CN111706376B - Assembled anchor rod - Google Patents
Assembled anchor rod Download PDFInfo
- Publication number
- CN111706376B CN111706376B CN202010761766.7A CN202010761766A CN111706376B CN 111706376 B CN111706376 B CN 111706376B CN 202010761766 A CN202010761766 A CN 202010761766A CN 111706376 B CN111706376 B CN 111706376B
- Authority
- CN
- China
- Prior art keywords
- rod
- driving rod
- driving
- additional
- ring
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 abstract description 26
- 239000011435 rock Substances 0.000 abstract description 8
- 238000005553 drilling Methods 0.000 description 20
- 238000010276 construction Methods 0.000 description 15
- 238000004873 anchoring Methods 0.000 description 8
- 238000002513 implantation Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
Classifications
-
- 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
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- 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
- E21D21/0093—Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an assembled anchor rod, which is used for solving the technical problem that some assembled anchor rods in the prior art are often broken at an anchor rod splicing part in the process of driving rock strata, and comprises a coaxial driving rod and an additional rod, wherein one end of the driving rod is internally provided with a threaded hole coaxial with the driving rod, the additional rod is a screw rod, one end of the additional rod is in threaded connection with the threaded hole, a connecting ring is fixedly sleeved on the additional rod so as to be used for synchronously moving along with the screwing of the additional rod and abutting against the end part of the driving rod, and a lantern ring is sleeved on the periphery of the driving rod in a sliding manner so as to be used for being sleeved on the periphery of the abutting part of the driving rod and the connecting ring in a sliding manner along with the driving of an advancing ruler of the driving rod.
Description
Technical Field
The invention relates to the technical field of anchor rod production, in particular to an assembled anchor rod which can be assembled quickly and can ensure the use strength of assembled connection.
Background
With the vigorous development of the foundation construction of China, public transportation facilities tend to be sound, wherein the intensive construction of roads tightly connects different geographic areas of China into a whole, the increase of road construction mileage strengthens the humane communication among different areas, and plays an irreplaceable role for prosperity of China.
In road construction, especially in the geographical position of mountain more, the construction unit often need set up the tunnel in the mountain to link up the road, tunnel construction process is complicated, along with the development of science and technology, equipment such as shield machine has started to put into use, thereby can shorten the engineering time, but also has to adopt the manual work to cooperate the construction mode of machinery excavation, and the tunnel needs to carry out the preliminary bracing to the tunnel inner wall in time at the in-process of excavation, and the mode of preliminary bracing often adopts the mode of shoring stock and shotcrete to support.
The function of driving the stock is that can be in the same place with the tunnel face empty inner wall firmly with the stratum outside the tunnel to prevent rock, the rock piece on the tunnel inner wall and drop, prevent tunnel inner wall unstability, thereby guarantee tunnel inner wall's stability.
Along with the construction needs, longer-sized anchor rods are gradually applied, and the application demands are more and more, the existing anchor rods with longer sizes are formed integrally, but due to longer anchor rods, the anchor rods are quite inconvenient in the carrying and transferring processes, certain resistance is brought to construction, some anchor rods which can be assembled are also present in the existing market, but some assembled anchor rods are poor in assembling quality, and fracture phenomenon is often generated at the joint of the anchor rods in the operation process of driving into rock stratum.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an assembled anchor rod which is used for solving the technical problem that some assembled anchor rods in the prior art are often broken at the joint of the anchor rods in the process of driving into rock strata.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the assembled anchor rod comprises a coaxial driving rod and an additional rod, wherein one end of the driving rod is internally provided with a threaded hole coaxial with the driving rod, the additional rod is a screw rod, one end of the additional rod is in threaded connection with the threaded hole, a connecting ring is fixedly sleeved on the additional rod, the additional rod is used for moving synchronously along with the screwing of the additional rod and abutting against the end part of the driving rod, and a lantern ring is sleeved on the periphery of the driving rod in a sliding manner, so that the driving rod is driven along with the ruler of the driving rod, and the periphery of the abutting part of the driving rod and the connecting ring is sleeved in a sliding manner.
The working principle is that the driving rod and the additional rod are transported to a construction site in batches, and then the driving rod and the additional rod are assembled on site;
the concrete assembly process is that the extension rod is screwed into the threaded hole, the connection ring moves synchronously with the extension rod along with the screw-in pushing of the extension rod, and when the extension rod is screwed in place, the connection ring is abutted with the end part of the driving rod at the moment, and the assembly process is completed at the moment.
And then drilling holes in the inner wall of the tunnel, and drilling holes with the diameter of the driving rod by adopting the position and the drilling angle set by construction equipment on the inner wall of the tunnel according to the designed driving position and the driving angle of the anchor rod.
Then will squeeze into the pole and add the pole after will assembling and regard as an whole to insert in the drilling, will at first squeeze into the pole and aim at the drilling, then insert into to the drilling and squeeze into the pole, along with the continuation of squeezing into the pole, this in-process the lantern ring can touch the lateral wall of drilling, just like this with construction tool to add the pole tip and beat to make the lantern ring get into in the drilling with the mode that forms the extrusion to the drilling lateral wall, the lateral wall of drilling can just at this moment produce a thrust to the lantern ring, this thrust will push the lantern ring along the axis of squeezing into the pole towards the direction of go on sliding of go on the go up the lantern ring, with strikeeing to the jack-in to add the pole, the lantern ring finally slides to squeeze into the peripheral of pole and go up between the pole butt, this process has guaranteed the equipment intensity of squeezing into between pole and the pole.
In the whole implantation process of the structure, firstly, the lantern ring is inserted into the drill hole, and can extrude the inner wall of the drill hole, so that the structure can be fully filled in the drill hole, and the anchoring effect of the anchor rod is guaranteed, in addition, in the process, as the lantern ring advances, the lantern ring slides to the periphery of the abutting part of the driving rod and the connecting ring under the thrust of the side wall of the drill hole, so that the assembly strength between the driving rod and the additional rod is guaranteed in the whole implantation process of the structure, and then materials such as an anchoring agent are filled in a gap between the structure and the drill hole.
The beneficial effects of the invention are as follows:
The invention uses the driving rod and the additional rod to slidingly arrange the lantern ring on the driving rod, the additional rod is fixedly sleeved with the connecting ring, when the invention is assembled, the additional rod is only required to be screwed into the threaded hole, and the assembly mode is convenient and quick.
In the whole implantation process of the structure, firstly, the lantern ring is inserted into the drill hole, and can extrude the inner wall of the drill hole, so that the structure can be fully filled in the drill hole, and the anchoring effect of the anchor rod is guaranteed, in addition, in the process, as the lantern ring advances, the lantern ring slides to the periphery of the abutting part of the driving rod and the connecting ring under the thrust of the side wall of the drill hole, so that the assembly strength between the driving rod and the additional rod is guaranteed in the whole implantation process of the structure, and then materials such as an anchoring agent are filled in a gap between the structure and the drill hole.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
The reference numerals indicate a driving rod 1, an additional rod 2, a threaded hole 3, a connecting ring 4, a lantern ring 5, a convex ring 6, a ring groove 7, a backing plate 8, a bulge 9, a sliding chute 10 and a sliding block 11.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the assembled anchor rod comprises a coaxial driving rod 1 and an additional rod 2, wherein one end of the driving rod 1 is internally provided with a threaded hole 3 coaxial with the driving rod 1, the additional rod 2 is a screw rod, one end of the additional rod is in threaded connection with the threaded hole 3, a connecting ring 4 is fixedly sleeved on the additional rod 2, so that the additional rod 2 can move synchronously along with screwing in and is abutted with the end part of the driving rod 1, and a lantern ring 5 is sleeved on the periphery of the driving rod 1 in a sliding manner, so that the circumference of the abutting part of the driving rod 1 and the connecting ring 4 is sleeved in a sliding manner along with the driving of a ruler of the driving rod 1.
As shown in fig. 1, in the whole implantation process of the structure of the invention, firstly, as the collar 5 is inserted into the drill hole, the collar 5 can squeeze the inner wall of the drill hole, so that the structure of the invention can be fully filled in the drill hole, thereby ensuring that the structure of the invention fully plays a role in anchoring an anchor rod, in addition, as the collar 5 advances, the collar 5 slides to the peripheral periphery of the abutting part of the driving rod 1 and the connecting ring 4 under the thrust of the side wall of the drill hole, thereby ensuring the assembly strength between the driving rod 1 and the extension rod 2 in the whole implantation process of the invention, and then, materials such as an anchoring agent are filled in a gap between the structure of the invention and the drill hole.
As shown in fig. 1, a convex ring 6 coaxial with the connecting ring 4 is fixed at the end of the connecting ring 4, a ring groove 7 coaxial with the driving rod 1 is opened at the end of the driving rod 1, the convex ring 6 is clamped in the ring groove 7, and the convex ring 6 can be clamped in the ring groove 7 in the process of screwing in the adding rod 2, so that the connection between the adding rod 2 and the driving rod 1 can be further enhanced, and the driving rod 1, the adding rod 2 and the connecting ring 4 form a firm whole. The convex ring 6 is integrally formed with the connecting ring 4 in such a way as to ensure the overall strength of the connecting ring 4 and the convex ring 6 as a whole.
As shown in fig. 1, the other end of the driving rod 1 is a tapered tip, the end of the driving rod 1 corresponds to a drilling position in a tunnel, and then an external force is applied to the other end of the extension rod 2, so that the end of the driving rod 1 with the tapered tip enters the drilling hole, and the structure of the invention needs to be hit later, thereby assisting the invention to enter the drilling hole, at this time, the end of the driving rod 1 is set to be a tip structure, and the end of the driving rod 1 can be driven into a rock stratum at the bottom of the drilling hole more smoothly, thereby thoroughly ensuring that the structure of the invention is implanted in place. The other end of the extension rod 2 is fixed with a base plate 8, and the base plate 8 is applied, so that an operation condition which is more convenient for the application operation is provided for an operator. The base plate 8 is provided with a plurality of bulges 9 outwards on the surface thereof, and the bulges 9 are arranged, so that the slipping phenomenon of a drilling tool on the base plate 8 in the process of drilling the base plate 8 is mainly prevented, the personal safety of operators is guaranteed, the structure of the drilling machine is quickly implanted into a drilled hole, and the working efficiency is improved.
As shown in fig. 1, the driving rod 1 is provided with a chute 10, a slide block 11 is arranged in the chute 10, the slide block 11 is fixedly connected with the inner wall of the lantern ring 5, and the manner of arranging the lantern ring 5 in a sliding manner is simpler, thereby being beneficial to saving materials and reducing manufacturing cost. The collar 5 is located at an end far from the backing plate 8 and forms a conical inclined plane between the outer wall of the collar 5 and the inner wall of the collar 5, i.e. the end of the collar 5 far from the backing plate 8 is provided with a conical inclined plane, which extends from the outer wall of the collar 5 to the inner wall of the collar 5, when the collar 5 starts to enter the borehole, the end of the collar 5 far from the backing plate 8 firstly enters the borehole and forms extrusion on the side wall of the borehole, so that the end of the collar 5 is provided with the conical inclined plane, and the form can reduce the rock entering resistance when the collar 5 enters the borehole, thereby further reducing the rock entering resistance of the invention.
The working principle is that the driving rod 1 and the additional rod 2 are transported to a construction site in batches, and then the driving rod 1 and the additional rod 2 are assembled on site;
the specific assembly process is that the extension rod 2 is screwed into the threaded hole 3, the connection ring 4 moves synchronously with the extension rod 2 along with the screwing-in pushing of the extension rod 2, and when the extension rod 2 is screwed in place, the connection ring 4 is abutted with the end part of the driving rod 1 at the moment, and the assembly process is completed at the moment.
And then drilling holes in the inner wall of the tunnel, and drilling holes with the diameter of the driving rod 1 by adopting the position and the drilling angle set by construction equipment on the inner wall of the tunnel according to the designed driving position and the driving angle of the anchor rod.
Then the assembled driving rod 1 and the additional rod 2 are inserted into a drill hole as a whole, the driving rod 1 is aligned with the drill hole, then the driving rod 1 is inserted into the drill hole, the collar 5 touches the side wall of the drill hole in the process along with the continuous insertion of the driving rod 1, at the moment, the backing plate 8 at the end part of the additional rod 2 is beaten by a construction tool, so that the collar 5 enters the drill hole in a manner of extruding the side wall of the drill hole, the side wall of the drilled hole can generate a thrust to the collar 5, the thrust pushes the collar 5 to slide along the axis of the driving rod 1 towards the direction of the connecting ring 4, the collar 5 finally slides to the periphery of the abutting part of the driving rod 1 and the connecting ring 4 along with the continuous impact jacking of the extension rod 2, and the process ensures the assembly strength between the driving rod 1 and the extension rod 2.
In the whole implantation process of the structure, firstly, as the lantern ring 5 is inserted into the drill hole, the lantern ring 5 can extrude the inner wall of the drill hole, so that the structure can be fully filled in the drill hole, and the anchoring effect of the anchor rod is guaranteed, in addition, as the lantern ring 5 advances, the lantern ring 5 slides to the circumferential periphery of the abutting part of the driving rod 1 and the connecting ring 4 under the thrust of the side wall of the drill hole, so that the assembly strength between the driving rod 1 and the extension rod 2 is guaranteed in the whole implantation process of the structure, and then materials such as an anchoring agent are filled in a gap between the structure and the drill hole.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (6)
1. The assembled anchor rod is characterized by comprising a coaxial driving rod (1) and an additional rod (2), wherein one end of the driving rod (1) is internally provided with a threaded hole (3) coaxial with the driving rod (1), the other end of the driving rod (1) is a conical tip, the additional rod (2) is a screw rod, one end of the additional rod is in threaded connection with the threaded hole (3), a connecting ring (4) is fixedly sleeved on the additional rod (2) so as to synchronously move along with the screwing of the additional rod (2) and abut against the end of the driving rod (1), the periphery of the driving rod (1) is sleeved with a sleeve ring (5) in a sliding manner along with the driving of a ruler of the driving rod (1), a sliding groove (10) is formed in the driving rod (1), and a sliding block (11) is arranged in the sliding groove (10) and fixedly connected with the inner wall of the sleeve ring (5).
2. The assembled anchor rod as claimed in claim 1, wherein the end part of the connecting ring (4) is fixed with a convex ring (6) coaxial with the connecting ring (4), the end part of the driving rod (1) is provided with a ring groove (7) coaxial with the driving rod (1), and the convex ring (6) is clamped in the ring groove (7).
3. An assembled bolt according to claim 2, characterized in that the collar (6) is integrally formed with the connecting ring (4).
4. An assembled anchor rod according to claim 1, wherein the other end of the extension rod (2) is fixed with a backing plate (8).
5. An assembled anchor rod according to claim 4, wherein the backing plate (8) is provided with a plurality of protrusions (9) facing outwards.
6. An assembled bolt according to claim 4, wherein the collar (5) is provided with a tapered ramp at the end remote from the backing plate (8), the tapered ramp extending from the outer wall of the collar (5) to the inner wall of the collar (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010761766.7A CN111706376B (en) | 2020-07-31 | 2020-07-31 | Assembled anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010761766.7A CN111706376B (en) | 2020-07-31 | 2020-07-31 | Assembled anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111706376A CN111706376A (en) | 2020-09-25 |
| CN111706376B true CN111706376B (en) | 2025-03-14 |
Family
ID=72546948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010761766.7A Active CN111706376B (en) | 2020-07-31 | 2020-07-31 | Assembled anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111706376B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691907A (en) * | 2020-07-31 | 2020-09-22 | 中建隧道建设有限公司 | Anchor rod for tunnel support |
| CN212272262U (en) * | 2020-07-31 | 2021-01-01 | 中建隧道建设有限公司 | An assembled anchor |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1170762A (en) * | 1966-02-25 | 1969-11-19 | Avdel Ltd | Masonry anchor |
| DE3902727A1 (en) * | 1989-01-31 | 1990-08-02 | Willich F Gmbh & Co | Glass-fibre-reinforced, resin-bedded roof bolt |
| DE4445626A1 (en) * | 1994-12-21 | 1996-06-27 | Willich F Berg Bautechnik | Drill anchor for underground mining and tunnelling |
| FR2742177B1 (en) * | 1995-12-06 | 1998-02-06 | Spie Fondations | CONNECTION DEVICE FOR FOUNDATION DRILLING ELEMENTS AND SYSTEM PROVIDED WITH SUCH DEVICE |
| JP3851590B2 (en) * | 2002-05-23 | 2006-11-29 | エスティーエンジニアリング株式会社 | Preceding ground mountain consolidation method using self-drilling bolt and FRP bolt |
| AU2008235258A1 (en) * | 2007-04-05 | 2008-10-16 | Peter Andrew Gray | Extendable member |
| EP2275642A1 (en) * | 2009-07-17 | 2011-01-19 | Agisco S.r.l. | System for detection and monitoring of deep land subsidence |
| DE102010016484A1 (en) * | 2009-08-20 | 2011-02-24 | Friedr. Ischebeck Gmbh | Coupling for connecting anchor rods |
| US8157021B2 (en) * | 2009-11-29 | 2012-04-17 | Chen Bo-Shen | Chisel adapter |
| CN204267057U (en) * | 2014-10-30 | 2015-04-15 | 山东科技大学 | A kind of nested type pipe seam anchor bar |
| CN104674808B (en) * | 2015-02-28 | 2017-04-26 | 安徽理工大学 | Construction method of assembly type hollow grouting anchor bolt |
| CN204754796U (en) * | 2015-03-23 | 2015-11-11 | 河南理工大学 | Roadway support is high -speed joint formula drilling rod for anchor |
| CN109057841A (en) * | 2018-08-30 | 2018-12-21 | 沈阳建筑大学 | Segmented Friction Anchor |
| CN109630174B (en) * | 2018-12-08 | 2021-11-16 | 卓中朝 | Subway tunnel safety construction device and construction method |
| CN109882225B (en) * | 2019-04-04 | 2024-01-23 | 河南理工大学 | Extendable repeated grouting pipe and double-circle repeated grouting anchor rod |
| CN110185484B (en) * | 2019-05-08 | 2024-08-20 | 中建隧道建设有限公司 | Combined anchor rod device for quickly controlling deformation of surrounding rock of tunnel and construction method |
| CN210564600U (en) * | 2019-09-06 | 2020-05-19 | 安徽省建筑工程质量第二监督检测站 | Anchor rod connecting device |
| CN110925003B (en) * | 2019-12-10 | 2021-02-23 | 华北水利水电大学 | A multi-level stress and displacement control extensible bolt and multifunctional intelligent monitoring device |
-
2020
- 2020-07-31 CN CN202010761766.7A patent/CN111706376B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691907A (en) * | 2020-07-31 | 2020-09-22 | 中建隧道建设有限公司 | Anchor rod for tunnel support |
| CN212272262U (en) * | 2020-07-31 | 2021-01-01 | 中建隧道建设有限公司 | An assembled anchor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111706376A (en) | 2020-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2017301079B2 (en) | Supporting Method of An Extensible Reaming Self-Anchoring Anchor Rod | |
| CN100497887C (en) | Bush bulging shell type self-drilling hollow anchor rod | |
| CA2994061C (en) | Supporting method of an extensible reaming self-anchoring anchor rod | |
| WO2014086297A1 (en) | Resin cartridge filling method for roadway roof bolt drill hole | |
| CN101173517A (en) | Pile-pulling construction method | |
| CN105822234A (en) | Drill rod assembly with drillable expanded bit for piling machine | |
| CN103321222B (en) | Recoverable type anchor rod, pressure-bearing plate type anchor pile and anchoring method | |
| CN110295849A (en) | Weathering crushed zone bored grouting method and drilling sub-assembly in shallow rock | |
| CN111706376B (en) | Assembled anchor rod | |
| CN110529047A (en) | A kind of self-advancing type pipe canopy drilling tool excavated for tunnel soft rock | |
| CN212272262U (en) | An assembled anchor | |
| CN214273689U (en) | Tunnel in-situ expansion of prestressed anchor cable tension structure | |
| CN2905900Y (en) | Self-propelled grouting anchoring-bolt | |
| CN217974351U (en) | Self-drilling type prestressed anchor rod | |
| CN103410529A (en) | Tunnel supporting arch foot reinforced structure for soft surrounding rocks and construction method | |
| CN103306280A (en) | Stirring anchor pile implanted in inner hole of drill rod and anchoring method | |
| CN207879258U (en) | A kind of anchor pole pipe-following drilling Counterboring apparatus | |
| CN203361147U (en) | Recyclable anchor rod and bearing plate type anchor pile | |
| CN210530749U (en) | Self-advancing pipe shed drilling tool for tunnel soft rock excavation | |
| RU63409U1 (en) | DEVICE FOR FORMING GROUND-CEMENT BODIES | |
| CN116378712A (en) | Roof fall-off prevention grouting pipe and application method | |
| CN204511327U (en) | The anti-eccentric drill bit structure of tunnel anchoring boring | |
| CN103967025A (en) | Manually excavated hole broadening method and manually excavated hole broadening stabilization structure | |
| CN219932213U (en) | Anchor rod for exploration tunnel support | |
| CN112983519A (en) | High-pretightening-force anchor rod for actively and quickly realizing three-dimensional stress balance and anchoring method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |