CN212898562U - Let pressure stock - Google Patents
Let pressure stock Download PDFInfo
- Publication number
- CN212898562U CN212898562U CN202022003778.1U CN202022003778U CN212898562U CN 212898562 U CN212898562 U CN 212898562U CN 202022003778 U CN202022003778 U CN 202022003778U CN 212898562 U CN212898562 U CN 212898562U
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- CN
- China
- Prior art keywords
- sleeve
- section
- shearing
- anchor
- anchor head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000010008 shearing Methods 0.000 claims abstract description 64
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 abstract description 9
- 239000011435 rock Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model discloses a let and press stock relates to stock technical field, include: the rod body is arranged in the sleeve in a sliding mode; the body of rod includes in proper order: anchor section, free section and shearing section, the shearing section slides and sets up in the sleeve, be equipped with shearing screw thread on the outer wall of shearing section, the one end that the free section was kept away from to the shearing section is equipped with the anchor head, the anchor head set up in the sleeve and with sleeve sliding connection, the one end that the sleeve is close to the anchoring section is equipped with the fender ring, the internal diameter that keeps off the ring is less than telescopic internal diameter, shearing screw thread, the external diameter of anchor head all is greater than the internal diameter that keeps off the ring, should let and press stock simple structure, engineering simple to operate, easily popularization, and have the big deformability of constant resistance, can effectively cushion the deformation pressure.
Description
Technical Field
The utility model relates to an anchor rod technical field, concretely relates to let and press anchor rod.
Background
The anchor rod and the anchor cable are used as an active rock-soil body reinforcing structure and have a large number of applications in the field of supporting of projects such as tunnels, slopes and the like. Traditional anchor rods and anchor cables mostly belong to rigid structures made of metal materials, have sufficient supporting resistance and have poor deformation adaptability. The impact on dynamic loads such as large deformation of rock mass, earthquake and the like is often avoided, and the phenomenon of instability of geotechnical engineering caused by the fact that anchor rods and anchor cables are broken or loosened occurs occasionally. Therefore, a yielding bolt capable of effectively buffering the deformation pressure is necessary.
At present, the large deformation anchor rod can be roughly divided into three types in principle: one is the ability to provide large deformations by virtue of the ductility of the material of the (part of the) anchor body itself, such as the D-Bolt developed by professor li chunling et al. The anchor rod has simple structure and convenient process, is similar to the common anchor rod, but has the allowable deformation related to the ductility of the material, so the deformation is smaller and the requirement on the material is higher; the second method is to add a friction type constant resistor to obtain constant resistance and large deformation capacity, which is also the common method at present. In order to provide enough supporting resistance, the manufacturing process and the use requirement of the friction constant resistor are generally higher, and the friction body can lose efficacy due to aging, corrosion and other reasons in the application process; the third is the ability of providing support resistance and large deformation by using a cutting tool to realize shearing destruction on a shearing sleeve and the like, for example, in the existing scheme, the cutting tool is provided with a shearing core, a certain deformation space can be provided for the anchor rod by shearing the shearing core, but a certain distance exists between the adjacent shearing cores, constant support resistance cannot be provided, and even short time of losing the support resistance exists, namely the design scheme lacks minimum support resistance. In addition, a special annular cutting prop is adopted to groove the large-outer-diameter sections of the anchor rod and the anchor cable so as to provide constant support resistance. The proposal has high requirements on the materials of the cutter and the anchor rod body, has high corresponding manufacturing cost and is inconvenient for large-scale popularization and application. The installation of the anchor rod on site and the use environment are complex, and the cutting effect of the cutter is difficult to ensure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a let and press stock, this let and press stock simple structure, engineering simple to operate, easily popularization to have the big deformability of constant resistance, can effectively cushion deformation pressure.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a yielding bolt comprising: the rod body is arranged in the sleeve in a sliding mode; the body of rod includes in proper order: anchor section, free section and shearing section, the shearing section slides and sets up in the sleeve, is equipped with the shearing screw thread on the outer wall of shearing section, and the one end that the free section was kept away from to the shearing section is equipped with the anchor head, the anchor head setting in the sleeve and with sleeve sliding connection, the sleeve is close to the one end of anchor section and is equipped with the fender ring, and the internal diameter that keeps off the ring is less than telescopic internal diameter, and the external diameter of shearing screw thread, anchor head all is greater than the internal diameter that keeps off the ring.
The yielding anchor rod is characterized in that a sleeve is arranged at one end of a rod body, the rod body is divided into three sections which are an anchoring section, a free section and a shearing section in sequence, the anchoring section is arranged in a rock body, the shearing section is arranged in the sleeve, the free section is arranged between the anchoring section and the shearing section, a shearing thread is arranged on the outer wall of the shearing section, an anchor head is arranged at the end part of the shearing section, a retaining ring is arranged at the end part of the sleeve, the shearing thread and the anchor head can slide in the sleeve, when the shearing thread slides to the retaining ring, the shearing thread is sheared by the retaining ring, as the shearing thread is of a continuous structure, the supporting force of the rod body is continuous and constant in the shearing process, a certain distance is provided for the deformation of the rock body, when the deformation amount of the surrounding rock reaches the maximum, the retaining ring stops shearing the shearing thread, so that a constant supporting force is provided for the surrounding rock, and under an extreme condition, when the shearing thread, the anchor head can not be sheared, and the rod body can not move continuously at the moment, so that the surrounding rock is prevented from further deforming and collapsing.
Further, in a preferred embodiment of the present invention, the outer diameter of the anchor head matches the inner diameter of the sleeve.
The outer diameter of the anchor head is equal to the inner diameter of the sleeve, so that the anchor head can stably move in the sleeve, and the frictional resistance of the anchor head and the sleeve can provide a certain supporting force for surrounding rocks.
Further, in the preferred embodiment of the present invention, the free section is slidably disposed in the sleeve near the end of the shearing section, and the inner wall of the sleeve and the outer wall of the anchor head are respectively provided with a rough surface layer.
The telescopic inner wall and the outer wall of anchor head are equipped with rough top layer respectively, increase the frictional force between anchor head and the sleeve, and the one end that the free end is close to the shearing section has one end to set up in the sleeve to when the country rock produced the deformation, the anchor head removed in the sleeve, produced sliding friction, when shearing screw motion to fender ring, produced shearing resistance again, sliding friction resistance and shearing resistance provide the supporting power for the rock mass is out of shape together.
Further, in the preferred embodiment of the present invention, an end of the sleeve away from the rod body is provided with a tray and a fixing nut.
The sleeve is used for fixing the sleeve through the tray and the fixing nut.
Further, in the preferred embodiment of the present invention, the cross section of the sleeve is a ring structure, and the cross sections of the rod body and the anchor head are circular structures.
The sleeve, the rod body and the anchor head are all of a structure with a circular cross section and an outer contour, and the structure is the same as a structure commonly used in the existing engineering.
The utility model discloses following beneficial effect has:
the utility model provides a let press stock, should let press stock through the body of rod and remove in the sleeve, through frictional resistance and shear resistance, provide continuous, invariable support power for the rock mass when providing big deformation space for the rock mass, guarantee to strut reliably in the surrounding rock deformation, when warping and finishing, can provide invariable support power for the rock mass, avoid the rock mass to further warp; the device has simple integral structure, convenient engineering installation and easy popularization and use.
Drawings
Fig. 1 is a sectional view of the yielding anchor rod of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a first cross-sectional view of the installation structure of the yielding anchor rod of the present invention;
fig. 4 is a sectional view of the mounting structure of the yielding anchor rod of the present invention;
fig. 5 is a third sectional view of the installation structure of the yielding anchor rod of the present invention.
Wherein: 1-a sleeve; 11-a baffle ring; 2-a rod body; 21-an anchor segment; 22-free section; 23-cutting into sections; 231-shearing threads; 3-anchor head; 4-a tray; 5-fixing the nut; 6-anchor hole.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Examples
Referring to fig. 1 and 2, a yielding bolt comprising: sleeve 1 and the body of rod 2 of slip setting in sleeve 1, sleeve 1 passes through tray 4 and fixation nut 5 to be fixed at support wall body or subaerial, and the body of rod 2 includes in proper order: anchor section 21, free segment 22 and shearing section 23, anchor section 21 sets up in the rock mass that needs to be strutted, and shearing section 23 slides and sets up in sleeve 1, is equipped with shearing screw thread 231 on the outer wall of shearing section 23, and the one end that free segment 22 was kept away from to shearing section 23 is equipped with anchor head 3, and anchor head 3 sets up in sleeve 1 and with sleeve 1 sliding connection, the external diameter of anchor head 3 and the internal diameter phase-match of sleeve 1. One end of the free section 22 close to the shearing section 23 is arranged in the sleeve 1 in a sliding mode, and the inner wall of the sleeve 1 and the outer wall of the anchor head 3 are respectively provided with a rough surface layer. One end of the sleeve 1 close to the anchoring section 21 is provided with a baffle ring 11, the inner diameter of the baffle ring 11 is smaller than that of the sleeve 1, and the outer diameters of the shearing thread 231 and the anchor head 3 are both larger than that of the baffle ring 11. The cross section of the sleeve 1 is of an annular structure, and the cross sections of the rod body 2 and the anchor head 3 are of circular structures.
In actual construction, firstly, an anchoring section 21 and a free section 22 of a rod body 2 required by roadway support are selected according to anchoring design specifications, a shearing section 23 is formed by processing a shearing thread 231 at one end of the rod body 2 by adopting a manufacturing process specified by the specifications, the free section 22 and the anchoring section 21 are connected into a whole by using a steel bar connecting sleeve, an anchor head 3 is welded at the end part of the shearing section 23, then a sleeve 1 with a retaining ring 11 and a tray 4 are manufactured by processing, and the strength of the retaining ring 11 is higher than the shearing strength of the shearing thread 231.
During installation, firstly, an anchoring agent is injected into a drilled anchor hole 6, then, the installed rod body 2 and the installed sleeve 1 are inserted, an anchor net is hung on the wall of a tunnel, a fixing nut 5 is adjusted, and the sleeve 1 and the tray 4 are fixed together, and the device is shown in a schematic structural diagram when the device is just installed in reference to fig. 3. Referring to fig. 4, in the supporting process, when the surrounding rock deforms, the rod body 2, the sleeve 1 and the baffle ring 11 generate relative displacement, firstly, the anchor head 3 slides in the sleeve 1 to generate friction resistance, after the shearing threads 231 contact the baffle ring 11, the baffle ring 11 can continuously shear the shearing threads 231, and as the shearing threads 231 are continuous, the shearing force is constant and continuous in the shearing process, so that constant supporting force is provided for the rock body, referring to fig. 5, the length of the shearing threads 231 is greater than the allowable deformation amount of the surrounding rock, and after the shearing threads 231 with a certain length are sheared, the supporting resistance provided by the anchor rod is balanced with the pressure of the surrounding rock, the shearing stops, so that the further deformation of the surrounding rock is slowed down and prevented.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A yield anchor rod, comprising: the device comprises a sleeve (1) and a rod body (2) arranged in the sleeve (1) in a sliding mode; the body of rod (2) includes in proper order: anchor section (21), free section (22) and shearing section (23), shearing section (23) slide and set up in sleeve (1), be equipped with shearing screw thread (231) on the outer wall of shearing section (23), shearing section (23) are kept away from the one end of free section (22) is equipped with anchor head (3), anchor head (3) set up in sleeve (1) and with sleeve (1) sliding connection, sleeve (1) are close to the one end of anchor section (21) is equipped with keeps off ring (11), the internal diameter that keeps off ring (11) is less than the internal diameter of sleeve (1), shear screw thread (231) the external diameter of anchor head (3) all is greater than keep off the internal diameter of ring (11).
2. A yielding bolt according to claim 1, characterised in that the outer diameter of the anchor head (3) matches the inner diameter of the sleeve (1).
3. The yielding bolt according to claim 2, characterized in that one end of the free section (22) close to the shearing section (23) is slidably arranged in the sleeve (1), and the inner wall of the sleeve (1) and the outer wall of the anchor head (3) are respectively provided with a rough surface layer.
4. A yield bolt according to any one of claims 1-3, characterized in that the end of the sleeve (1) remote from the body (2) is provided with a tray (4) and a fixing nut (5).
5. A yield bolt according to claim 4, characterised in that the cross-section of the sleeve (1) is of annular configuration, and the cross-sections of the shank (2) and the anchor head (3) are of circular configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022003778.1U CN212898562U (en) | 2020-09-14 | 2020-09-14 | Let pressure stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022003778.1U CN212898562U (en) | 2020-09-14 | 2020-09-14 | Let pressure stock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212898562U true CN212898562U (en) | 2021-04-06 |
Family
ID=75257548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022003778.1U Expired - Fee Related CN212898562U (en) | 2020-09-14 | 2020-09-14 | Let pressure stock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212898562U (en) |
-
2020
- 2020-09-14 CN CN202022003778.1U patent/CN212898562U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210406 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |