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Expansion type anchor rod device

An inflatable, bolting technology, used in excavation, construction, infrastructure engineering, etc., can solve problems such as difficulty in guaranteeing the effect of frictional resistance to pulling force, decreased bonding effect, and insufficient durability.

Inactive Publication Date: 2017-10-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing bolts usually have no expansion function, and only rely on the adhesive to fix the anchor in the rock. Since the adhesive is a chemical compound, the durability is insufficient, and the bonding effect will decrease after a long time
At present, most of the expansion bolts bloom at one end, and the expansion effect is difficult to guarantee.
After expansion, only rely on the expanded volume and structure for extrusion, and rely on friction to provide anchor pulling effect, and the resistance to pulling effect provided by friction is difficult to guarantee

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but is not limited to the content described below.

[0025] The expansion type bolt device provided by the present invention has a structure such as Figure 1 to Figure 3 As shown, it includes an expansion jacket 1 , a tension anchor 4 , and a nut 6 .

[0026] The expansion type jacket 1 is provided with openings 3 at its two ends, so that the tension anchor rod can pass through; on the outside of the jacket body, there is a sharp hook (barb) opposite to the direction of the front end, which is used for embedding When the bolt is stressed, the device will move to the outside, and the sharp hook will be embedded in the rock and soil, thus playing the role of the bolt device. The expansion jacket adopts a fence structure jacket. Compared with the traditional straight jacket, the fence structure not only ensures the longitudinal strength, but also reduces t...

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Abstract

The invention discloses an expandable anchor device, which is provided with an expandable outer casing (1), a nut (6) and a tensioned anchor rod (4), wherein: the two ends of the expandable outer casing (1) are provided with openings (3), after the tension anchor rod passes through, the expansion overcoat (1) and the tension anchor rod are fixed together by the nut (6). The invention has the advantages of simple construction, good embedding effect with rock mass, and remarkable engineering benefit.

Description

technical field [0001] The invention relates to a bolt device, in particular to an expandable bolt device. Background technique [0002] For rock areas with well-developed fractures, fastening with bolts is an effective way to increase the overall strength, peak strength and residual strength of the rock. The application of bolts can fasten the rock mass with developed cracks to a certain extent, especially in earthquake-prone areas, where rock support becomes the primary task for the safety protection of slopes on both sides of tunnels and trains. The protective effect of rocks in these areas will directly affect the driving safety of cars and trains. The use of bolts can improve the integrity and strength of the rock, increase the internal friction angle, and effectively prevent rockfall, landslides and other problems. [0003] The existing bolts usually have no expansion function, and only rely on the adhesive to fix the anchor in the rock. Since the adhesive is a chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20
CPCE02D17/20
Inventor 严岩齐凯凯杨泽亮申翃
Owner WUHAN UNIV OF TECH
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