CN117738708A - Hole-cleaning anchor rod with built-in anchoring agent and installation method thereof - Google Patents
Hole-cleaning anchor rod with built-in anchoring agent and installation method thereof Download PDFInfo
- Publication number
- CN117738708A CN117738708A CN202311737376.6A CN202311737376A CN117738708A CN 117738708 A CN117738708 A CN 117738708A CN 202311737376 A CN202311737376 A CN 202311737376A CN 117738708 A CN117738708 A CN 117738708A
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- Prior art keywords
- anchor
- rod
- rod body
- hole
- anchoring
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- 238000004873 anchoring Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004140 cleaning Methods 0.000 title claims description 9
- 238000009434 installation Methods 0.000 title abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 37
- 239000011440 grout Substances 0.000 claims description 18
- 239000011435 rock Substances 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011083 cement mortar Substances 0.000 claims description 8
- 239000004575 stone Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a hole-clearing anchor rod with built-in anchoring agent and an installation method thereof. The end of the hollow rod body is welded with the plug, the rod body can be limited to retract in the drilling stage, and the plug and the connecting nut form self-locking, so that the rod body of the anchoring section and the hollow rod body are driven to rotate together, and meanwhile, the plug can also effectively prevent damaged anchoring agent from flowing back into the inner cavity of the rod body of the anchoring section; according to the invention, the end of the connecting nut is additionally provided with the section of guide cylinder, so that the posture of the anchoring section rod body can be effectively righted, and the anchoring section rod body and the hollow rod body are coaxial.
Description
Technical Field
The invention relates to a built-in anchoring agent anchor rod capable of clearing holes and an installation method thereof, which are suitable for soft rock and easy collapse Kong Weiyan in the field of traffic tunnels.
Background
Aiming at the common weak and fragile rock stratum construction in tunnel construction, a cementing and anchoring prestressed hollow anchor rod is generally used for timely reinforcement, so that the influence of rock collapse on the construction progress and personnel safety is prevented, but because the soft rock stratum is softer, fine gravels such as collapse rock soil and the like are extremely easy to collapse after hole forming, anchor holes are blocked, so that an anchoring agent and the anchor rod cannot penetrate into a stable rock stratum, and the due reinforcement effect is achieved. The traditional solution is that after the hole is collapsed, a drill rod is used for dredging the anchor hole again, after the complete removal of dregs is confirmed, a tool is used for pushing an anchoring agent to the bottom of the hole, and then an anchor rod is inserted for anchoring.
The installation of the adhesive anchoring prestress hollow anchor rod at the present stage has the following defects: 1. the whole construction process depends on manual operation, and has great potential safety hazard in the area which is not supported in time; 2. the size difference between the anchor hole and the anchor rod is too large after the tiny broken stone in the anchor hole is removed, and the actual anchoring force often cannot meet the standard requirement; 3. the installation is wasted time and energy, restricts the support construction efficiency, and the anchor rod has poor use effect.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a clear-hole anchor rod with an anchor agent hidden in a hole and an installation method thereof.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a clear anchor agent stock of hiding, includes anchor section body of rod and cavity body of rod, sets up the anchor head at the front end of anchor section body of rod, sets up resin anchor agent at anchor section body of rod inner chamber, sets up the metal end cap at the front end of cavity body of rod, establishes coupling nut at cavity body of rod front end cover, coupling nut is located the afterbody of anchor section body of rod and metal end cap, sets up out the thick liquid hole on the cavity body of rod, sets gradually at cavity body of rod rear end and ends thick liquid stopper, backing plate, sphere packing ring and hexagon nut.
Further, a grout outlet is formed in the tail of the anchoring section rod body.
Further, the metal plug is fixed at the front end of the hollow rod body in a welding mode.
Further, a guide cylinder is arranged at the tail end of the connecting nut.
Further, the guide cylinder is welded at the tail end of the connecting nut.
Further, the outer surface of the hollow rod body is provided with left-hand wave threads.
Further, an inner sleeve of the anchor rod trolley is sleeved behind the hexagon nut of the hollow rod body.
Further, an outer sleeve of the anchor rod trolley is sleeved outside the hexagonal nut and the inner sleeve.
The invention also provides a method for installing the anchor rod with the built-in anchor agent in the clear hole, which comprises the following steps:
step one, hole cleaning:
the assembled anchor rod body is arranged in a sleeve of the anchor rod trolley, the outer sleeve of the anchor rod trolley is driven to rotate positively, the hexagonal nut is driven to retract, self-locking is formed with the inner sleeve to drive the hollow rod body to rotate positively, the anchor section rod body is driven to rotate positively, and an anchor head arranged at the front end of the anchor section rod body is driven to rotate and break small broken stones, so that anchor hole cleaning is realized;
step two, anchoring:
the head of the anchor rod body is propped against the bottom of the anchor hole, the anchor rod trolley is driven to reversely rotate the inner sleeve, the hollow rod body is driven to reversely rotate, the hollow rod body is screwed in along the connecting nut, the resin anchoring agent is extruded and pushed out by the metal plug at the front end, and stirring of the anchoring agent is continuously realized by reversely rotating;
step three, pre-tightening:
after the anchoring agent is solidified, the outer sleeve of the anchor rod trolley reversely rotates to drive the hexagonal nut and the spherical washer to screw into and abut against surrounding rock along the hollow rod body, so that the application of the prestress of the anchor rod is realized;
step four, grouting:
the trolley pumps the premixed cement mortar into the inner hole of the hollow rod body, the cement mortar flows to the inner cavity of the rod body of the anchoring section through the grout outlet hole on the hollow rod body, flows to the anchor hole through the grout outlet hole on the rod body of the anchoring section after filling, and continues to fill the residual space until the mortar is filled to the position of the grout stop plug, and grouting is finished.
Compared with the prior art, the invention has the following positive effects:
1. according to the invention, the resin anchoring agent is embedded in the inner cavity of the rod body of the anchoring section, and is pushed out of the rod body in an injection mode, so that the resin anchoring agent can be integrated in the rod body after leaving the factory, the installation time of the on-site anchoring agent is reduced, and the method is suitable for the construction procedure of an anchor rod trolley;
2. the product is provided with the anchoring head, so that the collapsed rock and soil broken stone can be discharged, the rock and soil is prevented from entering the inside of the rod body, the hole cleaning effect is realized, and the anchoring head can effectively limit the rod body of the anchoring section to rotate after the product is pushed to the bottom of the hole, so that the follow-up anchoring agent can be pushed out conveniently;
3. the end of the hollow rod body is welded with a plug, the rod body can be limited to retract in the drilling stage, and the plug and the connecting nut form self-locking, so that the rod body of the anchoring section and the hollow rod body are driven to rotate together, and meanwhile, the plug can also effectively prevent the damaged anchoring agent from flowing back into the inner cavity of the rod body of the anchoring section;
4. the guide cylinder welded at the tail end of the connecting nut can effectively right the posture of the anchoring section rod body, so that the anchoring section rod body is coaxial with the hollow rod body, and the anchor rod trolley is convenient to find and install holes.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the overall composition of the present invention;
FIG. 2 is a schematic view of the process of breaking fine rock according to the present invention;
FIG. 3 is a schematic illustration of the process of agitating the anchoring agent of the present invention;
FIG. 4 is a schematic illustration of the pretensioning process of the present invention;
FIG. 5 is a schematic illustration of the grouting process of the present invention;
reference numerals in the drawings include: the anchoring head 1, the resin anchoring agent 2, the anchoring section rod body 3, the metal plug 4, the first grout outlet 5, the connecting nut 6, the guide cylinder 7, the hollow rod body 8, the second grout outlet 9, the grout stop 10, the backing plate 11, the spherical washer 12, the hexagonal nut 13, the fine broken stone 14, the outer sleeve 15 and the inner sleeve 16.
Detailed Description
A clear bore, concealed anchor bolt, as shown in fig. 1, comprising: the anchor head 1, the resin anchoring agent 2, the anchor section body of rod 3, metal end cap 4, first play thick liquid hole 5, coupling nut 6, guide cylinder 7, cavity body of rod 8, second play thick liquid hole 9, stop thick liquid stopper 10, backing plate 11, sphere packing ring 12, hexagon nut 13 etc. wherein:
the front end of the anchoring section rod body 3 is provided with an anchoring head 1, the inner cavity of the anchoring section rod body 3 is provided with a resin anchoring agent 2, the tail of the anchoring section rod body 3 is provided with a first grout outlet 5, the front end of the hollow rod body 8 is provided with a metal plug 4, the front end of the hollow rod body 8 is sleeved with a connecting nut 6 and a guide cylinder 7, the connecting nut 6 is positioned at the tail of the anchoring section rod body 3 and the metal plug 4, the hollow rod body 8 is provided with a second grout outlet 9, the rear end of the hollow rod body 8 is sequentially provided with a grout stop 10, a backing plate 11, a spherical gasket 12, a hexagonal nut 13 and an inner sleeve 16, and an outer sleeve 15 is sleeved outside the hexagonal nut 13 and the inner sleeve 16.
The invention also provides a method for installing the anchor rod with the built-in anchoring agent, which comprises the following steps:
step one, hole cleaning: the assembled anchor rod body is arranged in a sleeve of the anchor rod trolley, the outer sleeve of the anchor rod trolley is driven to rotate positively, the hexagonal nut 13 is driven to withdraw positively (left-handed threads) through the outer sleeve, the end face of the inner sleeve is abutted against and forms self-locking with the inner sleeve to drive the rod body to rotate, and the plug welded at the end part of the hollow rod body can limit the rod body to unscrew, so that the anchor rod body of the anchor section is driven to rotate positively, and the anchor hole is cleaned; in the process of breaking fine rock, as shown in fig. 2, an anchor rod is inserted into an anchor hole, and the anchor rod body cannot be completely inserted into the anchor hole due to fine broken stone 14 in the anchor hole, at the moment, an outer sleeve 15 of an anchor rod trolley is started to positively rotate (an inner sleeve 16 is driven to follow), a hexagonal nut 13 is driven to retreat (a hollow rod body 8 is left-handed threads), self-locking is formed with the inner sleeve to drive the hollow rod body 8 to positively rotate, and a metal plug 4 is welded at the tail end (the forefront end in the drawing) of the hollow rod body 8, and the metal plug 4 limits the hollow rod body 8 to unscrew a connecting nut 6 and drives an anchor section rod body 3 to positively rotate, so that an anchor head 1 arranged at the front end of the anchor section rod body 3 is driven to rotationally break the fine broken stone 14;
step two, anchoring: the head of the anchor rod body is propped against the bottom of the anchor hole, the anchor rod trolley is driven to reversely rotate the inner sleeve, the hollow rod body is driven to reversely rotate through the inner sleeve, the hollow rod body is screwed in along the connecting nut, the plug at the front end extrudes and pushes out the resin anchoring agent, and stirring of the anchoring agent is continuously realized by reversely rotating; the process of stirring the anchoring agent is shown in fig. 3, the inner sleeve 16 of the anchor rod trolley is started to reversely rotate (the outer sleeve 15 is driven to reversely rotate), the hollow rod body 8 is driven to reversely rotate through threads and to screw forwards along the connecting nut 6, at the moment, the metal plug 4 extrudes the built-in resin anchoring agent 2 and extrudes the resin anchoring agent, and the hollow rod body 8 is continuously rotated to stir the anchoring agent after the extrusion is finished;
step three, pre-tightening: after the anchoring agent is solidified, the outer sleeve of the anchor rod trolley reversely rotates to drive the spherical nut to screw into the tight surrounding rock along the rod body, so that the application of the prestress of the anchor rod is realized; the pre-tightening process is shown in fig. 4, after the anchor rod trolley is solidified for a period of time, the outer sleeve 15 of the anchor rod trolley is reversely rotated (the inner sleeve 16 is static), the hexagonal nut 13 and the spherical washer 12 are driven to be screwed into the surrounding rock along the hollow rod body 8, and the application of the pre-stress of the anchor rod is realized by applying torque through equipment;
step four, grouting: the trolley pumps the premixed cement mortar into the inner hole of the hollow rod body, and flows out from a reserved grout outlet hole at the tail end of the rod body, so that grouting of the anchor rod is realized. In the grouting process, as shown in fig. 5, the trolley pumps the premixed cement mortar into the inner hole of the hollow rod body, the cement mortar is conveyed to the second grout outlet 9 through the inner hole of the hollow rod body 8 and flows to the anchoring section cavity from the second grout outlet 9, after filling, the cement mortar flows to the anchor hole through the first grout outlet 5 on the anchoring section rod body 3, the residual space is continuously filled until the mortar is filled to the position of the grout stop plug 10, grouting is finished, then equipment is separated, and support is completed.
The working principle of the invention is as follows:
1) The invention integrates the resin anchoring agent into the inner cavity of the rod body of the anchoring section, converts the rotary motion into linear motion through threads, and pushes the anchoring agent out of the rod body;
2) The end of the hollow rod body is connected with the plug (the connection mode is not limited to the welding mentioned in the specification), the rod body can be limited to retract in the drilling stage, the self-locking driving rod body is formed with the connecting nut to rotate, and the damaged anchoring agent can be effectively prevented from flowing back into the inner cavity of the rod body of the anchoring section in the anchoring stage;
3) According to the invention, the end of the product anchoring section is provided with the anchoring head (the matching mode of the anchoring head and the anchoring section rod body is not limited to the assembly mentioned in the text), so that the collapsed rock and soil broken stone can be discharged, the rock and soil can be prevented from entering the interior of the rod body, the hole cleaning effect is realized, and the rotation of the anchoring section rod body is effectively limited in the anchoring stage;
4) According to the invention, the end of the connecting nut is additionally provided with a section of guide cylinder (the connecting mode is not limited to welding mentioned herein, and can be an integral mode, etc.), so that the posture of the anchoring section rod body can be effectively straightened, and the anchoring section rod body and the hollow rod body are coaxial.
Claims (9)
1. The utility model provides a clear anchor agent stock of hiding which characterized in that: including anchor section body of rod and cavity body of rod, set up the anchor head at the front end of anchor section body of rod, set up resin anchor in anchor section body of rod inner chamber, set up the metal end cap at the front end of cavity body of rod, establish coupling nut at cavity body of rod front end cover, coupling nut is located the afterbody of anchor section body of rod and metal end cap, sets up out the thick liquid hole on the cavity body of rod, sets gradually at cavity body of rod rear end and ends thick liquid stopper, backing plate, sphere packing ring and hexagon nut.
2. The clear-hole embedded anchor bolt according to claim 1, wherein: and a slurry outlet is arranged at the tail part of the anchoring section rod body.
3. The clear-hole embedded anchor bolt according to claim 1, wherein: the metal plug is fixed at the front end of the hollow rod body in a welding mode.
4. The clear-hole embedded anchor bolt according to claim 1, wherein: a guide cylinder is arranged at the tail end of the connecting nut.
5. The clear hole anchor bolt of claim 4, wherein: the guide cylinder is welded at the tail end of the connecting nut.
6. The clear-hole embedded anchor bolt according to claim 1, wherein: the outer surface of the hollow rod body is provided with left-hand wave threads.
7. The clear-hole embedded anchor bolt according to claim 1, wherein: an inner sleeve of the anchor rod trolley is sleeved behind the hexagonal nut of the hollow rod body.
8. The clear hole concealed anchor bolt as claimed in claim 7, wherein: and an outer sleeve of the anchor rod trolley is sleeved outside the hexagonal nut and the inner sleeve.
9. A method for installing a clear-hole embedded anchoring agent anchor rod based on the method for installing the clear-hole embedded anchoring agent anchor rod disclosed in claim 1, which is characterized in that: the method comprises the following steps:
step one, hole cleaning:
the assembled anchor rod body is arranged in a sleeve of the anchor rod trolley, the outer sleeve of the anchor rod trolley is driven to rotate positively, the hexagonal nut is driven to retract, self-locking is formed with the inner sleeve to drive the hollow rod body to rotate positively, the anchor section rod body is driven to rotate positively, and an anchor head arranged at the front end of the anchor section rod body is driven to rotate and break small broken stones, so that anchor hole cleaning is realized;
step two, anchoring:
the head of the anchor rod body is propped against the bottom of the anchor hole, the anchor rod trolley is driven to reversely rotate the inner sleeve, the hollow rod body is driven to reversely rotate, the hollow rod body is screwed in along the connecting nut, the resin anchoring agent is extruded and pushed out by the metal plug at the front end, and stirring of the anchoring agent is continuously realized by reversely rotating;
step three, pre-tightening:
after the anchoring agent is solidified, the outer sleeve of the anchor rod trolley reversely rotates to drive the hexagonal nut and the spherical washer to screw into and abut against surrounding rock along the hollow rod body, so that the application of the prestress of the anchor rod is realized;
step four, grouting:
the trolley pumps the premixed cement mortar into the inner hole of the hollow rod body, the cement mortar flows to the inner cavity of the rod body of the anchoring section through the grout outlet hole on the hollow rod body, flows to the anchor hole through the grout outlet hole on the rod body of the anchoring section after filling, and continues to fill the residual space until the mortar is filled to the position of the grout stop plug, and grouting is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311737376.6A CN117738708A (en) | 2023-12-18 | 2023-12-18 | Hole-cleaning anchor rod with built-in anchoring agent and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311737376.6A CN117738708A (en) | 2023-12-18 | 2023-12-18 | Hole-cleaning anchor rod with built-in anchoring agent and installation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117738708A true CN117738708A (en) | 2024-03-22 |
Family
ID=90255703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311737376.6A Pending CN117738708A (en) | 2023-12-18 | 2023-12-18 | Hole-cleaning anchor rod with built-in anchoring agent and installation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117738708A (en) |
-
2023
- 2023-12-18 CN CN202311737376.6A patent/CN117738708A/en active Pending
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