CN106351219B - A kind of telescopic Recyclable anchor rope - Google Patents
A kind of telescopic Recyclable anchor rope Download PDFInfo
- Publication number
- CN106351219B CN106351219B CN201610758531.6A CN201610758531A CN106351219B CN 106351219 B CN106351219 B CN 106351219B CN 201610758531 A CN201610758531 A CN 201610758531A CN 106351219 B CN106351219 B CN 106351219B
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- strand wires
- steel
- steel strand
- anchor
- bottom end
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 159
- 239000010959 steel Substances 0.000 claims abstract description 159
- 238000004064 recycling Methods 0.000 claims abstract description 8
- 238000011084 recovery Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000000178 monomer Substances 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 13
- 238000013461 design Methods 0.000 claims description 13
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 10
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000003999 initiator Substances 0.000 claims description 9
- -1 polyoxyethylene Polymers 0.000 claims description 9
- 238000007569 slipcasting Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 6
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 229940079827 sodium hydrogen sulfite Drugs 0.000 claims description 6
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 3
- JPAOMENBKRZQDR-UHFFFAOYSA-N CC=CC.[Na] Chemical compound CC=CC.[Na] JPAOMENBKRZQDR-UHFFFAOYSA-N 0.000 claims description 3
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 235000019394 potassium persulphate Nutrition 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 210000002435 tendon Anatomy 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002787 reinforcement Effects 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
- E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable
-
- 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
-
- 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
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Paleontology (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to engineering support technologies, it is desirable to provide one kind has recovering effect, and does not reduce the telescopic Recyclable anchor rope of anchor force.Telescopic Recyclable anchor rope, including steel strand wires, protecting tube, anchor plate, pressure rings, steel bushing；The pressure rings are made of spring wire, and pressure rings are located at outside steel strand wires bottom end, and steel bushing is located at outside pressure rings, and are fixed steel bushing and pressure rings on steel strand wires by pressure apparatus；The steel bushing is connect with anchor plate；The steel wire at center is truncated in advance in bottom end vicinity for the steel strand wires, and truncation position is located at steel bushing close to the end face outside of steel strand wires bottom end.Since the steel strand wires at center are straight, so be easy to be extracted by jack, it is simple to operate.After core wire is pulled out, steel strand wires can be extracted into recycling so that hoist engine, artificial etc. are more easily low.And it is suitable for the recovery operation of narrow space, there is biggish operability, economy and obvious environment benefit.
Description
Technical field
The present invention relates to engineering support technologies, and in particular to a kind of Recyclable anchor rope.
Background technique
Anchor cable is widely used in the engineering reinforcements such as coal mining, building foundation pit and slope retaining, especially each in city
It is widely used in the supporting of kind underground engineering.With the development of underground engineering construction, especially subway, market place builet below the ground, underground
The development of pipe gallery, a large amount of provisional cable bolting hinder the utilization of the underground space, have surmounted original and have been built by supporting
Property line, hamper the construction of other adjacent architectural engineerings, become hypogee rubbish.In many developed countries, anchor cable
Support pattern has been prohibited from using；It is also had begun in some developed regions in China and forbids using anchor cable as branch in megalopolis
Shield mode.
In order to allow this support pattern to continue to play a role in construction, must just improve its construction technology, prevent its at
For hypogee rubbish, the utilization of the underground space is interfered.Also occurs the technology of many Recyclable anchor ropes in the prior art, still
More complicated recyclable structure will generally be used.Such as what is had will be unlocked by rotation steel strand wires, but steel strand wires itself are only
It is that tensile capacity is strong, but stiffness by itself is low, rotation unlock is difficult to realize at all in practice；What is had will be by anchoring section end complexity
Elastic unlocking structure realize unlock, but due to grouting pressure, corrosion the problems such as presence, it is also difficult to realize, also increase
Difficulty of construction.
204626421 U of CN discloses a kind of relatively simple Recyclable anchor rope technology.He is exactly attached in anchoring section inner end
Preparatory cut-in groove on close steel strand wires when recycling, pulls steel strand wires by jack, steel strand wires are broken by groove outward
Split the recycling for realizing steel strand wires.It should say, this is that our structures simple so far are most simple, and the anchor cable for operating most convenient returns
Debit's formula, engineering application value are higher.But there is also this apparent defects for the technology, that is, waste of material problem.It is whole
For a steel strand wires by after cut-in groove, the external force that can be born is lower than the design stress-bearing capability of complete steel strand wires, is equivalent to steel strand
The waste of wire material.This be also in engineering it is not cost-effective, will cause very big cost waste.
Summary of the invention
The object of the present invention is to provide one kind to have recovering effect, and does not reduce the telescopic Recyclable anchor rope of anchor force；
It to reduce presence of the anchor cable in the underground space, prevents anchor cable from becoming hypogee rubbish, prevents gib from surmounting building red
The telescopic Recyclable anchor rope of line.
For achieving the above object, the technical scheme adopted by the invention is that: a kind of telescopic Recyclable anchor rope, including
Steel strand wires, protecting tube, anchor plate, pressure rings, steel bushing；The pressure rings are made of spring wire, and pressure rings are located at steel strand wires bottom
End is external, and steel bushing is located at outside pressure rings, and is fixed steel bushing and pressure rings on steel strand wires by pressure apparatus；Institute
Steel bushing is stated to connect with anchor plate；The steel wire at center is truncated in advance in bottom end vicinity for the steel strand wires, and truncation position is located at
In steel bushing or steel bushing is near the end of steel strand wires bottom end.
Preferably, the truncation positional distance steel strand wires bottom end 3cm or more, and it is located at steel bushing close to steel strand wires bottom end
End face outside.
Preferably, the truncation positional distance steel strand wires 3~30cm of bottom end.
Preferably, the truncation positional distance steel strand wires 4~8cm of bottom end.
Preferably, the steel strand wires are 7 steel strand wires.
Correspondingly, construction and the recovery method of a kind of anchor cable, include the following steps:
1) it, punches: processing anchor hole by design requirement；
2), anchor cable makes: the steel strand wires of anchor cable use bare wire, and additional protecting tube twists steel by bottom end vicinity in steel strand wires
Line dispersion is split into individual wire, is being truncated by the position 4~30cm of close end to by the steel wire at steel strand wires center；Steel wire is restored again
Bunchy becomes steel strand wires, then goes here and there upper anchor plate, puts on pressure rings and steel bushing, with pressure apparatus by steel bushing and pressure rings
It is fixed on steel strand wires, and guarantees that the truncation position of steel wire is placed exactly in steel bushing or steel bushing is close to steel strand wires bottom end
End near；Then steel bushing and anchor plate are fixed；Band anchor plate one end of anchor cable is put into anchor hole again, Grouting Pipe is same
Anchor cable is put into together；
3), slip casting: from anchor cable hole rising pouring concrete grout, after slurries return out from aperture, sealing pressurization, after reaching design pressure
Stop slip casting；
4), tensioning: when injecting cement paste reaches design strength, to anchor cable carry out tensioning, after tensioning to design value, to anchor cable outside
End is locked；
5), anchor cable recycles: individually being extracted the steel wire at the steel strand wires center that bottom end is truncated with single tendon stretch jack；Again
Entire steel strand wires are extracted and are recycled.
Preferably, during the slip casting, concrete slurry used forms in parts by weight are as follows: sandstone particle 4~5
Part, 1 part of cement, 0.1~0.2 part of swelling agent, 1~2 part of quartz sand, water and water-reducing agent, water-reducing agent dosage are 0.8~1kg/m3,
The sandstone particle partial size is in 0.3~0.5cm；
The water-reducing agent be by:
The methyl alkenyl polyoxyethylene that the 0.13mol degree of polymerization is 30~60；
0.32mol acrylic acid；
0.01mol methylpropene sodium sulfonate；
0.12mol acrylamide；
0.05mol styrene；
It is made in the steps below:
A, 70% acrylic acid and other raw materials in addition to methyl alkenyl polyoxyethylene are dissolved in deionized water, are stirred
Uniformly, minor comonomer solution for later use is obtained；
B, sodium hydrogensulfite is dissolved in deionized water, is stirred evenly, obtain chain-transferring agent solution for later use；Sodium hydrogensulfite is used
Amount reacts the 0.3~0.4% of total monomer weight by weight；
C, the methyl alkenyl polyoxyethylene that the degree of polymerization is 30~60 is put into reaction vessel with deionized water and is dissolved by heating；
Until completely dissolved, the acrylic acid and initiator of surplus is added, continues stirring heating, rises to 45 ± 2 DEG C to temperature, start to synchronize
Minor comonomer solution and chain-transferring agent solution is at the uniform velocity added dropwise, 8h is dripped off, then proceed to 3~4h of insulation reaction, then be cooled to 40 DEG C with
Under, be added sodium hydroxide solution regulation system pH value between 7~8 to get；
The initiator be sodium sulphate or potassium peroxydisulfate, initiator amount react by weight total monomer weight 1~
1.4%；
The total dosage of the deionized water is 1 times of monomer gross mass；Step a dosage is 0.3 times of monomer gross mass, step
Rapid b dosage is 0.1 times of monomer gross mass, and step c dosage is 0.6 times of monomer gross mass.
In technical solution of the present invention, pressure rings are made of spring wire, and spring wire rigidity is big, can be snapped into the steel of steel strand wires
Between silk, then spring wire and steel strand wires are integrally squeezed and deformed by steel sleeve, and three forms and is firmly fixed.Due to the steel at center
Twisted wire is straight, so be easy to be extracted by jack, it is simple to operate.After core wire is pulled out, entire steel strand wires are thick
Carefully attenuate and fluff, the cooperation no longer close and firm of steel strand wires bottom end and pressure rings and steel bushing, pressure rings and steel bushing twist steel
Line is not with fixed function；Steel strand wires can be extracted into recycling so that hoist engine, artificial etc. are more easily low.The present invention changes anchor
The connection type of rope bottom end steel strand wires and anchor plate, neither reduction anchor force, also do not waste bar material, but can be convenient into
The recycling of row anchor cable；It is convenient for being widely popularized universal use with stronger Popularizing of A.And it is suitable for the recovery operation of narrow space, tool
There are biggish operability, economy and obvious environment benefit.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is use state of the invention with reference to figure.
Specific embodiment
It is as shown in Figure 1, a kind of telescopic Recyclable anchor rope, including steel strand wires 1, protecting tube, anchor plate 4, pressure rings 2,
Steel bushing 3.The pressure rings 2 are made of spring wire, and pressure rings 2 are located at outside 1 bottom end of steel strand wires, and steel bushing 3 is located at pressure rings 2
Outside, and be fixed steel bushing 3 and pressure rings 2 on steel strand wires 1 by pressure apparatus 6；The steel bushing 3 and anchor plate 4
Connection.The steel wire 11 at center is truncated in advance in bottom end vicinity for the steel strand wires 1, and truncation position is located in steel bushing 3 or steel
Sleeve is near the end of steel strand wires bottom end.When truncation position is located in steel bushing 3 close to 4 one end of anchor plate, in extraction
Heart steel wire is easiest to；But the degree of the whole Shu Biansong of steel strand wires 1 is smaller, but as long as the same using equipment such as hoist engine or jack
It may insure that recycling is smooth.When truncation position is located at steel sleeve 3 close to 1 bottom end of steel strand wires, the anchor force damage of entire steel strand wires 1
It loses small；Because core wire deformation when equal fixed with pressure rings 2 is minimum, can easily be extracted out still or with jack,
Using effect is best.
Preferably: truncation position is located at steel sleeve 3 close to the end face outside of 1 bottom end of steel strand wires.The truncation position
Distance apart from 1 bottom end of steel strand wires, distance of the bottom end apart from 1 bottom end of steel strand wires of namely steel bushing 3 are set, with N table in figure
Show, the value of N is in 3cm or more.Preferably 3~30cm, more preferably 4~8cm.The steel strand wires 1 usually select 7 steel to twist
Line.
Correspondingly, construction and the recovery method of a kind of anchor cable, include the following steps:
1) it, punches: processing anchor hole by design requirement；
2), anchor cable makes: the steel strand wires 1 of anchor cable use bare wire, and additional protecting tube leans on bottom end vicinity by steel in steel strand wires 1
The dispersion of twisted wire 1 is split into individual wire, is truncated by the position 4~8cm of close end to by the steel wire 11 at 1 center of steel strand wires；Again by steel
Silk restores bunchy, becomes steel strand wires 1, then goes here and there upper anchor plate 4, puts on pressure rings 2 and steel bushing 3, with pressure apparatus 6 by steel bushing
Cylinder 3 and pressure rings 2 are fixed on steel strand wires 1, and guarantee that the truncation position of steel wire is placed exactly in steel bushing 3 close to steel strand wires
1 bottom end side；Then steel bushing 3 and anchor plate 4 is fixed；Band 4 one end of anchor plate of anchor cable is put into anchor hole again, Grouting Pipe
It is put into together with anchor cable；
3), slip casting: from anchor cable hole rising pouring concrete grout, after slurries return out from aperture, sealing pressurization, after reaching design pressure
Stop slip casting；
4), tensioning: when injecting cement paste reaches design strength, to anchor cable carry out tensioning, after tensioning to design value, to anchor cable outside
End is locked；
5), anchor cable recycles: individually being extracted the steel wire at 1 center of steel strand wires that bottom end is truncated with single tendon stretch jack；
Entire steel strand wires 1 are extracted again and are recycled.
Practice discovery, pressure apparatus 6 can allow steel strand wires 1 to generate centainly when to pressure rings 2 and the fixed pressurization of steel bushing 3
Extrusion deformation, similar to by steel strand wires 1 and constitute steel strand wires 1 every steel wire be pressed into dumb-bell shape.So to guarantee recycling
When core wire can be extracted out, need for the steel wire at center to be truncated in advance；In the case where not being truncated in advance, it is easy center
Steel wire pulls out short, but still steel strand wires 1 is not allowed to fluff, influences to recycle.
Preferably, during the slip casting, concrete slurry used forms in parts by weight are as follows: sandstone particle 4~5
Part, 1 part of cement, 0.1~0.2 part of calcium sulphoaluminate of swelling agent, 1~2 part of quartz sand, water and water-reducing agent, water-reducing agent dosage are 0.8
~1kg/m3, the sandstone particle partial size is in 0.3~0.5cm；The dosage requirement of water is not stringent, and it is true also to regard engineering geological condition
Fixed, rich groundwater is then few with water, guarantees perfusion conveying；The dry then water consumption in underground is big.But because deep basal pit fills
After note, all there are problems that water penetration to ground, therefore high-performance water reducing agent is added, so that slurry is to water consumption with higher
Conformability.
Water-reducing agent of the invention preferably by:
The methyl alkenyl polyoxyethylene that the 0.13mol degree of polymerization is 30~60；
0.32mol acrylic acid；
0.01mol methylpropene sodium sulfonate；
0.12mol acrylamide；
0.05mol styrene；
It is made in the steps below:
A, 70% acrylic acid and other raw materials in addition to methyl alkenyl polyoxyethylene are dissolved in deionized water, are stirred
Uniformly, minor comonomer solution for later use is obtained；
B, sodium hydrogensulfite is dissolved in deionized water, is stirred evenly, obtain chain-transferring agent solution for later use；Sodium hydrogensulfite is used
Amount reacts the 0.35% of total monomer weight by weight；
C, the methyl alkenyl polyoxyethylene that the degree of polymerization is 30~60 is put into reaction vessel with deionized water and is dissolved by heating；
Until completely dissolved, the acrylic acid and initiator of surplus is added, continues stirring heating, rises to 45 ± 2 DEG C to temperature, start to synchronize
Minor comonomer solution and chain-transferring agent solution is at the uniform velocity added dropwise, 8h is dripped off, and then proceedes to insulation reaction 3.5h, and copolymerization obtains molecular weight and is
90000~120000 polymer can terminate to be cooled to 40 DEG C hereinafter, sodium hydroxide solution regulation system pH value is added to 7
Between~8 to get.
The initiator is sodium sulphate or potassium peroxydisulfate, and initiator amount reacts total monomer weight by weight
1.3%；
The total dosage of the deionized water is 1 times of monomer gross mass；Step a dosage is 0.3 times of monomer gross mass, step
Rapid b dosage is 0.1 times of monomer gross mass, and step c dosage is 0.6 times of monomer gross mass.
The water-reducing agent can save dosage, while guarantee splendid water-reducing effect.And ensure concrete physical, especially
It is good fluidity, this has special superiority for foundation pit pouring construction.Product (the solid content: 40%) and now of the present embodiment 1
The test situation for having product to carry out performance comparison is as follows:
Existing product source: the JJPC-C type polycarboxylate high performance water-reducing agent of Chongqing Jian Jie Science and Technology Ltd. production is female
Liquid (solid content: 40%).
It is tested by " concrete admixture " (GB8076-2008).
Concrete match ratio when water-reducing rate result:
As it can be seen that product of the invention has water-reducing rate more higher than existing product.
Function of slump protection test
Concrete mix:
Working performance of concrete experimental result:
As it can be seen that product of the invention has water-reducing rate more higher than existing product, superior function of slump protection.Because of this diminishing
Agent application range is wider, so above-mentioned comparative test uses more conventional concrete formulation and compares.Those skilled in the art
Member can be determined that water-reducing agent of the present invention uses in other concrete formulation also technical effect having the same by said effect.
Claims (7)
1. a kind of telescopic Recyclable anchor rope, it is characterised in that: including steel strand wires, protecting tube, anchor plate, pressure rings, steel bushing；
The pressure rings are made of spring wire, and pressure rings are located at outside steel strand wires bottom end, and steel bushing is located at outside pressure rings, and by pressure
Steel bushing and pressure rings are fixed by device on steel strand wires；The steel bushing is connect with anchor plate；The steel strand wires exist
The steel wire at center is truncated in advance for bottom end vicinity, truncation position be located at that steel bushing is interior or steel bushing close to steel strand wires bottom end end
Near；The protecting tube is set on the steel strand wires on the outside of anchor plate.
2. telescopic Recyclable anchor rope according to claim 1, it is characterised in that: the truncation positional distance steel strand wires
Bottom end 3cm or more, and it is located at steel bushing close to the end face outside of steel strand wires bottom end.
3. telescopic Recyclable anchor rope according to claim 2, it is characterised in that: the truncation positional distance steel strand wires
3~30cm of bottom end.
4. telescopic Recyclable anchor rope according to claim 3, it is characterised in that: the truncation positional distance steel strand wires
4~8cm of bottom end.
5. telescopic Recyclable anchor rope described according to claim 1~any one of 4, it is characterised in that: the steel twists
Line is 7 steel strand wires.
6. construction and recovery method using anchor cable described in any one of Claims 1 to 55, which is characterized in that including such as
Lower step:
1) it, punches: processing anchor hole by design requirement；
2), anchor cable makes: the steel strand wires of anchor cable use bare wire, and additional protecting tube divides steel strand wires by bottom end vicinity in steel strand wires
It is shattered into individual wire, is being truncated by the position 4~30cm of close end to by the steel wire at steel strand wires center；Steel wire is reverted to again
Beam becomes steel strand wires, and then the upper anchor plate of string, puts on pressure rings and steel bushing, steel bushing and pressure rings are existed with pressure apparatus
It is fixed on steel strand wires, and guarantees that the truncation position of steel wire is placed exactly in steel bushing or steel bushing is close to steel strand wires bottom end
Near end；Then steel bushing and anchor plate are fixed；Band anchor plate one end of anchor cable is put into anchor hole again, the same anchor of Grouting Pipe
Suo Yitong is put into；
3), slip casting: from anchor cable hole rising pouring concrete grout, after slurries return out from aperture, sealing pressurization stops after reaching design pressure
Slip casting；
4), tensioning: when injecting cement paste reaches design strength, to anchor cable carry out tensioning, after tensioning to design value, to anchor cable outer end into
Row locking；
5), anchor cable recycles: individually being extracted the steel wire at the steel strand wires center that bottom end is truncated with single tendon stretch jack；It again will be whole
A steel strand wires extract recycling.
7. construction and the recovery method of anchor cable according to claim 6, it is characterised in that: during the slip casting, institute
It with concrete slurry, forms in parts by weight are as follows: 4~5 parts of sandstone particle, 1 part of cement, 0.1~0.2 part of swelling agent, quartz sand 1
~2 parts, water and water-reducing agent, water-reducing agent dosage are 0.8~1kg/m3, the sandstone particle partial size is in 0.3~0.5cm；
The water-reducing agent be by:
The methyl alkenyl polyoxyethylene that the 0.13mol degree of polymerization is 30~60；
0.32mol acrylic acid；
0.01mol methylpropene sodium sulfonate；
0.12mol acrylamide；
0.05mol styrene；
It is made in the steps below:
A, 70% acrylic acid and other raw materials in addition to methyl alkenyl polyoxyethylene are dissolved in deionized water, stirring is equal
It is even, obtain minor comonomer solution for later use；
B, sodium hydrogensulfite is dissolved in deionized water, is stirred evenly, obtain chain-transferring agent solution for later use；Sodium hydrogensulfite dosage is pressed
Weight is calculated as the 0.3~0.4% of reaction total monomer weight；
C, the methyl alkenyl polyoxyethylene that the degree of polymerization is 30~60 is put into reaction vessel with deionized water and is dissolved by heating；To complete
After fully dissolved, the acrylic acid and initiator of surplus is added, continues stirring heating, rises to 45 ± 2 DEG C to temperature, starts synchronous uniform velocity
Minor comonomer solution and chain-transferring agent solution is added dropwise, 8h is dripped off, then proceed to 3~4h of insulation reaction, then be cooled to 40 DEG C hereinafter, plus
Enter sodium hydroxide solution regulation system pH value between 7~8 to get；
The initiator be sodium sulphate or potassium peroxydisulfate, initiator amount react by weight total monomer weight 1~
1.4%；
The total dosage of the deionized water is 1 times of monomer gross mass；Step a dosage is 0.3 times of monomer gross mass, step b
Dosage is 0.1 times of monomer gross mass, and step c dosage is 0.6 times of monomer gross mass.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4103618A (en) * | 1974-06-19 | 1978-08-01 | Losinger Ag | Means for extracting a soil anchor consisting of a prestressed steel tendon |
| CN102849978A (en) * | 2012-09-10 | 2013-01-02 | 重庆健杰科技有限公司 | Sustained-release polycarboxylic high-performance water reducing agent and preparation method thereof |
| CN202989918U (en) * | 2012-12-20 | 2013-06-12 | 浙江省天和建材集团有限公司 | Intelligent bearing head capable of recovering pre-stressed anchor cables |
| CN203080518U (en) * | 2012-12-21 | 2013-07-24 | 晏晓彤 | Self-drilling type recoverable anchor wire |
| CN204456101U (en) * | 2015-02-13 | 2015-07-08 | 葛洲坝集团基础工程有限公司 | A kind of Recyclable anchor rope |
-
2016
- 2016-08-30 CN CN201610758531.6A patent/CN106351219B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4103618A (en) * | 1974-06-19 | 1978-08-01 | Losinger Ag | Means for extracting a soil anchor consisting of a prestressed steel tendon |
| CN102849978A (en) * | 2012-09-10 | 2013-01-02 | 重庆健杰科技有限公司 | Sustained-release polycarboxylic high-performance water reducing agent and preparation method thereof |
| CN202989918U (en) * | 2012-12-20 | 2013-06-12 | 浙江省天和建材集团有限公司 | Intelligent bearing head capable of recovering pre-stressed anchor cables |
| CN203080518U (en) * | 2012-12-21 | 2013-07-24 | 晏晓彤 | Self-drilling type recoverable anchor wire |
| CN204456101U (en) * | 2015-02-13 | 2015-07-08 | 葛洲坝集团基础工程有限公司 | A kind of Recyclable anchor rope |
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