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Prestress anchor device

A prestressing and anchoring technology, which is applied in the installation of anchors, construction, mining equipment, etc., can solve the problems of complex construction and complex construction technology, and achieve a cost-effective effect

Active Publication Date: 2006-12-27
项小珍 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The post-construction process is more complicated
[0009] In summary, in the prestressed bolt support, the fully bonded free section without casing (the third category above) requires secondary grouting, and the construction is complicated; the expansion shell in the mechanical point anchor type prestressed bolt Anchor rods (the first category above) can be organically combined through the anchor rod body and the expansion shell anchor head. Although it is a one-time grouting, it can be easily extended, but it is only suitable for rock conditions.

Method used

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Examples

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Embodiment Construction

[0066] Such as Figure 1~6 As shown, a prestressed bolt device is composed of a bolt body 1, a support plate 7, a lock nut 8, a centering device 5, a free section casing device 12, a grouting and an exhaust channel, and the like. The outer anchor section 302, the anchor section 301 and the free section 300 of the prestressed anchor rod are formed after grouting consolidation and prestressing. The free section casing 2 is threaded on the anchor body 1, and its two end fastener devices 2a are threaded to fix it on the anchor body 1 near the end of the support pad 7; the free section casing 2 can be The two end fastening devices 22 rotate and move on the anchor body 1, and the middle part is separated from the anchor body 1 to form an isolation cavity; there is an oil injection hole 21 on it, which can realize oil injection isolation or non-oil injection isolation.

[0067] Such as figure 2 As shown, the terminal fastener device 22 is composed of a sleeve joint 3 and a rod bod...

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Abstract

The invention relates to a coarse steel bar prestress anchor rod, which comprises: an anchor rod body, a support pad plate, a locking nut, a centering device, free section sleeve, and pouring discharge channel, wherein the anchor rod body is divided into outer anchor section, anchor fixing section and free section; the outer anchor section is formed by support pad plate, locking nut and one section f external anchor rod; the anchor rod of free section is sheathed with free section sleeve whose two end buckles fix the screw on the anchor rod body near one end of support pad plate, to rotate and move along tow end buckles on the anchor rod; its middle part is separated from anchor rod body to form separate chamber. The invention can be used in underground construction and rock anchor fixing, with simple process and low cost.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering anchoring support. A prestressed bolt device provided by the invention is an improvement to the supporting bolt device and the installation process. It is suitable for rock and soil anchoring support in underground engineering, foundation pit, and slope engineering. Background technique [0002] In the process of underground engineering, mining engineering, foundation pit and slope engineering involved in geotechnical engineering, in order to prevent the formation from deforming, collapsing or destabilizing and endangering safety, a main support technology for strengthening the formation is to use bolts. The formation is reinforced through the high-strength tensile capacity of the bolt installed in the formation and the dense combination between the bolt and the grouting body around the bolt and the formation to improve the integrity of the formation. In order to control the for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/74E21D21/00
Inventor 吴德兴
Owner 项小珍
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