Guide beam for incremental launching construction of double-layer steel truss girder

Abstract

The utility model discloses a guide beam for incremental launching construction of a double-layer steel truss girder, which belongs to the technical field of incremental launching construction of steel bridges and comprises two main beam components, a truss girder is fixedly mounted between the two main beam components, and connecting pieces for mounting the double-layer steel truss girder are fixedly mounted at the upper end and the lower end of one side of each main beam component. A connecting piece is fixedly installed on the main beam assembly, a nose bridge is fixedly installed at the end, away from the connecting piece, of the main beam assembly, an auxiliary assembly for preventing the main beam assembly from deforming is fixedly installed at the upper end of the main beam assembly, and the two ends of the auxiliary assembly are fixedly connected with the two ends of the main beam assembly. The main beam assembly is simple in structure and convenient to assemble and use on site, and in the using process, inclined upward pulling force is conveniently applied to the overhanging end of the main beam assembly through the auxiliary assembly, so that the phenomenon that the overhanging end droops due to gravity when the overhanging length is too large is reduced, and the using safety and stability are improved.

Description

Technical Field

[0001] The utility model specifically relates to a guide beam for top-pushing construction of a double-layer steel truss beam, and belongs to the technical field of top-pushing construction of steel bridges. Background Art

[0002] The jacking construction method refers to a construction method in which the beam is cast or assembled section by section on the embankment behind the abutment, and is pushed longitudinally with a jacking device so that the beam is put into place through temporary sliding devices on the top of each pier. It is widely used on some existing lines. During the jacking construction, a temporary guide beam needs to be installed at the front end of the component to ensure the longitudinal anti-overturning stability of the beam during movement, and to reduce the overhang length of the beam to reduce the installation stress. It is also widely used in double-layer steel trusses.

[0003] For example, a guide beam for double-layer steel truss jacking construction disclosed in the Chinese utility model patent with announcement number: CN219117971U. The guide beam includes a special main truss, and the special main truss includes a pressure rod assembly and a connecting portion. The connecting portion is connected to the double-layer steel truss, and the end of the pressure rod assembly away from the double-layer steel truss is detachably connected to an extended main truss, and the extended main truss includes a plurality of detachable truss rod units connected end to end. In view of the problems that during the jacking construction of steel bridges, jacking is difficult for bridges with large spans and double-layer steel trusses, the rigid support of the guide beam design in the prior art is weak, the overall stability of the guide beam structure is difficult to ensure, and the guide beam structure has poor flexibility and applicability, a guide beam for double-layer steel truss jacking construction is provided, which has simple assembly operation, good support effect, can bear large loads, has strong deformation control ability, and has a wide range of applications.

[0004] However, when used in locations with larger spans, when the overhang length is too long, the front end will often sag due to the influence of gravity. When the jacking space is small during jacking construction, it is easy to cause conflict between the guide beam and the pier pile, making it inconvenient to use. Utility Model Content

[0005] The utility model aims to solve the deficiencies of the prior art and provide a guide beam for double-layer steel truss girder jacking construction, so as to reduce the sagging of the overhanging front end of the guide beam due to gravity.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a guide beam for double-layer steel truss girder jacking construction, comprising two main beam assemblies, and a truss beam is fixedly installed between the two main beam assemblies, and a connecting piece for installing the double-layer steel truss girder is fixedly installed at the upper end and the lower end of one side of the main beam assembly, and a nose bridge is fixedly installed at one end of the main beam assembly away from the connecting piece, and an auxiliary assembly is fixedly installed on the upper end of the main beam assembly to prevent the main beam assembly from being deformed, and the two ends of the auxiliary assembly are fixedly connected to the two ends of the main beam assembly. When in use, the auxiliary assembly in the utility model is fixedly installed. The main beam assembly and the truss beam are assembled, and the connecting parts are installed according to the specifications of the external double-layer steel truss, and the technical solution is connected to the external double-layer steel truss through the connecting parts to complete the assembly. When the top-pushing construction is carried out, the technical solution is cantilevered forward, and when the cantilever is long, since the main beam assembly is located at one end of the nose bridge and is affected by gravity, when it deforms downward, the nose bridge position is stretched by the auxiliary assembly to reduce the influence of gravity on the deformation, and the force is transmitted to the main beam assembly at one end of the connecting part to improve the stability of use.

[0007] Preferably, the main beam assembly includes a beam body, and a connecting steel of an I-shaped structure is fixedly installed at one end of the beam body, and the connecting piece is fixedly installed on the connecting steel. The connecting steel facilitates the installation of the connecting piece and facilitates assembly.

[0008] Preferably, one side of the connecting steel is provided with connecting holes in a vertical array, and one side of the connecting piece is connected to the connecting holes by external bolts. Through the connecting holes, the position of the connecting piece can be easily adjusted, thereby facilitating the application of double-layer steel trusses of different specifications, and the applicability is strong.

[0009] Preferably, a connecting ring is fixedly installed above one end of the beam body, and one end of the auxiliary component is fixedly installed on the connecting ring. Through the connecting ring, it is convenient to fix one end of the auxiliary component, and then to stretch the position of the connecting ring.

[0010] Preferably, the auxiliary component includes a U-shaped fixing frame, and the fixing frame is welded above one end of the beam body, an oil cylinder is fixedly installed inside the fixing frame, a tensioning block is fixedly installed at one end of the oil cylinder, a tensioning ring is fixedly installed at one end of the tensioning block, a tensioning steel cable is fixedly installed on the tensioning ring, and one end of the tensioning steel cable is fixedly connected to the connecting ring, and the fixing frame can facilitate fixing of the oil cylinder and limiting of the tensioning block, and the tensioning ring can facilitate stretching of the tensioning steel cable, and the tensioning steel cable can facilitate stretching of the connecting ring, thereby reducing the risk of deformation of the overhanging front end due to gravity.

[0011] Preferably, the auxiliary component also includes a column, which is fixedly installed in the middle position of the upper end of the beam body, and a rotating wheel is rotatably installed on the upper end of the column. The tensioning steel cable passes around the rotating wheel and is fixedly connected with the tensioning ring and the connecting ring respectively. Through the column and the rotating wheel, it is convenient to guide the tensioning steel cable, thereby changing the force direction of the cantilevered front end of the beam body during stretching.

[0012] Preferably, waist holes are provided on both sides of one end of the fixing frame, and both ends of the tensioning block are slidably engaged in the inside of the waist holes, so that the tensioning block can be guided conveniently through the waist holes.

[0013] Preferably, sliders are fixedly installed at both ends of the tensioning block, and the tensioning block is slidably engaged inside the waist hole through the sliders. The sliders facilitate the positioning of the tensioning block when it moves, so as to facilitate the application of tension to the tensioning steel cable.

[0014] The beneficial effects of the utility model are as follows: when in use, the assembly between the main beam component and the truss beam facilitates rapid assembly and use on site, and during use, the auxiliary component facilitates the application of an inclined upward pulling force to one end of the overhang of the main beam component, thereby reducing the phenomenon that the overhang end droops due to gravity when the overhang length is too long, thereby improving the safety and stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model from another angle;

[0017] Figure 3 It is a structural schematic diagram of the position of the main beam component in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the main beam assembly in the utility model;

[0019] Figure 5 It is a structural schematic diagram of another angle of the main beam assembly position in the utility model;

[0020] Figure 6 It is a structural schematic diagram of the auxiliary components in the utility model;

[0021] Figure 7 For this utility model Figure 6 Schematic diagram of the structure at position A in the figure.

[0022] In the figure: 1. main beam assembly; 101. beam body; 102. connecting steel; 103. connecting hole; 104. connecting ring; 2. truss beam; 3. connecting piece; 4. nose bridge; 5. auxiliary assembly; 501. fixing frame; 502. oil cylinder; 503. tension block; 504. tension ring; 505. tension steel cable; 506. column; 507. rotating wheel; 508. waist hole; 509. slider. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 7 As shown, a guide beam for double-layer steel truss girder top-pushing construction includes two main beam assemblies 1, and a truss beam 2 is fixedly installed between the two main beam assemblies 1, a connecting piece 3 for installing the double-layer steel truss girder is fixedly installed at the upper and lower ends of one side of the main beam assembly 1, a nose bridge 4 is fixedly installed at one end of the main beam assembly 1 away from the connecting piece 3, an auxiliary assembly 5 for preventing the main beam assembly 1 from deforming is fixedly installed at the upper end of the main beam assembly 1, and the two ends of the auxiliary assembly 5 are fixedly connected to the two ends of the main beam assembly 1. When in use, the main beam assembly 1 and the truss girder 2 in the utility model are connected. The beam 2 is assembled, and the connecting piece 3 is installed according to the specifications of the external double-layer steel truss, and the technical solution is connected to the external double-layer steel truss through the connecting piece 3 to complete the assembly. When the top-pushing construction is carried out, the technical solution is cantilevered forward, and when the cantilever is long, since the main beam component 1 is located at one end of the nose bridge 4 and is affected by gravity, when it deforms downward, the position of the nose bridge 4 is stretched through the auxiliary component 5 to reduce the influence of gravity on the deformation, and the force is transmitted to the main beam component 1 at one end of the connecting piece 3 to improve the stability of use.

[0025] The main beam assembly 1 includes a beam body 101, and one end of the beam body 101 is fixedly installed with a connecting steel 102 of an I-shaped structure, and the connecting member 3 is fixedly installed on the connecting steel 102. Through the connecting steel 102, it is convenient to install the connecting member 3 and to facilitate assembly. One side of the connecting steel 102 is vertically arrayed with connecting holes 103, and one side of the connecting member 3 is connected to the connecting hole 103 by an external bolt. Through the connecting hole 103, it is convenient to adjust the position of the connecting member 3, and then it is convenient to adapt to double-layer steel trusses of different specifications, and the applicability is strong. A connecting ring 104 is fixedly installed on the top of one end of the beam body 101, and one end of the auxiliary component 5 is fixedly installed on the connecting ring 104. Through the connecting ring 104, it is convenient to fix one end of the auxiliary component 5, and then it is convenient to stretch the position of the connecting ring 104.

[0026] The auxiliary component 5 includes a fixed frame 501 of a U-shaped structure, and the fixed frame 501 is welded above one end of the beam body 101, and an oil cylinder 502 is fixedly installed inside the fixed frame 501, and a tensioning block 503 is fixedly installed at one end of the oil cylinder 502, and a tensioning ring 504 is fixedly installed at one end of the tensioning block 503, and a tensioning steel cable 505 is fixedly installed on the tensioning ring 504, and one end of the tensioning steel cable 505 is fixedly connected to the connecting ring 104. Through the fixed frame 501, it is convenient to fix the oil cylinder 502 and limit the tensioning block 503, and through the tensioning ring 504, it is convenient to stretch the tensioning steel cable 505, and through the tensioning steel cable 505, it is convenient to stretch the connecting ring 104, thereby reducing the risk of deformation of the overhanging front end due to gravity. The auxiliary component 5 also includes a column 506, and the column 506 is fixedly installed on the beam At the middle position of the upper end of the body 101, a rotating wheel 507 is rotatably installed on the upper end of the column 506, and the tensioning steel cable 505 passes around the rotating wheel 507 and is fixedly connected to the tensioning ring 504 and the connecting ring 104 respectively. Through the column 506 and the rotating wheel 507, it is convenient to guide the tensioning steel cable 505, thereby changing the force direction of the cantilevered front end of the beam body 101 during tensioning. Waist holes 508 are opened on both sides of one end of the fixed frame 501, and the two ends of the tensioning block 503 are slidably clamped in the inside of the waist hole 508, and the waist hole 508 is convenient to guide the tensioning block 503. Slide blocks 509 are fixedly installed on both ends of the tensioning block 503, and the tensioning block 503 is slidably clamped in the inside of the waist hole 508 through the slider 509. Through the slider 509, it is convenient to limit the tensioning block 503 when moving, so as to facilitate the application of tension to the tensioning steel cable 505.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A guide beam for double-layer steel truss girder top-pushing construction, characterized in that: The invention comprises two main beam assemblies (1), and a truss beam (2) is fixedly installed between the two main beam assemblies (1); a connecting piece (3) for installing a double-layer steel truss beam is fixedly installed at the upper end and the lower end of one side of the main beam assembly (1); a nose bridge (4) is fixedly installed at one end of the main beam assembly (1) away from the connecting piece (3); an auxiliary assembly (5) for preventing the main beam assembly (1) from deformation is fixedly installed at the upper end of the main beam assembly (1), and two ends of the auxiliary assembly (5) are fixedly connected to two ends of the main beam assembly (1).

2. The guide beam for double-layer steel truss jacking construction as claimed in claim 1, characterized in that: The main beam assembly (1) comprises a beam body (101), and a connecting steel (102) of an I-shaped structure is fixedly mounted on one end of the beam body (101), and the connecting piece (3) is fixedly mounted on the connecting steel (102).

3. The guide beam for double-layer steel truss jacking construction as claimed in claim 2, characterized in that: One side of the connecting steel (102) is provided with connecting holes (103) in a vertical array, and one side of the connecting member (3) is connected to the connecting holes (103) by external bolts.

4. The guide beam for double-layer steel truss girder top-pushing construction as claimed in claim 2, characterized in that: A connecting ring (104) is fixedly mounted above one end of the beam body (101), and one end of the auxiliary component (5) is fixedly mounted on the connecting ring (104).

5. The guide beam for double-layer steel truss jacking construction as claimed in claim 4, characterized in that: The auxiliary component (5) comprises a fixed frame (501) of a U-shaped structure, and the fixed frame (501) is welded above one end of the beam body (101), an oil cylinder (502) is fixedly installed inside the fixed frame (501), a tensioning block (503) is fixedly installed at one end of the oil cylinder (502), a tensioning ring (504) is fixedly installed at one end of the tensioning block (503), a tensioning steel cable (505) is fixedly installed on the tensioning ring (504), and one end of the tensioning steel cable (505) is fixedly connected to the connecting ring (104).

6. The guide beam for double-layer steel truss girder top-pushing construction as claimed in claim 5, characterized in that: The auxiliary component (5) also includes a column (506), which is fixedly installed at the middle position of the upper end of the beam body (101), and a rotating wheel (507) is rotatably installed on the upper end of the column (506). The tensioning steel cable (505) passes around the rotating wheel (507) and is fixedly connected to the tensioning ring (504) and the connecting ring (104) respectively.

7. The guide beam for double-layer steel truss jacking construction as claimed in claim 5, characterized in that: Waist holes (508) are provided on both sides of one end of the fixing frame (501), and both ends of the tensioning block (503) are slidably engaged in the inside of the waist holes (508).

8. The guide beam for double-layer steel truss jacking construction as claimed in claim 7, characterized in that: Slide blocks (509) are fixedly mounted on both ends of the tension block (503), and the tension block (503) is slidably engaged in the interior of the waist hole (508) via the slide blocks (509).

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