Reinforcing and lengthening structure of cantilever beam

Abstract

The utility model relates to a reinforcing structure, and belongs to the technical field of cantilever beam construction, in particular to a reinforcing and lengthening structure of a cantilever beam, which comprises a tongue-and-groove arranged on a primary beam, a plurality of lengthening steel bars are welded and fixed at the tongue-and-groove, reinforcing stirrups are arranged on the surfaces of the lengthening steel bars, and the reinforcing stirrups are arranged on the surfaces of the lengthening steel bars. The outer ends of the extension steel bars are fixedly connected with row face steel bars, pouring formworks are arranged at the tongue-and-groove positions, and the extension steel bars, the reinforcing stirrups and the row face steel bars are all located in the pouring formworks. According to the utility model, the tongue-and-groove is chiseled at the end part of the original cantilever beam, so that the effect of preventing the occurrence of vertical through cracks at new and old concrete positions is achieved on the premise of ensuring the reinforcing strength, and the problem that the vertical through cracks at the new and old concrete positions are easy to occur due to poor stress at the chiseled part in the traditional cantilever beam extension is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cantilever beam construction, in particular to a cantilever beam reinforcement and extension structure. Background Art

[0002] A cantilever beam refers to a beam that is not supported at both ends. One end is buried or cast in a support, and the other end extends out of the support. According to actual construction needs and construction standards, during the construction process, it is often necessary to reinforce and lengthen the cantilever beam to meet construction needs.

[0003] In the prior art, conventional cantilever beam extensions are achieved by chiseling away part of the concrete at the end and then welding, tying steel bars and pouring concrete. However, in this method, the joints are generally chiseled into vertical construction joints, so the stress is poor and vertical through cracks are prone to occur at the positions of new and old concrete. Therefore, a cantilever beam reinforcement extension structure is proposed to solve the above problem. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes a reinforcement and extension structure of a cantilever beam, which prevents vertical through cracks from occurring at the new and old concrete positions while ensuring the reinforcement strength by chiseling a tongue and groove at the end of the original cantilever beam.

[0005] The technical solution for achieving the purpose of the utility model is: a reinforcement and extension structure of a cantilever beam, including a tongue and groove opened on the original beam, a plurality of extension steel bars are welded and fixed at the tongue and groove, the surface of the extension steel bars is provided with reinforcement stirrups, the outer ends of the extension steel bars are fixedly connected with facing steel bars, a casting formwork is provided at the tongue and groove, and the extension steel bars, reinforcement stirrups and facing steel bars are all inside the casting formwork.

[0006] In certain embodiments, one end of the extension steel bar is fixed to the casting template, the inner wall of the casting template is provided with supporting steel bars, and the surface steel bars surround the supporting steel bars in a surrounding shape.

[0007] Compared with the prior art, the utility model has the following significant advantages:

[0008] The utility model uses the method of chiseling tongue and groove on the original beam to overlap and weld the extended steel bars to the original cantilever beam steel bars on one side, arranges reinforcing stirrups near the end, welds the surface steel bars according to needs, and finally carries out formwork support and concrete pouring. Compared with the traditional vertical chiseling method, this extension method can enhance the force safety between the original beam and the extended beam, and prevent the problem of vertical through cracks at the position of the new and old concrete, thereby ensuring the quality and safety of the extension construction.

[0009] The invention solves the problem that vertical through cracks between new and old concrete are prone to occur in traditional cantilever beam extension due to poor stress at the chiseled parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0011] Figure 1 It is a schematic diagram of the main structure provided in one embodiment of the utility model;

[0012] Figure 2 It is a schematic diagram of the internal (cross-sectional) structure of a casting template provided in one embodiment of the utility model.

[0013] Description of reference numerals:

[0014] 1. Tongue and groove; 2. Extending steel bars; 3. Reinforcing stirrups; 4. Surface steel bars; 5. Casting formwork; 6. Supporting steel bars. DETAILED DESCRIPTION

[0015] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0016] The utility model provides a cantilever beam reinforcement extension structure through improvement. The technical solution of the utility model is:

[0017] like Figure 1 As shown, a reinforcement and extension structure of a cantilever beam includes a tongue and groove 1 opened on the original beam, a casting template 5 whose shape is adapted to the tongue and groove 1, so that the finally cast extended beam can better fit the original beam, a plurality of extension steel bars 2 are welded and fixed at the tongue and groove 1, the extension steel bars 2 are welded to the original steel bars of the original beam, reinforcing stirrups 3 are arranged on the surface of the extension steel bars 2, the reinforcing stirrups 3 can ensure the connection stability at the steel bar welding point, the outer end of the extension steel bar 2 is fixedly connected with a row of surface steel bars 4, the row of surface steel bars 4 determines its shape according to the cross-sectional area shape of the extension beam, and is welded and fixed to the extension steel bars 2, a casting template 5 is arranged at the tongue and groove 1, the extension steel bars 2, the reinforcing stirrups 3 and the row of surface steel bars 4 are all in the casting template 5.

[0018] like Figure 2 As shown, in one embodiment, one end of the extension steel bar 2 is fixed to the casting template 5, the inner wall of the casting template 5 is provided with a supporting steel bar 6, and the surface steel bars 4 surround the supporting steel bar 6 in a surrounding shape.

[0019] The specific working method is: when the reinforcement and extension structure of the cantilever beam is used, first open the tongue and groove 1 on the original beam, and reserve part of the steel bars of the original beam for welding the extension steel bars 2, then weld the reinforcing stirrups 3 on the extension steel bars 2, and then continue to weld the surface steel bars 4, and support the casting formwork 5, and finally pour the concrete.

[0020] The technical means disclosed in the utility model are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the utility model belong to the common knowledge of those skilled in the art.

Claims

1. A cantilever beam reinforcement extension structure, comprising a tongue and groove (1) provided on the original beam, characterized in that: A plurality of extended steel bars (2) are welded and fixed at the tongue-and-groove (1); reinforcing stirrups (3) are arranged on the surface of the extended steel bars (2); the outer ends of the extended steel bars (2) are fixedly connected to the surface steel bars (4); a casting template (5) is arranged at the tongue-and-groove (1); the extended steel bars (2), the reinforcing stirrups (3) and the surface steel bars (4) are all located inside the casting template (5).

2. The cantilever beam reinforcement and extension structure according to claim 1, characterized in that: One end of the extension steel bar (2) is fixed to the casting template (5), the inner wall of the casting template (5) is provided with a supporting steel bar (6), and the surface steel bars (4) surround the supporting steel bar (6) in an encircling shape.

Images