Connecting structure and method suitable for dislocation of steel guide beam and steel box beam web

Abstract

The invention discloses a connecting structure and method suitable for dislocation of a steel guide beam and a steel box beam web, and relates to the technical field of bridge incremental launching construction, the connecting structure comprises a steel box beam top plate, a steel box beam bottom plate, the steel box beam web, a steel guide beam top plate, a steel guide beam bottom plate, the steel guide beam web, a steel box beam end sealing plate and a stiffening plate; the steel guide beam webs and the steel box beam webs are arranged in a staggered manner in the transverse bridge direction; the steel guide beam web plate extends to the steel box beam end sealing plate and is welded and fixed; the steel box girder web plate extends to the stiffening plate and is welded and fixed; the stiffening plate is vertically welded between the steel box girder top and bottom plate and the steel guide girder web; and all the plates jointly form a closed box-shaped structure. According to the connecting structure, the steel guide beam web and the steel box beam web are connected in a staggered mode to form a closed box-shaped structure, so that the guide beam web can be kept in a vertical state, mainly bears bending moment and shearing force at the connecting position and does not bear torque, the risk that a traditional inclined web guide beam is bent and damaged due to the fact that the guide beam bears the torque is avoided, the stress path is clear, and the service life is long. And the structure is safer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge incremental launching construction technology, in particular to a connecting structure and method suitable for the misalignment of steel guide beams and steel box beam webs. BACKGROUND

[0002] In the construction of steel box beams across lines, rivers, and mountainous areas, incremental launching construction can reduce the use of hoisting equipment, is not limited by the site, has the advantages of high construction efficiency, small interference to traffic under the bridge, and strong adaptability to various complex terrains.

[0003] In incremental launching construction, a guide beam needs to be welded to the front end of the steel box beam. The bending moment and shear force at the connection between the steel box beam and the guide beam are large, and ensuring the safety of the connection is of great significance to the construction efficiency and safety of the steel box beam incremental launching construction. In the past, the connecting method of the steel guide beam and the steel box beam was as follows: the webs and top plates of both the steel guide beam and the steel box beam were ensured to be butt-welded. In this method, the position of the guide beam web is determined by the position of the steel box beam web. For a steel box beam with an inclined web, the guide web needs to be set to be inclined, which causes the guide beam web to bear a torque, the structure is complex in stress, there is a risk of buckling failure, and the stress safety is affected. At the same time, this connecting method also limits the arrangement position of the guide beam in the transverse direction of the bridge, lacks flexibility, and is difficult to adapt to special construction environments such as large-curvature ramp bridges or urban interchanges that require adjustment of the width of the guide beam.

[0004] Therefore, a connecting structure and method suitable for the misalignment of steel guide beams and steel box beam webs are proposed. SUMMARY

[0005] The purpose of the present application is to provide a connecting structure and method suitable for the misalignment of steel guide beams and steel box beam webs to solve the problem of the complex stress and the risk of buckling failure of the existing connecting method of steel guide beams and steel box beams due to the torque borne by the guide beam web.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a connecting structure suitable for the misalignment of steel guide beams and steel box beam webs, comprising a steel box beam top plate and a steel box beam bottom plate, a steel box beam web, a steel guide beam top plate and a steel guide beam bottom plate, a steel guide beam web, a steel box beam end plate, and a stiffener plate; the steel guide beam web and the steel box beam web are arranged in misalignment in the transverse direction of the bridge; the steel guide beam web extends to the steel box beam end plate and is welded and fixed; the steel box beam web extends to the stiffener plate and is welded and fixed; the stiffener plate is vertically welded between the steel box beam top plate and the steel box beam bottom plate and the steel guide beam web; and the plates collectively form a closed box-shaped structure.

[0007] Preferably, the steel guide beam web remains in a vertical state.

[0008] Preferably, butt-welding is used to connect the steel box beam top plate and the steel box beam bottom plate to the steel guide beam top plate and the steel guide beam bottom plate.

[0009] Preferably, the steel box girder web is an inclined web.

[0010] A connecting method suitable for the misalignment of a steel guide beam and a steel box girder web, comprising the following steps: S1: misaligning the steel guide beam web and the steel box girder web in the transverse bridge direction; S2: butt-welding the steel guide beam top plate and the steel guide beam bottom plate with the steel box girder top plate and the steel box girder bottom plate; S3: extending the steel guide beam web to the steel box girder end sealing plate and welding; S4: extending the steel box girder web to the stiffening plate and welding; S5: vertically welding the stiffening plate between the steel box girder top plate and the steel box girder bottom plate and the steel guide beam web, forming a closed box structure composed of various plate members.

[0011] Preferably, the steel guide beam web remains vertical during the connecting process.

[0012] Preferably, the steel guide beam web and the steel box girder web jointly bear the bending moment and the shear force, but not the torque.

[0013] Preferably, the method is suitable for a bridge structure with an inclined steel box girder web.

[0014] Preferably, the method is suitable for the incremental launching construction of a large-curvature ramp bridge or an urban overpass, and the guide beam width is adjusted according to the overlap width of the front end of the guide beam.

[0015] Preferably, the closed box structure is formed by the steel guide beam web, the steel box girder web, the steel box girder end sealing plate, the stiffening plate, and the steel guide beam top plate, the steel guide beam bottom plate, the steel box girder top plate, and the steel box girder bottom plate.

[0016] Compared with the prior art, the beneficial effects of the present application are: 1. The connecting structure connects the steel guide beam web and the steel box girder web in misalignment and forms a closed box structure, so that the guide beam web can remain vertical, mainly bearing the bending moment and the shear force at the connection, and not bearing the torque, avoiding the risk of buckling failure of the traditional inclined web guide beam due to bearing the torque, and the stress path is clear and the structure is safer.

[0017] 2. The connecting structure does not need to directly butt the steel guide beam web with the steel box girder web, so the arrangement position of the guide beam in the transverse bridge direction can be adjusted according to actual construction needs. This makes the technology particularly suitable for complex construction environments such as large-curvature ramp bridges or urban overpasses that need to adjust the guide beam width according to the overlap width of the front end of the guide beam, greatly improving the adaptability of the incremental launching construction technology.

[0018] 3, The structure parts used in the connection method are all conventional steel plates, which can be realized by reasonable extension and welding, without complex structure or special components, and the construction technology is mature, easy to implement and ensure quality in the engineering site. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description of the embodiments, given in conjunction with the following drawings, wherein: Figure 1 is a plan view of the connection method of the steel guide beam and the steel box girder in the present application; Figure 2 is Figure 1 a cross-sectional view in the direction of 1-1 in the present application; Figure 3 is Figure 1 a cross-sectional view in the direction of 2-2 in the present application.

[0020] In the figure: 1-1, steel guide beam top plate; 1-2, steel guide beam web plate; 1-3, steel guide beam bottom plate; 2-1, steel box girder top plate; 2-2, steel box girder web plate; 2-3, steel box girder end sealing plate; 2-4, steel box girder bottom plate; 3-1, stiffened plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings showing the multiple embodiments according to the present application. It should be understood that the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by those skilled in the art without creative labor shall fall within the scope of protection of the present application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms used in the description of the present application are used for illustrative purposes only and are not intended to limit the scope of the application. The terms "comprise", "comprising", "include", "including", "have" and "having" are used in the specification to mean "including but not limited to". The terms "comprise", "comprising", "include", "including", "have" and "having" are used in the specification to mean "including but not limited to". The terms "first", "second", and the like, as used in the description of the application, do not connote any order, quantity, or importance, but rather are used to distinguish one element from another. In addition, the terms "first" and "second" are used only for descriptive purposes and do not connote or imply any relative importance or any fixed number of the indicated elements. Thus, a feature defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality" is two or more, unless otherwise specified.

[0023] In the description of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0024] In the description of the application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0025] It should be emphasized that when the term "comprise / contain" is used in the specification, it is used to explicitly indicate the presence of the features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps, components or groups of features, integers, steps, components.

[0026] The term "and / or", in this application, is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this application generally represents an "or" relationship between the front and rear associated objects.

[0027] Referring to Figures 1-3 The present application provides a technical scheme suitable for the connection structure and method of the misalignment of the steel guide beam and the steel box beam web: A connection structure suitable for the misalignment of the steel guide beam and the steel box beam web, comprising a steel box beam top plate 2-1 and a steel box beam bottom plate 2-4, a steel box beam web 2-2, a steel guide beam top plate 1-1 and a steel guide beam bottom plate 1-3, a steel guide beam web 1-2, a steel box beam end sealing plate 2-3 and a stiffener plate 3-1; the steel guide beam web 1-2 and the steel box beam web 2-2 are misaligned in the transverse bridge direction; the steel guide beam web 1-2 extends to the steel box beam end sealing plate 2-3 and is welded and fixed; the steel box beam web 2-2 extends to the stiffener plate 3-1 and is welded and fixed; the stiffener plate 3-1 is vertically welded between the steel box beam top plate 2-1 and the steel box beam bottom plate 2-4 and the steel guide beam web 1-2; the plates form a closed box structure.

[0028] During the incremental launching construction process, the bending moment and shear force borne by the connection between the steel box beam and the steel guide beam are effectively transmitted and distributed through the closed box structure. The steel guide beam web 1-2 and the steel box beam web 2-2, as the main force-bearing components, jointly bear the bending moment and shear force. Since the steel guide beam web 1-2 remains vertical and is misaligned with the steel box beam web 2-2, its force-bearing state is clear, and the generation of torque is avoided, thereby improving the safety and reliability of the entire connection structure.

[0029] The present connection structure misaligns the steel guide beam web 1-2 with the steel box beam web 2-2 and forms a closed box structure, so that the steel guide beam web 1-2 can remain in a vertical state and mainly bear the bending moment and shear force at the connection, without bearing torque, thereby avoiding the risk of buckling failure of the traditional inclined web guide beam due to bearing torque, and the force-bearing path is clear and the structure is safer.

[0030] The present connection structure utilizes the fact that the steel guide beam web 1-2 does not need to be directly connected with the steel box beam web 2-2, so the arrangement position of the guide beam in the transverse bridge direction can be adjusted according to actual construction needs. This makes the technology particularly suitable for complex construction environments such as large-curvature ramp bridges or urban overpasses that need to adjust the width of the guide beam according to the lap width of the front end of the guide beam, greatly improving the adaptability of the incremental launching construction technology.

[0031] It should be noted that the web 1-2 of the steel guide beam remains vertical. This configuration effectively optimizes the mechanical properties of the structure. The vertical web 1-2 distributes bending moment and shear force more evenly under load, avoiding stress concentration caused by the tilted angle. Furthermore, this configuration simplifies installation steps during construction, reduces reliance on complex support equipment, and further lowers construction difficulty and cost. The top plate 2-1 and bottom plate 2-4 of the steel box girder are butt-welded to the top plate 1-1 and bottom plate 1-3 of the steel guide beam. This configuration significantly improves the overall strength and stability of the connection. Butt welding ensures uniform weld distribution, effectively transferring loads and preventing structural failure due to excessive local stress. In addition, this connection method has good fatigue resistance, maintaining high reliability over long-term use. The web 2-2 of the steel box girder is an inclined web. This configuration not only optimizes the load transfer path but also effectively reduces the risk of deformation due to local stress concentration. While improving the overall structural stability, it also provides greater convenience for subsequent maintenance and repair.

[0032] Another embodiment of the present invention provides a connection method suitable for misalignment of the web plates of a steel guide beam and a steel box girder, comprising the following steps: Step 1: The web plate 1-2 of the steel guide beam and the web plate 2-2 of the steel box girder are arranged in a misaligned manner in the transverse direction of the bridge; Step 2: The top plate 1-1 and the bottom plate 1-3 of the steel guide beam are butt-welded to the top plate 2-1 and the bottom plate 2-4 of the steel box girder; Step 3: The web plate 1-2 of the steel guide beam is extended to the end cap plate 2-3 of the steel box girder and welded; Step 4: The web plate 2-2 of the steel box girder is extended to the stiffening plate 3-1 and welded; Step 5: The stiffening plate 3-1 is vertically welded between the top plate 2-1 and the bottom plate 2-4 of the steel box girder and the web plate 1-2 of the steel guide beam, forming a closed box-shaped structure composed of various plates.

[0033] It should be noted that the web plate 1-2 of the steel guide beam remains vertical during the connection process. This arrangement effectively enhances the stability of the structure and avoids deformation or damage caused by uneven stress. The web plate 1-2 of the steel guide beam and the web plate 2-2 of the steel box girder share the bending moment and shear force, but do not bear the torque. This arrangement reduces the need for additional supports, thereby reducing construction difficulty and material costs. This method is applicable to bridge structures where the web plate 2-2 of the steel box girder is inclined. This method is applicable to the jacking construction of ramp bridges with large curvature or urban overpasses, where the width of the guide beam is adjusted according to the overlap width at the front end of the guide beam. The enclosed box girder structure is formed by the web plate 1-2 of the steel guide beam, the web plate 2-2 of the steel box girder, the end cap plate 2-3 of the steel box girder, the stiffening plate 3-1, and the top plate 1-1, bottom plate 1-3, top plate 2-1, and bottom plate 2-4 of the steel guide beam.

[0034] The structural components used in this connection method are all conventional steel plates, which can be achieved through reasonable extension and welding. No complex structure or special components are required. The construction technology is mature, easy to implement on the engineering site, and quality can be guaranteed.

[0035] Working principle: Refer to Figure 1 The diagram shows the plan view of the connection between the steel guide beam and the steel box girder. The web 2-2 of the steel box girder is an inclined web. The web 1-2 of the steel guide beam and the web 2-2 of the steel box girder are staggered at a certain distance in the transverse direction of the bridge and are not aligned. Both the web 1-2 of the steel guide beam and the web 2-2 of the steel box girder extend towards the connection area.

[0036] The specific connection process is as follows: The top plate 1-1 and bottom plate 1-3 of the steel guide beam are butt-welded to the top plate 2-1 and bottom plate 2-4 of the steel box girder, respectively. The web plate 1-2 of the steel guide beam is extended to the end plate 2-3 of the steel box girder and welded to it for fixation. Simultaneously, a stiffening plate 3-1 is installed inside the steel guide beam, and this stiffening plate 3-1 is perpendicularly welded to the top plate 2-1, bottom plate 2-4, and web plate 1-2 of the steel box girder. The web plate 2-2 of the steel box girder is extended to the stiffening plate 3-1 and welded to it for fixation. (Refer to...) Figure 2 and Figure 3 As shown, the web 1-2 of the steel guide beam remains vertical throughout the connection process. Its extended portion is welded and fixed to the top plate 2-1 and bottom plate 2-4 of the steel box girder. The web 2-2 of the steel box girder extends into the interior of the steel guide beam and is welded and fixed to the top plate 1-1 and bottom plate 1-3 of the steel guide beam.

[0037] Through the above connection method, a solid and enclosed box-shaped space is formed by the steel guide beam web 1-2, the steel box girder web 2-2, the steel box girder end cap 2-3, the stiffening plate 3-1, and the top and bottom plates of the steel guide beam and the steel box girder.

[0038] 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 connection structure suitable for misalignment between the web of a steel guide beam and a steel box girder, characterized in that: It includes a steel box girder top plate (2-1) and a steel box girder bottom plate (2-4), a steel box girder web plate (2-2), a steel guide beam top plate (1-1) and a steel guide beam bottom plate (1-3), a steel guide beam web plate (1-2), a steel box girder end cap plate (2-3), and a stiffening plate (3-1); the steel guide beam web plate (1-2) and the steel box girder web plate (2-2) are staggered in the transverse direction of the bridge; the steel guide beam web plate (1-2) extends to the steel box girder end cap plate (2-3) and is welded and fixed; the steel box girder web plate (2-2) extends to the stiffening plate (3-1) and is welded and fixed; the stiffening plate (3-1) is vertically welded between the steel box girder top plate (2-1) and the steel box girder bottom plate (2-4) and the steel guide beam web plate (1-2); all the plates together form a closed box structure.

2. The connection structure for misalignment of steel guide beam and steel box girder web as described in claim 1, characterized in that: The web of the steel guide beam (1-2) remains vertical.

3. The connection structure for misalignment of steel guide beam and steel box girder web as described in claim 2, characterized in that: The top plate (2-1) and bottom plate (2-4) of the steel box girder are connected to the top plate (1-1) and bottom plate (1-3) of the steel guide beam by butt welding.

4. The connection structure for misalignment of steel guide beam and steel box girder web as described in claim 3, characterized in that: The web of the steel box girder (2-2) is an inclined web.

5. A connection method for misaligned webs of steel guide beams and steel box girders, used in any one of the connection structures for misaligned webs of steel guide beams and steel box girders as described in claims 1 to 4, characterized in that... Includes the following steps: S1: The web plates of the steel guide beam (1-2) and the web plates of the steel box girder (2-2) are staggered in the transverse direction of the bridge. S2: Butt weld the top plate (1-1) and bottom plate (1-3) of the steel guide beam to the top plate (2-1) and bottom plate (2-4) of the steel box girder; S3: Extend the web plate (1-2) of the steel guide beam to the end plate (2-3) of the steel box girder and weld it; S4: Extend the web plate (2-2) of the steel box girder to the stiffening plate (3-1) and weld it; S5: The stiffening plate (3-1) is vertically welded between the top plate (2-1) and bottom plate (2-4) of the steel box girder and the web plate (1-2) of the steel guide beam to form a closed box structure composed of various plates.

6. The connection method for misalignment of steel guide beam and steel box girder web as described in claim 5, characterized in that: The web of the steel guide beam (1-2) remains vertical during the connection process.

7. A connection method for misaligned webs of steel guide beams and steel box girders according to claim 6, characterized in that: The web of the steel guide beam (1-2) and the web of the steel box girder (2-2) share the bending moment and shear force, but do not bear the torque.

8. The connection method for misaligned webs of steel guide beams and steel box girders according to claim 7, characterized in that: The method is applicable to bridge structures where the web (2-2) of the steel box girder is inclined.

9. A connection method for misaligned webs of steel guide beams and steel box girders according to claim 8, characterized in that: The method is applicable to the jacking construction of ramp bridges with large curvature or urban overpasses, and the width of the guide beam is adjusted according to the overlap width of the front end of the guide beam.

10. A connection method for misaligned webs of steel guide beams and steel box girders according to claim 9, characterized in that: The enclosed box structure is formed by the steel guide beam web (1-2), the steel box girder web (2-2), the steel box girder end cap (2-3), the stiffening plate (3-1), the steel guide beam top plate (1-1), the steel guide beam bottom plate (1-3), the steel box girder top plate (2-1), and the steel box girder bottom plate (2-4).

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