CN114382078B - Stress and deformation coordination component among anchor cable bundle steel strands and use method - Google Patents
Stress and deformation coordination component among anchor cable bundle steel strands and use method Download PDFInfo
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- CN114382078B CN114382078B CN202210077194.XA CN202210077194A CN114382078B CN 114382078 B CN114382078 B CN 114382078B CN 202210077194 A CN202210077194 A CN 202210077194A CN 114382078 B CN114382078 B CN 114382078B
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- cylindrical
- anchor ring
- steel strand
- bearing plate
- channel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 94
- 239000010959 steel Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 239000011435 rock Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A stress and deformation coordination member between anchor cable bundle steel strands and a use method thereof comprise a cylindrical anchor ring, a closed bearing plate, an inner anchor ring and a sealing bag; at least two cylindrical channels A parallel to the axial direction of the cylindrical anchor ring are arranged on the cylindrical anchor ring, and the adjacent cylindrical channels A are communicated through a transverse channel arranged on the cylindrical anchor ring; the closed bearing plate is arranged on the bottom surface of the cylindrical anchor ring, and a cylindrical channel B is formed in the closed bearing plate; the sealing bag is arranged in the cylindrical channel A and the transverse channel, the interior of the sealing bag is filled with pressure-bearing fluid, and the sealing bag is provided with a threading hole; an inner anchor ring is arranged at the upper end of the sealing bag in the cylindrical channel A; a clamping piece is arranged between the inner hole of the inner anchor ring and the steel strand; the tensile force of the anchor cable is uniformly distributed to each steel strand through the flow of the pressure-bearing fluid among the cylindrical channels A, so that the stress state of each steel strand is optimized, and the effect of coordination of the stress and deformation of each steel strand is achieved.
Description
Technical Field
The invention relates to the technical field of rock-soil anchoring, in particular to a stress and deformation coordination member among anchor cable beam steel strands and a use method.
Background
The anchor cable reinforcement is used as a common supporting mode, and plays a very important role in the fields of tunnels, slopes and the like. However, the conventional cable has a problem of stress concentration, and in order to overcome the problem to improve the ultimate pullout resistance of the cable, the scholars have developed tension-dispersed cable and pressure-dispersed cable.
The inner anchoring sections of the plurality of groups of steel strands of the stress dispersion type anchor cable are respectively arranged at different depths of the rock body, so that shearing force between the steel strands and surrounding rock is uniformly distributed at the different depths, and grouting stress of the anchoring sections is uniform. However, in a long-term working state, as the lengths of the free sections of the steel strands are different, surrounding rock deformation can cause uneven stress of the steel strands, and the shortest steel strand is larger in stress and easy to damage.
Disclosure of Invention
The invention aims at overcoming the defects, and provides a stress and deformation coordination component among the stress-dispersed anchor cable beam steel strands and a use method thereof, which are used for adjusting the stress state of each steel strand, so that each steel strand is uniformly stressed, and the effect of coordination of the stress and the deformation among the steel strands is achieved.
The invention solves the technical problem by adopting a scheme that the stress and deformation coordination component between the anchor cable bundle steel strands comprises a cylindrical anchor ring, a closed bearing plate, an inner anchor ring and a sealing bag;
at least two cylindrical channels A parallel to the axial direction of the cylindrical anchor ring are arranged on the cylindrical anchor ring, the cylindrical channels A penetrate through the cylindrical anchor ring, and adjacent cylindrical channels A are communicated through transverse channels arranged on the cylindrical anchor ring;
the closed bearing plate is arranged on the bottom surface of the cylindrical anchor ring, cylindrical channels B which are arranged in one-to-one correspondence with the cylindrical channels A are formed in the closed bearing plate, and the cylindrical channels B penetrate through the closed bearing plate;
the sealing bags are arranged in the cylindrical channel A and the transverse channel, the interiors of the sealing bags are filled with pressure-bearing fluid, and the sealing bags are provided with threading holes which are arranged in one-to-one correspondence with the cylindrical channel A;
an inner anchor ring is arranged at the upper end of the sealing bag in the cylindrical channel A, and the sealing bag is nested in a space formed by the cylindrical anchor ring, the closed bearing plate and the inner anchor ring;
the inner hole, the threading hole and the cylindrical channel B of the inner anchor ring at the same cylindrical channel A correspond to each other in the up-down position to form a steel strand reserved hole;
the steel strand penetrates through the steel strand preformed hole, and a clamping piece is arranged between the inner hole of the inner anchor ring and the steel strand.
Further, the transverse channel is formed in the bottom surface of the cylindrical anchor ring.
Further, the shape of the closed bearing plate is disc-shaped, and the cylindrical anchor ring is welded with the closed bearing plate.
Further, the sealing bag comprises annular columnar bags with the shape and the number corresponding to the columnar channels A and fluid channel bags corresponding to the transverse channels.
A method for using stress and deformation coordination components among anchor cable bundle steel strands comprises the following steps:
step one: drilling holes at the designed supporting positions of the rock mass, and anchoring the inner ends of the anchor cable bundles in the drilled holes;
step two: penetrating the steel strands into steel strand reserved holes on the coordination member, wherein the number of the steel strands is consistent with that of the steel strand reserved holes;
step three: the clamping piece is arranged between an inner hole of the inner anchor ring and the steel strand, the steel strand passes through the jack, and prestress is applied to the steel strand to meet the design requirement;
step four: and removing the jack after the prestress tensioning is finished, detecting the displacement coordination condition of each steel strand, and cutting off redundant steel strands and sealing anchors after the detection is qualified to finish the installation.
Furthermore, in the third step, when the prestress is applied, all the steel strands in the anchor cable should be stretched at the same time.
Further, after the installation is completed, when surrounding rock deformation leads to one steel strand of the anchor rope to bear large tension, the inner anchor ring in the cylindrical channel A where the steel strand is positioned is pulled to move towards the direction close to the closed bearing plate, under the action of the force, the inner anchor ring and the closed bearing plate generate relative displacement, pressure-bearing fluid between the inner anchor ring and the closed bearing plate is extruded to the adjacent cylindrical channel A, correspondingly, the inner anchor ring of the adjacent cylindrical channel A is pushed towards the direction far away from the closed bearing plate, the steel strand of the adjacent cylindrical channel A is under the thrust of the inner anchor ring in a tight state, and the coordination of the stress and the deformation of the steel strand in the adjacent two cylindrical channels A is realized.
Compared with the prior art, the invention has the following beneficial effects: the structure is simple, the design is reasonable, pressure-bearing fluid is arranged in the pressure-bearing fluid, the tension force of the anchor cable is uniformly distributed to each steel strand through the flow of the pressure-bearing fluid among the cylindrical channels A, the stress state of each steel strand is optimized, and the effect of coordination of the stress and deformation of each steel strand is achieved.
Drawings
The patent of the invention is further described below with reference to the accompanying drawings.
Fig. 1 is a cross-sectional view of the present conformable member.
Fig. 2 is a schematic structural view of a cylindrical anchor ring.
Fig. 3 is a schematic structural view of the closed bearing plate.
Fig. 4 is a schematic structural view of the seal capsule.
Fig. 5 is a schematic structural view of the present coordination member.
In the figure: the device comprises a 1-clamping piece, a 2-cylindrical anchor ring, a 3-closed bearing plate, a 4-inner anchor ring, a 5-sealing bag, a 6-pressure fluid, a 7-cylindrical channel A, an 8-cylindrical channel B and a 9-transverse channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1-5, an anchor cable bundle steel strand inter-strand stress and deformation coordination member comprises a cylindrical anchor ring 2, a closed bearing plate 3, an inner anchor ring 4 and a sealing bag 5;
at least two cylindrical channels A7 parallel to the axial direction of the cylindrical anchor ring are arranged on the cylindrical anchor ring, the cylindrical channels A penetrate through the cylindrical anchor ring, and adjacent cylindrical channels A are communicated through a transverse channel 9 arranged on the cylindrical anchor ring;
the closed bearing plate is arranged on the bottom surface of the cylindrical anchor ring, cylindrical channels B8 which are arranged in one-to-one correspondence with the cylindrical channels A are formed in the closed bearing plate, the cylindrical channels B penetrate through the closed bearing plate, when the anchor cable is arranged, the steel strands penetrate through the cylindrical channels B, and the diameter of the cylindrical channels B is matched with the outer diameter of the steel strands;
the sealing bag is arranged in the cylindrical channel A and the transverse channel, the interior of the sealing bag is filled with pressure-bearing fluid 6, and threading holes which are arranged in one-to-one correspondence with the cylindrical channel A are formed in the sealing bag;
an inner anchor ring is arranged at the upper end of the sealing bag in the cylindrical channel A, the inner anchor ring is similar to the anchor ring of a single anchor cable, and the outer diameter of the inner anchor ring is matched with the diameter of the cylindrical channel A; the sealing bag is nested in a space formed by the cylindrical anchor ring, the closed bearing plate and the inner anchor ring;
the inner hole, the threading hole and the cylindrical channel B of the inner anchor ring at the same cylindrical channel A correspond to each other in the up-down position to form a steel strand reserved hole;
the steel strand penetrates through the steel strand preformed hole, a clamping piece 1 is arranged between the inner hole of the inner anchor ring and the steel strand, and when the anchor cable is installed, the inner anchor ring is arranged in the cylindrical channel A, and the steel strand penetrates through the inner hole of the inner anchor ring; when the steel strand is subjected to tensile force, the inner anchor ring and the clamping piece act together to generate clamping force to fix the steel strand.
In this embodiment, the transverse channel is formed in the bottom surface of the cylindrical anchor ring.
In this embodiment, the shape of the closed bearing plate is disc-shaped, the cylindrical anchor ring is welded with the closed bearing plate, and the sealing bag is firstly assembled into the cylindrical anchor ring and then welded.
In this embodiment, the sealing bag includes annular columnar bags with shapes and numbers corresponding to the columnar channels a, and fluid channel bags corresponding to the transverse channels, so that the sealing bag has good elastic deformation performance; the outer diameter of the annular columnar bag body is matched with the inner diameter of the columnar channel A, and the inner diameter of the threading hole is matched with the outer diameter of the steel strand; the sealing bladder is used for containing the pressure-bearing fluid and preventing the pressure-bearing fluid from leaking to the outside when the sealing bladder is pressurized.
In this embodiment, the cylindrical anchor ring is made by drilling holes in a cylindrical steel member.
A method for using stress and deformation coordination components among anchor cable bundle steel strands comprises the following steps:
step one: drilling holes at the designed supporting positions of the rock mass, and anchoring the inner ends of the anchor cable bundles in the drilled holes;
step two: penetrating the steel strands into steel strand reserved holes on the coordination member, wherein the number of the steel strands is consistent with that of the steel strand reserved holes;
step three: the clamping piece is arranged between an inner hole of the inner anchor ring and the steel strand, the steel strand passes through the jack, and prestress is applied to the steel strand to meet the design requirement;
step four: and removing the jack after the prestress tensioning is finished, detecting the displacement coordination condition of each steel strand, and cutting off redundant steel strands and sealing anchors after the detection is qualified to finish the installation.
In the third step, when the prestress is applied, all the steel strands in the anchor cable should be stretched at the same time; when the existing stress dispersion type anchor cable is tensioned, the tensioning displacement of different steel strands is the same, so that the stress state of the steel strands is different, the prestress of the anchor cable is inconvenient to adjust, and the pressure-bearing fluid is arranged in the coordination member, so that the steel strands are in the same stress state, and the construction is more convenient.
Under the long-term working state of the existing force-dispersion type anchor cable, surrounding rock deformation causes uneven stress of each steel strand, the strength of the anchor cable cannot be fully utilized, and the anchor cable is easy to damage.
After the installation of the coordination member is completed, when surrounding rock deformation causes that one steel strand of the anchor cable is subjected to larger tension, the inner anchor ring in the cylindrical channel A where the steel strand is positioned is pulled to move towards the direction close to the closed bearing plate, under the action of the force, the inner anchor ring and the closed bearing plate generate relative displacement, pressure-bearing fluid between the inner anchor ring and the closed bearing plate is extruded to the adjacent cylindrical channel A, correspondingly, the inner anchor ring of the adjacent cylindrical channel A is pushed to the direction far away from the closed bearing plate, the steel strand of the adjacent cylindrical channel A is subjected to the thrust of the inner anchor ring to be in a tight state, and the coordination of the stress and the deformation of the steel strands in the adjacent two cylindrical channels A is realized.
The stress and deformation of the steel strands cannot be adjusted by the traditional anchorage device, the coordination component is internally provided with pressure-bearing fluid, and the tension force of the anchor cable is uniformly distributed to each steel strand through the flow of the pressure-bearing fluid among the cylindrical channels A, so that the stress state of each steel strand is optimized, and the effect of coordinating the stress and the deformation of each steel strand is achieved.
If this patent discloses or relates to components or structures that are fixedly connected to each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In the description of this patent, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the patent, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the patent.
While the foregoing is directed to the preferred embodiment, other and further embodiments of the invention will be apparent to those skilled in the art from the following description, wherein the invention is described, by way of illustration and example only, and it is intended that the invention not be limited to the specific embodiments illustrated and described, but that the invention is to be limited to the specific embodiments illustrated and described.
Claims (6)
1. An anchor cable bundle steel strand inter-strand stress and deformation coordination member, characterized in that: comprises a cylindrical anchor ring, a closed bearing plate, an inner anchor ring and a sealing bag;
at least two cylindrical channels A parallel to the axial direction of the cylindrical anchor ring are arranged on the cylindrical anchor ring, the cylindrical channels A penetrate through the cylindrical anchor ring, and adjacent cylindrical channels A are communicated through transverse channels arranged on the cylindrical anchor ring;
the closed bearing plate is arranged on the bottom surface of the cylindrical anchor ring, cylindrical channels B which are arranged in one-to-one correspondence with the cylindrical channels A are formed in the closed bearing plate, and the cylindrical channels B penetrate through the closed bearing plate;
the sealing bags are arranged in the cylindrical channel A and the transverse channel, the interiors of the sealing bags are filled with pressure-bearing fluid, and the sealing bags are provided with threading holes which are arranged in one-to-one correspondence with the cylindrical channel A;
an inner anchor ring is arranged at the upper end of the sealing bag in the cylindrical channel A, and the sealing bag is nested in a space formed by the cylindrical anchor ring, the closed bearing plate and the inner anchor ring;
the inner hole, the threading hole and the cylindrical channel B of the inner anchor ring at the same cylindrical channel A correspond to each other in the up-down position to form a steel strand reserved hole;
the steel strand penetrates through the steel strand preformed hole, and a clamping piece is arranged between the inner hole of the inner anchor ring and the steel strand; the sealing bag comprises annular columnar bags with the shape and the number corresponding to the columnar channels A and fluid channel bags corresponding to the transverse channels.
2. The tendon-strand stress and strain coordination member of claim 1, wherein: the transverse channel is formed in the bottom surface of the cylindrical anchor ring.
3. The tendon-strand stress and strain coordination member of claim 1, wherein: the shape of the closed bearing plate is disc-shaped, and the cylindrical anchor ring is welded with the closed bearing plate.
4. A method of using the tendon-strand stress and strain coordination member of claim 1, comprising the steps of:
step one: drilling holes at the designed supporting positions of the rock mass, and anchoring the inner ends of the anchor cable bundles in the drilled holes;
step two: penetrating the steel strands into steel strand reserved holes on the coordination member, wherein the number of the steel strands is consistent with that of the steel strand reserved holes;
step three: the clamping piece is arranged between an inner hole of the inner anchor ring and the steel strand, the steel strand passes through the jack, and prestress is applied to the steel strand to meet the design requirement;
step four: and removing the jack after the prestress tensioning is finished, detecting the displacement coordination condition of each steel strand, and cutting off redundant steel strands and sealing anchors after the detection is qualified to finish the installation.
5. The method of using the tendon-strand stress and strain coordination member of claim 4, wherein: in the third step, when the prestress is applied, all the steel strands in the anchor cable should be stretched at the same time.
6. The method of using the tendon-strand stress and strain coordination member of claim 4, wherein: after the installation is completed, when one steel strand of the anchor cable is subjected to larger tension due to surrounding rock deformation, the inner anchor ring in the cylindrical channel A where the steel strand is positioned is pulled to move towards the direction close to the closed bearing plate, under the action of the force, the inner anchor ring and the closed bearing plate generate relative displacement, pressure-bearing fluid between the inner anchor ring and the inner anchor ring is extruded to the adjacent cylindrical channel A, correspondingly, the inner anchor ring of the adjacent cylindrical channel A is pushed to the direction far away from the closed bearing plate, the steel strand of the adjacent cylindrical channel A is subjected to the thrust of the inner anchor ring to be in a tight state, and the stress and the deformation coordination of the steel strands in the adjacent two cylindrical channels A are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210077194.XA CN114382078B (en) | 2022-01-24 | 2022-01-24 | Stress and deformation coordination component among anchor cable bundle steel strands and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210077194.XA CN114382078B (en) | 2022-01-24 | 2022-01-24 | Stress and deformation coordination component among anchor cable bundle steel strands and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114382078A CN114382078A (en) | 2022-04-22 |
| CN114382078B true CN114382078B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210077194.XA Active CN114382078B (en) | 2022-01-24 | 2022-01-24 | Stress and deformation coordination component among anchor cable bundle steel strands and use method |
Country Status (1)
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| CN (1) | CN114382078B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009127283A (en) * | 2007-11-22 | 2009-06-11 | Jsd:Kk | Method of anchoring plurality of prestressing steel strands by after-bond method, and tool for use therein |
| CN103758125A (en) * | 2014-01-21 | 2014-04-30 | 龚金京 | Squeezing lock head spring bearing plate stress dispersing type large-tonnage expanding head anchor cable |
| WO2015127959A1 (en) * | 2014-02-25 | 2015-09-03 | Vsl International Ag | Removable anchor |
| CN108071112A (en) * | 2016-11-17 | 2018-05-25 | 中铁西北科学研究院有限公司深圳南方分院 | The safeguard structure and its means of defence of anchorage cable anchoring section |
| CN108756970A (en) * | 2018-07-12 | 2018-11-06 | 安徽理工大学 | A kind of hollow grouting cable anchor of segmented and application method |
| CN111139824A (en) * | 2020-01-16 | 2020-05-12 | 华侨大学 | Device for anchor rod prestress nondestructive tensioning and tensioning method thereof |
| CN112160778A (en) * | 2020-09-23 | 2021-01-01 | 中铁第四勘察设计院集团有限公司 | Tunnel side wall anchor rod hole grouting exhaust and pressure stabilizing device and construction method |
| CN112962594A (en) * | 2021-02-22 | 2021-06-15 | 大连理工大学 | Construction method of environment-friendly tension-compression composite dispersed anchor rod |
| US11187081B1 (en) * | 2020-06-22 | 2021-11-30 | Liaoning University | Self-anchored opposite-pulling anti-impact anchor cable for sectional coal pillars and using method thereof |
| CN217150213U (en) * | 2022-01-24 | 2022-08-09 | 福州大学 | Stress and deformation coordination component between stress dispersion type anchor cable and steel strands |
-
2022
- 2022-01-24 CN CN202210077194.XA patent/CN114382078B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009127283A (en) * | 2007-11-22 | 2009-06-11 | Jsd:Kk | Method of anchoring plurality of prestressing steel strands by after-bond method, and tool for use therein |
| CN103758125A (en) * | 2014-01-21 | 2014-04-30 | 龚金京 | Squeezing lock head spring bearing plate stress dispersing type large-tonnage expanding head anchor cable |
| WO2015127959A1 (en) * | 2014-02-25 | 2015-09-03 | Vsl International Ag | Removable anchor |
| CN108071112A (en) * | 2016-11-17 | 2018-05-25 | 中铁西北科学研究院有限公司深圳南方分院 | The safeguard structure and its means of defence of anchorage cable anchoring section |
| CN108756970A (en) * | 2018-07-12 | 2018-11-06 | 安徽理工大学 | A kind of hollow grouting cable anchor of segmented and application method |
| CN111139824A (en) * | 2020-01-16 | 2020-05-12 | 华侨大学 | Device for anchor rod prestress nondestructive tensioning and tensioning method thereof |
| US11187081B1 (en) * | 2020-06-22 | 2021-11-30 | Liaoning University | Self-anchored opposite-pulling anti-impact anchor cable for sectional coal pillars and using method thereof |
| CN112160778A (en) * | 2020-09-23 | 2021-01-01 | 中铁第四勘察设计院集团有限公司 | Tunnel side wall anchor rod hole grouting exhaust and pressure stabilizing device and construction method |
| CN112962594A (en) * | 2021-02-22 | 2021-06-15 | 大连理工大学 | Construction method of environment-friendly tension-compression composite dispersed anchor rod |
| CN217150213U (en) * | 2022-01-24 | 2022-08-09 | 福州大学 | Stress and deformation coordination component between stress dispersion type anchor cable and steel strands |
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| Publication number | Publication date |
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| CN114382078A (en) | 2022-04-22 |
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