Prefabricated box girder contact net stand column foundation positioning structure

Abstract

The utility model discloses a prefabricated box girder overhead line system stand column foundation positioning structure. The device comprises a prefabricated box girder bottom formwork, a box girder steel bar arranged above the prefabricated box girder bottom formwork, a heightening assembly arranged in the box girder steel bar, a vertical connecting bar arranged between the heightening assembly and the box girder steel bar, a stand column assembly arranged in the heightening assembly and a positioning frame arranged on the prefabricated box girder bottom formwork. Through the arrangement of the positioning frame, the arrangement of the upper steel plate is guaranteed, the installation and positioning of the contact bolt are improved, and the positioning frame is installed on the prefabricated box girder bottom formwork, so that the firmness of the installation bottom is guaranteed; due to the arrangement of the reinforcing assemblies and the vertical connecting ribs, the integrity of the bottom of the stand column foundation and the box girder is guaranteed, and the strength of the foundation is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of precast box girder construction, and particularly relates to a positioning structure for the foundation of a catenary column of a precast box girder. Background Technique

[0002] During the high-speed construction, when constructing the foundation of the catenary column of the precast box girder on the viaduct, it is necessary to position the contact bolts; during the original construction of the contact bolts, they were mostly positioned manually or by a crane, which wasted time and occupied the site; there was also positioning by steel bar binding, and this method was extremely prone to dislocation during the pouring construction, so it was necessary to design the positioning specifically. Content of the Utility Model

[0003] The utility model provides a positioning structure for the foundation of a catenary column of a precast box girder, which is used to solve technical problems such as the positioning of contact bolts in the foundation of the precast box girder column, the installation of the positioning bracket, and the design of the installation structure.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A positioning structure for the foundation of a catenary column of a precast box girder includes a bottom template of the precast box girder, box girder steel bars arranged above the bottom template of the precast box girder, a heightening component arranged inside the box girder steel bars, vertical connecting bars arranged between the heightening component and the box girder steel bars, a column component arranged inside the heightening component, and a positioning frame arranged on the bottom template of the precast box girder;

[0006] The bottom of the positioning frame is detachably connected to the top of the bottom template of the precast box girder, and an upper steel plate and a lower steel plate are detachably connected to the positioning frame; a contact bolt is fixedly connected between the upper steel plate and the lower steel plate.

[0007] Further, the positioning frame includes positioning columns, a positioning cross beam connected to the top of the positioning columns, and positioning diagonal beams connected between the positioning columns and the positioning cross beam.

[0008] Further, there are two positioning columns, the two positioning columns are arranged in parallel and are detachably connected to the top of the bottom template of the precast box girder through the steel plates at the bottom of the positioning columns.

[0009] Further, the bottom surface of the bottom template of the precast box girder is adapted to the linearity of the box girder and is provided with an upward flanging, and the top of the flanging is connected to the positioning column.

[0010] Further, the positioning cross beams are arranged in parallel, and a positioning horizontal connecting beam is also connected to the side of the positioning cross beam adjacent to the positioning column; the positioning horizontal connecting beam is connected to the top of the positioning column, and the positioning horizontal connecting beam and the positioning cross beam are arranged in a C shape.

[0011] Furthermore, the width between the two positioning beams adapts to the width of the upper steel plate and the length is greater than the length of the upper steel plate. The upper steel plate is provided with steel plate holes, and the steel plate holes are provided corresponding to the contact bolts; a bottom steel plate is provided at the bottom of the contact bolts, and the bottom steel plate is provided in the column foundation.

[0012] Furthermore, the heightening component includes a heightening formwork and heightening steel bars arranged inside the heightening formwork. The heightening formwork is arranged in a U-shape and a column component is arranged at the vertical part; the heightening steel bars are arranged in layered steel bars, and vertical connecting bars are arranged between the heightening steel bars and the box girder steel bars.

[0013] Furthermore, the column assembly includes a support formwork, a group of column horizontal steel bars arranged in the column formwork, and column vertical bars connected between the group of column horizontal steel bars; the column formwork is rectangular, and column vertical bars are arranged at intervals around the rectangle.

[0014] The beneficial effects of the present invention are as follows:

[0015] The present invention facilitates the installation of the upper steel plate by providing a positioning frame, thereby facilitating the installation and positioning of the contact bolts. The positioning frame is installed on the bottom template of the prefabricated box beam, ensuring the firmness of the installation bottom. The present invention facilitates the integrity of the bottom of the column foundation and the box beam by providing a reinforcement assembly and vertical connecting bars, further ensuring the strength of the foundation. Other features and advantages of the present invention will be explained in the subsequent description and will partially become apparent from the description or be understood through the implementation of the present invention. The main purpose and other advantages of the present invention can be achieved and obtained through the solutions specifically pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a construction diagram of the positioning structure of the prefabricated box girder catenary column foundation;

[0017] Figure 2 It is a plan view of the positioning structure of the prefabricated box girder catenary column foundation;

[0018] Figure 3 1. It is a schematic diagram of the positioning frame and its connection structure;

[0019] Figure 4 It is a top view of the positioning frame and its connecting structure.

[0020] Figure markings: 1-prefabricated box girder bottom formwork, 2-box girder reinforcement, 3-heightening assembly, 31-heightening formwork, 32-heightening reinforcement, 4-vertical connecting reinforcement, 5-column assembly, 51-pillar formwork, 52-column horizontal reinforcement, 53-column vertical reinforcement, 6-positioning frame, 61-positioning column, 62-positioning crossbeam, 63-positioning inclined beam, 64-positioning horizontal connecting beam, 7-upper steel plate, 8-bottom steel plate, 9-fixing nut, 10-contact bolt, 11-steel plate hole. DETAILED DESCRIPTION

[0021] Taking the construction of a high-speed railway medium-large bridge as an example, the contact network on the box girder of the bridge body is provided with embedded steel plates and contact bolts connected to the embedded steel plates, such as Figures 1 to 4 As shown, the prefabricated box girder contact network column foundation positioning structure includes a prefabricated box girder bottom formwork 1, a box girder reinforcement 2 arranged above the prefabricated box girder bottom formwork 1, a heightening component 3 arranged inside the box girder reinforcement 2, a vertical connecting bar 4 arranged between the heightening component 3 and the box girder reinforcement 2, a column component 5 arranged inside the heightening component 3, and a positioning frame 6 arranged on the prefabricated box girder bottom formwork 1;

[0022] The bottom of the positioning frame 6 is detachably connected to the top of the prefabricated box beam bottom template 1, and the upper steel plate 7 and the lower steel plate are detachably connected to the positioning frame 6; contact bolts 10 are fixedly connected between the upper steel plate 7 and the lower steel plate.

[0023] In this embodiment, the positioning frame 6 comprises a positioning column 61, a positioning beam 62 connected to the top of the positioning column 61, and a positioning diagonal beam 63 connected between the positioning column 61 and the positioning beam 62. The positioning frame 6 is made of steel pipe. Two positioning columns 61 are provided, arranged in parallel and detachably connected to the top of the precast box girder bottom formwork 1 via a steel plate at the bottom of the positioning columns 61.

[0024] In this embodiment, the bottom surface of the prefabricated box girder bottom template 1 is adapted to the linear arrangement of the box girder and is provided with an upward flange, the top of which is connected to the positioning column 61. The positioning crossbeam 62 is arranged parallel to the positioning column 61, and the side of the positioning crossbeam 62 adjacent to the positioning column 61 is also connected to the positioning horizontal connecting beam 64; the positioning horizontal connecting beam 64 is connected to the top of the positioning column 61, and the positioning horizontal connecting beam 64 and the positioning crossbeam 62 are arranged in a V shape.

[0025] In this embodiment, the width between the two positioning beams 62 is adapted to the width of the upper steel plate 7 and is greater than the length of the upper steel plate 7. The upper steel plate 7 is provided with a steel plate hole 11, which corresponds to the contact bolt 10. The bottom of the contact bolt 10 is provided with a bottom steel plate 8, which is installed in the column foundation. The top of the contact bolt 10 passes through the upper steel plate 7 and is tightened by a fixing nut 9.

[0026] In this embodiment, the heightening assembly 3 comprises a heightening formwork 31 and heightening reinforcement bars 32 disposed within the heightening formwork 31. The heightening formwork 31 is arranged in a V-shape, with column assemblies 5 disposed at the vertical portion. The heightening reinforcement bars 32 are layered, with vertical connecting bars 4 interspersed between the heightening reinforcement bars 32 and the box girder reinforcement bars 2. The column assembly 5 comprises a support formwork 51, a set of horizontal column reinforcement bars 52 disposed within the column formwork, and vertical column reinforcement bars 53 connected between the set of horizontal column reinforcement bars 52. The column formwork is rectangular, with vertical column reinforcement bars 53 interspersed around the perimeter of the rectangle.

[0027] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A prefabricated box girder contact network column foundation positioning structure, characterized in that: It includes a precast box girder bottom formwork (1), box girder steel bars (2) arranged above the precast box girder bottom formwork (1), a heightening component (3) arranged inside the box girder steel bars (2), vertical connecting bars (4) arranged between the heightening component (3) and the box girder steel bars (2), a column component (5) arranged inside the heightening component (3), and a positioning frame (6) arranged on the precast box girder bottom formwork (1); The bottom of the positioning frame (6) is detachably connected to the top of the precast box girder bottom formwork (1), and an upper steel plate (7) and a lower steel plate are detachably connected to the positioning frame (6); A contact bolt (10) is fixedly connected between the upper steel plate (7) and the lower steel plate.

2. A prefabricated box girder contact network column foundation positioning structure according to claim 1, characterized in that: The positioning frame (6) includes positioning columns (61), a positioning cross beam (62) connected to the top of the positioning columns (61), and a positioning inclined beam (63) connected between the positioning columns (61) and the positioning cross beam (62).

3. A prefabricated box girder contact network column foundation positioning structure according to claim 2, characterized in that: There are two positioning columns (61), the two positioning columns (61) are arranged in parallel and are detachably connected to the top of the precast box girder bottom formwork (1) through the steel plate at the bottom of the positioning columns (61).

4. A prefabricated box girder contact network column foundation positioning structure according to claim 3, characterized in that: The bottom surface of the precast box girder bottom formwork (1) is adapted to the linear shape of the box girder and is provided with an upward flanging, and the top of the flanging is connected to the positioning column (61).

5. A prefabricated box girder contact network column foundation positioning structure according to claim 4, characterized in that: The positioning cross beams (62) are arranged in parallel, and a positioning horizontal connecting beam (64) is also connected to the side of the positioning cross beam (62) close to the positioning column (61); The positioning horizontal connecting beam (64) is connected to the top of the positioning column (61), and the positioning horizontal connecting beam (64) and the positioning cross beam (62) are arranged in a U shape.

6. A prefabricated box girder contact network column foundation positioning structure according to claim 5, characterized in that: The width between the two positioning cross beams (62) is adapted to the width of the upper steel plate (7) and the length is greater than the length of the upper steel plate (7). Steel plate holes (LL) are provided on the upper steel plate (7), and the steel plate holes (11) are arranged corresponding to the contact bolts (10); A bottom steel plate (8) is arranged at the bottom of the contact bolt (10), and the bottom steel plate (8) is arranged in the column foundation.

7. The prefabricated box girder contact network column foundation positioning structure according to claim 1, characterized in that: The heightening component (3) includes a heightening formwork (31) and heightening steel bars (32) arranged inside the heightening formwork (31). The heightening formwork (31) is arranged in a U shape and a column component (5) is arranged at the vertical part; The heightening steel bars (32) are arranged in layers of steel bars, and vertical connecting bars (4) are arranged at intervals between the heightening steel bars (32) and the box girder steel bars (2).

8. The prefabricated box girder contact network column foundation positioning structure according to claim 1, characterized in that: The column component (5) includes a column formwork (51), a group of column horizontal steel bars (52) arranged inside the column formwork, and column vertical bars (53) connected between the group of column horizontal steel bars (52); The column formwork is rectangular, and column vertical bars (53) are arranged at intervals around the rectangle.

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