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Pressing seam type friction type constant-resistance anchor rod

A seam-pressing and bolting technology, which is applied in the installation of bolts, mining equipment, earthwork drilling, etc., can solve the problems of small ultimate tensile length of bolts, easy function overload failure, and lack of flexible support capabilities, etc., to achieve The effect of keeping the surrounding rock stable, simple structure and stable working performance

Active Publication Date: 2015-03-25
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the present invention provides a seam-type frictional constant-resistance anchor, which solves the technical problems in the prior art that the ultimate tensile length of the anchor is small, prone to functional overload failure and lack of flexible support capability

Method used

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  • Pressing seam type friction type constant-resistance anchor rod
  • Pressing seam type friction type constant-resistance anchor rod
  • Pressing seam type friction type constant-resistance anchor rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Without loss of generality, figure 1 As shown, the present invention provides a seam-type frictional constant resistance anchor rod, including: a sleeve 1, a rod body 2, a tray 3 and a pressure block 4;

[0055] Rod body 2 comprises from top to bottom: solid section 2-1, constant resistance section 2-2, conical section 2-3, friction section 2-4 and free section 2-5 (cross-section as Figure 4 shown); figure 2 As shown, the solid section 2-1 is a cylindrical solid structure, and is tightly connected with the upper end of the constant resistance section 2-2 by threads or welding (the solid section 2-1 and the constant resistance section 2-2 of the present invention can also be made into integrated structure); solid section 2-1, constant resistance section 2-2, conical section 2-3 and friction section 2-4 are integrated structure; constant resistance section 2-2, conical section 2-3, The friction section 2-4 and the free section 2-5 are metal pipes with the same wall th...

Embodiment 2

[0060] Image 6 As shown, on the basis of Example 1, the side wall of the friction section 2-4 of the rod body 2 is processed from top to bottom in the axial direction with a notch having the same width as the tapered section 2-3, and the further extended notch length Provides structural support for deformation.

[0061] It should be noted that in the above technical solution, the sidewalls of the constant resistance section 2-2, the tapered section 2-3 and the friction section 2-4 have the same width of the gap from top to bottom in the axial direction. The length of the constant resistance section 2-2, the tapered section 2-3, the friction section 2-4 and the free section 2-5 is designed according to the depth of the plastic zone of the surrounding rock.

[0062] Further, in a preferred technical solution of this embodiment, the top end of the sleeve 1 is fastened with a top cover 1-4 that seals its inner cavity, so that when it is inserted into the grouting anchor hole, it...

Embodiment 3

[0064] Figure 7 As shown, in order to allow the rod body 2 to extend better, the present invention also includes a PVC pipe 2-7 on the basis of Embodiment 1; The taper required for extrusion sealing is formed at the place, and the PVC pipe 2-7 is socketed at the lower end of the fine hole section 1-3, and heat sealing or binding sealing is adopted at the socketing place. The required rope for binding and sealing can be hemp rope. In this embodiment, the briquetting block 4 is threadedly connected to the connecting end; in this embodiment, the sealing cover 5 of the sealing tray 3, the briquetting block 4 and the connecting end is also included, and the sealing cover 5 is connected between the sealing tray 3, the briquetting block 4 and the connecting end. When the ends are connected, the remaining voids in the inner cavity are filled with cement mortar. In this embodiment, the material of the sleeve 1 is hard alloy or high-quality steel; the side wall of the sleeve 1 is eve...

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Abstract

The invention relates to the technical field of engineering supporting, in particular to a pressing seam type friction type constant-resistance anchor rod. By means of the anchor rod, the technical problems that in the prior art, the ultimate tensile length of an anchor rod is small, function overload failure occurs easily, and the flexible supporting capacity is not achieved are solved. The anchor rod structurally comprises a sleeve, a rod body, a tray and a pressing block. The rod body comprises an entity segment, a constant-resistance segment, a conical segment, a friction resistance segment and a free segment from top to bottom. The entity segment is of a cylindrical solid structure. The side walls of the constant-resistance segment, the conical segment and the friction resistance segment are provided with gaps with the same width from top to bottom in the axial direction. The outer diameter of the constant-resistance segment is larger than that of the friction resistance segment. The outer diameter of the axial section of the rod body gradually diseases continuously and is in transition to the outer diameter of the friction resistance segment from the outer diameter of the constant-resistance segment in the axial direction through the conical segment The sleeve comprises a rough-hole segment, a conical-hole segment and a thin-hole segment and is matched with the rod body in inner diameter. The anchor rod is not damaged when a surrounding rock is greatly deformed, larger displacement of the rod body is allowed so as to adapt to deformation of the surrounding rock, the surrounding rock deformation energy can be continuously absorbed, and the stability of the surrounding rock is maintained.

Description

technical field [0001] The invention relates to the technical field of engineering support, in particular to a seam-pressing frictional constant-resistance anchor. Background technique [0002] During the construction of large-scale hydropower, highways, railways and other infrastructure, it is inevitable to encounter the excavation and support of tunnels and underground chambers. In particular, the deep-buried and long tunnels in the southwestern mountainous area have strong tectonic activities, large regional tectonic stress, and surrounding rocks are often in a state of high ground stress. At this time, the surrounding rock often exhibits the characteristics of "large deformation" under the condition of high ground stress, which is specifically manifested as large deformation of soft rock, large deformation of rockburst, large deformation of impact, and large deformation of gas outburst. However, the ultimate tensile length of the anchor bolts in the prior art is small. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E21D20/00
CPCE21D20/00E21D20/003E21D21/0026E21D21/0033
Inventor 孟陆波李天斌陈超高美奔
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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