New and old bridge joint steel bar structure for simplifying construction

Abstract

The utility model relates to a new and old bridge joint reinforcing steel bar structure for simplifying construction. The new and old bridge joint reinforcing steel bar structure comprises a wing plate, a lap joint stirrup fixed to the edge of the wing plate, a lap joint longitudinal bar arranged in the lap joint stirrup, a joint stirrup connected with the lap joint longitudinal bar and a joint longitudinal bar fixed in the joint stirrup. The joint stirrups are fixedly connected with the joint longitudinal bars to form a joint reinforcement cage; the lap joint longitudinal bars comprise upper-layer longitudinal bars and lower-layer longitudinal bars, the upper-layer longitudinal bars are placed on the joint stirrups to form lap joint stirrups, and the upper-layer longitudinal bars and the joint stirrups are stacked; the lower-layer longitudinal bars are placed on the lap joint stirrups; the joint stirrups and the lap joint stirrups are of a staggered double-ring structure. Compared with the prior art, the novel construction mode that the lap joint stirrups and the joint stirrups are staggered in a double-ring mode is adopted, the joint stirrups can be conveniently placed, longitudinal bars can be conveniently bound, and the construction efficiency of new and old bridge joint steel bars on site is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a new and old bridge joint steel bar structure for simplifying construction. Background Art

[0002] With the continuous improvement of the current national living standards, the deck widths of many urban arterial bridges built in the early days are gradually difficult to meet the increasing urban traffic flow. At the same time, the bearing capacity of the old bridges can still meet the structural stress requirements, and the economic efficiency of the demolition and reconstruction projects is poor. Therefore, the reconstruction and expansion of bridge construction projects have gradually become the mainstream in urban bridge construction.

[0003] To ensure less disturbance to the urban environment during the construction process, precast hoisting construction is generally adopted for the new bridge, and the new bridge and the old bridge are not closely attached during the hoisting process. On the one hand, too high hoisting accuracy will greatly reduce the construction efficiency, and on the other hand, it is also to ensure the safety of the construction site and prevent the new and old bridges from colliding. Therefore, after the new bridge is hoisted, it is necessary to lap the joint steel bars on site and pour them on site.

[0004] The traditional joint steel bar structure is generally tied up before the new bridge is hoisted, but during the subsequent placement of the joint stirrups, it will be affected by the lap steel bar skeleton reserved on the wing slab of the new bridge, greatly reducing the construction efficiency.

[0005] Therefore, there is an urgent need to construct a new and old bridge joint steel bar structure that can improve the construction efficiency and does not reduce the joint structure strength. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the defects of the above-mentioned existing technologies and provide a new and old bridge joint steel bar structure for simplifying construction. By adopting a new structure method of double-ring staggering for the lap stirrups and the joint stirrups, it is convenient for the placement of the joint stirrups and the tying of the longitudinal bars, greatly improving the construction efficiency of the new and old bridge joint steel bars on site.

[0007] The purpose of the utility model can be realized by the following technical solutions:

[0008] The utility model provides a new and old bridge joint steel bar structure for simplifying construction, including a wing slab, lap stirrups fixed to the edge of the wing slab, lap longitudinal bars placed inside the lap stirrups, joint stirrups connected to the lap longitudinal bars, and joint longitudinal bars fixed inside the joint stirrups;

[0009] The joint stirrups are fixedly connected to the joint longitudinal bars to form a joint steel bar skeleton;

[0010] The lapped longitudinal bars include upper longitudinal bars and lower longitudinal bars. The upper longitudinal bars are placed on the joint stirrups to form a stack of lapped stirrups, upper longitudinal bars, and joint stirrups; the lower longitudinal bars are placed on the lapped stirrups.

[0011] The joint stirrups and the lapped stirrups are in an alternating double-ring structure.

[0012] Furthermore, the lapped stirrups are the reserved bars of the wing plate, and the lapped stirrups and the wing plate are in an integral structure.

[0013] Furthermore, several lapped stirrups are equidistantly arranged on the side of the wing plate, and several lapped stirrups and joint stirrups are arranged alternately.

[0014] Furthermore, several joint stirrups are equidistantly arranged on the side of the wing plate, and the lengths of several joint stirrups are the same.

[0015] Furthermore, the distance between the upper edge of the joint stirrups and the upper edge of the lapped stirrups is the sum of the diameter of the lapped stirrups and the diameter of the upper longitudinal bars.

[0016] Furthermore, the upper longitudinal bars and the lower longitudinal bars are arranged in parallel inside the joint stirrups.

[0017] Furthermore, there are a total of four joint longitudinal bars. Two joint longitudinal bars are tied and welded at the corners of the joint longitudinal bars, and two joint longitudinal bars are symmetrically tied and welded at the upper edge and the lower edge inside the joint longitudinal bars.

[0018] Furthermore, both the lapped stirrups and the joint stirrups are U-shaped, and the openings of the lapped stirrups and the joint stirrups are fixed on one side of the wing plate.

[0019] Furthermore, the fixed height of the joint stirrups on the wing plate is lower than the height of the lapped stirrups, so that the joint steel bar skeleton formed by the joint stirrups and the joint longitudinal bars can rotate up and down.

[0020] Furthermore, the protruding length of the joint stirrups on one side of the wing plate is greater than the protruding length of the lapped stirrups.

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

[0022] In the utility model, by adopting a new structural method of double-ring intersection for the lapped stirrups and the joint stirrups, it is convenient for the placement of the joint stirrups and the tying of the longitudinal bars, greatly improving the construction efficiency of the joint steel bars of the new and old bridges on site. In addition, it also solves the problem that it is difficult to place the joint stirrups in the on-site construction of the joint, and can improve the joint construction efficiency without reducing the joint structure strength, thus improving the economic benefits. Brief Description of the Drawings

[0023] Figure 1Schematic diagram of the steel bar structure at the joint between a new bridge and an old bridge for simplifying construction;

[0024] Figure 2 Construction schematic diagram of the overlapping longitudinal bars of the new bridge in Embodiment 1;

[0025] Figure 3 Schematic diagram of the steel bar skeleton at the joint in Embodiment 1;

[0026] Figure 4 Schematic diagram of the placement of steel bars during the implementation process in Embodiment 1.

[0027] Explanation of the reference numerals in the figure:

[0028] 1 - Upper layer longitudinal bars, 2 - Lower layer longitudinal bars, 3 - Overlapping stirrups, 4 - Joint longitudinal bars, 5 - Joint stirrups, 6 - Flange. Detailed implementation manners

[0029] The following further elaborates on the specific implementation manners of the present utility model through embodiments. These embodiments are implemented on the premise of the solution described in the present utility model, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0030] The following further elaborates on the present utility model in combination with the attached drawings and specific embodiments. Features such as component models, material names, connection structures, preparation means, materials, structures, or composition ratios that are not clearly stated in the present technical solution are regarded as common technical features disclosed in the prior art.

[0031] Embodiment 1

[0032] This embodiment provides a steel bar structure at the joint between a new bridge and an old bridge for simplifying construction, as shown in Figure 1 and Figure 4 , which includes a flange 6, overlapping stirrups 3 fixed to the edge of the flange, overlapping longitudinal bars placed inside the overlapping stirrups 3, joint stirrups 5 connected to the overlapping longitudinal bars, and joint longitudinal bars 4 fixed inside the joint stirrups 5. The joint stirrups 5 and the overlapping stirrups 3 are in an alternating double-ring structure. Both the overlapping stirrups 3 and the joint stirrups 5 are U-shaped, and the openings of the joint stirrups 5 and the overlapping stirrups 3 are fixed to one side of the flange 6. A number of overlapping stirrups 3 are equidistantly arranged on the side of the flange 6, and a number of overlapping stirrups 3 and the joint stirrups 5 are arranged alternately.

[0033] As shown in Figure 3As shown, the joint stirrup 5 is fixedly connected to the joint longitudinal reinforcement 4 to form a joint steel bar framework. A number of joint stirrups 5 are equidistantly arranged on the side of the wing plate 6, and the lengths of the number of joint stirrups 5 are the same. The distance between the upper edge of the joint stirrup 5 and the upper edge of the lapping stirrup 3 is the sum of the diameters of the lapping stirrup 33 and the upper layer longitudinal reinforcement 1. The upper layer longitudinal reinforcement 1 and the lower layer longitudinal reinforcement 2 are arranged in parallel inside the joint stirrup 5. There are four joint longitudinal reinforcements 4 in total. Two joint longitudinal reinforcements 4 are tied and welded at the corners of the joint longitudinal reinforcement 4, and two joint longitudinal reinforcements 4 are symmetrically tied and welded at the upper edge and the lower edge inside the joint longitudinal reinforcement 4.

[0034] As Figure 2 shown, the lapping longitudinal reinforcement includes the upper layer longitudinal reinforcement 1 and the lower layer longitudinal reinforcement 2. The upper layer longitudinal reinforcement 1 is placed on the joint stirrup 5 to form a stack of the lapping stirrup 3, the upper layer longitudinal reinforcement 1 and the joint stirrup 5. The lower layer longitudinal reinforcement 2 is placed on the lapping stirrup 3. The lapping stirrup 3 is the reserved steel bar of the wing plate 6, and the lapping stirrup 3 and the wing plate 6 are of an integral structure. The upper layer longitudinal reinforcement 1 is placed on the joint stirrup 5, and the lower layer longitudinal reinforcement 2 is placed on the lapping stirrup 3. The fixed height of the joint stirrup 5 on the wing plate 6 is lower than the height of the lapping stirrup 3. The protruding length of the joint stirrup 5 on one side of the wing plate 6 is greater than the protruding length of the lapping stirrup 3.

[0035] The joint steel bar framework formed by the joint stirrup 5 and the joint longitudinal reinforcement 4 can rotate up and down at an angle of 5° in the whole steel bar structure system, facilitating the left-right movement of the upper layer longitudinal reinforcement 1 and the lower layer longitudinal reinforcement 2.

[0036] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the utility model according to the disclosure of the utility model should be within the protection scope of the utility model.

Claims

1. A new-old bridge joint steel bar structure for simplifying construction, characterized in that It includes a wing plate (6), lapping stirrups (3) fixed to the edge of the wing plate, lapping longitudinal bars placed inside the lapping stirrups, joint stirrups (5) connected to the lapping longitudinal bars, and joint longitudinal bars (4) fixed inside the joint stirrups (5); The joint stirrups (5) are fixedly connected to the joint longitudinal bars (4) to form a joint steel bar skeleton; The lapping longitudinal bars include upper layer longitudinal bars (1) and lower layer longitudinal bars (2). The upper layer longitudinal bars (1) are placed on the joint stirrups (5) so that the lapping stirrups (3), upper layer longitudinal bars (1), and joint stirrups (5) are stacked; the lower layer longitudinal bars (2) are placed on the lapping stirrups (3); The joint stirrups (5) and the lapping stirrups (3) are in an alternating double-ring structure.

2. The new and old bridge joint steel bar structure for simplifying construction according to claim 1, characterized in that The lapping stirrups (3) are reserved steel bars of the wing plate (6), and the lapping stirrups (3) and the wing plate (6) are of an integral structure.

3. A new and old bridge joint steel bar structure for simplifying construction according to claim 1, characterized in that, A number of the lapping stirrups (3) are equidistantly arranged on the side of the wing plate (6), and the number of lapping stirrups (3) and the joint stirrups (5) are arranged alternately.

4. A new and old bridge joint steel bar structure for simplifying construction according to claim 1, characterized in that, A number of the joint stirrups (5) are equidistantly arranged on the side of the wing plate (6), and the lengths of the number of joint stirrups (5) are the same.

5. The steel bar structure for the joint between a new bridge and an old bridge for simplifying construction according to claim 1, wherein The distance between the upper edge of the joint stirrups (5) and the upper edge of the lapping stirrups (3) is the sum of the diameters of the lapping stirrups (3) and the upper layer longitudinal bars (1).

6. The new and old bridge joint steel bar structure for simplifying construction according to claim 1, characterized in that, The upper layer longitudinal bars (1) and the lower layer longitudinal bars (2) are arranged in parallel inside the joint stirrups (5).

7. A new and old bridge joint steel bar structure for simplifying construction according to claim 1, characterized in that, There are a total of four joint longitudinal bars (4). Two joint longitudinal bars (4) are tied and welded at the corners of the joint longitudinal bars (4), and two joint longitudinal bars (4) are symmetrically tied and welded at the upper edge and the lower edge inside the joint longitudinal bars (4).

8. A new-old bridge joint steel bar structure for simplifying construction according to claim 1, characterized in that, Both the lapping stirrups (3) and the joint stirrups (5) are U-shaped, and the openings of the joint stirrups (5) and the lapping stirrups (3) are fixed to one side of the wing plate (6).

9. A new and old bridge joint steel bar structure for simplifying construction according to claim 1, characterized in that The fixed height of the joint stirrups (5) on the wing plate (6) is lower than the height of the lapping stirrups (3) so that the joint steel bar skeleton formed by the joint stirrups (5) and the joint longitudinal bars (4) can rotate up and down.

10. A new-old bridge joint steel bar structure for simplifying construction according to claim 1, characterized in that, The protruding length of the joint stirrups (5) on one side of the wing plate (6) is greater than the protruding length of the lapping stirrups (3).

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