CN101619574A - Prestress pulling resistant anchor pile and constructing method thereof - Google Patents
Prestress pulling resistant anchor pile and constructing method thereof Download PDFInfo
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- CN101619574A CN101619574A CN200910161845A CN200910161845A CN101619574A CN 101619574 A CN101619574 A CN 101619574A CN 200910161845 A CN200910161845 A CN 200910161845A CN 200910161845 A CN200910161845 A CN 200910161845A CN 101619574 A CN101619574 A CN 101619574A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000004568 cement Substances 0.000 claims abstract description 66
- 238000010276 construction Methods 0.000 claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 50
- 239000010959 steel Substances 0.000 claims description 50
- 238000002156 mixing Methods 0.000 claims description 35
- 238000007569 slipcasting Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000004873 anchoring Methods 0.000 claims description 17
- 238000013019 agitation Methods 0.000 claims description 10
- 235000014121 butter Nutrition 0.000 claims description 7
- 239000011440 grout Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 239000003755 preservative agent Substances 0.000 claims description 6
- 230000002335 preservative effect Effects 0.000 claims description 6
- 240000002853 Nelumbo nucifera Species 0.000 claims description 5
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 5
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000007613 slurry method Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a prestress pulling resistant anchor pile and a constructing method thereof. The constructing method is characterized by comprising the following steps: (1) constructing a cement stirring pile; (2) pre-drilling: after cement stirring pile construction is finished, a small-bore diameter driller is immediately taken to pre-drill, and the driller jets slurry and fully stirs in the center of the stirring pile; (3) drilling an anchor hole: an anchor rod driller drills after 12 hours to 14 hours of the cement stirring pile construction finishing, and the drilling speed is 200 mm/min; (4) milling a hole; (5) leading an anchor rod to penetrate through the hole; (6) grouting: the first grouting amount is based on filing up the hole, and the fullness coefficient reaches more than 1.2; after the initial setting strength of first slurry reaches 5.0MPa, the secondary high-pressure grouting can be carried out by a high-pressure grouting pipe; (7) locking stretching by a secondary stretching method; (8) leading an anchor to penetrate; (9) sealing the anchor; and (10) carrying out anticorrosive processing. The invention has high practicability and favorable social benefits.
Description
Technical field
The present invention relates to building field, particularly prestress pulling resistant anchor pile and job practices.
Background technology
In the rich groundwater area, when lower or structure base absolute altitude was low when building basement basis absolute altitude, sole plate can be subjected to bigger buoyancy.In order to prevent the sole plate come-up, to adopt pulling resistant anchor pile usually.The tradition pulling resistant anchor pile is stressed to be transmitted at the bottom of stake from the stake top, and anchoring pile is stressed to be changed with underground SEA LEVEL VARIATION, is unfavorable for the long-term resistance to plucking of anchoring pile.Can adopt prestressing technique, in advance required maximum uplift resistance be put on anchoring pile, make that anchoring pile is stressed to be transmitted to the stake top at the bottom of the stake.In this case, the stressed groundwater table that is subjected to of anchoring pile influences not quite, helps the long-term resistance to plucking of anchoring pile.
Summary of the invention
Technical problem to be solved by this invention provides a kind of prestress pulling resistant anchor pile and job practices, solves the not good problem of traditional pulling resistant anchor pile stress performance.
For this reason, the present invention has adopted the prestress pulling resistant anchor pile technology, bond the special anchoring body of formation mutually by cement mixing pile, high strength cement slurry, steel strand, the suffered pulling force of anchoring body is delivered in the stable stratum by the frictional resistance on peripheral stratum, pulling resistant anchor pile unifies through prestressed stretch-draw and sole plate, has improved anchoring pile resistance to plucking ability.
In addition, the present invention also adopts the concentricity problem that has solved anchor hole and cement mixing pile at cement mixing pile prebored hole spray mud.The cement mixing pile construction back that finishes is adopted small-bore drilling tool preboring and is sprayed for a short time of weighted mud, makes mud and cement grout mix at agitation pile, is formed centrally heavy gluey cylinder in agitation pile.Because gluey cylinder and cement mixing pile intensity differ bigger, when boring anchor hole, the relatively stable of hole wall can be guaranteed, and the concentricity of anchor hole and cement mixing pile can be guaranteed, improved brill anchor hole efficiency of construction.
Construction sequence comprises:
(1) cement mixing pile construction
Cement mixing pile construction technology program is as follows: rig is in place → and bores whitewashing → liftings down to stir → repeat down to bore to whitewash → repeat to promote and stir → repeat down 1/3 long whitewashing of brill → repeat lifting stirring → rig to be shifted.
(2) prebored hole
Transfer the small-bore drilling tool immediately after the cement mixing pile construction finishes and carry out preboring, drilling tool sprays mud, mud balance is 1.05～1.1, drilling tool fully stirs at the agitation pile center, make mud and cement grout mix, in agitation pile, be formed centrally the gluey cylinder of proportion big (1.30～1.40), when boring anchor hole, can guarantee the relatively stable of hole wall on the one hand, help anchor hole on the other hand and keep concentric with cement mixing pile.
(3) anchor hole creeps into
Jumbolter creeps into behind cement mixing pile construction finishing 12～14h, and rate of penetration is 200mm/min.
(4) hole flushing
At the bottom of the pipe patchhole with the connection air compressor machine, flushing repeatedly from lower to upper.Replenish simultaneously constantly clear water, make that the mud relative density is less than 1.05 in the hole, inner hole deposition slag thickness is less than 300mm.
(5) hole under the anchor pole
The anchor pole bottom is the break adrift form, and anchor pole is installed a fixed center support by spacing 2m, and firm with the iron wire colligation.Steel strand adopt and manually lay, and transfer by bottle gouard moved by hands in case of necessity.
(6) slip casting
First pumping clear water returns water with the mediation pipeline before the slip casting to the aperture, and the slip casting of normal pressure pumping method is adopted in the back, must not extract Grouting Pipe before the slip casting, enriches to guarantee anchor pole bottom slip casting.Grouting amount is as the criterion to fill with the hole for the first time, and fullness coefficient reaches more than 1.2.After treating that the injecting cement paste initial setting strength reaches 5.0MPa for the first time, promptly available high-pressure slip-casting pipe carries out the high-pressure slip-casting second time.Anchoring section slip casting is returned the slurry method at the bottom of adopting the hole, and Grouting Pipe is inserted into 500mm place at the bottom of the hole, with mudjack cement paste is fed the Grouting Pipe injection hole at the bottom of, cement paste outwards is full of and with air extrusion in the hole successively from boring end mouth.
(7) tensioning fixation
Tensioning fixation should carry out after cement paste intensity reaches 100%.Adopt the two times tensioning method, the controlling value of stretch-draw for the first time is 10%～20%, with the stretch-draw of single windlass symmetry, presses steady anchoring part, bearing plate, the tension steel strand.Treat that every steel strand tension is after the intact first time, carry out the stretch-draw second time again, each stretch-draw answers classification to carry out, each load is respectively 0.25,0.5,0.75,1.0,1.1 times of steel strand design pulling force, must stablize 10～20min except that afterbody, all the other every grade needs are stablized 5min, and write down the elongation of each grade steel strand respectively, in stabilization time each time, must measure anchor head displacement three times, treat to lock again when steel strand prestress is not obviously decayed.The stretch-draw principle adopts as follows: rise lotus speed per minute and should not surpass 10% of design stress, off-load speed per minute should not surpass 20% of design stress.
(8) wear anchor
The PVC overcoat of the outer steel strand of anchor pier is peeled off, the butter on the steel strand is wiped clean with cotton yarn.Steel strand are managed out by peripheral preface and center preface, penetrated anchor slab, the cover upper clip, steel strand are answered symmetry or are evenly distributed on the anchor slab.
(9) sealing off and covering anchorage
Use the unnecessary steel strand of Abrasive cutting off machine excision, ground tackle is retained 100mm outward.Adding butter with protective sleeve protects and exposes steel strand.Seal anchor head with the C40 concrete, thickness of concrete cover is not less than 100mm.
(10) preservative treatment
The anchor pole head exposes steel strand and seals with anti-corrosion resin, and bearing plate carries out antirust, preservative treatment with rustproof paint and bituminous material brushing.To be coated with rustproof paint outward to center fixture, locating rack etc. in fixed.
The present invention is applicable to building basement basis pulling resistant anchor pile, the structure base pulling resistant anchor pile that buoyancy is bigger.
Compare with traditional pulling resistant anchor pile, anchor pole is applied prestressing force can make cement mixing pile, high strength cement slurry, steel strand acting in conjunction better, thereby improved the stress performance of pulling resistant anchor pile.Employing helps anchor hole at cement mixing pile prebored hole spray mud and keeps concentric with cement mixing pile, and the anchor bolt construction quality is guaranteed, and the present invention is practical, and social benefit is good.
Description of drawings
The technological process of Fig. 1 prestress pulling resistant anchor pile
The specific embodiment
Describe in detail below in conjunction with accompanying drawing.
Certain water factory's boiler room Foundation Design, north and south is wide to be 18m, the long 21.6m of thing, all place underground, totally 2 layers.Structure types is a frame construction, basic thickness of slab 800mm, embedded depth of foundation absolute altitude-9.6m.Consider this area's underground water height, underground boiler room own wt descends buoyancy of water irresistibly.Be to solve the resistance to plucking problem of building, adopt prestress pulling resistant anchor pile, make cement mixing pile, high strength cement slurry, steel strand integral body stressed, improved the stress performance of pulling resistant anchor pile, to reach the purpose of whole building resistance to plucking.
Adopt the cement mixer rig to form cement mixing pile, after the cement mixing pile construction finishes, transfer the small-bore drilling tool immediately and carry out preboring, drilling tool sprays the little weighted mud that compares, fully stir at the agitation pile center, make mud and cement grout mix, in agitation pile, be formed centrally heavy gluey cylinder, guarantee the concentricity of anchor hole and cement mixing pile.Treat behind the drilling tool preboring of small-bore to bore anchor hole again after agitation pile reaches certain intensity, be lowered to steel wire bundle in the anchor hole after, pressure injection high-strength cement slurries.After treating that the high-strength cement slurry intensity reaches requirement, every steel strand are applied prestressing force respectively, and be locked on the sole plate and with airtight steel cap the pulling resistant anchor pile top sealed and inject butter, thereby form prestress pulling resistant anchor pile.
Construction sequence comprises:
(1) cement mixing pile construction
Cement mixing pile construction slurry water gray scale adopts 0.5, mixes 1.5% early strength admixture gypsum and 0.15% water reducing agent wood calcium.
Cement mixing pile construction technology program is as follows: rig is in place → and bores whitewashing → liftings down to stir → repeat down to bore to whitewash → repeat to promote and stir → repeat down 1/3 long whitewashing of brill → repeat lifting stirring → rig to be shifted.
Cement mixing pile rig rate of penetration is 0.8～1.0m/min, and spray pressure is controlled at 0.4～0.6MPa, creep at the bottom of the stake behind the absolute altitude, and original place whitewashing 0.5min, counter-rotating at the uniform velocity promotes again.Hoisting velocity is 0.8～1.0m/min, at the uniform velocity is promoted to overhead 0.5m place, and the stirring several seconds makes pile crown evenly closely knit.
(2) prebored hole
Transfer the small-bore drilling tool immediately after the cement mixing pile construction finishes and carry out preboring, drilling tool sprays mud, mud balance is 1.05～1.1, drilling tool fully stirs at the agitation pile center, make mud and cement grout mix, in agitation pile, be formed centrally the gluey cylinder of proportion big (1.30～1.40), when boring anchor hole, can guarantee the relatively stable of hole wall on the one hand, help anchor hole on the other hand and keep concentric with cement mixing pile.
(3) anchor hole creeps into
After the jumbolter leveling in place, conduction three-wing bit (band centralizer) direct circulation clear water creeps at the bottom of the cement mixing pile stake before adopting.
Jumbolter creeps into behind cement mixing pile construction finishing 12～14h, and rate of penetration is 200mm/min.
Keep concentric with cement mixing pile as far as possible, the deviation at anchor hole center and cement mixing pile center is no more than 10mm, with the cement mixing pile perpendicularity deviation should be less than 8%.In a single day deflection takes place in anchor hole, the pore-forming again of taking measures.
(4) hole flushing
At the bottom of the pipe patchhole with the connection air compressor machine, flushing repeatedly from lower to upper.Replenish simultaneously constantly clear water, make that the mud relative density is less than 1.05 in the hole, inner hole deposition slag thickness is less than 300mm.Carry out the aperture and safeguard, prevent in the slurry flows hand-hole.
(5) hole under the anchor pole
The anchor pole bottom is the break adrift form, and anchor pole is installed a fixed center support by spacing 2m, and firm with the iron wire colligation.Anchor pole bottom dress taper protector, protection anchor pole bottom and hole wall are not destroyed.Grouting Pipe is installed with steel strand and is carried out synchronously, is arranged on steel wire bundle central authorities, and length exceeds steel strand 2m.Steel strand adopt and manually lay, and transfer by bottle gouard moved by hands in case of necessity; Before casting anchor, steel strand quality and length need can descend in the hand-hole after related personnel's acceptance(check).
(6) slip casting
Anchor pole slurry water gray scale adopts 0.4～0.45, and the proportioning of cement grout is a cement: water: early strength admixture: expansion agent=1: (0.45～0.5): (0.007～0.01): 0.07.Require during preparation to fill up the water yield in the mixer, add cement and Admixture then while stirring, mixing time is no less than 10min.
First pumping clear water returns water with the mediation pipeline before the slip casting to the aperture, and the slip casting of normal pressure pumping method is adopted in the back, must not extract Grouting Pipe before the slip casting, enriches to guarantee anchor pole bottom slip casting.Grouting amount is as the criterion to fill with the hole for the first time, and fullness coefficient reaches more than 1.2.The slip casting operation is continuous, and Grouting Pipe wants the marginal not limit to pull out, and the tube drawing height does not exceed hole entoplasm liquid level.After treating that the injecting cement paste initial setting strength reaches 5.0MPa for the first time, promptly available high-pressure slip-casting pipe carries out the high-pressure slip-casting second time.Anchoring section slip casting is returned the slurry method at the bottom of adopting the hole, and Grouting Pipe is inserted into 500mm place at the bottom of the hole, with mudjack cement paste is fed the Grouting Pipe injection hole at the bottom of, cement paste outwards is full of and with air extrusion in the hole successively from boring end mouth.
(7) tensioning fixation
Tensioning fixation should carry out after cement paste intensity reaches 100%.Adopt the two times tensioning method, the controlling value of stretch-draw for the first time is 10%～20%, with the stretch-draw of single windlass symmetry, presses steady anchoring part, bearing plate, tension steel strand.Treat that every steel strand tension is after the intact first time, carry out the stretch-draw second time again, each stretch-draw answers classification to carry out, each load is respectively 0.25,0.5,0.75,1.0,1.1 times of steel strand design pulling force, must stablize 10～20min except that afterbody, all the other every grade needs are stablized 5min, and write down the elongation of each grade steel strand respectively, in stabilization time each time, must measure anchor head displacement three times, treat to lock again when steel strand prestress is not obviously decayed.The stretch-draw principle adopts as follows: rise lotus speed per minute and should not surpass 10% of design stress, off-load speed per minute should not surpass 20% of design stress.
(8) wear anchor
The PVC overcoat of the outer steel strand of anchor pier is peeled off, the butter on the steel strand is wiped clean with cotton yarn.Steel strand are managed out by peripheral preface and center preface, penetrated anchor slab, the cover upper clip, steel strand are answered symmetry or are evenly distributed on the anchor slab.
(9) sealing off and covering anchorage
Use the unnecessary steel strand of Abrasive cutting off machine excision, ground tackle is retained 100mm outward.Adding butter with protective sleeve protects and exposes steel strand.Seal anchor head with the C40 concrete, thickness of concrete cover is not less than 100mm.
(10) preservative treatment
The anchor pole head exposes steel strand and seals with anti-corrosion resin, and bearing plate carries out antirust, preservative treatment with rustproof paint and bituminous material brushing.For preventing that the corrosion of anchor pole structure from taking place, and will be coated with rustproof paint outward to center fixture, locating rack etc. in fixed.
After this engineering construction finished, the pulling resistant anchor pile result of use was good.
Claims (10)
1, a kind of prestress pulling resistant anchor pile and job practices is characterized in that may further comprise the steps:
(1) cement mixing pile construction
Cement mixing pile construction technology program is as follows: rig is in place → and bores whitewashing → liftings down to stir → repeat down to bore to whitewash → repeat to promote and stir → repeat down 1/3 long whitewashing of brill → repeat lifting stirring → rig to be shifted.
(2) prebored hole
Transfer the small-bore drilling tool immediately after the cement mixing pile construction finishes and carry out preboring, drilling tool sprays mud, and drilling tool fully stirs at the agitation pile center.
(3) anchor hole creeps into
Jumbolter creeps into behind cement mixing pile construction finishing 12～14h, and rate of penetration is 200mm/min.
(4) hole flushing
At the bottom of the pipe patchhole with the connection air compressor machine, flushing repeatedly from lower to upper.Replenish simultaneously constantly clear water, make that the mud relative density is less than 1.05 in the hole, inner hole deposition slag thickness is less than 300mm.
(5) hole under the anchor pole
The anchor pole bottom is the break adrift form, and anchor pole is installed a fixed center support by spacing 2m, and firm with the iron wire colligation.Steel strand adopt and manually lay, and transfer by bottle gouard moved by hands in case of necessity.
(6) slip casting
Grouting amount is as the criterion to fill with the hole for the first time, and fullness coefficient reaches more than 1.2.After treating that the injecting cement paste initial setting strength reaches 5.0MPa for the first time, promptly available high-pressure slip-casting pipe carries out the high-pressure slip-casting second time.Anchoring section slip casting is returned the slurry method at the bottom of adopting the hole, and Grouting Pipe is inserted into 500mm place at the bottom of the hole, with mudjack cement paste is fed the Grouting Pipe injection hole at the bottom of, cement paste outwards is full of and with air extrusion in the hole successively from boring end mouth.
(7) tensioning fixation
Adopt the two times tensioning method, the controlling value of stretch-draw for the first time is 10%～20%, with the stretch-draw of single windlass symmetry, presses steady anchoring part, bearing plate, tension steel strand.Treat that every steel strand tension is after the intact first time, carry out the stretch-draw second time again, each stretch-draw answers classification to carry out, each load is respectively 0.25,0.5,0.75,1.0,1.1 times of steel strand design pulling force, must stablize 10～20min except that afterbody, all the other every grade needs are stablized 5min, and write down the elongation of each grade steel strand respectively, in stabilization time each time, must measure anchor head displacement three times, treat to lock again when steel strand prestress is not obviously decayed.
(8) wear anchor
The PVC overcoat of the outer steel strand of anchor pier is peeled off, the butter on the steel strand is wiped clean with cotton yarn.Steel strand are managed out by peripheral preface and center preface, penetrated anchor slab, the cover upper clip, steel strand are answered symmetry or are evenly distributed on the anchor slab.
(9) sealing off and covering anchorage
Use the unnecessary steel strand of Abrasive cutting off machine excision, ground tackle is retained 100mm outward.Adding butter with protective sleeve protects and exposes steel strand.
(10) preservative treatment
The anchor pole head exposes steel strand and seals with anti-corrosion resin, and bearing plate carries out antirust, preservative treatment with rustproof paint and bituminous material brushing.To be coated with rustproof paint outward to center fixture, locating rack etc. in fixed.
2, prestress pulling resistant anchor pile according to claim 1 and job practices, it is characterized in that having adopted the prestress pulling resistant anchor pile technology, bond the special anchoring body of formation mutually by cement mixing pile, high strength cement slurry, steel strand, the suffered pulling force of anchoring body is delivered in the stable stratum by the frictional resistance on peripheral stratum, and pulling resistant anchor pile unifies through prestressed stretch-draw and sole plate.
3, prestress pulling resistant anchor pile according to claim 1 and 2 and job practices is characterized in that: drilling tool injection mud balance is 1.05～1.1 in step (2) the prebored hole construction.
4, prestress pulling resistant anchor pile according to claim 1 and 2 and job practices, it is characterized in that: anchor pole slurry water gray scale adopts 0.4～0.45, and the proportioning of cement grout is a cement: water: early strength admixture: expansion agent=1: (0.45～0.5): (0.007～0.01): 0.07.
5, prestress pulling resistant anchor pile according to claim 3 and job practices, it is characterized in that: anchor pole slurry water gray scale adopts 0.4～0.45, and the proportioning of cement grout is a cement: water: early strength admixture: expansion agent=1: (0.45～0.5): (0.007～0.01): 0.07.
6, prestress pulling resistant anchor pile according to claim 1 and 2 and job practices, it is characterized in that: the stretch-draw principle adopts as follows in the construction of step (7) tensioning fixation: rise lotus speed per minute and should not surpass 10% of design stress, off-load speed per minute should not surpass 20% of design stress.
7, prestress pulling resistant anchor pile according to claim 3 and job practices, it is characterized in that: the stretch-draw principle adopts as follows in the construction of step (7) tensioning fixation: rise lotus speed per minute and should not surpass 10% of design stress, off-load speed per minute should not surpass 20% of design stress.
8, prestress pulling resistant anchor pile according to claim 4 and job practices, it is characterized in that: the stretch-draw principle adopts as follows in the construction of step (7) tensioning fixation: rise lotus speed per minute and should not surpass 10% of design stress, off-load speed per minute should not surpass 20% of design stress.
9, prestress pulling resistant anchor pile according to claim 1 and 2 and job practices is characterized in that: seal anchor head with the C40 concrete in the construction of (9) sealing off and covering anchorage, thickness of concrete cover is not less than 100mm.
10, prestress pulling resistant anchor pile according to claim 3 and job practices is characterized in that: seal anchor head with the C40 concrete in the construction of (9) sealing off and covering anchorage, thickness of concrete cover is not less than 100mm.
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| CN2009101618458A CN101619574B (en) | 2009-07-28 | 2009-07-28 | Prestress pulling resistant anchor pile and constructing method thereof |
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| CN2009101618458A CN101619574B (en) | 2009-07-28 | 2009-07-28 | Prestress pulling resistant anchor pile and constructing method thereof |
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| CN101619574A true CN101619574A (en) | 2010-01-06 |
| CN101619574B CN101619574B (en) | 2011-04-13 |
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| CN115637739A (en) * | 2022-10-08 | 2023-01-24 | 浙江东南网架股份有限公司 | Prestress anti-floating anchor rod construction method based on digital simulation |
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- 2009-07-28 CN CN2009101618458A patent/CN101619574B/en not_active Expired - Fee Related
Cited By (18)
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| CN101851925A (en) * | 2010-06-03 | 2010-10-06 | 中冶集团武汉勘察研究院有限公司 | Deep mixing pile-micro pre-stressed steel pipe concrete pile-vertical anchor rod composite foundation pit support method |
| CN101886393A (en) * | 2010-07-03 | 2010-11-17 | 朱奎 | Construction method of combined foundation ditch support |
| CN102704478A (en) * | 2012-06-08 | 2012-10-03 | 黄水森 | Building anchor rod construction technology |
| CN102704478B (en) * | 2012-06-08 | 2015-04-22 | 黄水森 | Building anchor rod construction technology |
| CN102864777A (en) * | 2012-10-15 | 2013-01-09 | 河海大学 | Fast prestress anchor stock structure and construction method |
| CN103422501A (en) * | 2013-03-13 | 2013-12-04 | 中国建筑第四工程局有限公司 | Anti-floating anchor structure in sand layer geology and construction method thereof |
| CN103422501B (en) * | 2013-03-13 | 2016-01-13 | 中国建筑第四工程局有限公司 | Anti-floating anchor rod structure in sand seam geology and construction method thereof |
| CN106703065B (en) * | 2016-11-17 | 2019-02-12 | 中国电建集团贵州工程公司 | Rock-bolt blower foundation underwater construction engineering method |
| CN106703065A (en) * | 2016-11-17 | 2017-05-24 | 中国电建集团贵州工程公司 | Underwater construction method for rock anchor rod draught fan foundation |
| CN106948347A (en) * | 2017-04-01 | 2017-07-14 | 南京瑞迪建设科技有限公司 | Pile extracting method and pile pulling system |
| CN107059872A (en) * | 2017-04-01 | 2017-08-18 | 南京瑞迪建设科技有限公司 | Oblique cord pile extracting method and oblique cord pile pulling system |
| CN107059872B (en) * | 2017-04-01 | 2022-06-07 | 南京瑞迪建设科技有限公司 | Inclined cable pile pulling method and inclined cable pile pulling system |
| CN111894045A (en) * | 2020-08-17 | 2020-11-06 | 广州市设计院 | Anti-floating anchoring structure and anti-floating anchoring construction method for basement bottom plate |
| CN111851525A (en) * | 2020-08-31 | 2020-10-30 | 中建八局第二建设有限公司 | Construction method of deep foundation pit support anchor rod under complex geological condition |
| CN112709225A (en) * | 2020-12-28 | 2021-04-27 | 云南建投第二水利水电建设有限公司 | Quick construction method for shell-expanding type prestressed anchor rod |
| CN112900459A (en) * | 2021-01-27 | 2021-06-04 | 洛阳理工学院 | Composite reinforcement method for soft clay side slope |
| CN115637739A (en) * | 2022-10-08 | 2023-01-24 | 浙江东南网架股份有限公司 | Prestress anti-floating anchor rod construction method based on digital simulation |
| CN115839083A (en) * | 2022-12-05 | 2023-03-24 | 中建八局第二建设有限公司 | Construction method for reinforcing single prestressed anchor rod combined foundation |
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