CN106285742B - A kind of expansion grouted anchor bar and anchoring process - Google Patents
A kind of expansion grouted anchor bar and anchoring process Download PDFInfo
- Publication number
- CN106285742B CN106285742B CN201610888347.3A CN201610888347A CN106285742B CN 106285742 B CN106285742 B CN 106285742B CN 201610888347 A CN201610888347 A CN 201610888347A CN 106285742 B CN106285742 B CN 106285742B
- Authority
- CN
- China
- Prior art keywords
- rod
- expansion
- platform
- anchor bar
- grouted anchor
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 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 present invention relates to a kind of expansion grouted anchor bar and anchoring process, belong to geotechnical engineering correlative technology field.Grouted anchor bar part includes mainly the body of rod for having front end and rear end, and the body of rod is hollow structure, and outside has screw thread；There is grouting port and grout outlet on the body of rod；Housing is respectively arranged on the body of rod from front to back, pre-tighten platform and pre-tightens handle；Wherein, there is housing positioning region, positioning region to be connect with multiple expansion plates, and positioning region is installed on the front end of the body of rod and forms screw-thread fit with the body of rod；Have in the inside of the expansion plate and pre-tighten platform, pre-tightens platform and be socketed on the body of rod；Handle is pre-tightened for pushing preload platform to be moved along body of rod axis, handle is pre-tightened and forms screw-thread fit with the body of rod.
Description
Technical field
The present invention relates to geotechnical engineering correlative technology fields, in particular to a kind of expansion grouted anchor bar and anchoring
Method.
Background technology
Anchor pole is widely used in mine working surrounding rock supporting at present, while being also widely used in engineering technology, side slope, tunnel
Road, dam body carry out main body reinforcing, are the key that the tensile capacity of solution country rock body is low, so that the carrying energy of Rock And Soil itself
Power greatly reinforces.
In real Construction practices, anchor pole external screw-thread is mostly relied on to increase the frictional force with rock mass, and the shape to drill is logical
Often it is not pure circle column type, this will result in anchor pole external screw-thread and can not be all adjacent to surrounding rock body, causes anchorage point and sets
It is inconsistent to count position, influences subsequent construction.
Meanwhile anchor pole, after being packed into drilling, tail portion does not have sealing device.After the completion of rockbolt installation, noted from anchor pole tail portion
The slurries entered can be overflowed by gravity from drilling, and anchoring strength is caused to be less than design strength.
Invention content
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of expansion grouted anchor bar.The present invention is logical
It crosses and anchor structure is improved so that it can firmly be sticked in drilling, and can realize anchor pole tail seal, it is ensured that anchor
Tenacity is almost consistent with design.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of expansion grouted anchor bar, including：
The body of rod with front end and rear end, the body of rod are hollow structure, and outside has screw thread；
There is grouting port and grout outlet on the body of rod；
Housing is respectively arranged on the body of rod from front to back, pre-tighten platform and pre-tightens handle；
Wherein,
There is housing positioning region, positioning region to be connect with multiple expansion plates, and positioning region is installed on the front end of the body of rod and and the body of rod
Form screw-thread fit；
Have in the inside of the expansion plate and pre-tighten platform, pre-tightens platform and be socketed on the body of rod；
Handle is pre-tightened for pushing preload platform to be moved along body of rod axis, handle is pre-tightened and forms screw-thread fit with the body of rod.
Preferably, the body of rod is variable-diameter structure, and leading portion diameter is small, and stage casing diameter is big, and back segment diameter is small.
Preferably, there is arc eave tile on the outside of the expansion plate.
Preferably, the body of rod is the structure of both ends open, and the opening of front end is grout outlet, and the opening of rear end is slip casting
Mouthful.
Preferably, the body of rod has the open slot flowed out for slurries.
Preferably, the open slot is located at the middle part of the body of rod.
Preferably, the preload platform is truncated cone-shaped structure.
Preferably, the body of rod leading portion is also equipped with the first stop nut limited for the positioning region.
Preferably, the body of rod back segment is equipped with sealed bolster plate and the second stop nut.
While providing above structure scheme, the present invention also provides a kind of anchoring process based on above-mentioned anchor pole, steps
It is rapid as follows：
A, first stop nut, housing are installed on the body of rod from front to back successively, pre-tighten platform and pre-tighten handle；
B, anchor pole is placed in drilling, rotation, which pre-tightens handle, makes preload platform extrusion expansion plate that expansion plate be made to be close to the wall of a borehole；
C, sealed bolster plate is installed in body of rod rear end and tightens the second stop nut, the positioning of realization preload platform is simultaneously close to drilling
Envelope；
D, slip casting is carried out, after grout cures, completes anchoring.
The beneficial effects of the invention are as follows：
(1) it can be achieved to take different body of rod housings according to the case where different surrounding rock rock mass, realize in the construction process more
Secondary preload, the mode of grouting behind shaft or drift lining, the larger frictional force for increasing anchor pole and country rock also just greatly improve anchor force and resist
Drawing ability enhances country rock body cohesive strength so that the bearing capacity of Rock And Soil itself greatly reinforces, have it is efficient, it is repeatedly pre-
Tightly, the advantages that selecting on demand.
(2) ensure that pre-tightening platform will not retreat by backing plate and the second stop nut after the completion of pre-tightening, it is ensured that pretensioning effect, and
The sealing that can realize drilling prevents the improper spilling of slurries, influences anchoring strength.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the perspective view of the present invention；
Fig. 3 is the structural schematic diagram of the body of rod in the present invention；
Fig. 4 is the structural schematic diagram of housing in the present invention；
Fig. 5 is the perspective view that platform is pre-tightened in the present invention；
In figure：1. the body of rod；2. the first stop nut；3. positioning region；4. open slot；5. pre-tightening platform；6. pre-tightening handle；7. close
Packing plate, 8. second stop nuts, 9. arc eave tiles, 10. expansion plates.
Specific implementation mode
Below in conjunction with attached drawing, the present invention is described in detail.
Embodiment：A kind of expansion grouted anchor bar, structure is as shown in Figs. 1-5, including：
The body of rod 1 with front end and rear end, the body of rod 1 are three sections of variable-diameter structures, and stage casing diameter is big, leading portion and back segment diameter
Small, there is screw thread, inner hollow to be flowed for slurries for outside.The leading portion of the body of rod 1 and the thread pitch of back segment are smaller, stage casing
Screw pitch is larger.
There is grouting port and grout outlet on the body of rod 1.
The first stop nut 2, housing are respectively arranged on the body of rod 1 from front to back, platform 5 is pre-tightened, pre-tightens handle 6, is close
Packing plate 7 and the second stop nut 8.First stop nut 2, which is installed on leading portion, housing and pre-tightens platform 5, is installed on stage casing, other portions
Divide and is installed on back segment.
Wherein, housing has positioning region 3, and positioning region 3 is connect with multiple expansion plates 10, before positioning region 3 is installed on the body of rod 1
It holds and forms screw-thread fit with the body of rod 1,10 outside of each expansion plate all has arc eave tile 9.Expansion plate 10 can be selected as four
A rectangular steel plates are flexibly connected with positioning region 3.Such as can be by hanging on positioning region 3.
Have in the inside of the expansion plate 10 and pre-tighten platform 5, pre-tightens platform 5 and be socketed on the body of rod 1；
Handle 6 is pre-tightened for pushing preload platform 5 to be moved along 1 axis of the body of rod, preload handle 6 forms screw-thread fit with the body of rod 1,
It pre-tightens handle 6 and is installed on the position of stage casing on the lower.Pre-tightening tool on handle 6, there are four overhanging connecting rods, can dismantle.
Housing can there are many ways of realization, e.g. by long rectangular steel plates active link of several parts with reverse wedge to one
It rises, is linked on the positioning region 3 to match with body of rod screw thread or rectangle casing.Long rectangular steel plates can have different area rule
Lattice, 9 layout density of arc eave tile above steel plate also take different specifications, are assembled according to the country rock situation in specific implementation process
Different housings can efficiently utilize anchor pole, greatly increase the frictional resistance of anchor pole and surrounding Rock And Soil, reach ideal in this way
Anchoring effect.
As preferred structure, the body of rod 1 can both ends all have opening, the opening of front end is grout outlet, and rear end is opened
Mouth is grouting port, and middle-end has the longitudinal opening slot 4 flowed out for slurries.Open slot 4 can be 2, connect with the inner cavity of the body of rod 1
It is logical.
Preload platform 5 is truncated cone-shaped structure, can to pre-tighten platform 5 during advance, gradual extrusion expansion plate 10 makes
The gradually expansion outward of expansion 10, until the wall of a borehole is closely attached on, to increase the frictional force of anchor pole and hole wall.
While providing above structure scheme, the present invention also provides a kind of anchoring process based on above-mentioned anchor pole, main
Want that steps are as follows：
A, first stop nut, housing are installed on the body of rod 1 from front to back successively, pre-tighten platform 5 and pre-tighten handle 6；
B, anchor pole is placed in drilling by manpower or machinery, rotation, which pre-tightens handle 6, makes 5 extrusion expansion plate 10 of preload platform make
Expansion plate 10 is close to the wall of a borehole；
C, step B is repeated until pre-tightening platform 5 can not move；
D, sealed bolster plate 7 is installed in 1 rear end of the body of rod and tightens the second stop nut 8, realize the positioning for pre-tightening platform 5 and to boring
Hole seals；
E, slip casting is exhausted to the body of rod 1, slurries enter Rock And Soil gap and housing by 1 inner cavity of the body of rod by open slot 4
In contact gap with Rock And Soil, to make Rock And Soil and the body of rod form an overall structure, greatly reinforced tensile capacity and
Supporting effect.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
A variety of modifications of embodiment will be apparent to those skilled in the art, it is as defined herein general
Principle can be realized in other embodiments without departing from the spirit or scope of the present invention, is not described in detail
The part presented with partial enlargement is the prior art, herein without repeating.Therefore, the present invention is not intended to be limited to herein
Shown in these embodiments, and be to fit to the widest range consistent with principles disclosed herein and feature.
Claims (8)
1. a kind of expansion grouted anchor bar, which is characterized in that including：
The body of rod with front end and rear end, the body of rod are hollow structure, and outside has screw thread；
There is grouting port and grout outlet on the body of rod；
Housing is respectively arranged on the body of rod from front to back, pre-tighten platform and pre-tightens handle；
Wherein,
There is housing positioning region, positioning region to be connect with multiple expansion plates, and positioning region is installed on the front end of the body of rod and is formed with the body of rod
Screw-thread fit；
Have in the inside of the expansion plate and pre-tighten platform, pre-tightens platform and be socketed on the body of rod；
Handle is pre-tightened for pushing preload platform to be moved along body of rod axis, handle is pre-tightened and forms screw-thread fit with the body of rod；
The body of rod is variable-diameter structure, and leading portion diameter is small, and stage casing diameter is big, and back segment diameter is small；
There is arc eave tile on the outside of the expansion plate.
2. expansion grouted anchor bar according to claim 1, which is characterized in that the body of rod is the structure of both ends open, preceding
The opening at end is grout outlet, and the opening of rear end is grouting port.
3. expansion grouted anchor bar according to claim 1, which is characterized in that the body of rod has the opening flowed out for slurries
Slot.
4. expansion grouted anchor bar according to claim 3, which is characterized in that the open slot is located at the middle part of the body of rod.
5. expansion grouted anchor bar according to claim 1, which is characterized in that the preload platform is truncated cone-shaped structure.
6. expansion grouted anchor bar according to claim 1, which is characterized in that the body of rod leading portion is also equipped with for described
First stop nut of positioning region limit.
7. expansion grouted anchor bar according to claim 1, which is characterized in that the body of rod back segment be equipped with sealed bolster plate and
Second stop nut.
8. a kind of anchoring process expanding grouted anchor bar based on claim 1-7 any one of them, which is characterized in that step is such as
Under：
A, first stop nut, housing are installed on the body of rod from front to back successively, pre-tighten platform and pre-tighten handle；
B, anchor pole is placed in drilling, rotation, which pre-tightens handle, makes preload platform extrusion expansion plate that expansion plate be made to be close to the wall of a borehole；
C, sealed bolster plate is installed in body of rod rear end and tightens the second stop nut, realize the positioning for pre-tightening platform and to borehole sealing；
D, slip casting is carried out, after grout cures, completes anchoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888347.3A CN106285742B (en) | 2016-10-11 | 2016-10-11 | A kind of expansion grouted anchor bar and anchoring process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888347.3A CN106285742B (en) | 2016-10-11 | 2016-10-11 | A kind of expansion grouted anchor bar and anchoring process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106285742A CN106285742A (en) | 2017-01-04 |
| CN106285742B true CN106285742B (en) | 2018-08-07 |
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ID=57717794
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610888347.3A Active CN106285742B (en) | 2016-10-11 | 2016-10-11 | A kind of expansion grouted anchor bar and anchoring process |
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| CN (1) | CN106285742B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026068B (en) * | 2018-08-15 | 2023-11-24 | 中山大学 | Shield tunnel wall rear grouting auxiliary mechanism and grouting method |
| CN111894625B (en) * | 2020-08-13 | 2022-03-08 | 高军 | Large-section weak surrounding rock high-prestress anchor rod supporting method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064312A (en) * | 1989-07-20 | 1991-11-12 | Jennmar Corporation | Delay stopper for a mine roof anchor and method of manufacture thereof |
| US5076733A (en) * | 1990-05-04 | 1991-12-31 | Jennmar Corporation | Mine roof anchor assembly having an expansion shell assembly with a friction reducing means |
| CN201802429U (en) * | 2010-07-22 | 2011-04-20 | 成都四海岩土工程有限公司 | Expanding shell type center hole exhaust and grouting prestressed anchor rod |
| CN204458714U (en) * | 2014-11-18 | 2015-07-08 | 董礼广 | A kind of crab-bolt |
| GB2529109A (en) * | 2013-05-07 | 2016-02-10 | Technical Services Team Ltd | Self-boring shield anchor apparatus and method |
| CN205533617U (en) * | 2016-04-25 | 2016-08-31 | 重庆三龙橡塑模具制品有限公司 | Fastener |
-
2016
- 2016-10-11 CN CN201610888347.3A patent/CN106285742B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064312A (en) * | 1989-07-20 | 1991-11-12 | Jennmar Corporation | Delay stopper for a mine roof anchor and method of manufacture thereof |
| US5076733A (en) * | 1990-05-04 | 1991-12-31 | Jennmar Corporation | Mine roof anchor assembly having an expansion shell assembly with a friction reducing means |
| CN201802429U (en) * | 2010-07-22 | 2011-04-20 | 成都四海岩土工程有限公司 | Expanding shell type center hole exhaust and grouting prestressed anchor rod |
| GB2529109A (en) * | 2013-05-07 | 2016-02-10 | Technical Services Team Ltd | Self-boring shield anchor apparatus and method |
| CN204458714U (en) * | 2014-11-18 | 2015-07-08 | 董礼广 | A kind of crab-bolt |
| CN205533617U (en) * | 2016-04-25 | 2016-08-31 | 重庆三龙橡塑模具制品有限公司 | Fastener |
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| Publication number | Publication date |
|---|---|
| CN106285742A (en) | 2017-01-04 |
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