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In-hole prestress supporting component, prestress anchor rod and construction method

A technology of supporting components and prestressing, which is applied in the direction of foundation structure engineering, sheet pile walls, protection devices, etc., can solve the problems of unimproved stress state of grouting body, cross-process operation, and hidden danger of water leakage, etc., and achieve reduction Construction cross operation, improved stress conditions, and good stress conditions

Pending Publication Date: 2021-04-13
深圳钜联锚杆技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the prestressed support members are all set on the surface of the ground, but there are three defects. One is that the holes on the basement floor need to be filled and blocked to stop water after the prestress is applied, and there is a hidden danger of water leakage; Stress construction needs to be carried out after the construction of the basement floor is completed, there are cross-process operations, and the construction period is long; third, the applied prestress is all transmitted to the surface of the ground, and no or very little is directly transmitted to the grouting body in the anchor hole. The stress state of the body cannot be improved

Method used

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  • In-hole prestress supporting component, prestress anchor rod and construction method
  • In-hole prestress supporting component, prestress anchor rod and construction method
  • In-hole prestress supporting component, prestress anchor rod and construction method

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Embodiment 1

[0056] see figure 1 , In this embodiment, the prestressed supporting member in the hole is the sleeve 1, and the material of the sleeve 1 is steel. Sleeve 1 is sleeved on the anchor rod body 21, and puts into the anchor hole 3 together with the anchor rod body 21, and the grouting body 6 in the anchor hole 3 is embedded with the sleeve 1. The upper end of sleeve 1 is positioned at anchor hole aperture 31 places, can be concordant with anchor hole aperture 31 places formation surfaces, also can be higher than anchor hole aperture 31 places formation surfaces. The upper end of the sleeve 1 supports the force applying member 4, and the lower end of the sleeve 1 stretches into the anchor hole to a certain depth. Preferably, the depth at which the lower end of the sleeve 1 extends into the anchor hole 3 is not less than three times the diameter of the anchor hole opening 31.

[0057] In this embodiment, a sleeve bottom plate 11 can also be added at the lower end of the sleeve 1, ...

Embodiment 2

[0061] In order to improve the stress condition of the upper end of the sleeve 1 and the force applying member 4, see image 3 , the present embodiment is provided with sleeve top plate 12 at the upper end of sleeve 1, and the center of sleeve top plate 12 is provided with a sleeve top plate center through hole 121, and anchor rod body 21 passes in sleeve top plate center through hole 121. The size of the sleeve top plate center through hole 121 is designed according to the anchor rod body 21 diameters. Sleeve 1 is by top plate 12 as bearing surface bearing force application member 4, and force application member 4 can be the prestressing nut also can be the base of core-through jack.

Embodiment 3

[0063] see Figure 4A and Figure 4B In the present embodiment, the prestressed supporting member in the hole is a piston type telescopic sleeve 1 made up of an outer cylinder 101 and an inner cylinder 102, and the lower end of the inner cylinder 102 stretches into the inner chamber of the outer cylinder 101 and can move up and down. The lower end of the outer cylinder 101 extends into the anchor hole 3 , and the upper end is located at the opening 31 of the anchor hole. The upper end of the inner cylinder 102 is higher than the upper end of the urceolus 101 by h (during prestress force application), and the upper end of the inner cylinder 102 supports the force application member 4.

[0064] When applying prestress, the force applying member 4 presses down the upper end of the inner cylinder 102, the inner cylinder 102 presses the outer cylinder 101 downward, and the outer cylinder 101 transmits the pressure to the grouting body 6 again.

[0065] see Figure 5 , the outer ...

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Abstract

The invention provides an in-hole prestress supporting component. The in-hole prestress supporting component is a sleeve and is used for being arranged on an anchor rod body in a sleeving manner and arranged in an anchor hole; the upper end of the sleeve is located at a hole opening of the anchor hole so as to support a prestress force application component. The invention further provides a prestress anchor rod. The anchor rod body is sleeved with the in-hole prestress supporting component. The upper end of the sleeve is used for supporting the prestress force application component to apply prestress, a ground supporting beam plate needed by a traditional prestress anchor rod is omitted, a hole does not need to be formed in a basement bottom plate, the hidden danger of basement bottom plate water leakage is avoided, the construction period is shortened, and construction cross operation is reduced; and prestress can be directly transmitted to a grouting body with a certain depth in the hole, pull stress possibly happening to the grouting body is avoided or reduced, and the stress state of the grouting body is improved. The invention further provides a construction method of the anchor rod.

Description

technical field [0001] The invention relates to the technical field of anchor rods, in particular to a prestressed support member in a hole, a prestressed anchor rod with a prestressed support member in a hole and a construction method. Background technique [0002] In order to apply prestress, prestressed bolts need to be provided with supporting beams or plates on the surface of the formation, and the ground is reinforced, and the prestressed force members are supported on the beams or plates to apply prestress to the bolts. In the basement anti-floating anchor rod, generally all are holes on the basement floor, and the basement floor is used as a supporting member to apply prestress. So far, the prestressed support members are all set on the surface of the ground, but there are three defects. One is that the holes on the basement floor need to be filled and blocked to stop water after the prestress is applied, and there is a hidden danger of water leakage; Stress constru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/74E02D31/12
CPCE02D5/74E02D31/12
Inventor 曾庆义蓝波
Owner 深圳钜联锚杆技术有限公司
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