CN108756974B - Anti-shearing large-deformation anchor rod - Google Patents
Anti-shearing large-deformation anchor rod Download PDFInfo
- Publication number
- CN108756974B CN108756974B CN201810381256.XA CN201810381256A CN108756974B CN 108756974 B CN108756974 B CN 108756974B CN 201810381256 A CN201810381256 A CN 201810381256A CN 108756974 B CN108756974 B CN 108756974B
- Authority
- CN
- China
- Prior art keywords
- sleeve
- resistance block
- rolling shaft
- rod body
- constant
- 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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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
Abstract
The invention discloses an anti-shearing large-deformation anchor rod which comprises an anchoring section rod body, a free section rod body, a sleeve, a constant resistance block and a connecting sleeve, wherein the constant resistance block and the free section rod body are connected together through the connecting sleeve, the connecting sleeve can generate elastic deformation, the free section rod body is positioned at the lower part of the connecting sleeve, the constant resistance block is positioned at the upper part of the connecting sleeve, the constant resistance block is arranged in the sleeve, the upper end of the sleeve is fixedly connected with the anchoring section rod body, a rolling shaft is arranged in the sleeve, and the rolling shaft can move in the sleeve. The invention realizes the constant resistance large deformation idea of the anchor rod, improves the service life and the anti-shearing capability of the anchor rod and avoids potential safety hazards.
Description
Technical Field
The invention relates to an anchor rod, in particular to an anti-shearing large-deformation anchor rod.
Background
Since 1912, the scherzetz mine in germany firstly adopts the anchor rod to support the underground roadway, and the anchor rod support is widely applied to various civil engineering and mining engineering due to the characteristics of simple structure, convenient construction, lower cost, strong adaptability to engineering and the like. For example, in the three gorges project of China, a large number of anchor rods and anchor cables are used for maintaining and excavating side slopes and rock walls in the dam construction.
The core of the existing anchoring technology is as follows: the pull rod piece is driven into the rock-soil layer, the shear strength of the anchor rod and the rock-soil body around the anchor rod is utilized to transfer the pulling force of the structure, the stability of the stratum excavation surface is ensured, meanwhile, the resistance force acting on the structure to bear the external load is provided, the anchored stratum generates a compressive stress area and has a reinforcement effect on the reinforced stratum, the strength of the stratum is enhanced, the mechanical property of the stratum is improved, the structure and the stratum are linked together, and a co-working composite body is formed to bear the external force.
The region of China is vast, the difference between the landform and the geological conditions of different regions and engineering is large, particularly in recent years, the policy begins to incline towards the region of the Chinese and western regions, a large number of various capital construction projects are built, and as is well known, the region of the Chinese and western regions integrates most of the regions with complex geological conditions in China, which is a great challenge for the existing engineering construction equipment and technology, particularly the anchor rod technology which is widely applied and extremely important.
The anchor rod plays an important role in maintaining the stability of civil engineering as one of the main support forms of underground engineering and side slopes, but the basic theory and the working principle of the anchor rod are hardly updated in the past hundred years, which is contradictory to the continuous development and progress of other human engineering techniques. For example, the existing common anchor rod has the outstanding problems that the service life is shortened, the anchor rod needs to be replaced frequently and the shear stress is difficult to resist in the engineering construction of certain high ground stress and crack development areas, which is extremely unfavorable for the stability and safety of the engineering.
Aiming at the problems of anchor rod design and updating and upgrading of working principles, many people put forward own anchor rod design conception and scheme from the aspects of new material application, structural design and the like. For example: the HMG type constant-resistance large-deformation anchor rod can absorb energy. The anchor rod is different from other existing energy absorption anchor rod structural characteristics, not only can provide larger supporting resistance and structural deformation, but also has constant resistance mechanical characteristics, the problem of anchor rod ground vertical deformation damage is well solved by the novel anchor rod, the novel anchor rod can be applied to deep large-deformation roadway problems, and the problem of anchor rod horizontal deformation damage cannot be solved by the novel anchor rod in landslide control.
Disclosure of Invention
In view of this, the embodiment of the invention provides an anti-shearing large-deformation anchor rod which can improve the anti-shearing capability of the anchor rod, control the transverse deformation of the anchor rod and avoid potential safety hazards.
The embodiment of the invention provides an anti-shearing large-deformation anchor rod which comprises an anchoring section rod body, a free section rod body, a sleeve, a constant resistance block and a connecting sleeve, wherein the constant resistance block and the free section rod body are connected together through the connecting sleeve, the connecting sleeve can elastically deform, the free section rod body is positioned at the lower part of the connecting sleeve, the constant resistance block is positioned at the upper part of the connecting sleeve, the constant resistance block is arranged in the sleeve, the upper end of the sleeve is fixedly connected with the anchoring section rod body, a rolling shaft is arranged in the sleeve, and the rolling shaft can move in the sleeve.
Further, the sleeve includes roof and both ends open-ended square tube, the roof is in the top of square tube to with square tube integrated into one piece, the end of the top surface welding anchor section body of rod of roof, be equipped with the passageway in the both sides wall of square tube, the passageway supplies the roller bearing to remove.
Further, the channel comprises a linear channel and a curved channel, the curved channel forms an upward slope along the moving direction of the roller, and the linear channel and the curved channel are arranged in a staggered mode.
Further, the roller bearing includes a connecting axle and two roll axles, and two roll axles are established in the outside of connecting axle, the diameter of roll axle is less than the connecting axle, the length of connecting axle and the distance looks adaptation between the sleeve both sides wall, the length of roll axle and the thickness looks adaptation of sleeve lateral wall, the roller bearing runs through telescopic both sides wall, the connecting axle is located the sleeve, the roll axle is located the passageway.
Further, the outer side of the rolling shaft is sleeved with a nut, the diameter of the nut is larger than that of the rolling shaft, the nut is located on the outer side of the side wall, an external thread is arranged on the outer side of the rolling shaft, and the nut is provided with an internal thread matched with the external thread.
Further, the constant resistance block is an irregular cylinder, one side of the constant resistance block is higher than the other side, and the higher side of the constant resistance block is provided with a slope and interacts with the rolling shaft.
Further, the constant resistance block includes square column and right trapezoid post, square column and right trapezoid post integrated into one piece, right trapezoid post establishes in one side top of square column, and right trapezoid post and base are that the height of right angled waist and square column on a straight line, another waist of right trapezoid post links up with the length of square column mutually.
Further, the constant resistance block is made of high-strength alloy materials, the anchoring section rod body is made of twisted steel, the connecting sleeve is a nylon material sleeve, and the surface roughness of the rolling shaft is large.
Compared with the prior art, the invention has the following beneficial effects: (1) the constant-resistance block can move a set longer distance in the sleeve, and then the free section rod body of the anchor rod can transversely move a distance through the nylon material sleeve, so that the constant-resistance large-deformation concept of the anchor rod is realized, and the service life of the anchor rod is prolonged. (2) By using the structure of the belt buckle for reference, the anchor rod can be transversely deformed, and the anti-shearing capacity of the anchor rod is improved. (3) The transverse deformation of the anchor rod is controlled by the interaction of the rolling shaft and the constant-resistance block, the constant-resistance block can be effectively controlled to move forwards in the sleeve under the action of the thrust of the landslide and cannot move backwards, and potential safety hazards are avoided.
Drawings
Fig. 1 is a schematic view of a shear resistant large deformation rock bolt of the present invention.
Fig. 2 is a schematic view of the sleeve and roller of fig. 1.
Fig. 3 is a schematic view of the roller of fig. 1.
Fig. 4 is a schematic view of the constant resistance block and roller of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a shear-resistant large deformation anchor rod, which includes an anchoring section rod body 1, a free section rod body 2, a sleeve 3, a constant resistance block 5 and a connecting sleeve 6.
The anchoring section rod body 1 is made of twisted steel, and the anchoring section rod body 1 is fixedly connected with the upper end of the sleeve 3.
Referring to fig. 2, the sleeve 3 is a rectangular column with one closed end and one unsealed end, the interior of the rectangular column is hollow, the sleeve 3 includes a top plate 31 and a square tube 32 with two open ends, the top plate 31 is above the square tube 32 and is integrally formed with the square tube 32, the top surface of the top plate 31 is welded to the end of the rod body 1 of the anchoring section, a roller 4 is arranged in the sleeve 3, the roller 4 can move in the sleeve 3, preferably, channels 321 are arranged in two side walls of the square tube 32, and the channels 321 are used for the roller 4 to move.
The passage 321 includes a linear passage 3211 and a curved passage 3212, the curved passage 3212 forms an upward gradient along the moving direction of the roller 4, the linear passage 3211 and the curved passage 3212 are arranged in a staggered manner, that is, one section of the linear passage 3211 is connected to one section of the curved passage 3212, the curved passage 3212 is connected to another section of the linear passage 3211, and the roller 4 passes through the curved passage 3212 under a great force, so that the durability and the practicability of the anchor rod are improved.
Referring to fig. 3, the roller 4 may provide a large friction force, the roller 4 includes a connecting shaft 41 and two rolling shafts 42, the two rolling shafts 42 are disposed outside the connecting shaft 41, a diameter of the rolling shaft 42 is smaller than that of the connecting shaft 41, a length of the connecting shaft 41 is adapted to a distance between inner walls of two side walls of the sleeve 3, the length of the rolling shaft 42 is adapted to a thickness of the side wall of the sleeve 3, the roller 4 penetrates through the two side walls of the sleeve 3, the connecting shaft 41 is located in the sleeve 3, and the rolling shaft 42 is located on the channel 321. Ensuring that the roller 4 moves along the channel 321 inside the sleeve 3.
The outer side of the rolling shaft 42 is sleeved with a nut 7, the diameter of the nut 7 is larger than that of the rolling shaft 42, the diameter of the nut 7 is matched with that of the connecting shaft 41, the nut 7 is located on the outer side of the side wall, an external thread (not shown in the figure) is arranged on the outer side of the rolling shaft 42, and the nut 7 is provided with an internal thread (not shown in the figure) matched with the external thread. The nut 7 is used for preventing the roller 4 from slipping out of the sleeve 3 in the sliding process, and the roller 4 is convenient to disassemble, the surface roughness of the roller 4 is large, and the roller 4 can act together with the constant resistance block 5 to ensure that the roller 4 slides in the sleeve 3 under the action of large constant resistance.
Referring to fig. 4, the constant resistance block 5 is made of high strength alloy material, and can maintain a large constant resistance, the constant resistance block 5 is an irregular cylinder, one side of the constant resistance block 5 is higher than the other side, the higher side has a slope, and interacts with the roller 4, and the constant resistance block 5 is in the sleeve 3. The constant resistance block 5 can cooperate with the roller 4 to provide a constant resistance.
Preferably, the constant resistance block 5 comprises a square column 51 and a right trapezoid column 52, the square column 51 and the right trapezoid column 52 are integrally formed, the right trapezoid column 52 is arranged above one side of the square column 51, the waist of the right trapezoid column 52, which is at right angle with the bottom, is in the same straight line with the height of the square column, and the other waist of the right trapezoid column 52 is connected with the length of the square column 51.
The connecting sleeve 6 is made of nylon materials, the connecting sleeve 6 can elastically deform, is corrosion-resistant and strong in tensile strength, can elastically deform greatly without being damaged, and can be well sleeved with the free-section rod body 2 and the constant-resistance block 5 to form linkage.
The constant-resistance block 5 is connected with the free section rod body 2 through the connecting sleeve 6, the free section rod body 2 is positioned at the lower part of the connecting sleeve 6, and the constant-resistance block 5 is positioned at the upper part of the connecting sleeve 6.
The working process is as follows: when a landslide occurs, landslide thrust pushes the free section rod body 2, the free section rod body 2 drives the constant resistance block 5 to move through the connecting sleeve 6, the constant resistance block 5 further pushes the rolling shaft 4 to move, the two interact, because the rolling shaft 4 can provide large friction force, when the friction force between the constant resistance block 5 and the rolling shaft 4 is greater than the landslide thrust force, the constant resistance block 5 and the rolling shaft 4 are in a relative static state, when the friction force between the constant resistance block 5 and the rolling shaft 4 is less than the landslide thrust force, the constant resistance block 5 can move a set long distance in the sleeve 3 under the combined action of the rolling shaft 4 and the constant resistance block 5, and the connecting sleeve 6 is extruded to generate transverse elastic deformation, so that the transverse large-deformation shear resistance of the anchor rod is realized.
The invention realizes the constant resistance large deformation concept of the anchor rod and improves the service life of the anchor rod; the shearing resistance of the anchor rod is improved; the constant-resistance block can be effectively controlled to move forwards in the sleeve under the action of the thrust of the landslide, and cannot retreat, so that potential safety hazards are avoided.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (1)
1. An anti-shearing large-deformation anchor rod is characterized by comprising an anchoring section rod body, a free section rod body, a sleeve, a constant resistance block and a connecting sleeve, wherein the constant resistance block and the free section rod body are connected together through the connecting sleeve, the connecting sleeve can generate elastic deformation, the free section rod body is positioned at the lower part of the connecting sleeve, the constant resistance block is positioned at the upper part of the connecting sleeve, the constant resistance block is arranged in the sleeve, the upper end of the sleeve is fixedly connected with the anchoring section rod body, a rolling shaft is arranged in the sleeve, and the rolling shaft can move in the sleeve; the sleeve comprises a top plate and a square tube with openings at two ends, the top plate is arranged above the square tube and is integrally formed with the square tube, the top surface of the top plate is welded with the tail end of the rod body of the anchoring section, and channels are arranged in two side walls of the square tube and are used for the movement of the rolling shaft; the channel comprises a linear channel and a curved channel, the curved channel forms an upward slope along the moving direction of the roller, and the linear channel and the curved channel are arranged in a staggered manner; the rolling shaft comprises a connecting shaft and two rolling shafts, the two rolling shafts are arranged on the outer side of the connecting shaft, the diameter of each rolling shaft is smaller than that of the connecting shaft, the length of the connecting shaft is matched with the distance between the two side walls of the sleeve, the length of each rolling shaft is matched with the thickness of the side wall of the sleeve, the rolling shaft penetrates through the two side walls of the sleeve, the connecting shaft is positioned in the sleeve, and the rolling shafts are positioned on the channel; a nut is sleeved on the outer side of the rolling shaft, the diameter of the nut is larger than that of the rolling shaft, the nut is positioned on the outer side of the side wall, an external thread is arranged on the outer side of the rolling shaft, and the nut is provided with an internal thread matched with the external thread; the constant-resistance block is an irregular cylinder, one side of the constant-resistance block is higher than the other side, and the higher side of the constant-resistance block is provided with a slope and interacts with the rolling shaft; the constant-resistance block comprises a square column and a right-angle trapezoidal column, the square column and the right-angle trapezoidal column are integrally formed, the right-angle trapezoidal column is arranged above one side of the square column, the waist of the right-angle trapezoidal column, the bottom edge of which is in a right angle, is in a straight line with the height of the square column, and the other waist of the right-angle trapezoidal column is connected with the length of the square column; the constant resistance block is made of high-strength alloy materials, the anchoring section rod body is made of twisted steel, the connecting sleeve is a nylon material sleeve, and the surface roughness of the rolling shaft is large.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381256.XA CN108756974B (en) | 2018-04-25 | 2018-04-25 | Anti-shearing large-deformation anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381256.XA CN108756974B (en) | 2018-04-25 | 2018-04-25 | Anti-shearing large-deformation anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108756974A CN108756974A (en) | 2018-11-06 |
| CN108756974B true CN108756974B (en) | 2020-02-14 |
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ID=64011679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810381256.XA Expired - Fee Related CN108756974B (en) | 2018-04-25 | 2018-04-25 | Anti-shearing large-deformation anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108756974B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153393B (en) * | 2021-06-02 | 2022-08-02 | 中国矿业大学 | Self-adaptive anti-shearing large-deformation anchor rod |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4220636A1 (en) * | 1992-06-24 | 1994-01-05 | Ischebeck Friedrich Gmbh | Coupling sleeve for self-tapping injection anchors for flushing medium injection during percussion drilling - includes internal thread and axial abutment for screwed-in injection anchor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201943725U (en) * | 2011-03-15 | 2011-08-24 | 北京科技大学 | Friction sleeve type large-deformation anchor rod |
| CN102562109B (en) * | 2012-01-15 | 2014-01-01 | 山东科技大学 | Resistance-increasing yielding high-deformation anchor rod and processing method thereof |
| CN204060749U (en) * | 2014-08-01 | 2014-12-31 | 中国科学院、水利部成都山地灾害与环境研究所 | A kind of constant resistance and large deformation anchor rod/anchor cable |
| CN105422152B (en) * | 2015-12-28 | 2018-05-08 | 山东科技大学 | A kind of large deformation shear anchor arm and its installation method |
| CN105736025B (en) * | 2016-02-02 | 2019-03-19 | 重庆大学 | A kind of anchor pole that tension is disconnected |
| CN107740702A (en) * | 2017-11-14 | 2018-02-27 | 缪协兴 | A kind of pressure-release anchor cable |
-
2018
- 2018-04-25 CN CN201810381256.XA patent/CN108756974B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4220636A1 (en) * | 1992-06-24 | 1994-01-05 | Ischebeck Friedrich Gmbh | Coupling sleeve for self-tapping injection anchors for flushing medium injection during percussion drilling - includes internal thread and axial abutment for screwed-in injection anchor |
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| Publication number | Publication date |
|---|---|
| CN108756974A (en) | 2018-11-06 |
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Granted publication date: 20200214 Termination date: 20210425 |