CN214577112U

CN214577112U - Shearing-resistant self-repairing large-deformation anchor rod

Info

Publication number: CN214577112U
Application number: CN202120491884.0U
Authority: CN
Inventors: 吴学震; 郑含芳; 丁砚涛; 杨黎宏
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-11-02
Anticipated expiration: 2031-03-09

Abstract

The utility model relates to a self-repairing large deformation stock shears is applicable to all kinds of civil engineering and mining engineering's strut stock, including the cavity stock body, be provided with the segmentation vesicle that the shell is brittle material in the inner chamber of the cavity stock body, contain prosthetic materials in the segmentation vesicle, tray and spiro union have the nut have been put to the one end cover of the cavity stock body. The anchor rod solves the problems of anchor rod damage and corrosion caused by anchor rod anchoring body fracture due to joint shear deformation.

Description

Shearing-resistant self-repairing large-deformation anchor rod

Technical Field

The utility model relates to a self-repairing large deformation stock shears.

Background

Traditional research is mainly focused on tensile failure of the anchor rod, however, engineering field investigation shows that the failure of the anchor rod is caused by shearing deformation of rock mass at joint surfaces in large part. Shear failure of the structural faces of rock formations, or of the rock mass itself, is an important form of rock formation failure, particularly in high seismic zone fracture zones, for rock formations. At the joint of rock mass, crack position, the anchoring agent and the anticorrosive structure of stock are very easy breakage under the shearing action, because groundwater, air pass through the broken zone back direct contact stock to can produce serious corruption to the local position of stock, the whole bearing capacity of greatly reduced stock.

In the prior art, patent number CN201711249469.9 proposes "a sleeve device for anchor rod corrosion prevention and anchor rod corrosion prevention construction method", two sleeves of different sizes are sleeved on an anchor rod, so that the anchor rod is provided with two layers of corrosion prevention layers of cement mortar and anti-seepage liquid, but after a joint is damaged by shearing deformation, the anchor rod still corrodes and cannot work for a long time. Patent No. CN105840223A provides "a big deformation selfreparing anti rock burst stock", the stock is letting to press the deformation in, and A component adhesive can be extruded to B component adhesive, mixes and generates the foam adhesive, fills in the crack that the rock mass deformation produced. However, because it is necessary to ensure that the adhesive of the component A is sufficiently extruded to be mixed with the adhesive of the component B, the repairing function of the anchor rod can only be exerted when the surrounding rock generates large tensile deformation, and the repairing material of the anchor rod can only overflow from a certain part of the anchor rod, so that the problem of anchor rod corrosion caused by anchor rod anchoring agent fracture due to joint shear deformation cannot be solved.

Disclosure of Invention

An object of the utility model is to provide a self-repairing large deformation stock shears, and this stock has solved joint shear deformation and has leaded to the stock that the stock anchor body broke and causes to destroy and the corrosion problem.

The technical scheme of the utility model lies in: the utility model provides a big deformation stock of self-healing that shears, includes the cavity stock body, be provided with the segmentation vesicle that the shell is brittle material in the inner chamber of the cavity stock body, contain the prosthetic materials in the segmentation vesicle, the tray has been put to the one end cover of the cavity stock body and the spiro union has the nut.

Furthermore, the hollow anchor rod body is a hole-type hollow anchor rod body, the surface of the hole-type hollow anchor rod body is provided with a row of small holes at intervals along the axial direction, the small holes are communicated with the inner cavity of the hollow anchor rod body, and segmented vesicles which are in one-to-one correspondence with the small holes are arranged at intervals along the axial direction in the inner cavity of the hollow anchor rod body.

Furthermore, the hollow anchor rod body is a C-shaped hollow anchor rod body with a C-shaped cross section, and segmented vesicles are axially arranged in the inner cavity of the hollow anchor rod body at intervals.

Further, the repair material is a water-swellable material; or the repairing material is a combination of an adhesive material and a water-swelling material.

Further, the water-swellable material is a polyurethane resin material.

Further, a compression balloon is arranged in the segmented vesicle.

Further, the number of the segmented vesicles is not less than 5 or the individual length is not more than 30 cm.

Further, the outside of the hollow anchor rod is coated with an anchoring agent.

Compared with the prior art, the utility model has the advantages of it is following: after the position of the rock mass crack is deformed under the action of shear load, the anchoring body is broken, the segmented vesicle is also damaged, the repairing material contained in the segmented vesicle automatically flows out or flows out under the extrusion of the expansion material and permeates into the broken anchoring body and the cracks of the surrounding rock mass, the bonding repairing effect can be achieved, the anchor rod can play a role in supporting again, meanwhile, underground water and air are prevented from contacting the anchor rod to avoid corrosion, and the service life of the anchor rod is prolonged. The repair material can flow out in sections, multiple targeted repairs can be carried out, and the waste of the repair material can not be caused.

Drawings

FIG. 1 is a schematic longitudinal section view of a hole-type shear-resistant self-repairing large-deformation anchor rod of the present invention;

FIG. 2 is a schematic longitudinal section of the C-shaped shear-resistant self-repairing large deformation anchor rod of the present invention;

FIG. 3 is a schematic cross-sectional view of the C-shaped shear-resistant self-repairing large deformation anchor rod of the present invention;

in the figure: 1-a hollow anchor rod body; 2-a nut; 3-a tray; 4-an anchoring agent; 5-small holes; 6-segmented vesicles; 7-groove section.

Detailed Description

In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.

Example one refer to FIG. 1

A shear-resistant self-repairing large-deformation anchor rod comprises a hollow anchor rod body 1, wherein a segmented vesicle 6 with a brittle material shell is arranged in an inner cavity of the hollow anchor rod body, a repairing material is contained in the segmented vesicle, and a tray 3 is sleeved at one end of the hollow anchor rod body and is in threaded connection with a nut 2; when the hollow anchor rod body is arranged in the anchor hole, the surface is coated with an anchoring agent 4 so as to be connected and anchored with the anchor hole.

In this embodiment, the hollow anchor rod body is a hole-type hollow anchor rod body, a row of small holes 5 are axially arranged on the surface of the hollow anchor rod body at intervals, the small holes are communicated with the inner cavity of the hollow anchor rod body, and segmented vesicles 6 corresponding to the small holes one by one are axially arranged in the inner cavity of the hollow anchor rod body at intervals. When a certain position of the hollow anchor rod body is cut and broken, the segmented vesicle shell near the broken position can be damaged, the repairing material flows out from the small hole near the broken position and permeates into the broken anchoring body and the cracks of the surrounding rock mass, the bonding repairing effect can be achieved, the anchor rod can play a role in supporting again, meanwhile, underground water and air are prevented from contacting the anchor rod to avoid corrosion, and the service life of the anchor rod is prolonged. And the sectional vesicles at other positions are not affected, and the joint cutting device can play a role again when joint shearing is generated at the corresponding rock joint.

In this embodiment, repair material is for meeting water inflation material, meet water inflation material and be polyimide gum resin material etc. and polyimide gum resin material produces the associative reaction when meeting water after the water, takes place the inflation, under the effect of inflation pressure, is impressed anchor body and splits district and rock mass gap.

In this embodiment, repair material still can be gluing material and the assembly of meeting water inflation material, wherein meet water inflation material for polyimide gum material etc. meets water inflation material and expands after meeting water, and then extrudes into anchor body rupture zone and rock mass gap with gluing material, gluing material makes its anchor effect of exerting once more with broken anchor body bonding to isolated groundwater and air.

In this embodiment, a compression balloon is disposed in the segmented vesicle, so that after the segmented vesicle is locally damaged by extrusion, the compression balloon expands to extrude the repair material.

In this embodiment, the number of the segmented vesicles is not less than 5 or the individual length is not more than 30 cm.

Example two referring to fig. 2 and 3

In this embodiment, the hollow anchor rod body is a C-shaped hollow anchor rod body with a C-shaped cross section, that is, a groove section 7 is axially arranged along the surface of the anchor rod body, and segmented vesicles 6 are axially arranged in the inner cavity of the hollow anchor rod body at intervals. When the rock mass joint shearing dislocation is produced to a certain position of the hollow anchor rod body, when the anchoring agent is broken, the shell of the segmented vesicle at the position can also be damaged, the repairing material flows out from the groove section near the broken part automatically or under the extrusion of the expansion material, the seepage enters the cracks of the broken anchor body and the surrounding rock mass, the effect of bonding repair can be played, the anchor rod is enabled to exert the supporting effect again, meanwhile, underground water and air are prevented from contacting the anchor rod to avoid corrosion, and the service life of the anchor rod is prolonged.

When the anchor rod is used, an anchor hole is drilled in a rock mass to be supported, and the diameter of the anchor hole is larger than that of the anchor rod; the anchor rod is stretched into the anchor hole, and the anchoring end of the shear-resistant self-repairing large-deformation anchor rod is fixed in the anchor hole through an anchoring agent; the sleeve disc is sleeved at the outer end of the anchor rod, and the outer end of the anchor rod is fixed outside the anchor hole through the nut, so that the anchor rod can be installed.

The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.

Claims

1. The utility model provides a big deformation stock of self-healing that shears, includes the cavity stock body, its characterized in that, be provided with the segmentation vesicle that the shell is fragile material in the inner chamber of the cavity stock body, contain the repair materials in the segmentation vesicle, the tray has been put to the one end cover of the cavity stock body and the spiro union has the nut.

2. The shear-resistant self-repairing large-deformation anchor rod of claim 1, wherein the hollow anchor rod body is a hole-type hollow anchor rod body, a row of small holes are axially arranged on the surface of the hollow anchor rod body at intervals, the small holes are communicated with the inner cavity of the hollow anchor rod body, and segmented vesicles which are in one-to-one correspondence with the small holes are axially arranged in the inner cavity of the hollow anchor rod body at intervals.

3. The shear-resistant self-repairing large-deformation anchor rod of claim 1, wherein the hollow anchor rod body is a C-shaped hollow anchor rod body with a C-shaped cross section, and segmented vesicles are axially arranged in an inner cavity of the hollow anchor rod body at intervals.

4. A shear-resistant self-repairing large deformation anchor rod according to claim 1, 2 or 3, wherein the repairing material is a water-swellable material; or the repairing material is a combination of an adhesive material and a water-swelling material.

5. The shear-resistant self-repairing large deformation anchor rod of claim 4, wherein the water-swellable material is a polyurethane mastic material.

6. A shear-resistant self-repairing large deformation anchor rod according to claim 1, 2 or 3, wherein the segmented vesicle is provided with a compression balloon therein.

7. A shear-resistant self-repairing large deformation anchor rod according to claim 1, wherein the number of the segmented vesicles is not less than 5 or the length of each segmented vesicle is not more than 30 cm.

8. The shear-resistant self-repairing large deformation anchor rod of claim 1, wherein the hollow anchor rod is coated with an anchoring agent.