Hogging moment tensioning hanging cage at wet joint

Abstract

The utility model belongs to the technical field of bridge deck system tensioning construction, and discloses a hogging moment tensioning hanging cage at a wet joint, which comprises a construction platform, two ends of the construction platform are fixedly connected with telescopic abutting rods which are symmetrically arranged, and one end, far away from the construction platform, of each telescopic abutting rod abuts against the inner wall of a T beam. The four corners of the top of the construction platform are connected with two corresponding supporting pipes through steel wire ropes, the supporting pipes are arranged on the tops of the T beams, two sets of symmetrically-arranged fences are installed on the top of the construction platform, the telescopic abutting rod comprises a lead screw, the lead screw is fixedly connected with the construction platform, and the lead screw is in threaded connection with a threaded pipe. The telescopic abutting rods at the two ends of the construction platform extend to abut against the inner wall of the T beam, so that the whole construction platform is stable, supporting is formed through friction between the telescopic abutting rods and the inner wall of the T beam, pressure of a steel wire rope is reduced, and construction safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge deck tensioning construction, in particular to a negative bending moment tensioning hanging cage at a wet joint. Background Art

[0002] Wet joints refer to the joints where prestressed concrete beams are prefabricated in blocks and cantilevered to form large-span continuous beams, with cast-in-place concrete used to connect the beams into a whole. It is an important link in bridge construction, used to connect bridge structures and ensure their mechanical properties and structural stability.

[0003] Construction at wet joints mostly requires the primitive operation method of manual suspension, where the tensioning platform is suspended by steel wire ropes on the embedded steel bars in the wet joints of the bridge deck. Due to the limited space at the wet joints, the installation of the tensioning platform is difficult, and the tensioning platform is suspended in mid-air and the bottom of the platform cannot be rooted and fixed, which increases the difficulty of construction. In addition, repeated use causes friction damage to the connecting components, and there are safety hazards in its use.

[0004] Therefore, in order to solve the above problems, a negative bending moment tensioning cage at wet joints is proposed. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a negative bending moment tensioning cage at a wet joint, which has the advantages of relatively high construction safety and can be operated and turned over by one person.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a negative bending moment tensioning cage at a wet joint, comprising a construction platform, both ends of the construction platform are fixedly connected with symmetrically arranged telescopic clamping rods, the end of the telescopic clamping rod away from the construction platform is pressed against the inner wall of the T-beam, the top four corners of the construction platform are connected to two corresponding support tubes by steel wire ropes, the support tubes are arranged on the top of the T-beam, and two groups of symmetrically arranged fences are installed on the top of the construction platform.

[0007] Preferably, the telescopic clamping rod comprises a screw rod, the screw rod is fixedly connected to the construction platform, the screw rod is threadedly connected to a threaded pipe, and one end of the threaded pipe away from the screw rod is connected to a supporting foot via a bearing.

[0008] Preferably, the outer surface of the threaded tube is provided with anti-skid grooves, and the supporting feet are provided with anti-skid pads.

[0009] Preferably, a first-level hanging ring is fixed at the four corners of the top of the construction platform, and the first-level hanging ring is movably connected to a first-level safety buckle, and the first-level safety buckle is connected to a steel wire rope.

[0010] Preferably, one end of the steel wire rope away from the primary safety buckle is fixedly connected to a secondary safety buckle, the secondary safety buckle is movably connected to a secondary hanging ring, the top of the secondary hanging ring is fixedly connected to a sliding sleeve, the sliding sleeve is mounted on a support tube, a fixing bolt is provided on the sliding sleeve, and the fixing bolt is movably connected to the support tube.

[0011] Preferably, the fence includes a plurality of equally spaced limit plates, a damping shaft is installed in the limit plates, the damping shaft is connected to a telescopic vertical rod, the telescopic vertical rod is fixedly connected to a cross rod, a primary bolt is provided on the limit plates, and the primary bolt is movably connected to the telescopic vertical rod.

[0012] Preferably, the telescopic vertical rod includes an outer rod, the top of the outer rod is fixedly connected to the cross rod, an inner rod is provided inside the outer rod, the bottom end of the inner rod is connected to the damping shaft, and a secondary bolt is provided on one side of the outer rod near the bottom, and the secondary bolt is movably connected to the inner rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model provides a telescopic abutting rod, which can extend the telescopic abutting rods at both ends of the construction platform to abut against the inner wall of the T-beam, making the construction platform more stable as a whole, and relying on the friction between the telescopic abutting rod and the inner wall of the T-beam to form a support, reducing the pressure on the wire rope and improving the safety of construction;

[0015] 2. The utility model sets a fence whose structure allows the fence to be retractable and rotatable. When installing the construction platform, the fence can be made to fit the construction platform to avoid affecting the operation. During construction, the fence can be rotated and raised to protect the construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a structural schematic diagram of the construction platform of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the telescopic vertical rod of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the telescopic tightening rod of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the position of the sliding sleeve of the utility model.

[0021] In the figure: 1. Construction platform;

[0022] 2. Telescopic tightening rod; 21. Screw rod; 22. Threaded tube; 23. Support foot; 24. Anti-skid pad;

[0023] 3. Steel wire rope; 4. Support pipe;

[0024] 5. Fence; 51. Limiting plate; 52. Damping shaft; 53. Telescopic vertical rod; 531. Outer rod; 532. Inner rod; 533. Secondary bolt; 54. Crossbar; 55. Primary bolt;

[0025] 6. First-level hanging ring; 7. First-level safety buckle; 8. Second-level safety buckle; 9. Second-level hanging ring; 10. Sliding sleeve; 11. Fixing bolt. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] Example. Figures 1 to 5 As shown, the utility model provides a negative bending moment tensioning cage at a wet joint, comprising a construction platform 1, both ends of the construction platform 1 are fixedly connected with symmetrically arranged telescopic clamping rods 2, the end of the telescopic clamping rod 2 away from the construction platform 1 is pressed against the inner wall of the T-beam, and the telescopic clamping rod 2 is pressed against the T-beam to stabilize the construction platform 1, and can be suitable for wet joints of different widths. The top four corners of the construction platform 1 are connected to two corresponding support pipes 4 through steel wire ropes 3, and the steel wire ropes 3 are used to support the construction platform 1. The support pipes 4 are arranged on the top of the T-beam, and two groups of symmetrically arranged fences 5 are installed on the top of the construction platform 1. The fences 5 can improve the safety of construction.

[0028] Specifically, the telescopic clamping rod 2 includes a screw rod 21, which is fixedly connected to the construction platform 1. The screw rod 21 is threadedly connected to a threaded tube 22. The end of the threaded tube 22 away from the screw rod 21 is connected to a supporting foot 23 through a bearing. By rotating the threaded tube 22, the supporting foot 23 can be pressed against the T-beam, thereby stabilizing the construction platform 1.

[0029] Furthermore, the outer surface of the threaded tube 22 is provided with anti-skid patterns, which facilitate the rotation of the threaded tube 22 . The support feet 23 are provided with anti-skid pads 24 , which can increase the friction with the inner wall of the T-beam.

[0030] Furthermore, a first-level hanging ring 6 is fixed at the four corners of the top of the construction platform 1, and the first-level hanging ring 6 is movably connected with a first-level safety buckle 7, which is connected to the steel wire rope 3. The first-level safety buckle 7 and the first-level hanging ring 6 facilitate the connection of the steel wire rope 3 to the construction platform 1.

[0031] It is worth mentioning that the end of the wire rope 3 away from the primary safety buckle 7 is fixedly connected to the secondary safety buckle 8, the secondary safety buckle 8 is movably connected to the secondary hanging ring 9, the top of the secondary hanging ring 9 is fixedly connected to the sliding sleeve 10, the sliding sleeve 10 is sleeved on the support tube 4, the sliding sleeve 10 is provided with a fixing bolt 11, the fixing bolt 11 is movably connected to the support tube 4, the secondary safety buckle 8 and the secondary hanging ring 9 facilitate the connection of the wire rope 3 to the sliding sleeve 10, and the sliding sleeve 10 is set on the support tube 4 to adjust the position according to needs, and the position is fixed by the fixing bolt 11.

[0032] It is worth noting that the fence 5 includes a plurality of equally spaced limit plates 51, which can limit the rotation angle of the telescopic vertical rod 52 to 90 degrees. A damping shaft 52 is installed in the limit plate 51, and the damping shaft 52 is connected to the telescopic vertical rod 53. The telescopic vertical rod 53 is fixedly connected to the cross bar 54. A first-level bolt 55 is provided on the limit plate 51, and the first-level bolt 55 is movably connected to the telescopic vertical rod 53. The first-level bolt 55 can fix the fence 5 to be vertical to the construction platform 1.

[0033] It is worth mentioning that the telescopic vertical rod 53 includes an outer rod 531, the top of the outer rod 531 is fixedly connected to the cross rod 54, an inner rod 532 is arranged inside the outer rod 531, the bottom end of the inner rod 532 is connected to the damping shaft 52, and a secondary bolt 533 is arranged on one side of the outer rod 531 near the bottom, and the secondary bolt 533 is movably connected to the inner rod 532. The length of the telescopic vertical rod 53 is adjusted by the secondary bolt 533, so that the fence 5 can be shortened and fit on the construction platform 1, so as to facilitate the installation of the construction platform 1.

[0034] Working principle and process: The construction workers place the long side of the construction platform 1 parallel to the T-beam, and then lower the construction platform 1 into the wet joint through the wire rope 3. After reaching the appropriate height, the wire rope 3 is used to adjust the construction platform 1 to rotate 90 degrees, so that the telescopic clamping rod 2 is vertical to the inner wall of the T-beam, and the support pipe 4 is placed on the top of the T-beam to support the construction platform 1. The construction workers lower the ladder onto the construction platform 1 and reach the construction platform 1. The threaded pipe 22 of the telescopic clamping rod 2 is rotated, and the threaded pipe 22 moves along the axis direction of the screw rod 21 until the support foot 23 is against the inner wall of the T-beam, making the construction platform 1 more stable as a whole, and the support foot 2 The anti-skid pad 24 on 3 can increase the friction with the inner wall of the T-beam, assist the steel wire rope 3 in supporting the force, rotate the cross bar 54 of the fence 5, make the telescopic vertical rod 53 in a vertical state, rotate the first-level bolt 55 to connect it to the telescopic vertical rod 53 to fix the telescopic vertical rod 53 in a vertical state, rotate the second-level bolt 533 of the telescopic vertical rod 53 to make it leave the inner rod 532, and then pull the cross bar 54 upward to increase the part of the inner rod 532 leaking out of the outer rod 531, and finally, rotate the second-level bolt 533 again to fix the height of the telescopic vertical rod 53, so as to fix the state of the fence 5, so as to facilitate the construction of the construction personnel and improve the safety during construction.

[0035] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A negative moment tensioning cage at a wet joint, comprising a construction platform (1), characterized in that: The two ends of the construction platform (1) are fixedly connected with symmetrically arranged telescopic abutting rods (2), one end of the telescopic abutting rod (2) away from the construction platform (1) abuts against the inner wall of the T-beam, the four corners of the top of the construction platform (1) are connected to two corresponding support pipes (4) via steel wire ropes (3), the support pipes (4) are arranged on the top of the T-beam, and two sets of symmetrically arranged fences (5) are installed on the top of the construction platform (1).

2. A negative moment tensioning cage for wet joints according to claim 1, characterized in that: The telescopic abutting rod (2) comprises a screw rod (21), the screw rod (21) is fixedly connected to the construction platform (1), the screw rod (21) is threadedly connected to a threaded tube (22), and one end of the threaded tube (22) away from the screw rod (21) is connected to a support foot (23) via a bearing.

3. A negative moment tensioning cage for wet joints according to claim 2, characterized in that: The outer surface of the threaded tube (22) is provided with anti-skid grooves, and the supporting foot (23) is provided with an anti-skid pad (24).

4. A negative moment tensioning cage for wet joints according to claim 1, characterized in that: The four corners of the top of the construction platform (1) are fixed with first-level hanging rings (6), the first-level hanging rings (6) are movably connected with first-level safety buckles (7), and the first-level safety buckles (7) are connected to the steel wire ropes (3).

5. A negative moment tensioning cage for wet joints according to claim 4, characterized in that: One end of the steel wire rope (3) away from the primary safety buckle (7) is fixedly connected to a secondary safety buckle (8), the secondary safety buckle (8) is movably connected to a secondary hanging ring (9), the top of the secondary hanging ring (9) is fixedly connected to a sliding sleeve (10), the sliding sleeve (10) is sleeved on the support tube (4), the sliding sleeve (10) is provided with a fixing bolt (11), and the fixing bolt (11) is movably connected to the support tube (4).

6. A negative moment tensioning cage for wet joints according to claim 1, characterized in that: The fence (5) comprises a plurality of equidistantly arranged limit plates (51), wherein a damping shaft (52) is installed in the limit plates (51), wherein the damping shaft (52) is connected to a telescopic vertical rod (53), wherein the telescopic vertical rod (53) is fixedly connected to a cross rod (54), and wherein a primary bolt (55) is provided on the limit plates (51), wherein the primary bolt (55) is movably connected to the telescopic vertical rod (53).

7. A negative moment tensioning cage for wet joints according to claim 6, characterized in that: The telescopic vertical rod (53) comprises an outer rod (531), the top of the outer rod (531) is fixedly connected to the cross rod (54), an inner rod (532) is arranged inside the outer rod (531), the bottom end of the inner rod (532) is connected to the damping shaft (52), and a secondary bolt (533) is arranged on one side of the outer rod (531) near the bottom, and the secondary bolt (533) is movably connected to the inner rod (532).

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