CN108756976A - A kind of self-expanding anchor pole and its preparation and application - Google Patents
A kind of self-expanding anchor pole and its preparation and application Download PDFInfo
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- CN108756976A CN108756976A CN201810594741.5A CN201810594741A CN108756976A CN 108756976 A CN108756976 A CN 108756976A CN 201810594741 A CN201810594741 A CN 201810594741A CN 108756976 A CN108756976 A CN 108756976A
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- expanding
- anchor pole
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- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 66
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 239000011435 rock Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 230000008961 swelling Effects 0.000 claims abstract description 25
- 238000004873 anchoring Methods 0.000 claims abstract description 17
- 230000004224 protection Effects 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 21
- 230000008093 supporting effect Effects 0.000 claims description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000440 bentonite Substances 0.000 claims description 8
- 229910000278 bentonite Inorganic materials 0.000 claims description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000005074 turgor pressure Effects 0.000 claims description 6
- 238000009736 wetting Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 238000010146 3D printing Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 210000000746 body region Anatomy 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims description 2
- 235000019441 ethanol Nutrition 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 230000003467 diminishing effect Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 description 13
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000251323 Matthiola oxyceras Species 0.000 description 1
- 102100023170 Nuclear receptor subfamily 1 group D member 1 Human genes 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 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
- E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material
-
- 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
- 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
- E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Joining Of Building Structures In Genera (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A kind of self-expanding anchor pole and its preparation and application, self-expanding anchor pole are formed by the body of rod, the self-expanding body on the body of rod, mounted on the reverse anti-skid device of lever front end and the locked instrument positioned at body of rod rear end；Self-expanding body is made of powder column, powder column fixing device and powder column sealed waterproof device.Self-expanding body anchor pole is assembled by powder column, the body of rod, reverse anti-skid device, locked instrument, self-expanding body fixing device and the powder column sealed waterproof device made.Elastic water resisting protection set is first released when use; then anchor pole is impregnated in water; put on elastic water resisting protection set again again; anchor pole is inserted into drilling; swelling agent reaction in powder column generates the bulbs of pressure and racks the sleeve outer wall of powder column; the anchoring body that compact high-strength is formed with borehole wall, powerful anchor force is provided for roadway surrounding rock.
Description
Technical field：
The present invention relates to geotechnical engineering supporting, especially a kind of self-expanding anchor pole and its preparation and application.
Background technology
Anchor pole be it is a kind of be made of high tensiles such as steel, be mounted on rock mass inside, for building foundation pit, dew
Its side slope, tunnel and well lane engineering carry out the rod-shaped tensional element of supporting.When using suspension roof support, first to wall rock drill-hole, then
Anchor pole is installed in hole, utilizes the mechanism or dependence cement mortar, the bonding of resin medicament and country rock between anchor head and country rock
It acts on or by the rubbing action between pipe seam and country rock, is equipped with supporting plate and locking nut by surrounding rock consolidation, plays supporting anchor
Solid effect.Suspension roof support is a kind of active support mode simple in structure, it makes country rock become active support from passive carrying,
Supporting effect is improved, has many advantages, such as that construction is simple, deformation controlling for rock surrounding gateways effect are good, is building foundation pit, open slope, tunnel
With common a kind of support reinforcement mode in well lane engineering.
Due to the diversity of the complexity and geotechnical engineering supporting demand of geological conditions, the type of anchor pole has very much.In early days
The anchor pole of appearance has the mechanical anchor bolts such as slot-and-wedge type, reverse wedge formula and swollen shell-type, occurs grouted anchor bar and resin anchor etc. later
Cohere type anchor pole and quick-hardening cementroll expansion anchor rod, double-quick cement expansion anchor rod, Swellex hydraulic expansions anchor pole and pipe seam
The expandable frictionals type anchor pole such as formula anchor pole.Wherein, slot-and-wedge type, reverse wedge formula and swollen shell-type mechanical anchor bolt belong to passive protecting anchor pole,
It can only passively bear to carry the power that country rock is applied.When country rock is soft, broken, because anchoring effect is poor, should not use.
The expandable frictionals type anchor pole such as Swellex hydraulic expansions anchor pole and pipe-seam type anchor rod squeezes hole wall by the expansion of the body of rod itself, with
Country rock is in direct contact generation frictional force and plays anchorage effect, and anchoring strength depends on the plastic deformation of the body of rod, once the body of rod becomes
Shape state changes, and anchoring strength can also change correspondingly；And the body of rod is directly contacted with country rock, is vulnerable to faintly acid underground scale
It loses and fails.Grouted anchor bar and resin anchor etc. need to build by Anchor Agents such as mortar, quick hardening cement slurry, resin binders
Contacting between apeak bar and country rock, such anchor pole, intensity are often depending on the intensity of Anchor Agent, when Anchor Agent is broken
Bad when, anchor pole directly fail；And cement mortar, quick hardening cement slurry etc. need that slurry is prepared in situ, and hole is sent by high-pressure pump
Interior, work progress is complicated.In addition, resin explosive roll, although working procedure is simple, anchoring strength is high, but cost is higher.
As superficial part easily adopts the exhaustion of resource, orebody mining is under superficial part uneasily mining orebody and deep " a three high disturbances " environment
The inexorable trend of the following mining mineral resource.Superficial part breaking ore body and deep high stress mining environment, support work amount are big, it is desirable that
It is high.The mechanical anchor bolts such as slot-and-wedge type, reverse wedge formula and swollen shell-type are because anchor force is small, poor corrosion resistance, using having gradually decreased；Slip casting
Because working procedure is more, setting time is long for anchor pole and quick-hardening cement expansion anchor rod, works slow, in deep " a three high disturbances " breaking ring
Using also by larger limitation under border；Resin anchor is although play a role fast, construction is simple, but resin explosive roll cost is higher, greatly
When range applications, support cost is too high.
Therefore, the novel active support anchor that a kind of carrying is fast, anchor force is big, installation is easy, production cost is low is researched and developed
Bar is that the mineral resources under exploitation is broken and deep " a three high disturbances " environment are required.
Invention content
The purpose of the present invention be exactly adapt to the demand provide it is a kind of it is simple in structure, easy to use, manufacturing cost is low, anchoring
Strong, the applied widely self-expanding anchor pole of power and its preparation and application.
To achieve the above object, self-expanding anchor pole provided by the invention, including the body of rod, interval be mounted on the body of rod from swollen
Swollen body is mounted on the reverse anti-skid device of lever front end and the locked instrument positioned at body of rod rear end；
The self-expanding body includes powder column, powder column fixing device and powder column sealed waterproof device；
The powder column includes the circular ring shape double layer sleeve barrel being sleeved on the body of rod, and one end of double layer sleeve barrel is closed, and the other end has cylinder
The outer wall of lid, double layer sleeve barrel offers permeable hole, swelling agent is housed in double layer sleeve barrel, having between swelling agent and double layer sleeve barrel has
The seepy material of toughness；
The powder column fixing device includes positioned at powder column both ends, the fastening nut and gasket that are threadedly coupled with the body of rod；
Screwing fastening nut can make gasket clamp powder column, and powder column is fixed on the body of rod；
The powder column sealed waterproof device is the elastic water resisting protection set being sleeved on outside powder column；
The reverse anti-skid device includes the long hex nut being threadedly coupled with lever front end and six by stock and quarter butt
One end is hinged the foldable metallic support of composition；The front end (i.e. the other end of stock) of six metallic supports respectively with welding
Hinged ear on six planar outer walls of long hex nut is hinged；The rear end (i.e. the other end of quarter butt) of metallic support has and is cut with scissors with it
The sliding block connect, the sliding block can be along corresponding with the hinged ear, longitudinal slideway slidings being opened on long hex nut planar outer walls；
Sliding block forward slip closes up (state when anchor pole is not used) to terminal metallic support, and sliding block slides backward metallic support and opens (anchor
Bar is placed in state in drilling)；
The locked instrument positioned at body of rod rear end includes the supporting plate for being sleeved on body of rod rear end and the rear end screw thread with the body of rod
The locking nut of connection, anchor pole using when supporting plate and country rock palisades can be made to compress by screwing locking nut.
The seepy material is geotextiles or non-woven fabrics；
The swelling agent by CaO, bentonite, hardened material, absolute ethyl alcohol, water-reducing agent and retarder mixing form, respectively at
Point weight proportion be：CaO 65%, bentonite 2%, hardened material 15%, absolute ethyl alcohol 10%, water-reducing agent 1%, retarder
7%；
The outer diameter of the powder column is less than wall rock drill-hole 3mm.
The preparation method of above-mentioned self-expanding anchor pole, includes the following steps：
(1) powder column is made in the following order
1) using plastics or other high molecular materials as raw material, use casting, founding or 3D printing method that length is made as 10
~15cm, the double layer sleeve barrel that wall thickness is 0.5~1mm and matched cover；It is straight that the endoporus aperture of double layer sleeve barrel is more than the body of rod
The outer diameter of diameter 2mm, double layer sleeve barrel are less than bore diameter 3mm；It is symmetrically opened up in the outer wall both sides of double layer sleeve barrel spaced saturating
Water hole；
2) raw material is weighed according to the weight proportion of swelling agent ingredient；By in raw material CaO, bentonite, hardened material,
Water-reducing agent and retarder mixing, are stirring evenly and then adding into absolute ethyl alcohol and continue to stir, and wetting shape swelling agent is made；
3) seepy material is cut into the rectangle that length is identical as double layer sleeve barrel length, width is equal to double layer sleeve barrel outer diameter perimeter
Sheet , Stickers are attached to the inside outer wall of double layer sleeve barrel；Then manufactured wetting shape swelling agent in 2) is passed through into mechanical or manual mode
It is filled into double layer sleeve barrel, packed density reaches 1.8~2.1g/m3Afterwards, with cover encryption sealing encapsulation；
4) will 3) filling wetting shape swelling agent double layer sleeve barrel be placed on (drying box) 40 under 70~80 DEG C of environment~
50min makes internal ethyl alcohol volatilization, powder column is made；
(2) body of rod, reverse anti-skid device, locked instrument, the fixing device of self-expanding body and the powder column sealing of anchor pole are made
Water-tight device
The body of rod of a diameter of 18~22mm is made of finish rolling deformed bar by the design length of anchor pole, in the front end of the body of rod
Vehicle goes out screw thread respectively for portion, rear end and the intermediate both ends for installing self-expanding body region additional；
The long hex nut for 60mm with lever front end screw-thread fit, length is made, at six of long hex nut outer wall
Hinged ear is respectively welded in the front end of plane, and corresponding each hinged ear axially opens up T shape sliding slots in each plane, placed in sliding slot
With the sliding block of T shape sliding slots cooperation；It is 5mm with thickness, width 10mm, length are respectively two of 60mm and 45mm flat-shaped stainless
Folding metallic support is hingedly made in steel pole one end, and the front end of metallic support is hinged with hinged ear, and rear end is hinged with sliding block,
Reverse anti-skid device is made；
Be 15mm with thickness, supporting plate is made in the square steel plate that the length of side is 15mm, with the heat being threadedly coupled with body of rod rear end
Hex nut is rolled as locking nut, is assembled into the locked instrument of anchor pole, it is spare；
Gasket is made with the circular ring shape steel disc that thickness is 5mm, internal diameter 24mm, outer diameter are 40mm, with self-expanding body two
The hot rolling hex nut that the body of rod of end position is threadedly coupled forms the fixing device of self-expanding body as fastening nut；
The elasticity that internal diameter is slightly less than powder column outer diameter, length is slightly larger than self-expanding body length is made in the silica gel for being 1mm with thickness
Water resisting protection set is used as powder column sealed waterproof device；
(3) assembling self-expanding body anchor pole
Long hex nut (is screwed in the body of rod by the front end that reverse anti-skid device made of step (2) is mounted on to anchor rod body
On the screw thread of front end)；By the design length for often saving self-expanding body, takes an appropriate number of powder column to connect, be sleeved on the body of rod from front to back
Setting position, while will often save self-expanding body using the fastening nut of self-expanding body and gasket and be separately fixed on the body of rod；So
Manufactured elastic water resisting protection set is strutted afterwards, is sleeved on the outside of self-expanding body one by one, self-expanding body is carried out waterproof and dampproof close
Envelope completes the assembling of self-expanding body anchor pole.
The application method of above-mentioned self-expanding anchor pole is：
Self-expanding anchor pole releases in use, first covering elastic water resisting protection, and anchor pole is then placed in water immersion；Water from
Permeable hole on double layer sleeve barrel outer wall is entered by permeability flexible material in internal swelling agent, and impregnating after 6~8min will be from swollen
Swollen anchor pole takes out from water, and elastic water resisting protection set is covered again on self-expanding body after steeping, is then inserted into anchor pole and bores
Kong Zhong；Wait for 30~50min, the swelling agent reaction expansion in powder column, turgor pressure racks the outer wall of double layer sleeve barrel, forms anchoring
Agent generates radial compression to borehole wall by elastic water resisting protection set, so that anchor rod body is coupled with borehole wall, most
After form anchoring body；Supporting plate is through to the body of rod rear end for exposing drilling, the lock that screwed forward is threadedly coupled with body of rod rear end at this time
Tight nut makes supporting plate be close to the country rock around drilling, completes installing and using for self-expanding anchor pole.
The working principle and beneficial effect of the present invention：
1, the present invention is reacted using CaO and water
CaO+H2O=Ca (OH)2
Calcium hydroxide is generated, is expanded during the reaction along with molecular crystalline, powder column is made integrally to expand, in space
Great turgor pressure is generated in the case of constraint, turgor pressure effect under, the double layer sleeve barrel of powder column is squeezed and broken, self-expanding powder column with
It is in close contact between borehole wall and the body of rod, forms the anchoring body of compact high-strength.Anchoring body generates borehole wall and anchor rod body
Prodigious compression provides powerful anchor force for roadway surrounding rock；Anchoring body makes self-expanding to the powerful turgor pressure of borehole wall
Rock mass between body forms strong squeezing action, and this squeezing action can greatly improve the overall stability of roadway surrounding rock,
The failure mode for changing rock mass, when country rock is there are movement tendency or moves, rubbing between country rock and self-expanding anchor pole
The anchoring effect of self-expanding anchor pole can be improved by wiping power.
2, the present invention packs swelling agent using the double layer sleeve barrel made of plastics or organic material by permeability flexible material,
Packaging speed can be improved to a certain extent, and can protect powder column in use not by damage.
3, the self-expanding body in the present invention is distributed on anchor rod body using interval mode, is made by fastening nut and gasket
It is fixed, and the turgor pressure generated using interval powder column forms the anchoring body that sphere of action is wider, is more evenly distributed in the borehole, when
Country rock, even if some self-expanding body anchoring effect of part declines or failure, has no effect on there are movement tendency or when moving
The anchoring effect of other self-expanding bodies.
4, self-expanding of the present invention is wrapped up elastic water resisting protection set and can be risen while not influencing powder column expansion effect in vitro
To following effect：First, there is certain water proof moisture-proof role to the powder column prepared, avoid powder column in storage or transportational process
Middle generation water absorption reaction causes self-expanding anchor pole to fail；Second is that self-expanding anchor pole is put into swelling agent in drilling reacts swollen with water
Powder column is isolated from the outside world when swollen, it is made not destroyed by slightly acidic water in ambient enviroment, expands the suitable of self-expanding anchor pole
Use range；Third, playing temporary effect of contraction after being put into drilling to the powder column after immersion, prevent swelling agent between powder column and drilling
Gap in spray.
5, self-expanding anchor pole of the present invention can mechanization batch production, manufacturing cost is cheap, easy to carry, operates with letter
Just, reaction speed is fast, and anchoring effect is good.
Description of the drawings
Fig. 1 is the axial sectional view of self-expanding anchor pole of the present invention；
Fig. 2 is the semi-cutaway of single powder column in Fig. 1；
Fig. 3 is along Fig. 2A-A sectional views；
Fig. 4 is the partial enlarged view of reverse anti-skid device in Fig. 1；
Fig. 5 installs and uses schematic diagram for self-expanding anchor pole.
Symbol description in figure：1- hinged ears, 2- sliding blocks, 3- long hex nuts, 4- fastening nuts, 5- elasticity water resisting protections
Set, 6- permeable holes, 7- double layer sleeve barrels, 8- seepy materials, 9- swelling agents, 10- covers, 11- supporting plates, 12- locking nuts, 13- pads
Piece, the 14- bodies of rod, 15- slideways, 16- quarter butts, 17- stocks, 18- self-expanding bodies.19- country rocks.20- relaxation zones, the tunnels 21-.
Specific implementation mode
Below in conjunction with drawings and examples, the present invention will be further described.
In conjunction with Fig. 1, self-expanding anchor pole of the present invention, including the body of rod 14, interval are mounted on the self-expanding body on the body of rod, are mounted on
The reverse anti-skid device of lever front end and the locked instrument positioned at body of rod rear end.
The self-expanding body includes powder column, powder column fixing device and powder column sealed waterproof device.
In conjunction with Fig. 1, Fig. 2 and Fig. 3, the outer diameter of the powder column is less than wall rock drill-hole 3mm, and powder column is by the annulus that is sleeved on the body of rod
Shape double layer sleeve barrel 7 and the swelling agent 9 in double layer sleeve barrel form.One end of double layer sleeve barrel is closed, and the other end has cover 10, cylinder
Lid can be screwed on the inner wall of double layer sleeve barrel.One group of (this reality is opened up respectively in an axial direction in the opposite both sides of the outer wall of double layer sleeve barrel
It is five to apply example) permeable hole 6.Swelling agent is by CaO, bentonite, hardened material, absolute ethyl alcohol, water-reducing agent and retarder mixing group
At the weight proportion of each ingredient is：CaO 65%, bentonite 2%, hardened material 15%, absolute ethyl alcohol 10%, water-reducing agent 1%,
Retarder 7%.There is the seepy material 8 being made of geotextiles or non-woven fabrics between swelling agent and double layer sleeve barrel.
The powder column fixing device includes positioned at powder column both ends, the fastening nut 4 and gasket that are threadedly coupled with the body of rod
13.Screwing fastening nut can make gasket clamp powder column, and powder column is fixed on the body of rod.
The powder column sealed waterproof device is the elastic water resisting protection set 5 being sleeved on outside powder column.
In conjunction with Fig. 4, the reverse anti-skid device includes the long hex nut 3 being threadedly coupled with lever front end and six by growing
Bar 17 and 16 one end of quarter butt are hinged the foldable metallic support of composition；(i.e. stock is another for the front end of six metallic supports
End) it is hinged respectively with the hinged ear 1 being welded on six planar outer walls of long hex nut；Rear end (the i.e. quarter butt of metallic support
The other end) there are the sliding block 2 hinged with it, the sliding block that can be opened in long hex nut plane along corresponding with the hinged ear, longitudinal
Slideway 15 on outer wall slides；Sliding block forward slip closes up (state when anchor pole is not used) to terminal metallic support, and sliding block is backward
Sliding metal stent open (anchor pole is placed in state in drilling).
In conjunction with Fig. 1, the locked instrument positioned at body of rod rear end include be sleeved on body of rod rear end supporting plate 11 and with the body of rod
The locking nut 12 that rear end is threadedly coupled, anchor pole using when supporting plate and country rock palisades can be made to compress by screwing locking nut.
What Fig. 5 showed self-expanding anchor pole installs and uses schematic diagram, wherein 14 be the body of rod of anchor pole, 18 be self-expanding body,
19 be country rock, and 20 be relaxation zone, and 21 be tunnel.
Claims (3)
1. a kind of self-expanding anchor pole, which is characterized in that including the body of rod (14), interval is mounted on the self-expanding body on the body of rod, installation
In the reverse anti-skid device of lever front end and locked instrument positioned at body of rod rear end；
The self-expanding body includes powder column, powder column fixing device and powder column sealed waterproof device；
The powder column includes the circular ring shape double layer sleeve barrel (7) being sleeved on the body of rod, and one end of double layer sleeve barrel is closed, and the other end has cover
(10), the outer wall of double layer sleeve barrel offers permeable hole (6), and swelling agent (9) is housed in double layer sleeve barrel, swelling agent and double layer sleeve barrel it
Between have the seepy material (8) with toughness；
The powder column fixing device includes positioned at powder column both ends, the fastening nut (4) and gasket that are threadedly coupled with the body of rod
(13)；Screwing fastening nut can make gasket clamp powder column, and powder column is fixed on the body of rod；
The powder column sealed waterproof device is the elastic water resisting protection set (5) being sleeved on outside powder column；
The reverse anti-skid device includes the long hex nut (3) being threadedly coupled with lever front end and six by stock (17) and short
Bar (16) one end is hinged the foldable metallic support of composition；The front end of six metallic supports respectively be welded on long hexagonal spiral shell
Hinged ear (1) on female six planar outer walls is hinged；The rear end of metallic support has the sliding block hinged with it (2), the sliding block can edge
Corresponding with the hinged ear, longitudinal slideway (15) sliding being opened on long hex nut planar outer walls；Sliding block forward slip arrives
Terminal metallic support closes up, and sliding block slides backward metallic support opening；
The locked instrument positioned at body of rod rear end includes the supporting plate (11) for being sleeved on body of rod rear end and the rear end screw thread with the body of rod
The locking nut (12) of connection, anchor pole using when supporting plate and country rock palisades can be made to compress by screwing locking nut；
The seepy material (8) is geotextiles or non-woven fabrics；
The swelling agent (9) is made of the mixing of CaO, bentonite, hardened material, absolute ethyl alcohol, water-reducing agent and retarder, each ingredient
Weight proportion be：CaO 65%, bentonite 2%, hardened material 15%, absolute ethyl alcohol 10%, water-reducing agent 1%, retarder
7%；
The outer diameter of the powder column is less than wall rock drill-hole 3mm.
2. the preparation method of self-expanding anchor pole described in claim 1, which is characterized in that include the following steps：
(1) powder column is made in the following order
1) using plastics or other high molecular materials as raw material, use casting, founding or 3D printing method be made length for 10~
15cm, the double layer sleeve barrel that wall thickness is 0.5~1mm and matched cover；The endoporus aperture of double layer sleeve barrel is more than shank diameter
The outer diameter of 2mm, double layer sleeve barrel are less than bore diameter 3mm；It is symmetrically opened up in the outer wall both sides of double layer sleeve barrel spaced permeable
Hole；
2) raw material is weighed according to the weight proportion of swelling agent ingredient；By CaO, bentonite, hardened material, the diminishing in raw material
Agent and retarder mixing, are stirring evenly and then adding into absolute ethyl alcohol and continue to stir, and wetting shape swelling agent is made；
3) seepy material is cut into the rectangular sheet that length is identical as double layer sleeve barrel length, width is equal to double layer sleeve barrel outer diameter perimeter
Zhuan , Stickers are attached to the inside outer wall of double layer sleeve barrel；Then manufactured wetting shape swelling agent in 2) is filled out by mechanical or manual mode
It is charged in double layer sleeve barrel, packed density reaches 1.8~2.1g/m3Afterwards, with cover encryption sealing encapsulation；
4) 3) double layer sleeve barrel of filling wetting shape swelling agent is placed on 40~50min under 70~80 DEG C of environment, makes internal second
Alcohol volatilizees, and powder column is made；
(2) body of rod, reverse anti-skid device, locked instrument, the fixing device of self-expanding body and the powder column for making anchor pole seal waterproof
Device
The body of rod of a diameter of 18~22mm is made of finish rolling deformed bar by the design length of anchor pole, the front end of the body of rod, after
Vehicle goes out screw thread respectively for end and the intermediate both ends for installing self-expanding body region additional；
The long hex nut for 60mm with lever front end screw-thread fit, length is made, in six planes of long hex nut outer wall
Front end be respectively welded hinged ear, corresponding each hinged ear axially opens up T shape sliding slots in each plane, is placed in sliding slot and T
The sliding block of shape sliding slot cooperation；Be 5mm with thickness, width 10mm, length be respectively 60mm and 45mm two flat-shaped stainless steels
Folding metallic support is hingedly made in bar one end, and the front end of metallic support is hinged with hinged ear, and rear end is hinged with sliding block, system
At reverse anti-skid device；
Be 15mm with thickness, supporting plate is made in the square steel plate that the length of side is 15mm, with the hot rolling six being threadedly coupled with body of rod rear end
Angle nut is assembled into the locked instrument of anchor pole as locking nut, spare；
Gasket is made with the circular ring shape steel disc that thickness is 5mm, internal diameter 24mm, outer diameter are 40mm, with self-expanding body both ends position
The hot rolling hex nut that the body of rod set is threadedly coupled forms the fixing device of self-expanding body as fastening nut；
The elastic water proof that internal diameter is slightly less than powder column outer diameter, length is slightly larger than self-expanding body length is made in the silica gel for being 1mm with thickness
Protective case is as powder column sealed waterproof device；
(3) assembling self-expanding body anchor pole
Reverse anti-skid device made of step (2) is mounted on to the front end of anchor rod body；By often save self-expanding body design length,
Take an appropriate number of powder column to connect, be sleeved on the setting position of the body of rod from front to back, at the same using the fastening nut of self-expanding body and
Gasket will often save self-expanding body and be separately fixed on the body of rod；Then manufactured elastic water resisting protection set is strutted, is sleeved on one by one certainly
The outside of expander carries out waterproof and moistureproof sealing to self-expanding body, completes the assembling of self-expanding body anchor pole.
3. the application method of self-expanding anchor pole described in claim 1, which is characterized in that elastic water resisting protection is covered release first,
Then anchor pole is placed in water immersion；Water enters the swollen of inside from the permeable hole on double layer sleeve barrel outer wall by permeability flexible material
In swollen dose, impregnate 6~8min after self-expanding anchor pole is taken out from water, by elastic water resisting protection set cover again after steeping from
On expander, then anchor pole is inserted into drilling；Wait for 30~50min, the swelling agent reaction expansion in powder column, turgor pressure will be double-deck
The outer wall of sleeve racks, and forms Anchor Agent, generates radial compression to borehole wall by elastic water resisting protection set, makes anchor rod body
It is coupled with borehole wall, eventually forms anchoring body；Supporting plate is through to the body of rod rear end for exposing drilling, screwed forward at this time
The locking nut being threadedly coupled with body of rod rear end makes supporting plate be close to the country rock around drilling, completes the installation of self-expanding anchor pole
It uses.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810594741.5A CN108756976A (en) | 2018-06-11 | 2018-06-11 | A kind of self-expanding anchor pole and its preparation and application |
| PCT/CN2019/086358 WO2019237859A1 (en) | 2018-06-11 | 2019-05-10 | Self-expanding anchor bolt and preparation method and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810594741.5A CN108756976A (en) | 2018-06-11 | 2018-06-11 | A kind of self-expanding anchor pole and its preparation and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108756976A true CN108756976A (en) | 2018-11-06 |
Family
ID=64021316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810594741.5A Pending CN108756976A (en) | 2018-06-11 | 2018-06-11 | A kind of self-expanding anchor pole and its preparation and application |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108756976A (en) |
| WO (1) | WO2019237859A1 (en) |
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| WO2019237859A1 (en) * | 2018-06-11 | 2019-12-19 | 东北大学 | Self-expanding anchor bolt and preparation method and use method thereof |
| CN112664251A (en) * | 2020-12-30 | 2021-04-16 | 开滦（集团）有限责任公司 | Hydraulic expansion type grouting anchor rod and anchoring method |
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| CN112663606A (en) * | 2020-12-23 | 2021-04-16 | 江苏东合南岩土科技股份有限公司 | Construction method of concrete expanded head prestress anti-pulling anchor rod |
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Application publication date: 20181106 |