertical ribs 3 asymmetrically on the web 103 .

[0060] In another embodiment, the transverse ribs 4 are arranged on the upper flange 101 at intervals of 5-6 meters.

[0061] By adopting this solution, the transverse ribs 4 are arranged on the upper flange 101 at intervals of 5-6 meters, which can ensure the overall stability and rigidity of all the main bodies 1 on the bridge. The spacing between the transverse ribs 4 on the upper flange 101 is preferably 5 meters, and the spacing can be adjusted according to the results of the main beam structure force analysis.

[0062] Furthermore, the transverse rib 4 is 25-35 cm high.

[0063] With this solution, the transverse rib 4 is 25-35 cm high, which can ensure that the transverse rib 4 provides sufficient bending moment reaction force to the bridge deck 6 and ensures the stiffness and torsional strength of all the main bodies 1 on the bridge. When the spacing between laterally adjacent main bodies 1 is 1.5-2.2 meters, the height of the transverse rib 4 is preferably 30 cm, and this spacing can be adjusted according to the results of the main beam structure force analysis.

[0064] It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various forms of deformation and modification within the scope of the claims, which does not affect the essential content of the present invention.

Claims

1. A main beam structure, characterized in that: The invention comprises at least two bodies (1), wherein the body (1) is an I-shaped structural beam comprising an upper flange (101), a lower flange (102) and a web (103), the body (1) being a reinforced concrete member, end diaphragms (2) being arranged at both ends of the body (1), the end diaphragms (2) connecting two transversely adjacent bodies (1), a plurality of transverse ribs (4) and a plurality of vertical ribs (3) being arranged between two end diaphragms (2) on the same body (1), the vertical ribs (3) being connected to the side surfaces of the web (103), the two ends of the transverse rib (4) being respectively connected to the side surfaces of the upper flanges (101) of two transversely adjacent bodies (1), the transverse rib (4) and the bridge deck (6) being a cast-in-place integrally formed structure; The vertical ribs (3) are symmetrically arranged on both sides of the corresponding web (103); The vertical ribs (3) are arranged corresponding to the transverse ribs (4), and the vertical ribs (3) and the corresponding transverse ribs (4) are arranged in the same plane; A steel formwork (7) is provided on the outer side of the transverse rib (4), and a pre-embedded steel plate (1) is provided on the side of the upper flange (101), wherein the pre-embedded steel plate (1) is connected to the corresponding steel formwork (7).

2. The main beam structure according to claim 1, characterized in that: The end partition (2) comprises a side plate and a bottom plate of a precast concrete structure, wherein the side plate and the bottom plate can be used to cast the end partition (2), and both sides of the side plate and the bottom plate are connected to the two adjacent bodies (1) via a transverse bridge.

3. The main beam structure according to claim 2, characterized in that: The steel reinforcement frame in the transverse rib (4) and the steel reinforcement frame of the bridge deck are an integrally formed structure.

4. The main beam structure according to claim 1, characterized in that: A connecting steel (5) is provided at the end of the body (1), and the connecting steel (5) is used to connect two laterally adjacent bodies (1).

5. The main beam structure according to claim 4, characterized in that: A third embedded steel plate is embedded at the end of the body (1), and the third embedded steel plate is used to be connected to the connection steel (5).

6. The main beam structure according to claim 5, characterized in that: The end partition (2) and the body (1) are prefabricated components formed in one piece, the connecting steel (5) is replaceably connected to the end partition (2), a wet joint is provided between two laterally adjacent end partitions (2), and the connecting steel (5) is provided in the wet joint.

7. The main beam structure according to claim 5, characterized in that: The end partition (2) is a cast-in-place component, and the connecting steel (5) is arranged inside the end partition (2).

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