CN104047287A - Prestressed sleeve self-lock anchor rod - Google Patents

Prestressed sleeve self-lock anchor rod Download PDF

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Publication number
CN104047287A
CN104047287A CN201410245520.9A CN201410245520A CN104047287A CN 104047287 A CN104047287 A CN 104047287A CN 201410245520 A CN201410245520 A CN 201410245520A CN 104047287 A CN104047287 A CN 104047287A
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CN
China
Prior art keywords
prestressed
self
draw
bar
locking head
Prior art date
Application number
CN201410245520.9A
Other languages
Chinese (zh)
Inventor
马逸鹄
杨州
沈卫明
施辉
陈晓辉
Original Assignee
江苏金海新能源科技有限公司
内蒙古金海新能源科技股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 江苏金海新能源科技有限公司, 内蒙古金海新能源科技股份有限公司 filed Critical 江苏金海新能源科技有限公司
Priority to CN201410245520.9A priority Critical patent/CN104047287A/en
Publication of CN104047287A publication Critical patent/CN104047287A/en

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Abstract

A prestressed sleeve self-lock anchor rod is characterized in that a fixing steel sleeve and a six-petal expansion self-lock head are welded, a threaded connection ring and the fixing steel sleeve are welded, a tool steel sleeve and the threaded connection ring are connected by threads, a prestressed pull rod penetrates, a thick cushion plate is additionally arranged on the upper end, an upper nut is screwed, and a truncated frustum extrusion head is additionally arranged at the lower end, then the whole set of anchor is formed; a thermal plastic sleeve sleeves an anchor rod and is sheathed on the whole anchor rod; the thermal plastic sleeve protects the prestressed pull rod from being rusted, enables the anchor rod to slide in concrete and is stable in anti-pulling performance; the fatigue stress amplitude of the anchor rod under the fatigue vibration pull force is about one fourth of a common anchor rod and is good in anti-fatigue performance. Rock holes are fully grouted to ensure that rock at the self-lock head is pressed from three directions, the strength is improved, the seepage force of grout is enhanced and the grout is greatly saved by designing seal rings, the applicable range of the anchor rod is enlarged by arranging the tool steel sleeve, and the economy aim for anchoring a deeper rock stratum can also be achieved.

Description

Prestressed casing self-locking head anchor pole
Technical field
The invention belongs to the technical field that existing concrete foundation is reinforced, relate to a kind of prestressed anchor for Foundation Design band self-locking head, be specifically related to a kind of prestressed casing self-locking head anchor pole.
Background technology
Anchor pole is the highly efficient process of foundation anti-pulling on rock foundation.Anchor pole inserts in rock-boring, and after injected water cement mortar, knot is hard, produces anchored force by the bond stress between anchor pole and cement mortar, cement mortar and rock.Due to the inhomogeneities of rock and the fragility of rock and mortar, its shear-carrying capacity variation is larger.Particularly blower foundation etc. is born to tired power actuated anchor pole, the bonding crack of may bringing of material fragility produces and expands, thereby causes fatigue failure.Therefore,, by the stable not durable not anchorage effect of this fragility, change into after can expanding anchor pole head and being squeezed and compress rock by inclined plane principle.Rock pressurized quite stable, by this stable pressure generation frictional force, is self-locking in rock hole anchor pole.Then use cement mortar closed protective anchor head, to protect the antifatigue power performance of anchor pole.In addition, anchor pole applies prestressing force also can reduce the internal force variation of anchor pole under external tensile force effect, reduces the Fatigue Stress Amplitude causing thus, also favourable to antifatigue.
Summary of the invention
For the deficiency in existing technology, the object of this invention is to provide a kind of antifatigue power performance that can protect anchor pole, anchor pole is applied to a kind of prestressed casing self-locking head anchor pole that prestressing force changes to reduce the internal force of anchor pole under external tensile force effect.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of prestressed casing self-locking head anchor pole, comprise prestressed draw-bar, tool-type steel sleeve, truncated cone-shaped extrusion head, six lobes expand self-locking head, thermoplastic sheath, top nut, hassock plate, rock foundation, armature boring, steel concrete cushion cap, support, grouting material, stirrup, sealing plate, grout pipe, screw shackle, stationary steel bushing pipe, hydraulic stretching device, it is characterized in that described stationary steel bushing pipe and six lobes expand self-locking head welding, screw shackle and the welding of stationary steel bushing pipe, tool-type steel sleeve and screw shackle are with being threaded, and penetrate prestressed draw-bar, the top nut of screwing on again of upper end thickening backing plate, lower end adds truncated cone-shaped extrusion head, form a whole set of anchor, thermoplastic sheath is outside prestressed draw-bar, be enclosed within on whole prestressed draw-bar, the protection not corrosion of prestressed draw-bar of thermoplastic sheath also can slide anchor pole in concrete.
Further illustrate the present invention, above-mentioned a whole set of anchor is put into armature boring, the supporting leg of hydraulic stretching device is pressed on hassock plate, stretch-draw prestressing force pull bar, truncated cone-shaped extrusion head and six lobes expand jam-packed between self-locking head.Force truncated cone-shaped extrusion head plastic strain laterally expansion to compress armature boring, produce self-locking action, then inject below grouting material by grout pipe to sealing plate.Treat to loosen top nut after the arrival of grouting material intensity, take off hassock plate, throw formula steel sleeve also takes out tool-type steel sleeve and grout pipe, (parts that take off treat that anchor pole is reused below).The intensity of construction foundation platform reaches after technological requirement, and its upper end puts hassock plate and top nut, by design code stretch-draw, screws top nut, loosens tensioner.
Further illustrate the present invention, a kind of prestressed anchor with enlarged footing, the hole that does not insert preboring under Prestressing state is in place, then applies pretension and produces self-locking.Build again grouting material auxiliary fixing, finally reach the effect of bottom anchor.
The present invention is compared with enlarged footing anchor pole of the prior art, and usefulness is:
Extraction-resistant behavior is stable, to resisting fatigue vibration pull out force, is obviously better than the mortar bond stress between anchor pole and rock especially.Prestressed anchor 1/4 left and right that Fatigue Stress Amplitude is common bolt under the effect of Fatigue Vibration pulling force, anti-fatigue performance is good.Be combined with rock pore in the effective grouting material of stationary steel bushing bottom.Bending resistance is combined on top, and to cut performance good with prefabricated foundation, is not also subject to that pretension is lax affects (specification allows pretension can have the lax of 10% left and right).In petrosal foramen, grouting fully can guarantee that self-locking head place rock is in three dimension stress, improves intensity.Construction equipment is simple, is as good as with general anchor pole.The design of sealing ring, has strengthened the penetration of grouting material and has significantly saved grouting material.The accommodation that is arranged so that anchor pole of tool-type steel sleeve expands, and also can reach the object of economy to the darker rock stratum of anchorage depth.
Brief description of the drawings
Fig. 1 is that state profile is transferred in installation of the present invention.
Fig. 2 is grouting state profile in place of the present invention.
Fig. 3 is final tensile state sectional drawing of the present invention.
Fig. 4 is top view of the present invention.
In Fig. 1, Fig. 2, Fig. 3, Fig. 4: 1-prestressed draw-bar, 2-tool-type steel sleeve, 3-truncated cone-shaped extrusion head, 4-six lobes expand self-locking head, 5-thermoplastic sheath, 6-top nut, 7-hassock plate, 8-rock foundation, 9-armature boring, 10-steel concrete cushion cap, 11-support, 12-grouting material, 13-stirrup, 14-sealing plate, 15-grout pipe, 16-screw shackle, 17-stationary steel bushing pipe, 18-hydraulic stretching device.
Detailed description of the invention
Further illustrate the present invention below in conjunction with Figure of description.
A kind of prestressed casing self-locking head anchor pole, comprise that prestressed draw-bar 1, tool-type steel sleeve 2, truncated cone-shaped extrusion head 3, six lobes expand self-locking head 4, thermoplastic sheath 5, top nut 6, hassock plate 7, rock foundation 8, armature boring 9, steel concrete cushion cap 10, support 11, grouting material 12, stirrup 13, sealing plate 14, grout pipe 15, screw shackle 16, stationary steel bushing pipe 17, hydraulic stretching device 18, it is characterized in that described stationary steel bushing pipe 17 and six lobes expand self-locking head 4 and weld; Screw shackle 16 and stationary steel bushing pipe 17 weld; Tool-type steel sleeve 2 and screw shackle 16 use are threaded, and penetrate prestressed draw-bar 1, the top nut 6 of screwing on again of upper end thickening backing plate 7, and lower end adds truncated cone-shaped extrusion head 3, forms a whole set of anchor; Thermoplastic sheath 5, outside prestressed draw-bar 1, is enclosed within on whole prestressed draw-bar 1.Thermoplastic sheath 5 is protected prestressed draw-bar 1 not corrosion and anchor pole can be slided in concrete.
Further illustrate the present invention, above-mentioned a whole set of anchor is put into armature boring 9, the supporting leg of hydraulic stretching device 18 is pressed on hassock plate 7, stretch-draw prestressing force pull bar 1, truncated cone-shaped extrusion head 3 and six lobes expand jam-packed between self-locking head 4.Force truncated cone-shaped extrusion head 3 plastic strain laterally expansion to compress armature boring 9, produce self-locking action, then below 14, inject grouting material 12 to sealing plate by grout pipe 15.Treat to loosen top nut 6 after grouting material 12 intensity arrival, take off hassock plate 7, throw formula steel sleeve 2 also takes out tool-type steel sleeve 2 and grout pipe 15, (parts that take off treat that anchor pole is reused below).The intensity of construction foundation platform 10 reaches after technological requirement, and its upper end puts hassock plate 7 and top nut 6, by design code stretch-draw, screws top nut 6, loosens tensioner.
Further illustrate the present invention, a kind of prestressed anchor with enlarged footing, the hole that does not insert preboring under Prestressing state is in place, then applies pretension and produces self-locking.Build again grouting material auxiliary fixing, finally reach the effect of bottom anchor.
Further illustrating construction sequence of the present invention is:
1, its aperture ratio six lobes of the impact drilling expand the large 10mm of external diameter of self-locking head 4; For diameter 3-3.5 times of prestressed draw-bar 1.
2, prestressed draw-bar 1, tool-type steel sleeve 2 and grout pipe 15 are put into hole in the lump, support 11 makes the above ground portion of prestressed draw-bar 1 vertical.
3, arrive after design pretension in prestressed draw-bar 1 top stretch-draw, tighten top nut 6.
4, from grout pipe 15, pour into grouting material 12, wait for that it solidifies.
5, stretch-draw prestressing force pull bar 1 again, twists and goes top nut 6, then remove hassock plate 7, removes auxiliary stand 11, backs out tool-type steel sleeve 2.
6,, there is thermoplastic cover on construction basis (prefabricated or cast-in-place) on correspondence position separately, maintenance foundation concrete between basis and bolt.
7, stretch-draw prestressing force pull bar 1 is to regulation pretension.

Claims (8)

1. a prestressed casing self-locking head anchor pole, comprise prestressed draw-bar, tool-type steel sleeve, truncated cone-shaped extrusion head, six lobes expand self-locking head, thermoplastic sheath, top nut, hassock plate, rock foundation, armature boring, steel concrete cushion cap, support, grouting material, stirrup, sealing plate, grout pipe, screw shackle, stationary steel bushing pipe, hydraulic stretching device, it is characterized in that described stationary steel bushing pipe and six lobes expand self-locking head welding, screw shackle and the welding of stationary steel bushing pipe, tool-type steel sleeve and screw shackle are with being threaded, and penetrate prestressed draw-bar, the upper end thickening backing plate nut of screwing on again, lower end adds truncated cone-shaped extrusion head, form a whole set of anchor, thermoplastic sheath is outside prestressed draw-bar, be enclosed within on whole prestressed draw-bar.
2. a kind of prestressed casing self-locking head anchor pole according to claim 1, is characterized in that described not corrosion of thermoplastic sheath protection prestressed draw-bar, and prestressed draw-bar can be slided in concrete.
3. a kind of prestressed casing self-locking head anchor pole according to claim 1, it is characterized in that described a whole set of anchor being put into armature boring, the supporting leg of hydraulic stretching device is pressed on hassock plate, stretch-draw prestressing force pull bar, truncated cone-shaped extrusion head and six lobes expand jam-packed between self-locking head, make truncated cone-shaped extrusion head plastic strain laterally expansion compress armature boring, produce self-locking action.
4. a kind of prestressed casing self-locking head anchor pole according to claim 1, it is characterized in that the described grout pipe that passes through injects grouting material below to sealing plate, treat to loosen top nut after the arrival of grouting material intensity, take off hassock plate, throw formula steel sleeve also takes out tool-type steel sleeve and grout pipe.
5. a kind of prestressed casing self-locking head anchor pole according to claim 1, is characterized in that described the hassock plate taking off, throw formula steel sleeve, tool-type steel sleeve, grout pipe are reusable.
6. a kind of prestressed casing self-locking head anchor pole according to claim 1, is characterized in that the intensity of described construction foundation platform reaches after technological requirement, and its upper end puts hassock plate and top nut, by design code stretch-draw, screws top nut, loosens tensioner.
7. a kind of prestressed casing self-locking head anchor pole according to claim 1, it is characterized in that described prestressed casing self-locking head anchor pole inserts the hole of preboring under Prestressing state not in place, then apply pretension and produce self-locking, build again grouting material auxiliary fixing, finally reach the effect of bottom anchor.
8. a kind of prestressed casing self-locking head anchor pole according to claim 1, is characterized in that described implementation step is:
(1) its aperture ratio six lobes of the impact drilling expand the large 10mm of external diameter of self-locking head, are diameter 3-3.5 times of prestressed draw-bar,
(2) prestressed draw-bar, tool-type steel sleeve and grout pipe are put into hole in the lump, support makes the above ground portion of prestressed draw-bar vertical,
(3) arrive after design pretension in the stretch-draw of prestressed draw-bar top, tighten top nut,
(4) from grout pipe, pour into grouting material, wait for that it solidifies,
(5) stretch-draw prestressing force pull bar again, twists and goes top nut, then remove hassock plate, removes auxiliary stand, backs out tool-type steel sleeve,
(6) on correspondence position, construct and have thermoplastic cover separately between basis and bolt, maintenance foundation concrete,
(7) stretch-draw prestressing force pull bar is to specifying pretension.
CN201410245520.9A 2014-05-26 2014-05-26 Prestressed sleeve self-lock anchor rod CN104047287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410245520.9A CN104047287A (en) 2014-05-26 2014-05-26 Prestressed sleeve self-lock anchor rod

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Application Number Priority Date Filing Date Title
CN201410245520.9A CN104047287A (en) 2014-05-26 2014-05-26 Prestressed sleeve self-lock anchor rod

Publications (1)

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CN104047287A true CN104047287A (en) 2014-09-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105756081A (en) * 2016-05-05 2016-07-13 江苏金海新能源科技有限公司 Self-tapered end prestress wire circular truncated cone concrete drum offshore wind turbine foundation and construction method thereof
CN105862859A (en) * 2016-05-27 2016-08-17 昆明军龙岩土工程有限公司 Thick steel bar prestress anchor rod tensioning method
CN105986572A (en) * 2015-03-01 2016-10-05 方军 Self-locking type pull-resisting anchor head

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2423318Y (en) * 2000-06-01 2001-03-14 东北大学 Explosion expanded rockbolt
CN1544798A (en) * 2003-11-11 2004-11-10 吴德兴 Shell expansion type rock bolt
CN2773312Y (en) * 2005-02-04 2006-04-19 上海禧龙工程安装有限公司 Assembled slip-casting roofbolt
CN102051880A (en) * 2010-12-31 2011-05-11 杭州图强工程材料有限公司 Detachable anchor
CN103103989A (en) * 2011-11-12 2013-05-15 杨学祥 End-expansive recoverable anchor rod
KR20130113563A (en) * 2012-04-06 2013-10-16 주식회사 삼우기초기술 Compression and distribution type permanent anchor being able to replace the tension member of the free length range

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2423318Y (en) * 2000-06-01 2001-03-14 东北大学 Explosion expanded rockbolt
CN1544798A (en) * 2003-11-11 2004-11-10 吴德兴 Shell expansion type rock bolt
CN2773312Y (en) * 2005-02-04 2006-04-19 上海禧龙工程安装有限公司 Assembled slip-casting roofbolt
CN102051880A (en) * 2010-12-31 2011-05-11 杭州图强工程材料有限公司 Detachable anchor
CN103103989A (en) * 2011-11-12 2013-05-15 杨学祥 End-expansive recoverable anchor rod
KR20130113563A (en) * 2012-04-06 2013-10-16 주식회사 삼우기초기술 Compression and distribution type permanent anchor being able to replace the tension member of the free length range

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105986572A (en) * 2015-03-01 2016-10-05 方军 Self-locking type pull-resisting anchor head
CN105756081A (en) * 2016-05-05 2016-07-13 江苏金海新能源科技有限公司 Self-tapered end prestress wire circular truncated cone concrete drum offshore wind turbine foundation and construction method thereof
CN105862859A (en) * 2016-05-27 2016-08-17 昆明军龙岩土工程有限公司 Thick steel bar prestress anchor rod tensioning method

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Application publication date: 20140917

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