CN102587366A - Self-drilling type spiral anchor rod and construction process using self-drilling type spiral anchor rod for grouting along with drilling, stirring and curing - Google Patents

Self-drilling type spiral anchor rod and construction process using self-drilling type spiral anchor rod for grouting along with drilling, stirring and curing Download PDF

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Publication number
CN102587366A
CN102587366A CN2012100643187A CN201210064318A CN102587366A CN 102587366 A CN102587366 A CN 102587366A CN 2012100643187 A CN2012100643187 A CN 2012100643187A CN 201210064318 A CN201210064318 A CN 201210064318A CN 102587366 A CN102587366 A CN 102587366A
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China
Prior art keywords
anchor rod
self
rod body
drilling
helical blade
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Pending
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CN2012100643187A
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Chinese (zh)
Inventor
于华
刘文清
潘景龙
郭斌
辛圳
杨月刚
王颖娟
史青芬
张军
夏清策
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Sinopec Petroleum Engineering Corp
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Shengli Engineering Construction Group Co Ltd
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Priority to CN2012100643187A priority Critical patent/CN102587366A/en
Publication of CN102587366A publication Critical patent/CN102587366A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a self-drilling type spiral anchor rod and a construction process using the self-drilling type spiral anchor rod for grouting along with drilling, stirring and curing, which are suitable for support engineering of anchor-pulling slopes in weak soil regions. A paste outlet is arranged on a rod body of the spiral anchor rod, the front end of the rod body of the anchor rod is enclosed, a spiral vane is welded at the front end of the rod body of the anchor rod, and a stirring slice is welded behind the spiral vane on the rod body of the anchor rod. The construction process using the self-drilling type spiral anchor rod for grouting along with drilling, stirring and curing comprises the following steps of: injecting cement paste while drilling by rod body of the anchor rod, so that a paste body of the cement paste is ejected out of the paste outlet of the rod body of the anchor rod, mixing the paste body and a soil body cut by using the spiral vane on the front end, uniformly stirring the soil body and the cement paste by using the stirring slice arranged behind the spiral vane, forming an irregular anchor body after curing so that the anchoring force of the anchor rod is increased. Because the drilling and the grouting are integrated, the pressure influence of subsequent grouting on the side wall of a foundation pit is avoided; and meanwhile, the grouting pressure can be effectively controlled so that the grouting quality can be ensured.

Description

A kind of self-drilling spiral anchor rod and stir and solidify construction technology with boring slip casting
Technical field
The present invention relates to the construction equipment and the job practices of building operations foundation pit supporting project; Particularly a kind of self-drilling spiral anchor rod and stir and solidify construction technology with boring slip casting; Be applicable to that the soft clay area anchor draws the support engineering of side slope, especially be applicable in the foundation pit supporting project of the soft clay area infrastructure that the Huanghe delta is such.
Background technology
Area, the Huanghe delta belongs to the alluvial plain of cohesive soil, silt and the flour sand formation of recent deposit in the Quaternary Period, and bury of groundwater is more shallow, generally is no more than 1m.
To the soft clay area of rich groundwater,, generally do not allow to cheat outer precipitation in order to keep the foundation ditch external environment unaffected.Outside can not cheating under the situation of precipitation; The preexisting hole prestressed anchor construction technology that traditional foundation pit supporting project adopts; Because construction sequence is more loaded down with trivial details, mechanically actuated is complicated, and the easy generation reasons such as drift sand phenomenon and efficiency of construction are low of leaking make it be difficult to realize.Outside the hole, do not carry out under the situation of precipitation, the formula technology of ramming is fit to the pattern foundation pit supporting structure anchor bolt construction of the soft clay area of rich groundwater very much, carries out pattern foundation pit supporting structure, has certain drawback but adopt the formula of ramming to be driven into prestressed anchor in this kind area.The front end of this anchor pole is flat-shaped, and the body of rod is provided with slurry outlet, rams stratum cement injection more earlier.In its slip casting process, slip casting time, grouting pressure, grouting amount are difficult to control, cause slip casting effect to receive very big influence, can't reach the prestressing force effect of expection.At present job site anchor pole commonly used also has the preexisting hole anchor pole, and this anchor pole is on foundation pit walls, to hole by designing requirement length, after the boring with steel strand or reinforcing bar together with Grouting Pipe, like pvc pipe, together put into the hole, carry out slip casting then.This technology construction cost is low, but after preexisting hole is used in the saturated soft soil area, causes the hole phenomenon of collapsing easily, has seriously reduced operating efficiency, and adopts the slip casting effect of grouting behind shaft or drift lining also undesirable.
Summary of the invention
The purpose of this invention is to provide a kind of self-drilling spiral anchor rod and stir and solidify construction technology, can in the foundation pit supporting project of the soft formation of similar Huanghe delta soft clay area, use with boring slip casting.Solve bad, the hypodynamic problem of tension of bolt grouting effect in the present soft clay area foundation pit supporting project.
Technical solution of the present invention is:
A kind of self-drilling spiral anchor rod comprises anchor rod body, and its body of rod is provided with slurry outlet, and the sealing of the front end of anchor rod body is welded on the front end of anchor rod body with helical blade, on the anchor rod body of helical blade back, welds stirring piece.
Construction technology is solidified in stirring with brill slip casting of a kind of self-drilling spiral anchor rod; Multifunctional drill and Grouting Pipe are connected with the rear end of anchor rod body or are connected with the rear end of lengthening anchor pole, cement injection when anchor rod body creeps into, the marginal not slurry is crept on the limit; Its slurry is penetrated from the slurry outlet of anchor rod body; With front end helical blade cutting down the soil body stirs and lumps together, the stirring piece that helical blade is provided with at the back evenly stirs the soil body and cement paste; Solidify the back and form irregular anchoring body, increase its anchored force.
The present invention has following significant effect:
The present invention can integrate preexisting hole anchor pole and the advantage of ramming the formula anchor pole, is applicable to the outer not situation of precipitation in hole, adopts slurry outlet and stirs curing process with boring slip casting, and slip casting effect is good.Use the self-drilling spiral anchor rod to creep into, adopt the pile-anchor retaining mode, the duration is short, and construction costs is lower, does not influence basement structure construction.Creeping into slip casting of self-drilling spiral anchor rod is integrated, and the pressure influence of having avoided grouting behind shaft or drift lining that foundation pit side-wall is produced can effectively be controlled grouting pressure simultaneously, can guarantee grouting quality.Through spiral anchor rod is applied prestressing force, can the ACTIVE CONTROL soil deformation, adjustment soil body stress state helps the stability of side slope.This self-drilling spiral anchor rod working security is high, and uplift resistance is strong, more can guarantee surrounding enviroment safety.Be mainly reflected in:
1, the self-drilling spiral anchor rod among the present invention is simple for production; Simple structure through the welding helical blade in the anchor pole end, has extremely strong penetration power at this blade of soft clay area; Reduced and crept into difficulty, and the form of structure of helical blade can improve the uplift resistance of anchor pole in each soil layer effectively.
2, use screwed seamless steel pipe material among the present invention, when cooperating helical blade to accomplish boring, improved the side friction of anchor rod body.
3, the slurry outlet on the self-drilling spiral anchor rod of the present invention is positioned at the helical blade rear side, in the process of anchor pole rotation propelling soil layer, carries out slip casing by pressure, and slurry penetrates from slurry outlet; With front end helical blade cutting down the soil body stirs and lumps together, helical blade is provided with stirring piece at the back, can the soil body and cement paste evenly be stirred; The soil body is fully combined with slurry; Solidify the back and form irregular anchoring body, increase its anchored force, guarantee the validity of its support engineering.
4, structure design of the present invention is simple, is easy to construction, and construction technology is safe and reliable.Through enforcement of the present invention, improved efficiency of construction and construction quality, improved economic benefit.
Description of drawings
Accompanying drawing is the structural representation of self-drilling spiral anchor rod of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description; Referring to accompanying drawing; A kind of self-drilling spiral anchor rod comprises anchor rod body 3, and its body of rod is provided with slurry outlet 2, the front end sealing of anchor rod body 3; Helical blade 1 is welded on the front end of anchor rod body 3, welding stirring piece 4 on the anchor rod body 3 of helical blade 1 back.The slurry outlet 2 of a kind of embodiment is arranged on the anchor rod body 3 of helical blade 1 rear side, and its aperture is 4mm-8mm, like 5mm, 7mm, 8mm etc.Slurry outlet 2 is set directly at 3 last times of anchor rod body, and its aperture is smaller, can strengthen its jet power, prevents that the soil body from stopping up slurry outlet 2.The slurry outlet 2 of another kind of embodiment is the outlet pipes that are welded on the anchor rod body 3; Be arranged on the rear side of helical blade 1; Its outlet pipe is straight tube or conical pipe, and its nozzle diameter is 8mm-12mm, like 9mm, 10mm or the like; The outlet pipe that uses welding helps more preventing that as slurry outlet 2 earth from stopping up.Anchor rod body 3 is seamless threaded steel pipes, and its front end is provided with a helical blade 1 at least, and this helical blade 1 is more conducive to creep into apart from the leading section 10cm-15cm of anchor rod body 3; Spacing between the helical blade 1 is at 25cm-35cm, and the spiral angle of helical blade 1 and anchor rod body 3 is between 28 degree-32 degree; The 15cm-25cm place is provided with stirring piece 4 in helical blade 1 back.Stirring piece 4 is crisscross arranged on anchor rod body 3, is provided with 3 at least, and the spacing between the stirring piece 4 is between 15cm-25cm, and the angle of anchor rod body 3 is between 40 degree-50 degree.Illustrated helical blade 1 is provided with 2, and stirring piece 4 is provided with 4.The rear end of anchor rod body 3 connects lengthening anchor pole 6 through adapter sleeve 5, more is applicable to dark and big foundation pit supporting project.
That uses a kind of self-drilling spiral anchor rod stirs the curing construction technology with boring slip casting; Multifunctional drill and Grouting Pipe are connected with the rear end of anchor rod body 3 or are connected with the rear end of lengthening anchor pole 6, cement injection when anchor rod body 3 creeps into, the marginal not slurry is crept on the limit; Its slurry is penetrated from the slurry outlet 2 of anchor rod body 3; With front end helical blade 1 cutting down the soil body stirs and lumps together, the stirring piece 4 that helical blade 1 back is provided with evenly stirs the soil body and cement paste; Solidify the back and form irregular anchoring body, increase its anchored force.During cement injection is 2 Mpa-5Mpa with boring grouting pressure, can be according to the actual size and place position of stratum adjustment grouting pressure of anchoring body; The water/binder ratio of cement paste is 0.45:1-0.50:1.
According to the construction characteristic of this self-drilling spiral anchor rod, adopting model is that MDL-120D1 type multifunctional drill is drilling construction equipment and slip casting simultaneously.During use, the power adapter sleeve of MDL-120D1 type multifunctional drill is connected with the rear end of anchor rod body 3 or with the rear end of lengthening anchor pole 6, the anti-drilling joint of power adapter sleeve rear end is connected with Grouting Pipe and passes through Grouting Pipe is connected with grouting equipment.
After treating that anchoring body reaches the requirement of strength of design, again this spiral anchor rod is applied prestressing force.At first channel-section steel is suspended on this anchor pole, can acts synergistically, add a liner plate in the stretch-draw side of channel-section steel for making this anchor pole and waist rail, after the stretch-draw with locked with bolts.Tensioning fixation should notice that each parts combines closely, should after applying prestressing force, continue bolt to be locked in ten minutes again, and the prestressing force that applies with assurance reaches designing requirement.

Claims (8)

1. self-drilling spiral anchor rod; Comprise anchor rod body (3); Its body of rod is provided with slurry outlet (2), it is characterized in that the front end sealing of anchor rod body (3); Helical blade (1) is welded on the front end of anchor rod body (3), goes up welding stirring piece (4) at the anchor rod body (3) of helical blade (1) back.
2. a kind of self-drilling spiral anchor rod according to claim 1 is characterized in that, said slurry outlet (2) is arranged on the anchor rod body (3) of helical blade (1) rear side, and its aperture is 4mm-8mm.
3. a kind of self-drilling spiral anchor rod according to claim 1 is characterized in that, and is described Go outSlurry hole (2) is the outlet pipe that is welded on the anchor rod body (3), is arranged on the rear side of helical blade (1), and its outlet pipe is straight tube or conical pipe, and its nozzle diameter is 8mm-12mm.
4. according to claim 1 or 2 or 3 described a kind of self-drilling spiral anchor rods; It is characterized in that; Described anchor rod body (3) is seamless threaded steel pipe, and its front end is provided with a helical blade (1) at least, and this helical blade (1) is apart from the leading section 10cm-15cm of anchor rod body (3); Spacing between the helical blade (1) is at 25cm-35cm, and the spiral angle of helical blade (1) and anchor rod body (3) is between 28 degree-32 degree; The 15cm-25cm place is provided with stirring piece (4) in helical blade (1) back.
5. a kind of self-drilling spiral anchor rod according to claim 4; It is characterized in that; Described stirring piece (4) is crisscross arranged on anchor rod body (3); At least be provided with 3, the spacing between the stirring piece (4) is between 15cm-25cm, and the angle of anchor rod body (3) is between 40 degree-50 degree.
6. a kind of self-drilling spiral anchor rod according to claim 5 is characterized in that, the rear end of described anchor rod body (3) connects lengthening anchor pole (6) through adapter sleeve (5).
7. that uses claim 1 a self-drilling spiral anchor rod stirs the curing construction technology with boring slip casting, it is characterized in that cement injection when anchor rod body (3) creeps into; The marginal not slurry is crept on the limit; Its slurry is penetrated from the slurry outlet (2) of anchor rod body (3), with front end helical blade (1) cutting down the soil body stirs and lumps together the stirring piece (4) that helical blade (1) back is provided with; The soil body and cement paste are evenly stirred, solidify the back and form irregular anchoring body.
8. according to claim 7ly stir and solidify construction technology with boring slip casting, it is characterized in that, during said cement injection is 2 Mpa-5Mpa with boring grouting pressure, and the water/binder ratio of cement paste is 0.45:1-0.50:1.
CN2012100643187A 2012-03-13 2012-03-13 Self-drilling type spiral anchor rod and construction process using self-drilling type spiral anchor rod for grouting along with drilling, stirring and curing Pending CN102587366A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102507246A (en) * 2011-11-03 2012-06-20 中国地质大学(武汉) Experimental tank for testing performance of grouting while drilling
CN102839661A (en) * 2012-09-20 2012-12-26 严平 Construction technology of reelingly stirring to eject anchor tube pile
CN103114865A (en) * 2013-03-08 2013-05-22 安徽省煤炭科学研究院 Vane-type stirring anchor cable
CN104141305A (en) * 2014-07-30 2014-11-12 武汉武大巨成结构股份有限公司 Multi-layer spiral blade self-drilling-type soil anchor rod and constructing method thereof
CN107447755A (en) * 2017-08-25 2017-12-08 中铁建设集团有限公司 A kind of anchor pole equipment and armature boring construction method
CN109098743A (en) * 2018-08-20 2018-12-28 中国矿业大学 A kind of new type mining steel tendon
CN109969341A (en) * 2019-03-27 2019-07-05 浙江大学 A kind of the novel slurry filling Screw Anchor and its installation method of expansible multilayer sidewall
CN114319342A (en) * 2022-01-06 2022-04-12 中冶成都勘察研究总院有限公司 Novel construction method of anti-floating anchor rod

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2129880B2 (en) * 1970-06-25 1975-08-07 Chamberlain, Anna Barbara Ground anchor
CN1106096A (en) * 1994-01-28 1995-08-02 冶金工业部沈阳勘察研究院 Pipe anchor rod technology and its anchor rod
CN2777045Y (en) * 2005-03-21 2006-05-03 严平 Cement blending anchor tube pile
CN201053298Y (en) * 2007-01-26 2008-04-30 永城煤电集团有限责任公司 Dust-proof water-injection type screwy reclaiming anchor bar drill pipe
CN201292529Y (en) * 2008-11-14 2009-08-19 方远建设集团股份有限公司 Mixing anchor rod
CN102182180A (en) * 2011-04-01 2011-09-14 威海建设集团股份有限公司 Rotary extrusion sleeve anchor rod and construction method thereof
CN202482860U (en) * 2012-03-13 2012-10-10 胜利油田胜利工程建设(集团)有限责任公司 Self-drilling helical anchor rod

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2129880B2 (en) * 1970-06-25 1975-08-07 Chamberlain, Anna Barbara Ground anchor
CN1106096A (en) * 1994-01-28 1995-08-02 冶金工业部沈阳勘察研究院 Pipe anchor rod technology and its anchor rod
CN2777045Y (en) * 2005-03-21 2006-05-03 严平 Cement blending anchor tube pile
CN201053298Y (en) * 2007-01-26 2008-04-30 永城煤电集团有限责任公司 Dust-proof water-injection type screwy reclaiming anchor bar drill pipe
CN201292529Y (en) * 2008-11-14 2009-08-19 方远建设集团股份有限公司 Mixing anchor rod
CN102182180A (en) * 2011-04-01 2011-09-14 威海建设集团股份有限公司 Rotary extrusion sleeve anchor rod and construction method thereof
CN202482860U (en) * 2012-03-13 2012-10-10 胜利油田胜利工程建设(集团)有限责任公司 Self-drilling helical anchor rod

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102507246A (en) * 2011-11-03 2012-06-20 中国地质大学(武汉) Experimental tank for testing performance of grouting while drilling
CN102507246B (en) * 2011-11-03 2013-12-18 中国地质大学(武汉) Experimental tank for testing performance of grouting while drilling
CN102839661A (en) * 2012-09-20 2012-12-26 严平 Construction technology of reelingly stirring to eject anchor tube pile
CN103114865A (en) * 2013-03-08 2013-05-22 安徽省煤炭科学研究院 Vane-type stirring anchor cable
CN104141305A (en) * 2014-07-30 2014-11-12 武汉武大巨成结构股份有限公司 Multi-layer spiral blade self-drilling-type soil anchor rod and constructing method thereof
CN104141305B (en) * 2014-07-30 2016-08-24 武大巨成结构股份有限公司 A kind of multi-layer helical blade self-drilling type soil anchor bolt and construction method thereof
CN107447755A (en) * 2017-08-25 2017-12-08 中铁建设集团有限公司 A kind of anchor pole equipment and armature boring construction method
CN109098743A (en) * 2018-08-20 2018-12-28 中国矿业大学 A kind of new type mining steel tendon
CN109969341A (en) * 2019-03-27 2019-07-05 浙江大学 A kind of the novel slurry filling Screw Anchor and its installation method of expansible multilayer sidewall
CN109969341B (en) * 2019-03-27 2020-08-04 浙江大学 Grouting spiral anchor with expandable multilayer side wall and mounting method thereof
CN114319342A (en) * 2022-01-06 2022-04-12 中冶成都勘察研究总院有限公司 Novel construction method of anti-floating anchor rod
CN114319342B (en) * 2022-01-06 2023-08-11 中冶成都勘察研究总院有限公司 Construction method of anti-floating anchor rod

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Application publication date: 20120718