CN104532860B - Recoverable soil nail - Google Patents

Recoverable soil nail Download PDF

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Publication number
CN104532860B
CN104532860B CN201510017801.3A CN201510017801A CN104532860B CN 104532860 B CN104532860 B CN 104532860B CN 201510017801 A CN201510017801 A CN 201510017801A CN 104532860 B CN104532860 B CN 104532860B
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rod
anchor head
intermediate plate
spring
head base
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CN104532860A (en
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姚炳祥
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姚炳祥
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads

Abstract

The invention discloses a kind of recoverable soil nail, including soil nailing head, the body of rod, plastic bushing.Soil nailing head is made up of shell and loading plate, inner space is divided into cavity one and cavity two by the pretension pressing plate arranged in the two space surrounded, anchor head base, intermediate plate it is provided with in anchor head cavity two, anchor head base be connected below spring one, loading plate is provided with spring accumulator tank, being provided with stopper slot on package header, the lower end of anchor head base is provided with retention device.Present configuration is reasonable in design, by the intermediate plate arranged and anchor head base, the clamping to the body of rod in the course of the work of soil nailing head can be realized, and after soil nailing completes a protective function, the body of rod from rock, the soil body by pull out, thus completing the recovery of the body of rod, can reduce the pollution on periphery underground environment and impact, the soil nailing of this kind of structure, removal process is convenient and swift.

Description

Recoverable soil nail
Technical field
The invention belongs to technical field of civil engineering, be specifically related to a kind of recoverable soil nail.
Background technology
Plate brad supporting is a kind of new gear soil technology for building foundation pit and stability of slope, due to this process economics, reliable and construct quick, easy, is widely used at present.Plate brad supporting takes full advantage of the intensity of foundation soil itself, excavates soil body limit by limit and arranges the method for soil nailing and reach the purpose of supporting.In-situ test character is different from anchor pole, and anchor pole is typically provided with free segment and anchoring section, and the anchoring section stablized in the soil body by far-end provides bigger withdrawal resistance.And soil nailing is relative to anchor pole, and generally length and suffered pulling force are not typically small, Normal practice is to adopt total length grouting in hole, and centre arranges a reinforcing bar, and injecting cement paste and reinforcing bar are bonded to a cylindric entirety to bear tension load, now, injecting cement paste and the equal tension of reinforcing bar.When side slope is excavated downwards, the soil body deforms, and makes soil nailing bear withdrawal resistance, thus the reinforcing side slope soil body.Soil nailing has been widely used at present in the pattern foundation pit supporting structure and side slope consolidation projects of architectural engineering, but, in work progress, substantial amounts of soil nailing is set in the soil body, owing to reinforcing bar and injecting cement paste bond integral, reinforcing bar therein cannot be pulled out, being become permanent barrier in soil by Preserving time, to day, the foundation construction of rear perimeter edge engineering leaves bigger hidden danger.So, how after soil nailing completes its use function, the soil nailing body of rod is pulled out seem more and more important in time, sometimes also become the critical problem that can use soil nailing.
China Patent Publication No. CN202108052U discloses a kind of soil nailing that can complete after use in building foundation pit supporting engineering and reclaim.It is in rock, the soil body after pore-forming, in the cement injection body in hole, utilizes anchorage node that steel strand wires (or reinforcing bar) anchor is tight, thus completing the function of carrying.It is provided with safety in anchorage node, between steel strand wires (or reinforcing bar) and injecting cement paste, is provided with separation sleeve, after a protective function completes, safety can be opened, make steel strand wires (or reinforcing bar) and ground tackle separate, steel strand wires (or reinforcing bar) are pulled out the soil body, complete to reclaim.One soil nailing can arrange multiple anchorage node, and the anchorage node being positioned at diverse location can adjust deformation and the stressing conditions of steel strand wires (or reinforcing bar) by its internal brute spring, plays anchorage effect by endpoint node successively to intermediate node.This technical pattern is more complicated, makes in-situ test, power transmission be not as clear and definite owing to mutually being limited by multiple anchorage nodes, it is impossible to soil nailing cement slurry Shi Hanzhang, and the body of rod needs to break through the intermediate plate of multiple node when reclaiming, and reclaims and has bigger difficulty.
Disclosure of the invention CN101608450A discloses a kind of removable soil nailing, but it merely illustrates some ingredients of soil nail wall, and soil nailing does not have concrete recyclable structure, simply broadly illustrates it is the soil nailing that can pull out, and practical value is little.
Summary of the invention
For problems of the prior art, present invention aim at providing a kind of convenient soil nailing reclaimed, take techniques below scheme for this.
Described recoverable soil nail, it is arranged on the plastic bushing on the body of rod including soil nailing head, the body of rod, socket, it is characterized in that described soil nailing head includes shell, shell is fixedly installed on loading plate, being provided with in described shell along outer casing inner wall slidably anchor head base, intermediate plate, spring one, stopping device, spring one is equipped with between anchor head base and loading plate, and enclosure is divided into cavity one and cavity two, the described body of rod, through loading plate and spring one, is locked on anchor head base by intermediate plate.
By above technical scheme, the present invention first uses the lower inclined hole mechanically or manually setting a given diameter in the soil body in use on the work surface of excavation slight slope, is sent into by soil nailing in hole in place.Grouting Pipe is stretched at the bottom of hole, adopt and return sizing process at the bottom of hole and cement mortar is filled return slurry to aperture.Then termination carrier pipe being enclosed within outside the body of rod and plastic bushing, then insert in the injecting cement paste of aperture, outer end reserves certain length, in order to being welded and fixed with the reinforcement on the soil nail wall surface layer of outside.After injecting cement paste reaches certain intensity, begin at the termination carrier pipe outer end stretch-draw body of rod, be locked in the carrier pipe of termination with single hole anchor device after reaching the stretching force of requirement.Now whole soil nailing becomes one and is applied with prestressed compression member, it is possible to bear tension load.
In the process of the stretch-draw body of rod, anchor head base starts to move to loading plate, and spring one is recompressed slightly, and last spring one is pressed in spring accumulator tank, due to the relative displacement of anchor head base, produces the space of cavity two between its end face and pretension pressing plate.Now, anchor head base and loading plate close contact, body of rod pulling force is delivered on injecting cement paste by anchor head base and loading plate, bottom injecting cement paste, is subject to an outside extrusion stress, partner action of compressive stress in opposite direction on injecting cement paste with the pressure in the carrier pipe of termination, outside.When soil nailing goes out of use after the protective function completing soil nailing, soil nailing recovery operation now can be carried out.First by the stretching force removal on the body of rod during recovery, owing to not having pulling force effect, intermediate plate has the trend unclamped, it is possible to returning back in the space of cavity two, the body of rod is released, it is possible to extracted out by the body of rod from the outside.
Described recoverable soil nail, it is characterised in that shell is made up of casing cover set and package header, described package header is arranged with casing cover set grafting, and described loading plate is provided with spring accumulator tank.
By above technical scheme, the soil nailing shell of the present invention is divided into casing cover set and package header two parts to be mutually inserted.Package header is fixed on loading plate, and pretension pressing plate is fixed in casing cover set.Owing to casing cover set and package header two parts are for being mutually inserted, the pretension pressing plate in casing cover set can move up and down, it is ensured that pretension pressing plate can hold out against intermediate plate top and not get loose.After the body of rod is by stretch-draw, spring one is recompressed slightly, and enters in spring accumulator tank, and anchor head base is in close contact with loading plate.
Described recoverable soil nail, it is characterised in that intermediate plate is round table-like, for there being at least two pieces of halfbodies in gap to be put together, centre sets through hole, inside sets zigzag and sets one's teeth on edge stricture of vagina.
Described recoverable soil nail, it is characterized in that the socket of the tail end of intermediate plate is provided with spring two, its tail end face is pressed on anchor head base by pretension pressing plate, and described pretension pressing plate is fixed by pretension pressing plate positioning strip, and the welding of pretension pressing plate positioning strip is arranged on the inwall of casing cover set.
Arranged by above structure, owing to the body of rod is connected with soil nailing head by intermediate plate, require that intermediate plate can clamp the body of rod tightly in loading process, so, intermediate plate is designed to round table-like has two pieces of gap, three pieces or four pieces of halfbodies are put together, the body of rod is from middle traverse, and intermediate throughholes is provided with zigzag and sets one's teeth on edge stricture of vagina.In body of rod tension process, along with the increase of pulling force, owing to intermediate plate is tapered, the chucking power of the body of rod is strengthened further.Owing to clip-tough is higher, zigzag is set one's teeth on edge in the stricture of vagina embedding body of rod, firmly clamps the body of rod, to ensure not get loose in the course of the work.
In soil nailing, transport installation process, owing to not having pulling force on the body of rod, intermediate plate tapering is relatively big again, is easier to get loose from ground tackle base.Soil nailing head applies a pretightning force first in factory's assembly process intermediate plate and the body of rod, makes intermediate plate inner tooth thread nip in the body of rod, then can hold out against intermediate plate top by casing cover set and pretension pressing plate, is pressed in package header by ground tackle base and fixes with package header outer wall.Now the spring one in package header is partially compressed, and the resilience force of generation can hold out against intermediate plate and not get loose, to ensure soil nailing globality in transport, installation process.When soil nailing installation in position and after reaching curing requirements, can at outer end tension rod body, in the process of stretch-draw, spring one is recompressed slightly, the body of rod maintains certain pulling force all the time, the body of rod and intermediate plate is made not to get loose, until anchor head base and loading plate close contact, it is locked in termination after reaching predetermined stretching force and is in the charge of.When needs reclaim, the pulling force on the removal body of rod, intermediate plate has the trend unclamped.In order to reach further to unclamp effect, intermediate plate top is additionally provided with spring two, it is possible to utilize the elastic force of spring two to unclamp intermediate plate further after the body of rod unloads.
Described recoverable soil nail, it is characterised in that round pin, spring three that described stopping device includes being arranged on anchor head base and be arranged on the stopper slot on package header inwall.
Being arranged by this structure, when soil nailing body of rod stretch-draw, anchor head base is pulled to and is in close contact with loading plate, and spring one is pressed in spring accumulator tank, and cavity two space reaches maximum.When needs reclaim, the load on the body of rod is laid down, and anchor head base has the requirement of rollback, and now spring round pin and stopper slot limit the further rollback of anchor head base, to ensure the space of cavity two, makes intermediate plate possess the space come off.
Described recoverable soil nail, it is characterised in that the described body of rod is provided with termination carrier pipe away from one end of soil nailing head, and one end of described termination carrier pipe is fixedly installed termination plectane.
By technique scheme, in soil nailing installation process, when cement mortar is filled to aperture, termination carrier pipe being enclosed within outside plastic bushing and the body of rod, one end is stretched in hole in injecting cement paste, and certain length is reserved in outside.Termination carrier pipe stretches into the one end in hole and is fixed with termination plectane, it is possible to increasing the contact area with injecting cement paste further, last termination carrier pipe and injecting cement paste are linked to be an entirety.Injecting cement paste starts the stretch-draw body of rod after reaching some strength, and owing to termination carrier pipe and injecting cement paste connect integral, and end has termination plectane can bear bigger compressive stress, and now, injecting cement paste inside and outside two ends are squeezed simultaneously becomes a compression member.Termination carrier pipe is frequently with short section of steel pipe, and it is drawn materials conveniently, is reserved in outer part and can conveniently be connected with soil nail wall surface layer stiffener fixing.
Described recoverable soil nail, it is characterised in that uniform on described plastic bushing be provided with plastic centering bracket.
Described recoverable soil nail, it is characterised in that the contact surface of described intermediate plate and anchor head base is provided with antirust coat.
By above technical scheme, it is ensured that the body of rod is in the center of injecting cement paste all the time, be conducive to injecting cement paste axial compression.Simultaneously as injecting cement paste is embedded in the soil body, there are soil body parcel and constraint in outside, limits the lateral displacement of injecting cement paste, so, injecting cement paste two ends can be born bigger pressure and do not destroyed.
In order to be further ensured that intermediate plate can be easier to get loose when soil nailing reclaims, and all takes rust preventing to the contact surface of intermediate plate and anchor head base, in case both corrosions are together.Realize further getting loose furthermore it is also possible to pass through to beat the body of rod when reclaiming.
Present configuration is reasonable in design, simple, by the intermediate plate arranged and anchor head base, intermediate plate clamping to the body of rod in the course of the work can be realized, and after soil nailing completes protective function, intermediate plate energy rollback unclamps, the body of rod can pull be out from rock, the soil body, thus completing the recovery of the body of rod, reducing the pollution on periphery underground environment and impact, the soil nailing of this kind of structure, removal process is convenient and swift.
Accompanying drawing explanation
Fig. 1 is present invention structural representation in Bracing Process;
Fig. 2 is soil nailing head shell mechanism schematic diagram;
Fig. 3 is soil nailing head internal sectional structure schematic diagram;
Fig. 4 is the sectional structure schematic diagram after Fig. 3 applies pulling force;
Fig. 5 is termination carrier pipe structural representation;
Fig. 6 installs the structural representation to medium-height trestle on plastic bushing;
Fig. 7 is the sectional view that anchor head base is connected with intermediate plate;
Fig. 8 is intermediate plate sectional structure schematic diagram;
Fig. 9 is pretension pressure plate structure schematic diagram;
Figure 10 is round pin structural representation;
Figure 11 is the A-A section of Figure 10;
In figure: 1-soil nailing head, the 2-body of rod, 3-plastic bushing, 4-shell, 5-loading plate, 6-anchor head base, 7-intermediate plate, 8-spring one, 9-cavity one, 10-cavity two, 11-casing cover set, 12-package header, 13-spring accumulator tank, 14-spring two, 15-round pin, 16-spring three, 17-stopper slot, 18-termination carrier pipe, 19-termination plectane, 20-is to medium-height trestle, 21-mouthpiece, 22-pretension pressing plate, 23-injecting cement paste, 24-single hole anchor device, 25-anchor plate, 26-pretension pressing plate positioning strip.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention is described in further detail, and provides detailed description of the invention.
As shown in figs. 1-11, the present invention includes soil nailing head 1, the body of rod 2, is socketed the plastic bushing 3 being arranged on outside the body of rod, uniform on plastic bushing it is provided with plastic centering bracket 20, the body of rod is steel strand wires or reinforcing bar, the body of rod is provided with termination carrier pipe 18 away from one end of soil nailing head, and one end of termination carrier pipe is fixedly installed termination plectane 19.Soil nailing head 1 includes the shell 4 being made up of casing cover set 11 and package header 12, package header is arranged with casing cover set grafting, package header 12 is fixedly installed on loading plate 5, and loading plate is provided with spring accumulator tank 13, loading plate is additionally provided with mouthpiece 21 and is connected with plastic bushing 3.Being provided with in shell 4 can along the anchor head base 6 of the unidirectional slip of outer casing inner wall, round table-like intermediate plate 7, spring 1, stopping device, spring 1 is equipped with between anchor head base 6 and loading plate 5, enclosure is divided into cavity 1 and cavity 2 10, the body of rod 2, through loading plate 5 and spring 1, is locked on anchor head base 6 by intermediate plate 7.Round pin 15, spring 3 16 that stopping device includes being arranged on anchor head base and be arranged on the stopper slot 17 on package header 12 inwall, this stopping device is for stoping the rollback of anchor head base 6.
The concrete structure of round table-like intermediate plate 7 is that at least two pieces of halfbodies having gap are put together, and centre sets through hole, inside sets zigzag and sets one's teeth on edge stricture of vagina.The tail end socket of intermediate plate 7 is provided with spring 2 14, and intermediate plate end face is pushed down by pretension pressing plate 22 and held out against, and overlaps in 11 at casing cover and is provided with the pretension pressing plate positioning strip 26 for fixing pretension pressing plate, and the welding of this pretension pressing plate positioning strip 26 is arranged on the inwall of casing cover set.The contact surface of intermediate plate 7 and anchor head base 6 is provided with antirust coat.
Package header 12, when assembly, is first fixed on loading plate 5 by the present invention, is put into by spring 1 in package header 12, then, is pressed in package header 12 by anchor head base 6.The soil nailing body of rod 2, through loading plate 5, spring 1 and anchor head base 6, is clamped on anchor head base 6 with intermediate plate 7.For preventing intermediate plate from unclamping, a pretightning force can be applied first to intermediate plate and the body of rod, intermediate plate inner tooth thread is made to nip in the body of rod, then overlap 11 with pretension pressing plate 22 and casing cover to be fixed by intermediate plate 7, owing to now spring 1 receives Partial shrinkage, can firmly hold out against intermediate plate 7 and pretension pressing plate 22, it is prevented that it unclamps in transport and installation process.The body of rod 2 extends to outer end through mouthpiece 21 and plastic bushing 3.
After excavation slope digs out work surface, adopting roof-bolter or Luoyang Spade first to set the lower inclined hole of certain pore size in the soil body, hole depth is slightly longer than soil-nail parameter.Then, the soil nailing head 1 made, the body of rod 2, plastic bushing 3 are inserted in inclined hole together with Grouting Pipe.The cement mortar of certain ratio of mud or cement mortar are poured into inclined hole to aperture grout by returning the technique of slurry at the bottom of hole.Owing to being provided with medium-height trestle 20 at a certain distance on the outer plastic bushing 3 of the body of rod, the body of rod can being made placed in the middle in hole, again owing to the body of rod 2 is wrapped up by plastic bushing 3, the body of rod does not contact with cement mortar.After filling cement mortar in hole, termination carrier pipe 18 and the termination plectane 19 that is secured to are enclosed within outside the soil nailing body of rod 2 and plastic bushing 3 together, stretching in the injecting cement paste of aperture also placed in the middle again, outer end reserves certain length and can be welded and fixed with soil nail wall surface layer reinforcement afterwards.When strength of cement grout reaches about 15Mpa, start with jack at the short section of carrier pipe 18 outer end stretch-draw body of rod 2.Now, the body of rod 2 is clamped on anchor head base 6 by intermediate plate 7, and the effect lower spring 1 at stretching force is recompressed slightly, anchor head base 6 moves to loading plate 5, due to the elastic force of spring 1, the body of rod 2 remains certain pulling force, it is possible to prevent intermediate plate 7 from getting loose in moving process.After being pulled to certain displacement, round pin 15 snaps in stopper slot 17 under the effect of spring 3 16, and now, anchor head base 6 and loading plate 5 are fully contacted, and anchor head base 6 and intermediate plate 7 end face separate with pretension pressing plate 22, produce the space of anchor head cavity 2 10.Spring 1 is pressed in spring accumulator tank 13, and the stretching force of the body of rod 2 is delivered on cement slurry by loading plate 5.Meanwhile, termination, outside carrier pipe is ecto-entad top pressure injection slurry 23 also, and soil nailing injecting cement paste 23 is subject to two ends extruding and becomes a compression member.After requiring stretching force, with single hole anchor device 24 and anchor plate 25, the body of rod 2 is locked at termination carrier pipe 18 outer end.Due to the effect of prestressing force, the two ends of soil nailing injecting cement paste 23 are subject to bigger extruding, and injecting cement paste 23 becomes one and is applied with prestressed compression member, and after slope soil is subjected to displacement, soil nailing can bear tension load.Add prestressed compression member owing to soil nailing injecting cement paste 23 is one, enough pulling force can have been born and do not break, reach the purpose of supporting.
When soil nailing completes after its Support Function goes out of use, it is possible to carry out recovery operation.First in outside by the prestressing force removal on the body of rod, now, anchor head base 6 rollback under the effect of spring 1, round pin 15 is stuck in stopper slot 17, limits its further rollback, to ensure the space of anchor head cavity 2 10.Owing to the body of rod 2 does not contact with outside injecting cement paste 23, it does not have cohesive force;Again owing to the tapering of intermediate plate 7 is relatively big, exceed its angle of lock.After the body of rod 2 prestressing force releases, intermediate plate 7 has the trend unclamped, now, the resilience force of spring 2 14 is also beneficial to unclamping of intermediate plate 7, again through beaing the body of rod 2 in outside, can make intermediate plate 7 rollback to anchor head cavity 2 10 simultaneously, intermediate plate is separately, having unclamped the clamping to the body of rod 2, the body of rod 2 can be drawn out of from plastic bushing 3, completes the recovery of soil nailing.
The present invention breaches tradition soil nailing and adopts injecting cement paste and the body of rod to be mutually bonded to a cylindric body of cement to bear tension load.By adopting soil nailing head, the body of rod, plastic bushing and termination, outside carrier pipe achieve and soil nailing injecting cement paste are applied compressive pre-stress, have given full play to cement slurry compressive resistance big, the characteristic that stretching resistance is little, soil nailing injecting cement paste is made to become the compression member of a Shi Hanzhang, thus realizing bearing tension load.Owing to being applied with prestressing force, it is possible to reduce fracture width during soil nailing tension further, better control over the deformation of side slope.And when soil nailing is discarded, it is possible to reclaim the body of rod therein by the prestressing force on the removal body of rod, decrease the pollution to periphery underground environment.

Claims (5)

  1. null1. recoverable soil nail,Including soil nailing head (1)、The body of rod (2)、Socket is arranged on the body of rod (2) plastic bushing (3) outward,It is characterized in that described soil nailing head (1) includes shell (4),Shell (4) is fixedly installed on loading plate (5),It is provided with in described shell along outer casing inner wall slidably anchor head base (6)、Intermediate plate (7)、Spring one (8)、Stopping device,Spring one (8) is equipped with between anchor head base (6) and loading plate (5),Enclosure is divided into cavity one (9) and cavity two (10),The described body of rod (2) traverse loading plate (5) and spring one (8),It is locked on anchor head base (6) by intermediate plate (7),Described shell (4) is made up of casing cover set (11) and package header (12),Described package header is arranged with casing cover set grafting,Described loading plate is provided with spring accumulator tank (13),Described intermediate plate (7) is in round table-like,For there being at least two pieces of halfbodies in gap to be put together,Centre sets through hole,Inside set zigzag to set one's teeth on edge stricture of vagina,The tapering of intermediate plate is more than its angle of lock,The described body of rod (2) is provided with termination carrier pipe (18) away from one end of soil nailing head (1),One end of described termination carrier pipe (18) is fixedly installed termination plectane (19).
  2. 2. recoverable soil nail according to claim 1, it is characterized in that the socket of the tail end of intermediate plate (7) is provided with spring two (14), its tail end face is pressed on anchor head base (6) by pretension pressing plate (22), described pretension pressing plate (22) is fixed by pretension pressing plate positioning strip (26), and pretension pressing plate positioning strip (26) welding is arranged on the inwall of casing cover set (11).
  3. 3. recoverable soil nail according to claim 1, it is characterised in that round pin (15) that described stopping device includes being arranged on anchor head base (6), spring three (16) and the stopper slot (17) being arranged on package header (12) inwall.
  4. 4. recoverable soil nail according to claim 1, it is characterised in that described plastic bushing (3) is upper uniform is provided with plastic centering bracket (20).
  5. 5. recoverable soil nail according to claim 1, it is characterised in that the contact surface of described intermediate plate (7) and anchor head base (6) is provided with antirust coat.
CN201510017801.3A 2015-01-14 2015-01-14 Recoverable soil nail Active CN104532860B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN104532860B true CN104532860B (en) 2016-07-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107304565A (en) * 2016-04-19 2017-10-31 郑州大学 A kind of recoverable soil nail bar construction
CN106013087B (en) * 2016-07-19 2019-05-21 周兆弟 The steel strand wires locking mechanism and application method of prefabricated pile
CN111691416B (en) * 2020-06-17 2021-07-06 深圳市勘察测绘院(集团)有限公司 Using method of manual push-pull semi-recovery anchor rod

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2311385C3 (en) * 1973-03-08 1979-03-29 Mituo Kawasaki Kanagawa Shibata (Japan) Anchoring device and method for inserting the device into the ground
KR100488118B1 (en) * 2002-07-05 2005-05-09 최영근 Compressive and Extensive Fixture of Earth Anchor
KR200340940Y1 (en) * 2003-10-22 2004-02-11 김범연 Fixing agent for ground anchor
CN202108052U (en) * 2010-11-23 2012-01-11 王立明 Imbedding recoverable soil nail
CN103321220B (en) * 2012-03-19 2015-09-02 深圳市工勘岩土工程有限公司 Prestress anchorage cable method for stretching and device thereof
CN204475352U (en) * 2015-01-14 2015-07-15 姚炳祥 Recoverable soil nail

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