Inverted U-shaped prestressed steel strand anti-slip device and method

A technology for prestressed steel strands and steel strands, which is used in construction, building construction, and construction material processing to achieve the effect of improving construction safety quality, highlighting substantive features, and making significant progress.

Pending Publication Date: 2019-03-26
CHINA NUCLEAR IND 24 CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an anti-slipping device for inverted U-shaped prestressed steel strands, to solve the problem of slippage risk of inverted U-shaped steel strands in the prior art during containment beam penetration construction, and to avoid inverted U-shaped steel strands The purpose of preventing line slippage and improving construction safety

Method used

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  • Inverted U-shaped prestressed steel strand anti-slip device and method
  • Inverted U-shaped prestressed steel strand anti-slip device and method
  • Inverted U-shaped prestressed steel strand anti-slip device and method

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Experimental program
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Effect test

Embodiment 1

[0038] Such as Figure 1 to Figure 7 The shown anti-slip device of an inverted U-shaped prestressed steel strand includes a steel strand anchor plate 7 and a base 3 on which a lifting mechanism 4 is arranged, and the lifting mechanism 4 is used to drive the supporting plate 5 to lift , the anchor plate cover 6 is placed on the supporting plate 5, the upper end of the anchor plate cover 6 is open, the steel strand anchor plate 7 is placed in the anchor plate cover 6, and the bottom surface of the anchor plate cover 6 is provided with some perforations, and some perforations are connected to the anchor plate cover 6. The through holes on the steel strand anchor plate 7 are facing each other one by one.

Embodiment 2

[0040] Such as Figure 1 to Figure 7 The shown anti-slip device of an inverted U-shaped prestressed steel strand, on the basis of Embodiment 1, also includes a clip that matches the anchor plate 7 of the steel strand, and the clip is set from the anchor plate The bottom of 6 is inserted in the perforation and clamps the steel strand; it also includes an anti-dropping device for preventing the clip from falling. The anti-falling device is a locking rod 11, which is detachably connected to the bottom of the anchor plate sleeve 6, and the locking rod 11 is used to hold the clip from below. The base 3 is fixed on the platform 2, and the bottom of the platform 2 is provided with a universal wheel 1 with a brake. The lifting mechanism 4 is a screw lift, and the screw lift is driven by a motor 9 through a transmission rod 8 . The supporting plate 5 is provided with a flange mounting hole 14 for connecting with the screw lifter, and a wire hole 16 facing the steel strand anchor plat...

Embodiment 3

[0042] This embodiment takes the containment construction of a certain nuclear power plant as an example. The inverted U-shaped prestressed steel strands of the nuclear power plant containment are each about 195m long, composed of 55 steel strands, and weigh about 13 tons. The height is 82m, and the bell mouths at both ends of the conduit are distributed on the roof of the corridor. When threading, 55 steel strands need to be bundled in the corridor, and then pulled into the tunnel as a whole, which makes the construction difficult and the safety risk is extremely high. Among them, the anti-slip method of the inverted U-shaped prestressed steel strand is:

[0043] (a) Place the steel strand anchor plate 7 in the anchor plate sleeve 6, make the fixing hole 15 face the fixing bolt 13, screw the fixing bolt 13 into the anchor plate sleeve 6 and enter the fixing hole 15 to lock the steel strand anchor plate 7;

[0044] (b) Place the anchor plate sleeve 6 on the supporting plate ...

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Abstract

The invention discloses an inverted U-shaped prestressed steel strand anti-slip device and method. The device comprises a steel strand anchor plate and further comprises a base. The base is provided with a lifting mechanism, and the lifting mechanism is used for driving a pallet to move up and down. An anchor plate sleeve is placed on the pallet, the upper end of the anchor plate sleeve is open, and the steel strand anchor plate is placed in the anchor plate sleeve. A plurality of holes are formed in the bottom surface of the anchor plate sleeve and right face through holes in the steel strandanchor plate in one-to-one correspondence mode. The inverted U-shaped prestressed steel strand anti-slip device solves the problem in the prior art of the risk of slipping of the inverted U-shaped steel strand during the bundling construction of a safety shell, and achieves the aim of avoiding slipping of an inverted U-shaped steel strand and improving construction safety.

Description

technical field [0001] The invention relates to the field of prestressed construction, in particular to an anti-slip device and method for an inverted U-shaped prestressed steel strand. Background technique [0002] Prestressed steel strand is a stranded steel cable consisting of 2, 3, 7 or 19 high-strength steel wires, and has been treated with stress relief (stabilization treatment), suitable for prestressed concrete or similar applications. The main characteristics of prestressed steel strands are high strength and good relaxation performance, and they are relatively straight when unfolded. The common tensile strength grade is 1860 MPa, and there are also strength grades such as 1720, 1770, 1960, 2000, and 2100 MPa. The yield strength of this steel is also high. [0003] The containment is a key facility to ensure the safety of nuclear power plants, and it is of great significance to study the arrangement of prestressed tendons for the containment. From a design point ...

Claims

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Application Information

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IPC IPC(8): E04G21/12
CPCE04G21/12
Inventor 葛凯李珊张仕兵孙云华王顺泽邵克军杨艺精张西阳袁鹏飞王杰郭慧娟郑鹏陈建超李佳
Owner CHINA NUCLEAR IND 24 CONSTR
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