CN108914934A - One kind is exempted to recycle prestressed anchor and preparation method thereof - Google Patents
One kind is exempted to recycle prestressed anchor and preparation method thereof Download PDFInfo
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- CN108914934A CN108914934A CN201811022599.3A CN201811022599A CN108914934A CN 108914934 A CN108914934 A CN 108914934A CN 201811022599 A CN201811022599 A CN 201811022599A CN 108914934 A CN108914934 A CN 108914934A
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- anchor
- recycle
- rod body
- adhesive liquid
- anchor rod
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000004064 recycling Methods 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims description 51
- 239000011347 resin Substances 0.000 claims description 51
- 239000000835 fiber Substances 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 34
- 239000000853 adhesive Substances 0.000 claims description 32
- 230000001070 adhesive effect Effects 0.000 claims description 32
- 239000003292 glue Substances 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 229920000742 Cotton Polymers 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 8
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 229920002748 Basalt fiber Polymers 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 description 1
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 description 1
- 101710107464 Probable pyruvate, phosphate dikinase regulatory protein, chloroplastic Proteins 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- 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
- 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
-
- 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
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
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)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Exempt to recycle prestressed anchor and preparation method thereof the embodiment of the invention discloses one kind, the anchor pole includes anchor rod body and end casing, the end casing fixing sleeve is located at the top of anchor rod body, the anchor rod body surface is formed with screw thread, the anchor rod body is by FRP material by drawing quick pushing manipulation to be made, anchor rod body intensity reaches 800-4500Mpa, anchor force can reach 200-600kN, it can be used for deep basal pit, since FRP material enbrittles, there is lesser shear strength simultaneously, it can be thrust by pile crown, drilled machine-cut is disconnected or is dug by digging machine disconnected, other unit land used operation is not influenced, therefore anchor pole is without recycling, greatly reduce the cost of deep-foundation pit engineering.
Description
Technical field
The present invention relates to building material technical fields, and in particular to one kind is exempted to recycle prestressed anchor and preparation method thereof.
Background technique
Skyscraper, subway or other construction need deep pit excavation when building, and margin of foundation pit displacement request is necessary
Less than 2cm, otherwise surrounding ground can deform, and the road surface and house of surrounding will appear crack, and solution usually exists
First one is intensively covered with friction pile next to a ground around foundation pit, then excavates again, friction pile is generally by reinforced concrete pile
Or steel stake composition, top require displacement to be less than 2cm, but only be unable to satisfy requirement by friction pile, it is also necessary to answering in advance
Power bolt anchorage, 15 to 60 meters of prestressed anchor pole length, inclination angle 15 to 30 spend, generally all from underground reached property line with
Outside, the tension of receiving reaches 200-600kN.
Steel strand wires are generallyd use as prestressed anchor at present, but the steel anchor pole for remaining in underground will affect other unit
Underground job when land used needs to extract the pre- of reinforcing when deep basal pit operation is completed in order to not influence other unit land used
Stress anchor pole, usually from foreign procurement " recoverable anchor rod ", dosage is huge for unit in charge of construction thus, and expensive is recycled
Metallic rod has been of little use, and current recoverable anchor rod gos deep into the distal end on stratum at it, is filled using a mechanical self-latching
It sets, forms one about 0.5 meter or so of steel end, steel strand wires are inserted, and are mechanically locked, cement slurry shape when operation
At subsphaeroidal mixed mud block, only bond this mechanical caging end, rest part is isolated by plastic layers, and when recycling is reversed
The steel strand wires that have unloaded and unlock, and the extraction inside plastic partition absciss layer, plastic partition absciss layer stay in stratum.In addition to price is high
Expensive, there is also two drawbacks for this technology：First, the situation for often having unlock to fail, steel strand wires not can be recycled at this time, remain on
In bottom, influences the probing of other land users, piling or excavate；Second, steel strand anchor rod is smoothly recycled even if unlocking successfully,
Still there is the self-locking end an of steel to remain in stratum, adverse effect may be caused to the operation of other land users.Mesh
Preceding deep basal pit operation relies primarily on the recoverable anchor rod of external import, and the rate of recovery only has 70%.
The embodiment of the present invention proposes one kind and exempts to recycle prestressed anchor and preparation method thereof, which uses fiber reinforcement
Composite material (Fiber ReinforcedPolymer, abbreviation FRP) by draw twine technique be made, FRP material be glass fibre,
Carbon fiber, boron fibre, aramid fiber, alumina fibre and silicon carbide fibre etc. are used as reinforcing material, make matrix with synthetic resin
A kind of high-strength composite material of structure light wt of material, the anchor rod body intensity as made from FRP material reach 800-4500Mpa,
Anchor force can reach 200-600kN, can be used for deep basal pit, since FRP material enbrittles, while have lesser anti-shearing strong
Degree, can be thrust, drilled machine-cut is disconnected or it is disconnected to be dug by digging machine by pile crown, not influence other unit land used operation, therefore anchor pole is not necessarily to
Recycling, greatly reduces the cost of deep-foundation pit engineering.
Summary of the invention
The one kind that is designed to provide of the embodiment of the present invention is exempted to recycle prestressed anchor and preparation method thereof, existing to solve
The recoverable prestressed anchor pole having is expensive, the rate of recovery is low and the self-locking steel end shadow there are still residual in the earth formation
The problem of ringing other land user's operations.
To achieve the above object, the embodiment of the present invention provides one kind and exempts to recycle prestressed anchor：The anchor pole includes anchor pole
The body of rod and end casing, the end casing fixing sleeve are located at the top of anchor rod body, and the anchor rod body surface is formed with spiral shell
Line, the anchor rod body is by FRP material by drawing quick pushing manipulation to be made.
Preferably, the anchor rod body surface sand-blasting.
Preferably, the end casing is seamless steel casing matched with steel anchorage.
Preferably, viscous by the cold setting resin glue layer containing curing agent between the end casing and anchor rod body
It connects.
Preferably, the fiber in the FRP material is in high strength glass fiber, basalt fibre or carbon fiber
It is one or more of.
Preferably, the difference of the end casing inner diameter and anchor rod body outer diameter is greater than or equal to 1-6mm.
The embodiment of the present invention also proposed a kind of preparation method for exempting to recycle prestressed anchor, and twining technique preparation by drawing should
Exempt to recycle prestressed anchor, the preparation method comprises the following steps：
1) resin adhesive liquid is prepared, includes resin matrix and curing agent in resin adhesive liquid, by the resin adhesive liquid containing curing agent
It is stored in glue groove；
2) fibre bundle is drawn under the traction of pulling force tracked machine from spindle, around pressure roller and in glue after the first thread board
Resin adhesive liquid is impregnated in liquid bath；
3) fibre bundle of resin adhesive liquid is impregnated under the action of the second thread board, and a part is from internal for hollow central tube
Arrival end enter inside central tube, and be drawn out by the outlet end of central tube, another part is then led by the periphery of central tube
Lead to the outlet end of central tube, the arrival end of central tube is set as outer diameter from large to small tubaeform, is impregnated with the fibre of resin adhesive liquid
Dimension beam is extruded under the action of the bellmouth entrance end that outer diameter is gradually reduced and squeezes out most of glue, so that in fibre bundle
Resin adhesive liquid content significantly reduces, and the content of fibre bundle greatly increases relatively, and the resin adhesive liquid being extruded is back to glue groove
Interior recycling；
4) it is drawn from the fibre bundle come out inside central tube by squeezing and by central tube periphery and what is arrived is impregnated with resin
The fibre bundle of glue collects parallel at the outlet end of central tube, is at this time tightly wound around cotton yarn by wind parallel
The outside of fibre bundle is extruded contraction by the part that cotton yarn is wound, and the part not being wound is raised and on the surface of fibre bundle
Screw thread is formed, is acted on by winding, the resin adhesive liquid in peripheral fibres beam is largely extruded, the resin adhesive liquid reflux being extruded
It is reused in glue groove；
5) fibre bundle for being wound with cotton yarn is drawn to online baking oven internal heating curing and forms the threaded bar in surface, connect
By disconnector release the cotton yarn of Surface of Rod Bar is removed, bar continues after being towed to certain length, is existed by synchronous marching
Scroll saw cuts off bar, obtains the anchor rod body of specific length；
6) termination point casing pipe sleeve is located to the end of anchor rod body, by containing curing agent between end casing and anchor rod body
Cold setting resin glue layer solidification bonding obtain this exempt from recycle prestressed anchor.
Preferably, in the step 1), resin matrix is epoxy resin or polyurethane glue.
Preferably, in the step 5), solidification temperature is 110-220 DEG C.
The embodiment of the present invention has the following advantages that：
The embodiment of the present invention proposes one kind and exempts to recycle prestressed anchor and preparation method thereof, which uses FRP material
It twines technique by drawing to be made, FRP material enbrittles, while having lesser shear strength, protrudes into stratum in anchor pole and enters
When other than property line, can be thrust by pile crown, drilled machine-cut is disconnected or it is disconnected to be dug by digging machine, do not influence other unit land used operation,
Without iron structure, outer end is provided with end casing for its distal end for protruding into stratum, and when construction can be had using ordinary steel anchor to pre-
Stress anchor pole implements tensioning, after tensioning, is had by ordinary steel anchor and realizes mechanical self-latching, without the need for the dedicated of FRP clamping
Anchorage, for anchor pole without recycling, working procedure is simple, can greatly reduce construction cost and the duration of deep-foundation pit engineering, anchor rod body
There is screw thread on surface, and fixation is bonded when being solidified convenient for distal end by slip casting, and anchor rod body intensity reaches 800-4500Mpa, and anchor force can
Reach 200-600kN, can be effectively used for deep basal pit, while the anchor pole density is small, it is light-weight, facilitate manpower transport and placement.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for exempting to recycle prestressed anchor that the embodiment of the present invention 1 provides.
Fig. 2 is a kind of preparation process flow schematic diagram for exempting to recycle prestressed anchor that the embodiment of the present invention 1 provides.
Fig. 3 is a kind of installation process schematic diagram for exempting to recycle prestressed anchor that the embodiment of the present invention 1 provides.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1
As shown in Figure 1, one kind that the present embodiment proposes is exempted to recycle prestressed anchor 1, including anchor rod body 11 and termination point casing
Pipe 12, the fixed top for being set in anchor rod body 11 of end casing 12, anchor rod body 11 are made by FRP material by drawing quick pushing manipulation,
End casing 12 is seamless steel casing matched with steel anchorage, and the difference of 11 outer diameter of 12 internal diameter of end casing and anchor rod body is greater than
Or it is equal to 1-6mm, it is viscous by the cold setting resin glue layer 13 containing curing agent between end casing 12 and anchor rod body 11
It connects, the normal-temperature curing epoxy resin adhesive liquid containing curing agent may be selected.
Fiber in FRP material is selected from high strength glass fiber (GFRP), basalt fibre (BFRP) or carbon fiber
One or more of (CFRP), FRP prestressed anchor, Young's modulus does not influence to use, and only has higher want to tensile strength
It asks, different fibers usually its Young's modulus is in 50-200GPa, for example high strength glass fiber Young's modulus is 50-60GPa,
The Young's modulus of basalt fibre is 90-110GPa, the Young's modulus of carbon fiber about 200GPa, draws the Young's modulus for twining finished product logical
Often between 40-180GPa, since FRP material enbrittles, and there is lesser shear strength, can be thrust by pile crown,
Drilled machine-cut is disconnected or disconnected by digging machine digging, therefore the FRP material anchor pole for remaining on underground will not interfere the engineering on adjacent plot to make
Industry greatly reduces construction cost and the construction period of deep-foundation pit engineering without recycling.
Anti-shear ability (i.e. breakout capacity) between the end casing 12 and anchor rod body 11 of the present embodiment is larger, can hold
By thousand Ns of pulling capacity of 200-600, can be had using ordinary steel anchor to prestressing force when the effect of end casing 12 is to construct
Anchor pole implements tensioning, after tensioning, is had by ordinary steel anchor and realizes mechanical self-latching, due to the brittleness of FRP material, if do not had
End casing 12, general nonmetallic anchorage can not anchor, will lead to the body of rod and slip from anchorage, and can be pressed from both sides with steel anchorage
Broken rod end, setting end casing 12 can effectively avoid these problems, and without using the Special ground tackle of FRP clamping.
11 surface of anchor rod body is formed with screw thread 14, after the grout cures of perfusion, can form biggish bond to end
Power is conducive to apply prestressing force, and screw thread 14 can be deep thread, be also possible to shallow thread, and shallow thread can add surface sand-blasting, adopt
With surface sand-blasting technique, surface can be made to bond characteristic with good.
One kind of the present embodiment exempts from recycling prestressed anchor and twines technique preparation, preparation process flow such as Fig. 2 institute by drawing
Show, preparation method includes the following steps：
1) resin adhesive liquid is prepared, includes other additives such as resin matrix, curing agent and filler, resin in resin adhesive liquid
Matrix can be epoxy resin or polyurethane, and if fruit fiber uses basalt fibre or carbon fiber, polyester is can be used in resin, typical
Formula is (weight ratio)：Resin matrix 95.5-98.5%, curing agent 1-3%, additive 0.5-1.5% will contain curing agent
Resin adhesive liquid is stored in glue groove 201；
2) fibre bundle 203 under the traction of pulling force tracked machine 211 from spindle 202 draw, after the first thread board 204 around
It crosses pressure roller 205 and is impregnated with resin adhesive liquid in glue groove 201；
3) be impregnated with the fibre bundle of resin adhesive liquid under the action of the second thread board 206, a part from inside be it is hollow in
The arrival end of heart pipe 207 enters inside central tube, and is drawn out by the outlet end of central tube 207, and another part is then by central tube
207 periphery is towed to the outlet end of central tube 207, and the arrival end of central tube 207 is set as the loudspeaker of outer diameter from large to small
Shape, the fibre bundle for being impregnated with resin adhesive liquid are extruded under the action of the bellmouth entrance end that outer diameter is gradually reduced and squeeze out major part
Glue, so that the resin adhesive liquid content in fibre bundle significantly reduces, and the content of fibre bundle greatly increases relatively, the tree being extruded
Rouge glue is back to recycling in glue groove 201, and pultrusion rate is different and different according to resin and curing agent, is with polyester
Example, usually may be set to be preferred in 0.5-2m/min with 1m/min, draw the drawing force for twining production line according to the anchor pole drawn
Diameter determines that then pulling tension requirements are big greatly for diameter, the pull-out speed being subject to needed for guaranteeing；
4) leaching for passing through the fibre bundle squeezed with being drawn by 207 periphery of central tube and being arrived come out inside central tube 207
The fibre bundle of saturating resin adhesive liquid collects parallel at the outlet end of central tube 207, passes through wind 208 at this time for cotton yarn tightly
Be wrapped in the outside of parallel fibre bundle, contractions be extruded by the part that cotton yarn is wound, and the part that is not wound it is raised and
The surface of fibre bundle forms screw thread, is acted on by winding, the resin adhesive liquid in peripheral fibres beam is largely extruded, and is extruded
Resin adhesive liquid is back to recycling in glue groove, while exempting to recycle fiber and paste resin in prestressed anchor obtained by guarantee
The weight percent of material is respectively：Fiber 75-87%, resin adhesive liquid 13-25%；
5) fibre bundle for being wound with cotton yarn is drawn to being heating and curing to form surface at 110-220 DEG C in online baking oven 209
Threaded bar, drawing twine solidification temperature according to resin specific requirement used, depending on resin, curing agent operation instruction, with
For polyester, solidification temperature is 110-160 degrees Celsius, is preferred with 155 degrees Celsius, then passes through disconnector release 210 for Surface of Rod Bar
Cotton yarn remove, bar continues after being towed to certain length, cuts off bar by the online saw 212 of synchronous marching, obtains
The anchor rod body 11 of specific length；
6) end casing 12 is set in the end of anchor rod body 11, by containing between end casing 12 and anchor rod body 11
There is the solidification bonding of cold setting resin glue layer 13 of curing agent to obtain this to exempt to recycle prestressed anchor 1.
The installation process for exempting to recycle prestressed anchor 1 of the present embodiment is as shown in figure 3, be specially：First in deep basal pit 31
Inside needing to dispose nearly laterally past 32 internal drilling of stratum of drilling machine of the place of anchor pole, borer drill rod system casing has recirculated water or mud,
Drilling cuttings in drilling 33 is taken out of, after reaching predetermined depth, drilling rod is pulled out, recycling prestressed anchor 1 will be exempted from and be put into drilling 33, with
Exempt to recycle prestressed anchor 1 and show a Grouting Pipe, if stratum is loosely, anchor pole can be put into drilling rod, is pushed into pre-
Depthkeeping degree, then rod pulling section by section, the end casing for exempting to recycle prestressed anchor 1 is exposed in outside, and distal end stretches to ground
In layer, 2 to 3 anchor poles are set in general each drilling, guarantee that single anchor rod diameter can be made as far as possible while total tension tonnage
Small (6-10mm), the smaller disk that can be coiled into diameter 1.5m-2.5m of diameter, convenient transportation, since FRP material has preferably
Elasticity, the disk-shaped product of winding can stretch naturally after release；High pressure cement is injected by Grouting Pipe using secondary grouting technology
Slurry, after injecting a certain number of cement slurries, pauses 5 to 10 minutes, then proceedes to slip casting, and the cement slurry quantity that is previously implanted is stopped
Immediately between, later period injection rate, reference can be made to prestressed anchor is placed, slurry injection technique specification, the purpose for a few minutes of pausing is to allow
The part of pre-pouring grout is precipitated in advance, forms an outer boundary, and later period slip casting will push this boundary, forms end cement slurry
Otherwise one subsphaeroidal block can form filter bleed-through road in the earth formation, ad infinitum receive cement slurry；(about to grout cures
14-28 days), prestressed stretch-draw is carried out, when tensioning, first cushion block and self-locking anchorage are penetrated in end sleeve end, then by punching thousand
Jin top cover enters, and has cushion block outside punching jack, is another same anchorage (claiming work anchor) outside cushion block, and jack is by work anchor
Outside pushing tow, self-locking anchorage are in free state, and end casing is pulled outwardly, and anchor pole generates preset tension (200-600kN), this
When lifting jack unloading reset, work anchor relaxation unloads work anchor, cushion block and punching jack and from break adrift automatically lock, will
Portion tip casing (together with internal FRP anchor rod body) cutting from other than break adrift is removed, and distal end does not have iron structure, no
Other units in charge of construction can be had an impact.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (9)
1. one kind is exempted to recycle prestressed anchor, which is characterized in that the anchor pole includes anchor rod body and end casing, the end
The fixed top for being set in anchor rod body of casing, the anchor rod body surface are formed with screw thread, and the anchor rod body is by FRP material
By drawing quick pushing manipulation to be made.
2. one kind according to claim 1 is exempted to recycle prestressed anchor, which is characterized in that the anchor rod body surface spray
Sand.
3. one kind according to claim 1 is exempted to recycle prestressed anchor, which is characterized in that the end casing is and steel
The matched seamless steel casing of anchorage.
4. one kind according to claim 1 is exempted to recycle prestressed anchor, which is characterized in that the end casing and anchor pole bar
It is bonded between body by the cold setting resin glue layer containing curing agent.
5. one kind according to claim 1 is exempted to recycle prestressed anchor, which is characterized in that the fiber in the FRP material
Selected from one or more of high strength glass fiber, basalt fibre or carbon fiber.
6. one kind according to claim 1 is exempted to recycle prestressed anchor, which is characterized in that the end casing inner diameter and anchor
The difference of club shaft outer diameter is greater than or equal to 1-6mm.
7. any a kind of preparation method for exempting to recycle prestressed anchor in -6 according to claim 1, which is characterized in that logical
Cross drawing twine technique prepare this exempt from recycle prestressed anchor, the preparation method comprises the following steps：
1) resin adhesive liquid is prepared, includes resin matrix and curing agent in resin adhesive liquid, the resin adhesive liquid containing curing agent is stored
In in glue groove；
2) fibre bundle is drawn under the traction of pulling force tracked machine from spindle, around pressure roller and in glue groove after the first thread board
In be impregnated with resin adhesive liquid；
3) fibre bundle of resin adhesive liquid is impregnated under the action of the second thread board, a part entering for hollow central tube from inside
Mouth end enters inside central tube, and is drawn out by the outlet end of central tube, and another part is then towed to by the periphery of central tube
The outlet end of central tube, the arrival end of central tube are set as outer diameter from large to small tubaeform, are impregnated with the fibre bundle of resin adhesive liquid
It is extruded under the action of the bellmouth entrance end that outer diameter is gradually reduced and squeezes out most of glue, so that the resin in fibre bundle
Glue content significantly reduces, and the content of fibre bundle greatly increases relatively, and the resin adhesive liquid being extruded is back to weight in glue groove
It is multiple to utilize；
4) it is drawn from the fibre bundle come out inside central tube by squeezing and by central tube periphery and what is arrived is impregnated with resin adhesive liquid
Fibre bundle collect at the outlet end of central tube parallel, cotton yarn is tightly wound around by wind by parallel fiber at this time
The outside of beam is extruded contraction by the part that cotton yarn is wound, and the part not being wound is raised and is formed on the surface of fibre bundle
Screw thread is acted on by winding, and the resin adhesive liquid in peripheral fibres beam is largely extruded, and the resin adhesive liquid being extruded is back to glue
Recycling in liquid bath；
5) fibre bundle for being wound with cotton yarn is drawn to online baking oven internal heating curing and forms the threaded bar in surface, then led to
It crosses disconnector release to remove the cotton yarn of Surface of Rod Bar, bar continues after being towed to certain length, by synchronous marching in scroll saw
Son cutting bar, obtains the anchor rod body of specific length；
6) termination point casing pipe sleeve is located to the end of anchor rod body, by containing the normal of curing agent between end casing and anchor rod body
Warm solidified resin glue layer solidification bonding obtains this and exempts to recycle prestressed anchor.
8. a kind of preparation method for exempting to recycle prestressed anchor according to claim 7, which is characterized in that the step
1) in, resin matrix is epoxy resin or polyurethane glue.
9. a kind of preparation method for exempting to recycle prestressed anchor according to claim 7, which is characterized in that the step
5) in, solidification temperature is 110-220 DEG C.
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| CN201811022599.3A CN108914934A (en) | 2018-09-03 | 2018-09-03 | One kind is exempted to recycle prestressed anchor and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811022599.3A CN108914934A (en) | 2018-09-03 | 2018-09-03 | One kind is exempted to recycle prestressed anchor and preparation method thereof |
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| CN201811022599.3A Pending CN108914934A (en) | 2018-09-03 | 2018-09-03 | One kind is exempted to recycle prestressed anchor and preparation method thereof |
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| CN110593903A (en) * | 2019-09-27 | 2019-12-20 | 中国矿业大学 | Novel grouting anchor cable supporting method and grouting anchor cable |
| CN112622308A (en) * | 2020-12-01 | 2021-04-09 | 北玻院(滕州)复合材料有限公司 | Carbon fiber composite material arm section and preparation method thereof |
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