Concrete structure for assembled bridge and construction method thereof

Abstract

The present invention relates to the technical field of bridge engineering, and specifically to a concrete structure and construction method for assembled bridges; the technical scheme adopted is: a concrete structure for assembled bridges, including an upper structure and a lower structure, the lower end of the upper structure is provided with a connecting rod extending along the length direction of the upper structure and a plurality of first connecting bars distributed in a circular shape; the connecting rod is located in a circle surrounded by the first connecting bars, the lower end of the first connecting bar is bent toward the upper end of the connecting rod, and the lower part of the first connecting bar is connected to the connecting rod through a tie bar; the upper end of the lower structure is provided with a blind hole and an annular bar, the connecting rod is inserted in the blind hole, and the lower end of the first connecting bar is hooked on the annular bar by the relative movement of the upper structure and the connecting rod; the gap between the lower end of the upper structure and the upper end of the lower structure is filled with a grouting body. The present invention can improve the assembly efficiency of the piers of assembled bridges and ensure the structural strength of the piers, and has the characteristics of convenient assembly and high structural strength.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to a concrete structure for an assembled bridge and a construction method thereof. Background Art

[0002] Prefabricated bridges are the development trend of bridge engineering construction, but the existing prefabricated bridge lower pier structure is mainly based on on-site support casting. For prefabricated piers, the bridge piers are mainly prefabricated in sections in factories or construction sites, and then transported to the site for assembly and molding. The assembly joint structure of prefabricated bridge piers is the most critical. It must be firm, safe, economical and beautiful, and the structure must be simple and easy to assemble and construct. Commonly used bridge pier assembly joints include socket joints, steel anchor joints, welding joints, buckle joints, flange joints, prestressed joints or combination joints of the above methods, which are determined by the scale of the bridge pier, stress conditions and construction conditions. Among them, the more commonly used steel anchor joints use reserved steel bars or steel sections on the component, insert them into the reserved groove of another component, or weld the steel bars to each other, and then pour semi-dry hard concrete; there are disadvantages such as large amount of steel bar welding, small welding space, labor-intensive and time-consuming, and low structural strength. Summary of the invention

[0003] In view of the technical problems of low connection efficiency and low structural strength of the existing prefabricated bridge piers, the present invention provides a concrete structure and construction method for a prefabricated bridge, which can improve the assembly efficiency of the piers of the prefabricated bridge and ensure the structural strength of the piers, and has the characteristics of easy assembly and high structural strength.

[0004] The present invention is achieved through the following technical solutions:

[0005] A concrete structure for an assembled bridge comprises an upper structure and a lower structure, wherein a connecting rod and a plurality of first connecting bars distributed in a circular shape are provided at the lower end of the upper structure, wherein the first connecting bars and the connecting rod extend along the length direction of the upper structure; the connecting rod is located in a circle surrounded by the first connecting bars, wherein the lower end of the first connecting bar is bent toward the upper end of the connecting rod, and the lower part of the first connecting bar is connected to the connecting rod through a tension bar; a blind hole and an annular bar are provided at the upper end of the lower structure, wherein the connecting rod is inserted into the blind hole, and the lower end of the first connecting bar is hooked on the annular bar by the relative movement of the upper structure and the connecting rod; and the gap between the lower end of the upper structure and the upper end of the lower structure is filled with a grouting body.

[0006] The lower end of the first connecting bar of the present invention is bent toward the upper end of the connecting rod. When the upper structure is hoisted on the upper end of the lower structure, the lower end of the connecting rod is first inserted into the blind hole, and the first connecting bar moves toward the ring bar at the same time; when the lower end of the connecting rod abuts against the bottom of the blind hole, the connecting rod stops moving downward, while the upper structure continues to move downward, that is, the upper structure and the connecting rod move relative to each other, so that the lower end of the first connecting bar is hooked on the ring bar, and the gap between the lower end of the upper structure and the upper end of the lower structure is filled with a grouting body to complete the connection between the upper and lower structures and the internal steel bars of the lower structure.

[0007] Since the lower end of the first connecting rib is hooked on the annular rib, and the lower part of the first connecting rib is fixedly connected to the connecting rod through the tension bar, the structure of the bicycle wheel is formed, which can realize the connection of the internal steel bars of the upper structure and the lower structure. The greater the gravity of the upper structure and the bridge structure placed above the upper structure, the more stable the connection. Compared with the welding method, the connection is simple and convenient, and the assembly efficiency is high. And by filling the gap between the lower end of the upper structure and the upper end of the lower structure with grouting to wrap and fix the first connecting rib, tension bar, annular rib and connecting rod, the structural strength of the pier of the assembled bridge can be ensured. In addition, the connecting rod also plays a role of guiding and positioning, and there is no need to repeatedly adjust the position of the upper structure and the lower structure during construction, which can further improve the efficiency of assembly construction.

[0008] Preferably, a sliding hole is provided at the lower end of the upper structure; the sliding hole is arranged concentrically with the circle surrounded by the first connecting rib, the upper end of the connecting rod is inserted into the sliding hole, and the connecting rod can slide along the length direction of the sliding hole. So that the two ends of the connecting rod are respectively arranged in the upper structure and the lower structure, the shear resistance of the pier of the assembled bridge is improved, and the structural strength of the pier of the assembled bridge is further improved.

[0009] Preferably, a sliding cylinder is embedded in the lower end of the upper structure, and the upper end of the sliding cylinder is closed to form a sliding hole. The side wall of the sliding cylinder is provided with a plurality of anchoring ribs, which can facilitate the construction of the sliding hole and ensure that the sliding hole has sufficient strength. Compared with directly opening a blind hole in the upper structure, it can better prevent the sliding hole from cracking due to shear force, thereby ensuring the structural strength of the piers of the prefabricated bridge.

[0010] Similarly, a connecting tube is embedded in the upper end of the lower structure, and the lower end of the connecting tube is closed to form a blind hole; a plurality of anchor bars are arranged on the side wall of the connecting tube.

[0011] Preferably, the inner hole at the upper end of the connecting tube is a tapered hole to provide guidance for the connecting rod, so as to quickly insert the lower end of the connecting rod into the blind hole, thereby improving the lifting efficiency of the upper structure and the lower structure.

[0012] Furthermore, a plurality of second connecting ribs distributed in a circular shape are provided at the upper end of the lower structure, a plurality of sleeve holes are provided at the lower end of the upper structure, and the upper ends of the second connecting ribs are inserted into the sleeve holes to increase the second connecting ribs to connect the upper structure and the lower structure, thereby further improving the structural strength of the piers of the prefabricated bridge.

[0013] As a specific implementation of the sleeve hole, the sleeve hole is an inner hole of a sleeve embedded in the upper structure, so as to facilitate the construction of the sleeve hole and ensure that the sleeve hole has sufficient structural strength.

[0014] Preferably, the connecting rod is a hollow rod to ensure that the connecting rod has sufficient rigidity.

[0015] The construction method of the present invention comprises the following steps:

[0016] Obtain the upper structure and the lower structure;

[0017] The lower end of the lower structure is fixedly connected to the foundation pile of the pier column;

[0018] Hoist the lower end of the upper structure onto the upper end of the lower structure;

[0019] A grouting mold is provided outside the lower end of the upper structure and the upper end of the lower structure;

[0020] The grouting mold is poured with concrete to form a grouting body to complete the construction.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] 1. The lower end of the first connecting rib of the present invention is bent toward the upper end of the connecting rod. When the lower end of the connecting rod abuts against the bottom of the blind hole, the connecting rod stops moving downward, while the lower structure continues to move downward, that is, the upper structure and the connecting rod move relative to each other, so that the lower end of the first connecting rib is hooked on the annular rib. The gap between the lower end of the upper structure and the upper end of the lower structure is filled with grouting to complete the connection between the upper and lower structures and the internal steel bars of the lower structure. Compared with welding, the connection is simple and convenient, and the assembly efficiency is high.

[0023] 2. The gap between the lower end of the upper structure and the upper end of the lower structure is filled with grouting to wrap and fix the first connecting reinforcement, tension reinforcement, annular reinforcement and connecting rod, which can ensure the structural strength of the pier of the prefabricated bridge. In addition,

[0024] 3. The connecting rod also plays a guiding and positioning role. There is no need to repeatedly adjust the position of the upper structure and the lower structure during construction, which can further improve the efficiency of assembly construction.

[0025] 4. The upper end of the connecting rod is inserted into the sliding hole, and the connecting rod can slide along the length direction of the sliding hole. The two ends of the connecting rod are respectively arranged in the upper structure and the lower structure, thereby improving the shear resistance of the pier of the assembled bridge and further improving the structural strength of the pier of the assembled bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the upper structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the lower structure of the present invention.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] 1-upper structure, 2-lower structure, 3-connecting rod, 4-first connecting rib, 5-tension bar, 6-blind hole, 7-annular rib, 8-grouting body, 9-sliding hole, 10-sliding cylinder, 11-connecting cylinder, 12-second connecting rib, 13-sleeve hole, 14-sleeve. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0033] Example

[0034] A concrete structure for an assembled bridge comprises an upper structure 1 and a lower structure 2, wherein a connecting rod 3 and a plurality of first connecting ribs 4 distributed in a circular shape are provided at the lower end of the upper structure 1, wherein the first connecting ribs 4 and the connecting rod 3 extend along the length direction of the upper structure 1; the connecting rod 3 is located in a circle surrounded by the first connecting ribs 4, wherein the lower end of the first connecting rib 4 is bent toward the upper end of the connecting rod 3, and the lower part of the first connecting rib 4 is connected to the connecting rod 3 via a tension bar 5; a blind hole 6 and an annular rib 7 are provided at the upper end of the lower structure 2, wherein the connecting rod 3 is inserted into the blind hole, and the lower end of the first connecting rib 4 is hooked on the annular rib 7 by the relative movement of the upper structure 1 and the connecting rod 3; and a gap between the lower end of the upper structure 1 and the upper end of the lower structure 2 is filled with a grouting body 8.

[0035] The lower end of the first connecting rib 4 of the present invention is bent toward the upper end of the connecting rod 3. When the upper structure 1 is hoisted on the upper end of the lower structure 2, the lower end of the connecting rod 3 is first inserted into the blind hole 6, and the first connecting rib 4 moves toward the annular rib 7; when the lower end of the connecting rod 3 abuts against the bottom of the blind hole 6, the connecting rod 3 stops moving downward, while the upper structure 1 continues to move downward, that is, the upper structure 1 and the connecting rod 3 move relative to each other, so that the lower end of the first connecting rib 4 is hooked on the annular rib 7, and the gap between the lower end of the upper structure 1 and the upper end of the lower structure 2 is filled with the grouting body 8 to complete the connection of the upper and lower structures 2 and the internal steel bars of the lower structure 2.

[0036] Since the lower end of the first connecting rib 4 is hooked on the annular rib 7, and the lower part of the first connecting rib 4 is fixedly connected to the connecting rod 3 through the tie rod 5, the structure of the bicycle wheel is formed, which can realize the connection of the internal steel bars of the upper structure 1 and the lower structure 2. The greater the gravity of the upper structure 1 and the bridge structure placed above the upper structure 1, the more stable the connection. Compared with the welding method, the connection is simple and convenient, and the assembly efficiency is high. And the gap between the lower end of the upper structure 1 and the upper end of the lower structure 2 is filled by the grouting body 8 to wrap and fix the first connecting rib 4, the tie rod 5, the annular rib 7 and the connecting rod 3, which can ensure the structural strength of the pier of the assembled bridge. In addition, the connecting rod 3 also plays a role in guiding and positioning, and there is no need to repeatedly adjust the position of the upper structure 1 and the lower structure 2 during construction, which can further improve the efficiency of assembly construction.

[0037] Preferably, a sliding hole 9 is provided at the lower end of the upper structure 1; the sliding hole 9 is arranged concentrically with the circle surrounded by the first connecting rib 4, and the upper end of the connecting rod 3 is inserted into the sliding hole 9, and the connecting rod 3 can slide along the length direction of the sliding hole 9. So that the two ends of the connecting rod 3 are respectively arranged in the upper structure 1 and the lower structure 2, the shear resistance of the pier of the assembled bridge is improved, and the structural strength of the pier of the assembled bridge is further improved.

[0038] Preferably, a slide cylinder 10 is embedded in the lower end of the upper structure 1, and the upper end of the slide cylinder 10 is closed to form a slide hole 9. The side wall of the slide cylinder 10 is provided with a plurality of anchor bars, which can facilitate the construction of the slide hole 9 and ensure that the slide hole 9 has sufficient strength. Compared with directly opening a blind hole 6 in the upper structure 1, it can better prevent the slide hole 9 from cracking due to shear force, thereby ensuring the structural strength of the piers of the prefabricated bridge.

[0039] Similarly, a connecting tube 11 is embedded in the upper end of the lower structure 2, and the lower end of the connecting tube 11 is closed to form a blind hole 6; a plurality of anchor bars are provided on the side wall of the connecting tube 11.

[0040] Preferably, the inner hole at the upper end of the connecting tube 11 is a tapered hole to provide guidance for the connecting rod 3 so as to quickly insert the lower end of the connecting rod 3 into the blind hole 6, thereby improving the lifting efficiency of the upper structure 1 and the lower structure 2.

[0041] Furthermore, the upper end of the lower structure 2 is provided with a plurality of second connecting ribs 12 distributed in a circular shape, and the lower end of the upper structure 1 is provided with a plurality of sleeve holes 13. The upper ends of the second connecting ribs 12 are inserted into the sleeve holes 13 to increase the second connecting ribs 12 to connect the upper structure 1 and the lower structure 2, thereby further improving the structural strength of the piers of the prefabricated bridge.

[0042] As a specific implementation of the sleeve hole 13 , the sleeve hole 13 is an inner hole of a sleeve 14 embedded in the upper structure 1 , so as to facilitate the construction of the sleeve hole 13 and ensure that the sleeve hole 13 has sufficient structural strength.

[0043] Preferably, the connecting rod 3 is a hollow rod to ensure that the connecting rod 3 has sufficient rigidity.

[0044] In addition, in order to further improve the structural strength of the assembled bridge pier, the lower end of the upper structure 1 and the upper end of the lower structure 2 are both concave, so that the two ends of the grouting body 8 are inserted into the upper structure 1 and the lower structure 2 respectively.

[0045] The construction method of this embodiment:

[0046] The slide tube 10, the sleeve 14 and the first connecting rib 4 are placed in the casting mold cavity of the upper body 1, and the connecting tube 11, the second connecting rib 12 and the root rib of the ring rib 7 are placed in the casting mold cavity of the lower body 2, and the upper body 1 and the lower body 2 are cast.

[0047] The lower end of the lower structure 2 is fixedly connected to the foundation pile of the pier column. Of course, the lower structure 2 and the foundation pile of the pier column can also be cast in one piece according to the actual construction situation;

[0048] The upper structure 1 is lifted by a crane, a tower crane or other lifting equipment, and then the lower end of the connecting rod 3 is inserted into the blind hole 6, so that the lower end of the upper structure 1 is lifted on the upper end of the lower structure 2;

[0049] A grouting mold is provided outside the lower end of the upper structure 1 and the upper end of the lower structure 2;

[0050] The grouting mold is poured with concrete to form a grouting body 8 to complete the construction.

[0051] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A concrete structure for an assembled bridge, comprising an upper structure (1) and a lower structure (2), characterized in that: A connecting rod (3) and a plurality of first connecting ribs (4) distributed in a circular shape are provided at the lower end of the upper structure (1), wherein the first connecting ribs (4) and the connecting rod (3) extend along the length direction of the upper structure (1); The connecting rod (3) is located within a circle surrounded by the first connecting ribs (4); the lower end of the first connecting ribs (4) is bent toward the upper end of the connecting rod (3); and the lower end of the first connecting ribs (4) is connected to the connecting rod (3) via a tension rib (5); The upper end of the lower structure (2) is provided with a blind hole (6) and a ring rib (7), and the connecting rod (3) is inserted in the blind hole; The gap between the lower end of the upper structure (1) and the upper end of the lower structure (2) is filled with a grouting body (8); The lower end of the upper structure (1) is provided with a sliding hole (9); The sliding hole (9) is arranged concentrically with the circle enclosed by the first connecting rib (4), the upper end of the connecting rod (3) is inserted into the sliding hole (9), and the connecting rod (3) can slide along the length direction of the sliding hole (9); A connecting tube (11) is embedded in the upper end of the lower structure (2), and the lower end of the connecting tube (11) is closed to form a blind hole (6); When the lower end of the connecting rod (3) abuts against the bottom of the blind hole (6), the connecting rod (3) stops moving downward and the upper structure (1) continues to move downward, so that the lower end of the first connecting rib (4) is hooked on the annular rib (7).

2. The concrete structure for a prefabricated bridge according to claim 1, characterized in that: A slide cylinder (10) is embedded in the lower end of the upper structure (1), the upper end of the slide cylinder (10) is closed to form a slide hole (9), and a plurality of anchor ribs are provided on the side wall of the slide cylinder (10).

3. The concrete structure for a prefabricated bridge according to claim 1, characterized in that: The side wall of the connecting tube (11) is provided with a plurality of anchor bars.

4. The concrete structure for a prefabricated bridge according to claim 1, characterized in that: The inner hole at the upper end of the connecting tube (11) is a tapered hole.

5. The concrete structure for a prefabricated bridge according to claim 1, characterized in that: The upper end of the lower structure (2) is also provided with a plurality of second connecting ribs (12) distributed in a circular shape, and the lower end of the upper structure (1) is provided with a plurality of sleeve holes (13), and the upper ends of the second connecting ribs (12) are inserted into the sleeve holes (13).

6. The concrete structure for a prefabricated bridge according to claim 5, characterized in that: The sleeve hole (13) is the inner hole of a sleeve (14) embedded in the upper structure (1).

7. The concrete structure for a prefabricated bridge according to claim 1, characterized in that: The connecting rod (3) is a hollow rod.

8. A method for constructing a concrete structure of an assembled bridge, characterized in that: The method for constructing a concrete structure for a prefabricated bridge according to any one of claims 1 to 7 comprises the following steps: Obtaining an upper structure (1) and a lower structure (2); The lower end of the lower structure (2) is fixedly connected to the foundation pile; The lower end of the upper structure (1) is hoisted onto the upper end of the lower structure (2); A grouting mold is provided outside the lower end of the upper structure (1) and the upper end of the lower structure (2); The grouting mold is poured with concrete to form a grouting body (8) to complete the construction.

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