CN108894219B - Anchor rod can be dismantled to pulling force type - Google Patents
Anchor rod can be dismantled to pulling force type Download PDFInfo
- Publication number
- CN108894219B CN108894219B CN201810668491.5A CN201810668491A CN108894219B CN 108894219 B CN108894219 B CN 108894219B CN 201810668491 A CN201810668491 A CN 201810668491A CN 108894219 B CN108894219 B CN 108894219B
- Authority
- CN
- China
- Prior art keywords
- stirring
- resin
- anchor rod
- deionized water
- steel strand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 229920005989 resin Polymers 0.000 claims abstract description 45
- 239000011347 resin Substances 0.000 claims abstract description 45
- 230000007704 transition Effects 0.000 claims abstract description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 39
- 239000002105 nanoparticle Substances 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000000805 composite resin Substances 0.000 claims description 22
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 18
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 239000000377 silicon dioxide Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- 229920000642 polymer Polymers 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000011258 core-shell material Substances 0.000 claims description 13
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 229920001429 chelating resin Polymers 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000002041 carbon nanotube Substances 0.000 claims description 9
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 9
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- ZLKNPIVTWNMMMH-UHFFFAOYSA-N 1-imidazol-1-ylsulfonylimidazole Chemical compound C1=CN=CN1S(=O)(=O)N1C=CN=C1 ZLKNPIVTWNMMMH-UHFFFAOYSA-N 0.000 claims description 7
- 239000013522 chelant Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- GTJOHISYCKPIMT-UHFFFAOYSA-N 2-methylundecane Chemical compound CCCCCCCCCC(C)C GTJOHISYCKPIMT-UHFFFAOYSA-N 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- SGVYKUFIHHTIFL-UHFFFAOYSA-N Isobutylhexyl Natural products CCCCCCCC(C)C SGVYKUFIHHTIFL-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- VKPSKYDESGTTFR-UHFFFAOYSA-N isododecane Natural products CC(C)(C)CC(C)CC(C)(C)C VKPSKYDESGTTFR-UHFFFAOYSA-N 0.000 claims description 4
- CAAULPUQFIIOTL-UHFFFAOYSA-N methyl dihydrogen phosphate Chemical compound COP(O)(O)=O CAAULPUQFIIOTL-UHFFFAOYSA-N 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- WLJVXDMOQOGPHL-UHFFFAOYSA-N phenylacetic acid Chemical compound OC(=O)CC1=CC=CC=C1 WLJVXDMOQOGPHL-UHFFFAOYSA-N 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- -1 sodium hexafluorosilicate benzyl pyrimidine Chemical group 0.000 claims description 4
- 229920005601 base polymer Polymers 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- WLJVXDMOQOGPHL-PPJXEINESA-N 2-phenylacetic acid Chemical compound O[14C](=O)CC1=CC=CC=C1 WLJVXDMOQOGPHL-PPJXEINESA-N 0.000 claims description 2
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 2
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 claims description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- CZHYKKAKFWLGJO-UHFFFAOYSA-N dimethyl phosphite Chemical compound COP([O-])OC CZHYKKAKFWLGJO-UHFFFAOYSA-N 0.000 claims description 2
- 238000004821 distillation Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- QGEFGPVWRJCFQP-UHFFFAOYSA-M magnesium;methanidylbenzene;bromide Chemical compound [Mg+2].[Br-].[CH2-]C1=CC=CC=C1 QGEFGPVWRJCFQP-UHFFFAOYSA-M 0.000 claims description 2
- 229960003424 phenylacetic acid Drugs 0.000 claims description 2
- 239000003279 phenylacetic acid Substances 0.000 claims description 2
- XKJCHHZQLQNZHY-UHFFFAOYSA-N phthalimide Chemical compound C1=CC=C2C(=O)NC(=O)C2=C1 XKJCHHZQLQNZHY-UHFFFAOYSA-N 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- JTDPJYXDDYUJBS-UHFFFAOYSA-N quinoline-2-carbohydrazide Chemical compound C1=CC=CC2=NC(C(=O)NN)=CC=C21 JTDPJYXDDYUJBS-UHFFFAOYSA-N 0.000 claims description 2
- 238000003980 solgel method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000000967 suction filtration Methods 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000004873 anchoring Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 9
- 238000005553 drilling Methods 0.000 description 8
- 239000004575 stone Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- LFKYBJLFJOOKAE-UHFFFAOYSA-N imidazol-2-ylidenemethanone Chemical compound O=C=C1N=CC=N1 LFKYBJLFJOOKAE-UHFFFAOYSA-N 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 150000003138 primary alcohols Chemical class 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
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
- E21D21/0026—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)
- 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)
- Reinforcement Elements For Buildings (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The tension type detachable anchor rod is characterized by comprising a steel strand bundle (1) and a resin transition layer (2); the steel strand bundle (1) is a plurality of strands of articulated steel wires, and the resin transition layer (2) is coated outside the steel strand bundle (1). The steel strand taking device is simple in structure and capable of taking out steel strands conveniently.
Description
Technical Field
The invention relates to a tension type detachable anchor rod.
Background
With the development of urban underground space utilization, the pile anchoring technology in foundation pit support is widely applied. However, the use of a large number of anchor rods leads to more and more anchor rods buried in the city underground, the anchor rods extend out of the ground red line to seriously invade the underground space of the adjacent building, hidden dangers are left for subsequent engineering construction, and serious pollution is also caused to the urban underground space.
Along with the enhancement of property consciousness and the enhancement of environmental protection consciousness, the application of stock can be restricted gradually, need retrieve the stock after the stock service function is accomplished for the recoverable technique of stock gradually begins to popularize and apply. And the anchor rod can be recycled to generate higher economic value and social value after being recovered.
At present, the recoverable technology of the anchor rod belongs to the pressure type anchor rod technology, various sleeves are arranged outside the anchor rod, and the detachable anchorage device is arranged at the bottom end of the anchor rod to realize the recovery of the anchor rod. The pressure type recoverable anchor rod technology needs the anchor at the end part to play a stronger role, has higher requirements on the quality of the grouting stones at the end part of the anchor rod, and can not recover the anchor at the end part when the anchor rod is recovered.
The anchoring technology is classified into a tension type anchoring technology, a pressure type anchoring technology, and a tension and compression combined type anchoring technology. At present, the detachable and recycled steel strand is only used for pressure type anchoring technology.
From the atress condition to the difficult and easy degree of construction, pulling force type anchor technique has more the advantage than pressure type anchor technique, and pulling force type stock simple structure moreover, construction convenience, the cost is lower. Especially suitable for the severe construction environment. However, the tension anchor rods can not be detached and recycled so far, and the anchor rods are left in soil after construction is completed, so that environmental pollution, water and soil pollution and metal loss are caused. If the tension anchor rod can be detachably recycled, high economic value and social value can be generated.
Disclosure of Invention
The invention aims to provide a tension type detachable anchor rod which is characterized by comprising a steel strand bundle (1) and a resin transition layer (2);
the steel strand bundle (1) is a plurality of strands of articulated steel wires, and the resin transition layer (2) is coated outside the steel strand bundle (1).
The thickness of the resin transition layer (2) is 2-3 mm.
The steel strand bundle (1) consists of 5-10 strands of hinged steel wires.
The steel strand bundle (1) is provided with a plurality of bundles, and an electrified loop is formed among the bundles through an electrified hoop (9)
The resin transition layer (2) is made of composite resin.
The outer side of the resin transition layer (2) is provided with a corrugated pipe (3).
Has the advantages that:
1. according to the invention, the steel strand or the rib body is wrapped with the resin transition layer, and the resin transition layer can realize the force transmission between the steel strand or the rib body and the grouting stone body in the use process of the anchor rod, so that the whole structure forms a tension type anchoring system, and the high requirement of the pressure type anchoring system on the grouting quality of the bottom end part is avoided.
2. According to the invention, the steel strand or the rib body is wrapped with the resin transition layer, and the resin transition layer is electrified after the anchor rod is used, so that the steel strand or the rib body is heated to soften the resin transition layer, the friction force between the steel strand or the rib body and the grouting concretion body (5) is reduced, and the steel strand or the rib body is taken out by applying a pulling force to the outer end part of the steel strand or the rib body.
3. According to the invention, the steel strand or the rib body is wrapped with the resin transition layer, the resin transition layer can realize the transmission of force between the steel strand or the rib body and the grouting stone body (5) in the use process of the anchor rod, and after the anchor rod is used, the friction force between the steel strand or the rib body and the grouting stone body is reduced through heating and softening, so that the steel strand or the rib body is taken out. And the anchor rod structure system is a tension type anchoring system in the using process, and has higher safety than a pressure type anchor rod system.
4. In another embodiment, a corrugated pipe (3) is arranged between the resin transition layer of each steel strand and the grouting stone body (5), so that the resin transition layer is formed conveniently, and after the anchor rod is used, the friction force between the steel strand or the rib body and the grouting stone body is reduced through heating and softening, and then the steel strand or the rib body is taken out.
Drawings
FIG. 1 is a schematic structural view of the anchor rod of the present patent;
FIG. 2 is a schematic view of an assembly structure of a plurality of anchor rods;
FIG. 3 is a schematic cross-sectional view of the stent site of FIG. 2;
FIG. 4 is a schematic view of a power-on hoop;
Detailed Description
The invention will be further illustrated with reference to the following specific examples.
Example 1
As shown in fig. 1, the tension type detachable anchor rod is characterized by comprising a steel strand bundle (1), a resin transition layer (2);
the steel strand bundle (1) is a plurality of strands of articulated steel wires, and the resin transition layer (2) is coated outside the steel strand bundle (1).
The thickness of the resin transition layer (2) is 2-3 mm.
The steel strand bundle (1) consists of 5-10 strands of hinged steel wires.
The steel strand bundle (1) is provided with a plurality of bundles, and an electrified loop is formed among the bundles through an electrified hoop (9)
The resin transition layer (2) is made of composite resin.
The material of the resin transition layer (2) is composite resin, and the composite resin is prepared by the following method: adding epoxy resin, chelating resin, a first polymer, imidazole and nano particles into a container according to the mass ratio of 10-30:3-8:1-3:0.001-0.005:2-5, stirring for 1-3h under vacuum, dispersing for 20min by using an ultrasonic device, and removing bubbles under reduced pressure to obtain the composite resin.
The tension type detachable anchor rod comprises the following steps:
1. hole positioning and drilling: before drilling, measuring a paying-off and positioning hole position according to design requirements, and marking; then, drilling holes by an anchor rod drilling machine or manual work, wherein the diameter of the formed holes is 110 mm-200 mm;
2. manufacturing an anchor rod: the manufacturing length of the anchor rod is the sum of the design length and the exposed tensioning length of 1.0 m. Fixing the steel strand (1), and coating a resin transition layer (2) with the thickness of 2-3mm on the outer side of the steel strand;
firmly binding the steel strand with the isolation frame; the non-anchoring section is sleeved with a plastic hose, and two ends of the plastic hose are fastened and sealed by lead wires; the steel strand bundle (1) is provided with a plurality of bundles, and an electrified loop is formed among the bundles through an electrified hoop (9);
3. and (3) anchor rod installation: and after the hole is formed, an anchor rod piece is inserted and installed in time, the rod piece is kept straight and stably inserted and sent without obvious torsion, and after the rod piece is inserted, an anchor rod with the length of 1.0m is reserved outside the hole.
4. Grouting in the hole: inserting the grouting pipe and the anchor rod body together to the bottom of the hole, beginning grouting into the hole through the grouting pipe by using a high-pressure grouting pump, and slowly drawing out the grouting pipe along with grouting after 2-3min from the beginning of grouting until the orifice of the anchor hole is filled with grouting; and (3) timely grout is supplemented after 10-17min intervals, during grout supplementing, the grouting pipe is inserted into the anchor hole as much as possible, the grout supplementing frequency is preferably 2-3 times, full hole grouting is ensured, and a grouting concretion body (5) is formed outside the anchor rod.
5. Tensioning and locking an anchor rod: and when the slurry strength reaches more than 15MPa, tensioning and locking the anchor rod, tensioning the anchor rod to 1.1-1.2 times of the designed tension, maintaining for 10min, and unloading to lock the load to lock.
6. Dismantling an anchor rod: after the anchor rod is used, the anchor at the anchor head is detached, the steel strand bundle (1) forms an electrified loop through an electrified anchor ear (9), the steel strand bundle is electrified or heated, so that the resin transition layer (2) is softened, and then the anchor rod is pulled out.
The chelate resin adopted in the preparation process of the composite resin is prepared by the following method:
step one, pretreatment of base material
Mixing carbon nanotubes as a matrix material (the length of the carbon nanotubes is 5-100nm) and acetic acid in a mass ratio of 3-6:10-30, heating to 60-100 ℃, stirring for 3-20h to obtain acidified carbon nanotubes, cooling to normal temperature, washing with deionized water to neutrality, and drying for later use;
placing the carbon nanotubes acidified in the step one in a container of saturated steam (the saturated steam is sodium chloride saturated steam), so that a water molecule layer is formed on the surface of the carbon nanotubes until the water content of the hydrated matrix is 2-8 wt%;
step three, preparation of amidated base Polymer
Mixing the hydrated matrix prepared in the step two, isododecane, phthalimide and formaldehyde in a mass ratio of 5-10:8-15:6-10:20-30 at normal temperature, adjusting the pH of the solution to 5.5-6 while stirring, stirring for 2-5h, removing moisture through distillation, cooling to normal temperature, adding sulfuric acid to adjust the pH of the solution to 4-5, heating to 60-70 ℃ for reaction for 30-60min, and distilling again to remove moisture and residual isododecane to obtain an amidated matrix polymer;
step four, preparation of chelate resin
And (3) mixing and stirring the amidated base polymer prepared in the third step, deionized water, methyl phosphate and formaldehyde for 10-15min at the mass ratio of 5-10:3-6:4-8:4-8, heating to 40-50 ℃, adding dimethyl phosphite with the same mass as that of the methyl phosphate, continuously stirring for 3-6h, cooling to normal temperature, washing with deionized water, and drying to constant weight to obtain the chelate resin. (the resin has a nitrogen content of 4-6 wt% and a phosphorus content of 11-13 wt%)
(II) the first polymer adopted in the preparation process of the composite resin is prepared by adopting the following method:
mixing pyrimidine and benzyl magnesium bromide in a molar ratio of 1-2:1-1.5, adding the mixture into a reactor to obtain a mixture, adding acetonitrile, wherein the addition amount of the acetonitrile is 3-10 times of the mass of the mixture, stirring and reacting at room temperature for 5-10h, then heating to 40-50 ℃ to react for 5-12h, filtering the mixture, washing with the acetonitrile for 3-6 times, drying to obtain a first compound, mixing the first compound and sodium hexafluorosilicate in a molar ratio of 1-2:1-1.8, simultaneously adding deionized water in an amount which is 3-6 times of the mass of the first compound, stirring at room temperature for 20-120min, performing suction filtration, and washing solid particles with deionized water for 3-6 times to obtain a first polymer (the first polymer is benzylpyrimidine hexafluorosilicate).
(III) the nano particles adopted in the preparation process of the composite resin are nano silicon dioxide particles or modified nano particles;
the surface-modified nanoparticles were prepared as follows:
step A, preparation of mesoporous silica nanoparticles
Placing hexadecyl trimethyl ammonium bromide into deionized water, mechanically stirring for 15-30min, adding isopropanol and 25% ammonia water after stirring, stirring for 30min at 50-80 ℃, adding tetraethyl orthosilicate and benzoyl peroxide, heating to 60-100 ℃ at the heating rate of 10-15 ℃/min, stirring for 2-4h, stopping stirring, standing for 15-30h to obtain layered solution, cooling to room temperature, centrifuging by adopting a centrifuge, respectively cleaning precipitates by adopting ethanol and deionized water for 3-6 times, and then drying in vacuum to obtain mesoporous silica nanoparticles;
the mass ratio of the hexadecyl trimethyl ammonium bromide to the deionized water to the isopropanol to the ammonia water to the tetraethyl orthosilicate is 1-3:50-300:10-30:5-20:3-8: 2-4;
step B, TiO2Preparation of core-shell structure nano-particles coated with mesoporous silica
Hydrolysis of butyl titanate to TiO by sol-gel method2Sol and loading the sol on the surface of the mesoporous silica nano-particles prepared in the step A by stirring to obtain TiO2The mesoporous silica-coated core-shell structure nano-particles comprise butyl titanate and mesoporous silica nano-particles, wherein the mass ratio of the butyl titanate to the mesoporous silica nano-particles is 5-20: 1-5;
step C, surface modification of core-shell structure material
The TiO prepared in the step B2Mixing the core-shell structure material coated with the mesoporous silica nano particles, aminopropyltrimethoxysilane and methylbenzene according to the mass ratio of 1-5:0.001-0.005:20-70, introducing nitrogen, stirring for 3-6 hours, stopping introducing the nitrogen, adding 1, 1' -sulfonyl diimidazole and phenylacetic acid, heating to the temperature of 40-110 ℃, continuously stirring for 3-6 hours without bubbles, centrifugally separating, cleaning for 3-6 times by using deionized water, and drying to obtain modified core-shell structure nano particles (TiO)2The mass ratio of the coated mesoporous silica nanoparticle core-shell structure material to the 1, 1' -sulfonyl diimidazole to the phenylacetic acid is 1-5:2-4: 6-10).
(IV) the resin was tested to have the following excellent properties, see Table 1
A: commercially available epoxy resins;
b: composite resin of the present invention
C: composite resin without first polymer
D: composite resin without chelating resin
E: composite resin without chelating resin and first polymer
TABLE 1
It is apparent from table 1 that the strength index of the composite resin of the present invention is completely higher than that of the common commercially available epoxy resin, but the heat resistance is lowered;
the performance of the composite resin without the first polymer but with the chelating resin is higher than that of the commercial resin, but the heat resistance is still reduced, so that the chelating resin can improve the strength of the composite resin to a limited extent, and the influence on the heat resistance is great;
d is the composite resin without the chelating resin, the strength of the resin is improved, but the heat resistance is also improved, which is caused by the addition of the nano-particles;
e is a composite resin to which the chelate resin and the first polymer are not added, and it is seen that the strength of the resin is improved, but the heat resistance is also improved due to the addition of the nanoparticles.
1. It can be seen from table 1 that the chelating resin added can improve the strength of the composite resin, but the heat resistance is reduced, and the strength of the resin can be effectively improved by adding the first polymer, and it is studied that the prepared first polymer (sodium hexafluorosilicate benzylpyrimidine) can enhance the bonding strength between the epoxy resin and the chelating resin, and various strength indexes can be effectively improved by the synergistic effect after curing, and the reason for the reduction of the heat resistance of the present invention is completely due to the chelating resin.
2. The 1,1 '-sulfonyl diimidazole is applied to the surface modification of the nano material for the first time, the 1, 1' -sulfonyl diimidazole used in the method has a closed large p bond in the imidazole structure of the compound, and an sp2 orbit with one nitrogen atom not bonded has a pair of lone pair electrons, all of which have stronger reaction activity, and can react with carboxyl to obtain a carbonyl imidazole active intermediate with high reaction activity, and the intermediate can selectively react with primary alcohol or primary amine, so that an organic matter is grafted to the surface of the metal nano oxide more easily, the grafting rate of the organic matter grafted to the surface of the nano metal oxide is improved, and the grafting efficiency can be as high as 92%;
2. the use of 1, 1' -sulfonyldiimidazoles according to the invention has a number of advantages: the method has the advantages of high efficiency, high selectivity, low cost, mild reaction conditions, no side reaction and no toxicity of byproducts (carbon dioxide and imidazole) generated by the reaction, and is beneficial to energy conservation and emission reduction;
3. the nano metal oxide treated by the method can be well dispersed in chelating resin and epoxy resin and form bond combination, and can fully exert the excellent characteristics of the nano metal oxide for wide application;
4. the invention adopts TiO for the first time2The mesoporous silica is coated to form core-shell structured nanoparticles, the nanoparticles have good heat conduction performance and electric conductivity, and when the composite resin is electrified for 2-10s at 100V, the steel strand can be softened and drawn out.
Example 2
As shown in fig. 2-3, an open type bellows sleeve may be added to the outside of the resin layer; this bellows (3) can reach the effect of increase resistance, improves structure tensile strength, and the smooth extraction of steel strand wires is guaranteed when the protection inlayer resin layer is demolishd in the heating.
1. Hole positioning hole drilling (8): before drilling, measuring a paying-off and positioning hole position according to design requirements, and marking; then, drilling holes by an anchor rod drilling machine or manual work, wherein the diameter of the formed holes is 110 mm-200 mm;
2. manufacturing an anchor rod: the manufacturing length of the anchor rod is the sum of the design length and the exposed tensioning length of 1.0 m. Fixing the steel strand (1) and the accompanying materials together, then coating and coating a resin transition layer (2) with the thickness of 2-3mm on the outer side of the steel strand, wherein the embodiment 1 adopts a multi-pass coating process, the embodiment 2 only coats a certain thickness, an anchor rod (6) is formed by extrusion molding of buckling and slicing corrugated pipes (3), the anchor rod is fixed along the direction of a positioning hole through a support (7), one support (7) is arranged every 2.00m along the axial direction of the whole anchor rod body, and the steel strand and an isolation frame are firmly bound by a thin iron wire; the non-anchoring section is sleeved with a plastic hose (11), and two ends of the non-anchoring section are fastened and sealed by lead wires (10); the steel strand bundle (1) is provided with a plurality of bundles, and an electrified loop is formed among the bundles through an electrified hoop (9);
3. and (3) anchor rod installation: the installation anchor rod (6) and the bracket are inserted in time after the hole is formed in the drill hole (8), the rod piece is kept straight and stably inserted without obvious torsion, the rod piece is inserted into the drill hole (8), and the anchor rod with the length of 1.0m is reserved outside the hole;
4. grouting in the hole: inserting the grouting pipe and the anchor rod body I to the bottom of the hole, beginning grouting into the hole through the grouting pipe by using a high-pressure grouting pump, and slowly drawing out the grouting pipe along with grouting after 2-3min from the beginning of grouting until the orifice of the anchor hole is filled with grouting; grouting in time after 10-17min intervals, inserting a grouting pipe into an anchor hole as much as possible during grouting, wherein the grouting frequency is preferably 2-3 times, full hole grouting is ensured, and a grouting concretion body (5) is formed outside the anchor rod;
5. tensioning and locking an anchor rod: and when the slurry strength reaches more than 15MPa, tensioning and locking the anchor rod, tensioning the anchor rod to 1.1-1.2 times of the designed tension, maintaining for 10min, and unloading to lock the load to lock.
6. Dismantling an anchor rod: after the anchor rod is used, the anchor device at the anchor head is detached, the steel strand is electrified, so that the resin transition layer (2) is softened, and then the anchor rod is pulled out.
Fig. 3 shows a cross-sectional view of a plurality of anchor rods, wherein the plurality of anchor rods (6) are fixed in the borehole (8) by means of the carrier (7), wherein the anchor rods (6) are located in recesses of the carrier (7).
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (3)
1. The tension type detachable anchor rod is characterized by comprising a steel strand bundle (1) and a resin transition layer (2); the steel strand bundle (1) is a plurality of strands of articulated steel wires, and the resin transition layer (2) is coated outside the steel strand bundle (1); the steel strand bundle (1) is provided with a plurality of bundles, and an electrified loop is formed among the bundles through an electrified hoop (9); the resin transition layer (2) is made of composite resin; the composite resin is prepared by the following method: adding epoxy resin, chelating resin, a first polymer, imidazole and nano particles into a container according to the mass ratio of 10-30:3-8:1-3:0.001-0.005:2-5, stirring for 1-3h under a vacuum degree, dispersing for 20min by using an ultrasonic device, and removing bubbles under reduced pressure to obtain composite resin; the first polymer is sodium hexafluorosilicate benzyl pyrimidine; the chelate resin is prepared by the following method:
step one, pretreatment of base material
Mixing carbon nanotubes as a matrix material with acetic acid in a mass ratio of 3-6:10-30, heating to 60-100 ℃, stirring for 3-20h to obtain acidified carbon nanotubes, cooling to normal temperature, washing with deionized water to neutrality, and drying for later use;
placing the carbon nanotubes acidified in the step one in a container of saturated steam to form a water-containing layer on the surfaces of the carbon nanotubes until the water content of the water-containing layer is 2-8 wt% of a hydrated matrix;
step three, preparation of amidated base Polymer
Mixing the hydrated matrix prepared in the step two, isododecane, phthalimide and formaldehyde in a mass ratio of 5-10:8-15:6-10:20-30 at normal temperature, adjusting the pH of the solution to 5.5-6 while stirring, stirring for 2-5h, removing moisture through distillation, cooling to normal temperature, adding sulfuric acid to adjust the pH of the solution to 4-5, heating to 60-70 ℃ for reaction for 30-60min, and distilling again to remove moisture and residual isododecane to obtain an amidated matrix polymer;
step four, preparation of chelate resin
Mixing and stirring the amidated matrix polymer prepared in the third step, deionized water, methyl phosphate and formaldehyde for 10-15min at the mass ratio of 5-10:3-6:4-8:4-8, heating to 40-50 ℃, adding dimethyl phosphite with the same mass as that of the methyl phosphate, continuously stirring for 3-6h, cooling to normal temperature, washing by using deionized water, and drying to constant weight to obtain chelate resin;
wherein the first polymer is prepared by the following method:
mixing pyrimidine and benzyl magnesium bromide in a molar ratio of 1-2:1-1.5, adding the mixture into a reactor to obtain a mixture, adding acetonitrile, wherein the addition amount of the acetonitrile is 3-10 times of the mass of the mixture, stirring and reacting at room temperature for 5-10h, then heating to 40-50 ℃ to react for 5-12h, filtering the mixture, washing with acetonitrile for 3-6 times, drying to obtain a first compound, mixing the first compound and sodium hexafluorosilicate in a molar ratio of 1-2:1-1.8, simultaneously adding deionized water in an amount which is 3-6 times of the mass of the first compound, stirring at room temperature for 20-120min, performing suction filtration, and washing solid particles with deionized water for 3-6 times to obtain benzylpyrimidine hexafluorosilicate;
wherein the nanoparticles are surface-modified nanoparticles;
the surface-modified nanoparticles were prepared as follows:
step A, preparation of mesoporous silica nanoparticles
Placing hexadecyl trimethyl ammonium bromide into deionized water, mechanically stirring for 15-30min, adding isopropanol and 25% ammonia water after stirring, stirring for 30min at 50-80 ℃, adding tetraethyl orthosilicate and benzoyl peroxide, heating to 60-100 ℃ at the heating rate of 10-15 ℃/min, stirring for 2-4h, stopping stirring, standing for 15-30h to obtain layered solution, cooling to room temperature, centrifuging by adopting a centrifuge, respectively cleaning precipitates by adopting ethanol and deionized water for 3-6 times, and drying in vacuum to obtain mesoporous silica nanoparticles;
the mass ratio of the hexadecyl trimethyl ammonium bromide to the deionized water to the isopropanol to the ammonia water to the tetraethyl orthosilicate is 1-3:50-300:10-30:5-20:3-8: 2-4;
step B, TiO2Core-shell structure nano-particles coated with mesoporous silicaPreparation of granules
Hydrolysis of butyl titanate to TiO by sol-gel method2Sol and loading the sol on the surface of the mesoporous silica nano-particles prepared in the step A by stirring to obtain TiO2The mesoporous silica-coated core-shell structure nano-particles comprise butyl titanate and mesoporous silica nano-particles, wherein the mass ratio of the butyl titanate to the mesoporous silica nano-particles is 5-20: 1-5;
step C, surface modification of core-shell structure material
The TiO prepared in the step B2Mixing the core-shell structure material coated with the mesoporous silica nano particles, aminopropyltrimethoxysilane and methylbenzene according to the mass ratio of 1-5:0.001-0.005:20-70, introducing nitrogen, stirring for 3-6 hours, stopping introducing the nitrogen, adding 1, 1' -sulfonyl diimidazole and phenylacetic acid, heating to the temperature of 40-110 ℃, continuously stirring for 3-6 hours without bubbles, performing centrifugal separation, cleaning for 3-6 times by using deionized water, and drying to obtain modified core-shell structure nano particles, wherein the TiO is TiO2The mass ratio of the coated mesoporous silica nanoparticle core-shell structure material to the 1, 1' -sulfonyl diimidazole to the phenylacetic acid is 1-5:2-4: 6-10.
2. A tension type detachable anchor rod according to claim 1, wherein the thickness of the resin transition layer (2) is 2-3 mm.
3. A tension type detachable anchor rod according to claim 1, wherein the outside of the resin transition layer (2) is provided with a bellows (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810668491.5A CN108894219B (en) | 2018-06-26 | 2018-06-26 | Anchor rod can be dismantled to pulling force type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810668491.5A CN108894219B (en) | 2018-06-26 | 2018-06-26 | Anchor rod can be dismantled to pulling force type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108894219A CN108894219A (en) | 2018-11-27 |
| CN108894219B true CN108894219B (en) | 2021-02-02 |
Family
ID=64346024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810668491.5A Active CN108894219B (en) | 2018-06-26 | 2018-06-26 | Anchor rod can be dismantled to pulling force type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108894219B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116263053B (en) * | 2021-12-14 | 2024-06-18 | 中国五冶集团有限公司 | Vacuum suction type anti-floating anchor rod |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100072465A (en) * | 2008-12-22 | 2010-07-01 | 재단법인 포항산업과학연구원 | Earth anchor with the rotary passive anchorage |
| CN103061338A (en) * | 2013-02-04 | 2013-04-24 | 苏州市能工基础工程有限责任公司 | Composite steel capable of conveniently recovering core material and recovering method of composite steel |
| KR101384932B1 (en) * | 2011-10-06 | 2014-04-14 | 쌍용건설 주식회사 | sleeve for diffusing of stress |
| CN204023567U (en) * | 2014-08-11 | 2014-12-17 | 华侨大学 | A kind of tension and compression composite anchor-rod |
| CN204080801U (en) * | 2014-02-20 | 2015-01-07 | 苏州市能工基础工程有限责任公司 | For the steel strand of hot melt anchor |
-
2018
- 2018-06-26 CN CN201810668491.5A patent/CN108894219B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100072465A (en) * | 2008-12-22 | 2010-07-01 | 재단법인 포항산업과학연구원 | Earth anchor with the rotary passive anchorage |
| KR101384932B1 (en) * | 2011-10-06 | 2014-04-14 | 쌍용건설 주식회사 | sleeve for diffusing of stress |
| CN103061338A (en) * | 2013-02-04 | 2013-04-24 | 苏州市能工基础工程有限责任公司 | Composite steel capable of conveniently recovering core material and recovering method of composite steel |
| CN204080801U (en) * | 2014-02-20 | 2015-01-07 | 苏州市能工基础工程有限责任公司 | For the steel strand of hot melt anchor |
| CN204023567U (en) * | 2014-08-11 | 2014-12-17 | 华侨大学 | A kind of tension and compression composite anchor-rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108894219A (en) | 2018-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206693510U (en) | A kind of device for FRP tendons connection | |
| CN108894219B (en) | Anchor rod can be dismantled to pulling force type | |
| CN101870799B (en) | Modified epoxy resin composite for strengthening concrete pole | |
| CN105971288B (en) | Integral type intermediate plate type anchor device structure device and its assemble method | |
| CN206246065U (en) | Oil pumping system and its rod connector | |
| CN102839845B (en) | Tower node connection device made from composite material | |
| CN108951613B (en) | Recoverable steel reinforcement cage | |
| CN104131459B (en) | A kind of vinyl ester carbon fiber sizing agent containing CNTs and preparation method thereof | |
| CN107254876A (en) | The pile pulling device and method of a kind of armored concrete pile for prestressed pipe | |
| CN202678908U (en) | High-toughness power cable protection tube | |
| CN105281278B (en) | A kind of extra large cable centralized positioning protection device | |
| CN108558281B (en) | Seabed interlayer pipeline and special phase change microcapsule thereof | |
| CN206108751U (en) | Electronic hanging flower basket steel wire rope lock shell type connection structure | |
| CN205777000U (en) | A kind of prestressed steel structure cable support node | |
| CN102010573A (en) | Novel carbon fiber sucker rod and manufacturing method thereof | |
| CN208618668U (en) | Composite connector for FRP tendons | |
| CN204252342U (en) | A kind of unidirectional spacing combined curtain wall connection hanging piece | |
| CN206220625U (en) | The attachment structure of fibre reinforced composites transmission ＆ distribution electric pole | |
| CN207032245U (en) | A kind of pile pulling device of armored concrete pile for prestressed pipe | |
| CN209591609U (en) | A kind of multiply composite material strengthening core | |
| CN210041128U (en) | Insulating rolling bar that electrified was strideed across | |
| CN203020491U (en) | Carbon fiber structural component applied to bicycle | |
| CN205975361U (en) | FRP cable ground tackle | |
| CN202337910U (en) | Pull rope for fencing side slopes | |
| CN207176079U (en) | A kind of quick-mounting formula casing tube anti-corrosive apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |