Beam top flat tensioning end node structure

Abstract

The utility model discloses a beam top flat tensioning end node structure which comprises a prestressed beam, a first corrugated pipe, a second corrugated pipe, a tensioning groove and a jack, wherein the first corrugated pipe and the second corrugated pipe are arranged at the top of the beam; the tensioning groove is formed in one side of the first corrugated pipe; the first corrugated pipe is arranged above the second corrugated pipe, and the length of the first corrugated pipe is larger than that of the second corrugated pipe. The first corrugated pipe is arranged at the middle upper part of the middle beam body height of the prestressed beam; the tensioning groove is formed in the one-third section of the beam span of the prestressed beam and located on the top face of the beam body. According to the utility model, through the lengthening arrangement of the first corrugated pipe, a space is reserved for the arrangement of the top tensioning groove; the tensioning groove is flush with the top of the beam body, so that the jack can be conveniently mounted; by arranging the beam stirrups and the beam waist bars at the tensioning grooves, the first corrugated pipe can be conveniently installed, and an installation space is provided for installation of the jack; and through arrangement of the beam longitudinal bars, the strength of the top of the beam body can be guaranteed, and arrangement of the tensioning grooves and follow-up jack installation are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed beam construction, in particular to a beam top flat tension end node structure. Background Art

[0002] Prestressed beam construction is divided into pre-tensioning construction and post-tensioning construction. In post-tensioning construction, one end needs to be anchored and the other end needs to be tensioned. The tensioning end needs to be set with tensioning grooves. Generally, the tensioning of the beam body is set on the side of the beam body or in a separate groove. How to set the tensioning groove on the top of the beam and ensure the layout of the jack and the installation of the corrugated pipe requires targeted design. Utility Model Content

[0003] The utility model provides a beam top flat tensioning end node structure, which is used to solve the technical problems of setting prestressed tensioning grooves on the top of the beam body, arranging jacks and setting beam body reinforcements.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A beam top flat tension end node structure, comprising a prestressed beam, a first corrugated pipe and a second corrugated pipe arranged on the beam top, a tensioning groove arranged on one side of the first corrugated pipe, and a jack arranged in the tensioning groove;

[0006] The first corrugated pipe is arranged above the second corrugated pipe, and the length of the first corrugated pipe is greater than that of the second corrugated pipe; the first corrugated pipe is arranged at the middle and upper part of the height of the beam body in the prestressed beam;

[0007] The tensioning groove is a rectangular groove, which is arranged in the middle one-third section of the span of the prestressed beam and is located on the top surface of the beam body.

[0008] Furthermore, the prestressed beam includes beam concrete, beam stirrups arranged inside the beam concrete, beam waist reinforcement arranged in the height direction of the beam stirrups, and beam longitudinal reinforcement arranged on the top of the beam concrete.

[0009] Furthermore, the beam stirrups are arranged in a mesh shape, and the beam stirrups are disconnected at the first corrugated tube and bent flat at the bottom.

[0010] Furthermore, the beam waist reinforcement is arranged within the height range of the jack, and the beam waist reinforcement is disconnected at the first corrugated pipe and reinforced by welding short steel bars.

[0011] Furthermore, the longitudinal reinforcements of the beam are arranged at intervals and in a single row in the width direction of the beam, and the longitudinal reinforcements of the beam are arranged throughout the top of the beam and a tensioning groove space is reserved at the height.

[0012] Furthermore, a casting block is provided at the end of the length direction of the second corrugated pipe and in the height direction of the first corrugated pipe, and the casting block is made of cast-in-place concrete.

[0013] Furthermore, the diameter of the jack is larger than that of the first bellows, and the jack is arranged concentrically and aligned with the first bellows; the length of the jack is smaller than the length of the tensioning groove.

[0014] The beneficial effects of the utility model are embodied in:

[0015] 1) The utility model is advantageous in reserving space for setting the top tensioning groove by lengthening the first corrugated pipe; and the tensioning groove is arranged flush with the top of the beam body, which is advantageous in installing the jack;

[0016] 2) The utility model not only facilitates the installation of the first corrugated pipe but also provides installation space for the installation of the jack by setting the beam stirrups and beam waist reinforcement at the tensioning groove;

[0017] 3) The utility model helps to ensure the strength of the top of the beam body and facilitates the setting of the tensioning groove and the subsequent installation of the jack through the arrangement of the longitudinal reinforcement of the beam.

[0018] Other features and advantages of the utility model will be described in the subsequent description, and in part will become apparent from the description, or be understood by implementing the utility model; the main purpose and other advantages of the utility model can be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the node structure of the flat tension end of the beam top;

[0020] Figure 2 It is a schematic diagram of the cross section at the tensioning groove.

[0021] Figure numerals: 1-prestressed beam, 11-beam concrete, 12-beam stirrups, 13-beam waist reinforcement, 14-beam longitudinal reinforcement, 2-first corrugated pipe, 3-second corrugated pipe, 4-casting block, 5-tensioning groove, 6-floor slab, 7-jack. DETAILED DESCRIPTION

[0022] Take a certain Internet Industrial Park project as an example. It involves a post-tensioned prestressed beam. In order to ensure the effective tensioning of the post-tensioned tensioning bars set at the top of the beam, a flat tensioning end node structure is used for construction. Figure 1 and Figure 2 As shown, the beam top flat tensioning end node structure comprises a prestressed beam 1, a first corrugated pipe 2 and a second corrugated pipe 3 arranged at the top of the beam, a tensioning groove 5 arranged at one side of the first corrugated pipe 2, and a jack 7 arranged in the tensioning groove 5. Among them, the top of the prestressed beam 1 corresponds to the connection floor 6.

[0023] In this embodiment, the first corrugated pipe 2 is arranged above the second corrugated pipe 3, and the length of the first corrugated pipe 2 is greater than that of the second corrugated pipe 3; the first corrugated pipe 2 is arranged in the middle and upper part of the height of the beam body of the prestressed beam 1; the tensioning groove 5 is a rectangular groove, and the tensioning groove 5 is arranged in the middle one-third section of the span of the prestressed beam 1 and is located on the top surface of the beam body.

[0024] The prestressed beam 1 includes a beam concrete 11 , beam stirrups 12 arranged inside the beam concrete 11 , beam waist reinforcement 13 arranged in the height direction of the beam stirrups 12 , and beam longitudinal reinforcement 14 arranged on the top of the beam concrete 11 .

[0025] In this embodiment, the beam stirrups 12 are arranged in a mesh shape, and the beam stirrups 12 are disconnected at the first corrugated tube 2 and bent flat at the bottom.

[0026] The beam waist reinforcement 13 is arranged within the height range of the jack 7. The beam waist reinforcement 13 is disconnected at the first corrugated tube 2 and is reinforced by welding short steel bars.

[0027] In this embodiment, the longitudinal reinforcement 14 is arranged at intervals in the beam width direction and arranged in a single row, and the longitudinal reinforcement 14 is arranged throughout the top of the beam and a space for the tensioning groove 5 is reserved in height. A casting block 4 is also arranged at the end of the length of the second corrugated pipe 3 and in the height direction of the first corrugated pipe 2, and the casting block 4 is cast in place with concrete.

[0028] In this embodiment, the diameter of the jack 7 is larger than that of the first corrugated tube 2 , and the jack 7 is arranged concentrically and aligned with the first corrugated tube 2 ; the length of the jack 7 is smaller than that of the tensioning groove 5 .

[0029] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field thinks of within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A beam top flat tension end node structure, characterized in that: It comprises a prestressed beam (1), a first corrugated pipe (2) and a second corrugated pipe (3) arranged at the top of the beam, a tensioning groove (5) arranged at one side of the first corrugated pipe (2), and a jack (7) arranged in the tensioning groove (5); The first corrugated pipe (2) is arranged above the second corrugated pipe (3), and the length of the first corrugated pipe (2) is greater than that of the second corrugated pipe (3); the first corrugated pipe (2) is arranged at the middle and upper part of the height of the middle beam body of the prestressed beam (1); The tensioning groove (5) is a rectangular groove, and is arranged in a one-third section of the middle span of the prestressed beam (1) and is located on the top surface of the beam body.

2. A beam top flat tension end node structure as claimed in claim 1, characterized in that: The prestressed beam (1) comprises beam concrete (11), beam stirrups (12) arranged inside the beam concrete (11), beam waist reinforcements (13) arranged in the height direction of the beam stirrups (12), and beam longitudinal reinforcements (14) arranged on the top of the beam concrete (11).

3. A beam top flat tension end node structure as claimed in claim 2, characterized in that: The beam stirrups (12) are arranged in a mesh shape, and the beam stirrups (12) are disconnected at the first corrugated tube (2) and arranged with the bottom bent flat.

4. A beam top flat tension end node structure as claimed in claim 2, characterized in that: The beam waist reinforcement (13) is arranged within the height range of the jack (7), and the beam waist reinforcement (13) is disconnected at the first corrugated tube (2) and reinforced by welding short steel bars.

5. The beam top flat tension end node structure according to claim 2, characterized in that: The beam longitudinal reinforcements (14) are arranged at intervals in the beam width direction and arranged in a single row. The beam longitudinal reinforcements (14) are arranged throughout the length of the beam top and a space for a tensioning groove (5) is reserved at the height.

6. The beam top flat tension end node structure according to claim 1, characterized in that: A casting block (4) is also provided at the end of the length direction of the second corrugated pipe (3) and in the height direction of the first corrugated pipe (2), and the casting block (4) is made of cast-in-place concrete.

7. The beam top flat tension end node structure according to claim 1, characterized in that: The diameter of the jack (7) is larger than that of the first corrugated pipe (2), and the jack (7) and the first corrugated pipe (2) are arranged concentrically and aligned; the length of the jack (7) is smaller than the length of the tensioning groove (5).

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