Bracket for quickly mounting prestress tensioning jack of inner top plate of continuous beam

Abstract

The utility model discloses a bracket for fast installation of a continuous beam inner top plate prestress tensioning jack, which comprises a main body support, a traction support and a slideway support, the main body support comprises a high-slope frame body and a low-slope frame body, the high-slope frame body and the low-slope frame body are respectively formed by fixedly connecting a horizontal cross rod and a vertical upright rod, cross rods are fixedly connected between the top ends of the vertical rods of the main body bracket; chain blocks are hung on the cross rods at the tops of the high-slope frame body and the low-slope frame body; the traction bracket is arranged on a high slope and is formed by fixedly connecting a cross rod and a vertical rod, and the top of the vertical rod of the traction bracket is fixedly connected with the cross rod at the top of the high slope frame body; the slide way support is arranged on a low slope, the traction support is formed by fixedly connecting a transverse rod and a vertical rod, and a slide way is fixedly arranged between the transverse rod of the traction support and the transverse rod on the top of the high slope frame body. The utility model aims to provide the bracket which is simple in structure, convenient to assemble and disassemble, labor-saving and capable of quickly dragging the tensioning jack to the tensioning end.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a bracket for quickly installing a prestressed tensioning jack in a top plate of a continuous beam. Background Art

[0002] At present, prestressing is an important construction technology and is widely used in bridge concrete structures. Prestressing is generated by applying continuous tension to steel strands. Prestressing is carried out after concrete pouring and solidification, with the purpose of improving the strength and bearing capacity of concrete structures by applying prestressing. In the prestressing process, the steel strands are first arranged in the concrete structure, and then one end is fixed, and the tensioning jack equipment is installed on the other end, or both ends are tensioned and installed at the same time. The tensioning equipment will apply continuous force to stretch the steel strand until the prestressing level required by the design is reached. Since the common continuous beam tensioning jack equipment is generally 400kg-450kg, there is a certain height of the top plate inside the bridge, and the installation of the jack tensioning equipment is difficult due to the limitation of the space inside the bridge box. The traditional method of setting up a bracket at the installation position of the jack at the tensioning end, and lifting the hand winch to install it in the air has a low safety factor, large deviation, and is laborious and time-consuming. Therefore, there is an urgent need for a bracket with simple structure, convenient installation and disassembly, saving manpower, and being able to quickly pull the tensioning jack to the tensioning end. Utility Model Content

[0003] The utility model aims to overcome the deficiencies in the prior art and to provide a bracket which has a simple structure, is easy to install and disassemble, saves manpower, and can quickly pull the tensioning jack to the tensioning end.

[0004] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0005] A bracket for quickly installing prestressed tensioning jacks in the top plate of a continuous beam comprises a main bracket, a traction bracket and a slide bracket, the main bracket comprises a high-slope frame and a low-slope frame, both of which are composed of horizontal cross bars and vertical uprights fixedly connected, cross bars are fixedly connected between the tops of the uprights of the main bracket, and hand winches are hung on the cross bars at the tops of the high-slope frame and the low-slope frame; the traction bracket is set on a high slope, the traction bracket is composed of cross bars and uprights fixedly connected, and the tops of the uprights of the traction bracket are fixedly connected to the cross bars at the top of the high-slope frame; the slide bracket is set on a low slope, the traction bracket is composed of cross bars and uprights fixedly connected, and a slide for traction tensioning jacks is fixedly arranged between the cross bars of the traction bracket and the cross bars at the top of the high-slope frame.

[0006] Furthermore, cross bars are fixedly arranged between the middle parts of the vertical poles on the sides of the high-slope frame and the low-slope frame, and support poles supported on the bottom side of the slide are fixedly connected between the cross bars.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] The utility model is easy to install and disassemble, and has good structural stability. By setting a bracket on the ramp in the continuous beam to arrange the inclined slideway, the tensioning jack is accurately positioned in advance. During the traction process, the traction bracket provides support for the hand chain hoist. Through the hand chain hoist and the traction bracket, the tensioning jack will not deviate during the traction process and is more firmly fixed. The hand chain hoist is used for positioning throughout the process, which is simple to operate and saves a lot of labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the structure of the main support in the utility model;

[0011] Figure 3 This is a schematic diagram of the structure of the slideway bracket in the utility model;

[0012] Figure 4 It is a structural schematic diagram of the traction bracket in the utility model.

[0013] Reference numerals:

[0014] 1- horizontal bar, 2- vertical bar, 3- hand chain hoist, 4- tensioning jack, 5- traction bracket, 6- slideway, 7- slideway bracket, 8- support rod. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0016] like Figures 1 to 4 As shown, a bracket for quickly installing prestressed tensioning jacks in the top plate of a continuous beam includes a main bracket, a traction bracket 5 and a slide bracket 7, wherein the main bracket includes a high-slope frame and a low-slope frame, both of which are composed of a horizontal crossbar 1 and a vertical upright 2 fixedly connected, a crossbar 1 is fixedly connected between the tops of each upright 2 of the main bracket, and a hand winch 3 is hung on the crossbar 1 at the top of the high-slope frame and the low-slope frame; the traction bracket 5 is set on a high slope, the traction bracket 5 is composed of a crossbar 1 and an upright 2 fixedly connected, and the tops of the uprights 2 of the traction bracket 5 are fixedly connected to the crossbar 1 at the top of the high-slope frame 5; the slide bracket 7 is set on a low slope, the traction bracket 5 is composed of a crossbar 1 and an upright 2 fixedly connected, and a slideway 6 for traction tensioning jacks 4 is fixedly arranged between the crossbar 1 of the traction bracket 5 and the crossbar 1 at the top of the high-slope frame.

[0017] Among them, a cross bar 1 is fixedly arranged between the middle parts of the vertical poles 2 on the sides of the high-slope frame and the low-slope frame, and a support rod 8 supported on the bottom side of the slide 6 is fixedly connected between the cross bars 1. The middle parts of the vertical poles 2 of the high-slope frame and the low-slope frame correspond to the inclined middle part of the slide 6. The support rod 8 is arranged at this position to support the middle part of the slide 6, thereby improving the stability and safety of the slide 6.

[0018] The construction steps of the utility model are as follows: 50cm above the top surface of the inner box bottom plate of the continuous beam, away from the tensioning end of the top plate, so that the slope ratio from this point to the tensioning end is less than 1:3, a low-slope frame is set up at this point, and a high-slope frame is set on one side of the tensioning end, the center of the low-slope end is aligned with the center of the high-slope end, the center of the low-slope end is the lifting point of the tensioning jack 4 through the hand chain hoist 3, and the center of the high-slope end is the traction point of the tensioning jack 4. The tensioning jack 4 is lifted to a certain height by the hand chain hoist 3 at the top of the low-slope frame, and the tensioning jack 4 is placed on the low-end side of the slideway 6, and then the hand chain hoist 3 at the top of the high-slope frame is hung with the tensioning jack 4, the hand chain hoist 3 at the low-slope end is disconnected from the tensioning jack 4, and the tensioning jack 4 is pulled to the tensioning end by the hand chain hoist 3 at the high-slope end and fixed in place, and subsequent tensioning work can be carried out.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bracket for quick installation of prestressed tensioning jacks in the top plate of a continuous beam, characterized in that: The invention comprises a main frame, a traction frame (5) and a slideway frame (7), wherein the main frame comprises a high-slope frame and a low-slope frame, wherein the high-slope frame and the low-slope frame are both composed of a horizontal crossbar (1) and a vertical upright pole (2) fixedly connected, a crossbar (1) is fixedly connected between the tops of the upright poles (2) of the main frame, and a hand chain hoist (3) is hung on the crossbars (1) at the tops of the high-slope frame and the low-slope frame; the traction frame (5) is arranged on a high slope, the traction frame (5) is composed of a crossbar (1) and an upright pole (2) fixedly connected, and the tops of the upright poles (2) of the traction frame (5) are fixedly connected to the crossbar (1) at the top of the high-slope frame; the slideway frame (7) is arranged on a low slope, the traction frame (5) is composed of a crossbar (1) and an upright pole (2) fixedly connected, and a slideway (6) for traction tensioning jacks (4) is fixedly arranged between the crossbar (1) of the traction frame (5) and the crossbar (1) at the top of the high-slope frame.

2. A bracket for quick installation of prestressed tensioning jacks in the top plate of a continuous beam according to claim 1, characterized in that: A crossbar (1) is fixedly arranged between the middle parts of the vertical poles (2) on the sides of the high-slope frame and the low-slope frame, and a support pole (8) supported on the bottom side of the slideway (6) is fixedly connected between the crossbars (1).

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