CN207212382U - A kind of self-vibration jet grouted anchor bar integrated construction equipment - Google Patents
A kind of self-vibration jet grouted anchor bar integrated construction equipment Download PDFInfo
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- CN207212382U CN207212382U CN201721258491.5U CN201721258491U CN207212382U CN 207212382 U CN207212382 U CN 207212382U CN 201721258491 U CN201721258491 U CN 201721258491U CN 207212382 U CN207212382 U CN 207212382U
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- self
- anchor bar
- grouted anchor
- pressure
- vibration jet
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Abstract
The utility model discloses a kind of self-vibration jet grouted anchor bar integrated construction equipment, is made up of self-vibration jet grouted anchor bar, high-pressure rotary mortar mixer, grouting device, fluid pressure drive device.Described self-vibration jet grouted anchor bar, is the hollow lever with spiral shell rib stirring sheet, and anchor pole front end sets self-excited oscillation generator, self-excited oscillation generator connection bore bit.Described high-pressure rotary mortar mixer top is provided with charging aperture, bottom is provided with the swing leg that can be freely lifted and rotate, front portion is provided with jet nozzle, inner chamber is provided with rotary shaft, rotary shaft front end sets connection plug, in mating connection with self-vibration jet grouted anchor bar connected slot, rear end is provided with bearing, and both ends are provided with high pressure sealing box.Grouting device adjusts grouting amount and grouting pressure at any time, and fluid pressure drive device provides rotary power.This item utility model will be widely used in the support reinforcement engineering of the engineering fields such as mine, traffic, water conservancy, have a extensive future, remarkable in economical benefits.
Description
Technical field
It the utility model is related to mine, traffic, water conservancy, the anchor pole of engineering field.
Background technology
In the fields such as mine engineering, Geotechnical Engineering, Tunnel Engineering, to prevent stratum and surrouding rock deformation or unstability from jeopardizing
Engineering safety is, it is necessary to carry out support reinforcement to stratum country rock, and suspension roof support reinforcement technique is a kind of branch being most widely used
Shield technology.Suspension roof support can fully play the stabilizing power of Rock And Soil itself, but protolith is disturbed small, speed of application is fast,
Securely and reliably, economical and effective, thus in mine support, tunnel support, slope retaining, Large Underground chamber support, and it is all kinds of
It is widely used in building anti-floating, antidumping engineering.Wherein, the support reinforcement effect of grouted anchor bar is compared to common anchor
Bar is more effective.Grouted anchor bar can realize that pressure total length bonds, and both improve anchoring strength, again slurry can be made effectively deeply to enclose
Lithofraction gap, breaking surrounding rock bulk strength, more effective deformation controlling for rock surrounding gateways are improved, and anchor pole encapsulation is good, is not easy by formation fluid
Corrosion.
At present, the grouted anchor bar applied in most of mine and Geotechnical Engineering is all using hydraulic pressure or pneumatic drilling machine as power
Source, after rotary drilling to position of stratum depth, then anchor pole is installed, finally carries out mortar depositing construction operation.Such grouted anchor bar for
Though improve surrouding rock stress environment and improve load-carrying capacity of surrounding rock with obvious effect, country rock body degree of crushing it is high,
Cranny development, country rock from the engineering such as the steady time is short, jewel hole bottom hole rock is hard or it is other in particular cases, have it is following not
Foot：(1) grouting pressure is low, can not effectively go deep into crack, and incompact fractured surrounding rock integral reinforcing effect is poor；(2) anchor pole drilling with
Slip casting is unable to Integral synchronous progress, after typically need to first drilling, extract drilling rod, installing anchor pole, then carries out slip casting operation, causes to apply
The work cycle is grown, and for extremely unstable country rock, easily misses optimal anchoring support opportunity, cause surrouding rock deformation unstability, even
Destroy；(3) in drilling process, the rotary drilling of power source is only relied on, bore bit is small to the impulsive force of bottom hole solid rock, rock drilling
, drilling speed low with efficiency of breaking rock is slow, jewel hole long construction period.Therefore, the practical application promotion effect of grouted anchor bar is not very
Ideal, show as its total length compactness of grouting is not high, and bearing capacity deficiency, working procedure is complicated, and drilling speed is slow, the cycle is grown etc..For
Overcome above mentioned problem, researcher proposes various new grouted anchor bar.
Such as：Chinese invention patent ZL201310096450.0 discloses a kind of perforation major part slip casting constant-resistance anchor pole, exploitation
A kind of anchor pole used of applicable mine particular surroundings, by blasting and perforating device in termination point of anchor rod (in fractured coal and rock) shape
Into blasting and perforating crack or hole, high-pressure slip-casting device is recycled in termination fractured coal and rock（Soft rock）Interior formation major part anchoring anchor
Bar, bottom hole efficiency of breaking rock can be improved to a certain extent, the features such as realizing high-pressure slip-casting, solving existing common bolt should in height
The problem of supporting intensity is low under the complex geological condition of power country rock, soft rock and fragmented rock body.But this kind of anchor pole is using explosion
Means, execution conditions and complex procedures, jewel hole and the construction of slip casting synchronous integrated can not be realized, midway needs more exchange device,
Optimal supporting time may be delayed.
Chinese utility model patent ZL201420048521.X discloses a kind of Self-propelling grouting anchoring-bolt, weak for tunnel
Country rock is constructed and Tunnel Landslide disposal, it can also be used to side slope protection.Grouted anchor bar main body is provided with central slip casting including hollow
The anchor bar body of passage, anchor bar body front end are provided with the cross bit with bit wing sword " 8 ", solve conventional anchor punching, plug
Anchor Agent and anchor pole complicated construction process is put, and can realize that anchor pole closely connects with rock mass total length by the slip casting of hollow bolt body
Touch, when avoiding collapse hole anchor pole be difficult to fill in, Anchor Agent leakiness the problems such as.But this kind of anchor pole can not realize jewel hole and note
Synchronous integrated construction is starched, and the cross bit efficiency of breaking rock of blade " 8 " also has much room for improvement.
Chinese utility model patent ZL201220074667.2 discloses a kind of mining high-voltage water from grouted anchor bar is bored, by anchor
Head, shaft and bearing three parts composition, anchor head are made up of high-pressure water outlet, high pressure water transport pipe and drill bit, and high pressure water transport pipe is placed in
In anchor bar body and drill bit internal, high-pressure water outlet is placed in the front end of drill bit, aids in breakdown rock using water under high pressure and improves drilling speed,
Supporting operating efficiency is improved, the anchor-hold being effectively improved after first anchor-hold and supporting.But this kind of anchor pole water under high pressure breakdown rock
Stone process and slip casting process are separate operations, i.e., first carry out drill bit drilling, and are aided with water under high pressure breakdown rock, then carry out slip casting
Construction operation, anchor pole drilling nor synchronous integrated is constructed, equally exist long construction period, complex procedures are asked with slip casting
Topic, and the drilling process adds water under high pressure broken rock this technical process, and working procedure may be made cumbersome.If cement can be used
Slurry directly substitutes water under high pressure, and realizes synchronous drilling and slip casting operation, it will greatly simplifies working procedure, shortens the time, improves
Drilling speed.
In summary, existing grouted anchor bar, generally existing anchor pole drilling are unable to synchronous integrated construction, construction week with slip casting
The problem of phase is long, complex procedures, and for catalase degree height, cranny development, country rock from the steady time is short, jewel hole bottom hole rock
The supporting effect of hard grade is not satisfactory, and a kind of self-vibration jet grouted anchor bar integrated construction equipment of the utility model can be solved preferably
Certainly above-mentioned supporting problem.
The content of the invention
The purpose of this utility model is to overcome the shortcomings of existing grouted anchor bar, there is provided a kind of self-vibration jet grouted anchor bar one
Change construction equipment, solve catalase degree height in underground engineering, cranny development, country rock from short support issues of steady time, with
And the problem of hard caused jewel hole efficiency of bottom hole rock is low, long construction period, complex procedures, permanent support can be both used as,
Gib is may be used as again.The application method of the equipment is provided simultaneously.
A kind of construction of self-vibration jet grouted anchor bar integrated construction equipment of the utility model is：By self-vibration jet slip casting anchor
Bar, high-pressure rotary mortar mixer, grouting device, fluid pressure drive device composition.
Described self-vibration jet grouted anchor bar, anchor pole front end set self-excited oscillation generator, and self-excited oscillation generator is connected with
Bore bit, can form axial vibration impact and efficient drilling rock drilling, the follower head of anchor rod body are provided with stop grouting plug, pallet, slip casting
Interface, nut and connected slot, anchor rod body are the hollow lever with spiral shell rib stirring sheet, and slurry can be sufficiently stirred after slip casting
Body, realize that uniform, total length bonds, there is the tack coat that slip casting is formed between anchor rod body and the wall of a borehole.
Described self-excited oscillation generator is made up of the rotation moving tooth of former and later two odd-shaped cross sections, and anchor rod body is in rotary drilling
Moving tooth rotary motion before being driven when entering, moving tooth rotates after preceding moving tooth is stirred in rotary course, and front and rear rotation moving tooth staggeredly moves
Movable property gives birth to axial impact, and rear moving tooth is connected with bore bit, and rotate a circle one circulation of impact, it is possible to achieve high-frequency percussion drilling hole bottom
Solid rock, it is higher than simple grinding rock-breaking efficiency, realize efficiently drilling broken rock.
Described bore bit is made up of wing, jet slurry injection nozzle, inserted, Sealing shield ring, and wing quantity can be according to rock
Hardness is arranged to 3 ~ 6 wings, and to bore straight type nozzle, nozzle quantity can require to set 3 ~ 6 jet slurry injection nozzle according to slip casting
Individual, inserted is impact resistant polycrystal diamond composite sheet, can rotary impact effect under efficiency crushing rock.
Described high-pressure rotary mortar mixer, its top are provided with charging aperture, and bottom, which is provided with, can be freely lifted and rotate
Swing leg, Integral synchronous drilling, slip casting can be implemented to the position of different angle, height, front portion is provided with 3 ~ 6 jets
Jet pipe, effect are the slurry inside high-pressure rotary mortar mixer is formed high-speed jet, and inner chamber is provided with rotary shaft, rotary shaft front end
Connection plug is set, and in mating connection with the connected slot of self-vibration jet grouted anchor bar, rear end is provided with bearing, and both ends are respectively provided with
There is high pressure sealing box, using high-pressure rotary car seal, pressure-resistant reachable more than 30MPa.
Described grouting device is made up of grouting pump, high-pressure slip-casting manifold, high pressure control valve, and effect is that adjustment is noted at any time
Slurry amount and grouting pressure needed for slurry, ensure that the pressure or flow of slurry supply during construction are sufficient, have good uniformity.
Described fluid pressure drive device is made up of hydraulic motor, hydraulic pressure manifold, hydraulic workstation, and effect is in order to more preferable
To a kind of self-vibration jet grouted anchor bar integrated construction equipment provide rotary power, driving high-pressure rotary mortar mixer rotary shaft with
And self-vibration jet grouted anchor bar body rotates.
A kind of construction method of self-vibration jet grouted anchor bar integrated construction equipment of the utility model is：Regulation rotation first
Supporting leg is in place, then high-pressure rotary mortar mixer is connected into hydraulic motor and hydraulic workstation, and with grouting pump high-pressure slip-casting pipe
Remittance connects with control valve, after self-vibration jet grouted anchor bar is in place, need to install nut, pallet, stop grouting plug in advance, then self-vibration is penetrated
Flow grouted anchor bar and pass through the connection plug of high-pressure rotary mortar mixer front end and the connected slot and high-pressure rotary of anchor rod body rear end
Mortar mixer connects, meanwhile, the jet nozzle outlet of high-pressure rotary mortar mixer and the slip casting interface of self-vibration jet grouted anchor bar are just
Docking, form slip casting flow channel；During construction, first start hydraulic workstation and hydraulic motor, the mortar mixer rotation of driving high-pressure rotary
Axis of rotation, self-vibration jet grouted anchor bar is driven to rotate, in body of rod rotation process, moving tooth rotates before triggering self-excited oscillation generator,
Preceding moving tooth stirs rear moving tooth rotation, and staggeredly mobile rotate a circle completes one-shot, and persistent loop impacts, percussion conduction
To bore bit, the impact grinding to drilling hole bed rock stone is completed, finally, starts grouting pump in good time, slurry flows into high-pressure rotary slurry
Device charging aperture, and front end jet nozzle is delivered to, first order high-speed jet is produced, slurry is noted by self-vibration jet grouted anchor bar again
Slurry interface enters anchor rod body, and is transported to the jet slurry injection nozzle of bore bit, and ejection forms second level high speed, water under high pressure mud is penetrated
Stream, can play a part of addi-tional crusher bottom hole rock in boring procedure, and high speed, high-pressure slurry can again stirred in spiral shell rib
Whole drilling is flowed through under the agitation of piece, is bonded with hole wall total length, and invades deep crush or crack rock, slip casting is synchronously completed and adds
Gu process, reach drilling construction and the purpose of mortar depositing construction synchronous integrated construction.
A kind of the advantages of self-vibration jet grouted anchor bar integrated construction equipment of the utility model is：
1st, using self-vibration jet grouted anchor bar, vibroflotation effect itself is produced during rotary drilling, it is possible to increase pricker
The rock drilling of head or efficiency of breaking rock, improve penetration rate, save the engineering time, high pressure, high-speed jet slurry can also be deeply broken
Or the deep of crack country rock body, for prior art, grouting and reinforcing scope is wide, depth is big and effect is good, while can also
Armature boring, the construction of slip casting synchronous integrated are realized, technological process is simple, significantly shortens the construction period.
2nd, it is good to the high pressure sealing performance of this multiphase fluid-mixing medium of cement mortar using high-pressure rotary mortar mixer, can
It is good up to more than 30MPa, wall rock grouting consolidation effect to improve grouting pressure；Swing leg can be freely lifted and rotate, energy
Realize and Integral synchronous drilling, mortar depositing construction are implemented to the position of different angle, height, convenient disassembly, structure are reliable, are applied to
Job site complex work condition.
3rd, the equipment construction working procedure systemses, drilling efficiency is high, and grouting quality and effect are good, and construction technology is simple, side
Just, short time limit, cost performance is superior, and physical and mechanical property is stable.
Brief description of the drawings
Fig. 1 is overall structure connection diagram of the present utility model.
Fig. 2 is the structural representation of self-vibration jet grouted anchor bar body in Fig. 1.
Fig. 3 is Fig. 1 mesohighs rotation mortar mixer structural representation.
Fig. 4 is the structural representation of bore bit in Fig. 2.
Fig. 5 is the A-A profiles of bore bit in Fig. 2.
Fig. 6 is self-vibration jet grouted anchor bar use state diagram in the utility model.
In figure：1-self-vibration jet grouted anchor bar；2-high-pressure rotary mortar mixer；3-grouting pump；4-high-pressure slip-casting pipe
Converge；5-high pressure control valve；6-hydraulic motor；7-hydraulic pressure manifold；8-hydraulic workstation；9-tack coat；10-drilling；
101-bore bit；102-self-excited oscillation generator；103-anchor rod body；104-spiral shell rib stirring sheet；105-stop grouting plug；106-support
Disk；107-nut；108-slip casting interface；109-connected slot；201-rotary shaft；202-jet nozzle；203-connection
Plug；204-bearing；205-flat key；206-high pressure sealing box；207-charging aperture；208-swing leg；1011-knife
The wing；1012-jet slurry injection nozzle；1013-inserted；1014-Sealing shield ring.
Embodiment
The utility model provides a kind of self-vibration jet grouted anchor bar integrated construction equipment, for make the purpose of the present invention,
Technical scheme and effect are clearer, clear and definite, and the embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
As shown in Fig. 1~Fig. 6, a kind of self-vibration jet grouted anchor bar integrated construction equipment of the utility model, including self-vibration
Jet grouted anchor bar 1, high-pressure rotary mortar mixer 2, grouting device, fluid pressure drive device.
Described self-vibration jet grouted anchor bar 1, anchor pole front end set self-excited oscillation generator 102, self-excited oscillation generator 102
Bore bit 101 is connected, forms axial vibration impact so as to which efficient drilling rock drilling, the follower head of anchor rod body 103 are provided with stop grouting plug
105th, pallet 106, slip casting interface 108, nut 107 and connected slot 109, anchor rod body 103 are with spiral shell rib stirring sheet 104
Hollow lever, can be sufficiently stirred slurry after slip casting, realize uniformly, total length bond, anchor rod body 103 and 10 hole walls of drilling it
Between have slip casting formed tack coat 9.
Described self-excited oscillation generator 102 is made up of the rotation moving tooth of former and later two odd-shaped cross sections, and anchor rod body 103 exists
Moving tooth rotary motion before being driven during rotary drilling, moving tooth rotates after preceding moving tooth is stirred in rotary course, front and rear rotation moving tooth
Staggeredly mobile to produce axial impact, rear moving tooth is connected with bore bit 101, and rotate a circle one circulation of impact, it is possible to achieve high frequency rushes
10 bottom hole solid rocks of drilling are hit, it is higher than simple grinding rock-breaking efficiency, realize efficiently drilling broken rock.
Described bore bit 101 includes wing 1011, jet slurry injection nozzle 1012, inserted by 1013, Sealing shield ring 1014, wing
1011 quantity can be arranged to 3 ~ 6 wings according to hardness degree of rock, and jet slurry injection nozzle 1012 is to bore straight type nozzle, nozzle quantity
It can be required to set 3 ~ 6 according to slip casting, inserted 1013 be impact resistant polycrystal diamond composite sheet, can be under rotary impact effect
Efficiency crushing rock.
Described high-pressure rotary mortar mixer 2, its top are provided with charging aperture 207, bottom be provided with can be freely lifted and
The swing leg 208 of rotation, can implement Integral synchronous drilling, slip casting to the position of different angle, height, and front portion is provided with 3 ~
6 jet nozzles 202, effect are the slurry inside high-pressure rotary mortar mixer 2 is formed high-speed jet, and inner chamber is provided with rotary shaft
201, the front end of rotary shaft 201 sets connection plug 203, in mating connection with the connected slot 109 of self-vibration jet grouted anchor bar 1,
Rear end is provided with bearing 204, and both ends are provided with high pressure sealing box 206, pressure-resistant reachable using high-pressure rotary car seal
More than 30MPa.
Described grouting device is made up of grouting pump 3, high-pressure slip-casting manifold 4, high pressure control valve 5, and effect is to adjust at any time
Slurry amount and grouting pressure needed for whole slip casting, ensure that the pressure or flow of slurry supply during construction are sufficient, have good uniformity.
Described fluid pressure drive device is made up of hydraulic motor 6, hydraulic pressure manifold 7, hydraulic workstation 8, effect be in order to
Preferably rotary power, the rotary shaft 201 and self-vibration jet grouted anchor bar of driving high-pressure rotary mortar mixer 2 are provided to the present invention
The body of rod 103 rotates.
A kind of self-vibration jet grouted anchor bar integrated construction equipment of the utility model, specifically includes the following course of work：
1st, it is in place that swing leg 208 is adjusted first, then high-pressure rotary mortar mixer 2 is connected to hydraulic motor 6 and hydraulic pressure work
Make station 8, and be connected with grouting pump 3 with high-pressure slip-casting manifold 4 and control valve 5, after self-vibration jet grouted anchor bar 1 is in place, need to be shifted to an earlier date
Install nut 107, pallet 106, stop grouting plug 105, then by self-vibration jet grouted anchor bar 1 by high-pressure rotary mortar mixer 2 before
The connection plug 203 at end and the connected slot 109 of the rear end of anchor rod body 103 are connected with high-pressure rotary mortar mixer 2, meanwhile, high pressure
The outlet of jet nozzle 202 of rotation mortar mixer 2 is just docked with the slip casting interface 108 of self-vibration jet grouted anchor bar 1, forms slip casting
Flow channel；
When the 2nd, constructing, first start hydraulic workstation 8 and hydraulic motor 6, the rotary shaft 201 of driving high-pressure rotary mortar mixer 2
Rotate, drive the anchor rod body 103 of self-vibration jet grouted anchor bar 1 to rotate, in the rotation process of anchor rod body 103, trigger self-excited oscillation
The preceding moving tooth of generator 102 rotates, and preceding moving tooth stirs rear moving tooth rotation, rotates a circle and completes one-shot, and persistent loop rushes
Hit, percussion conducts the impact grinding for bore bit 101, completing the bottom hole rock to drilling 10；
3rd, grouting pump 3 is started in good time, slurry flows into the charging aperture 207 of high-pressure rotary mortar mixer 2, and is delivered to front end jet
Jet pipe 202, produces first order high-speed jet, and slurry enters anchor pole bar by the slip casting interface 108 of self-vibration jet grouted anchor bar 1 again
Body 103, and the jet slurry injection nozzle 1012 of bore bit 101 is transported to, ejection forms second level high speed, water under high pressure slurry jet, both
Addi-tional crusher 10 bottom hole rocks of drilling can be played a part of in boring procedure, high speed, high-pressure slurry can again stirred in spiral shell rib
Mix and whole drilling 10 is flowed through under the agitation of piece 104, bonded with hole wall total length, and invade deep crush or crack rock, it is synchronous complete
Into grouting and reinforcing process, reach efficient drilling and the purpose of slip casting synchronous integrated construction.
Claims (1)
- A kind of 1. self-vibration jet grouted anchor bar integrated construction equipment, it is characterised in that：Revolved by self-vibration jet grouted anchor bar, high pressure Turn mortar mixer, grouting device, fluid pressure drive device to form；Described self-vibration jet grouted anchor bar is carried in spiral shell rib stirring sheet The empty body of rod, its front end sets the self-excited oscillation generator being made up of former and later two rotation moving teeth, and connects bore bit, and follower head is set There are stop grouting plug, pallet, slip casting interface, nut and connected slot；Described high-pressure rotary mortar mixer, its top are provided with charging Mouthful, bottom is provided with the swing leg that can be freely lifted and rotate, and front portion is provided with jet nozzle, and inner chamber is provided with rotation Axle, rotary shaft front end set connection plug, and in mating connection with the connected slot of self-vibration jet grouted anchor bar, rear end is provided with axle Hold, both ends are provided with high pressure sealing box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721258491.5U CN207212382U (en) | 2017-09-28 | 2017-09-28 | A kind of self-vibration jet grouted anchor bar integrated construction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721258491.5U CN207212382U (en) | 2017-09-28 | 2017-09-28 | A kind of self-vibration jet grouted anchor bar integrated construction equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207212382U true CN207212382U (en) | 2018-04-10 |
Family
ID=61819640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721258491.5U Expired - Fee Related CN207212382U (en) | 2017-09-28 | 2017-09-28 | A kind of self-vibration jet grouted anchor bar integrated construction equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN207212382U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476814A (en) * | 2017-09-28 | 2017-12-15 | 滨州学院 | A kind of self-vibration jet grouted anchor bar integrated construction device and method |
| CN109026099A (en) * | 2018-07-05 | 2018-12-18 | 安徽理工大学 | A kind of soft-rock tunnel full length fastening supporting construction and its construction method |
| CN113737789A (en) * | 2021-11-03 | 2021-12-03 | 成都理工大学 | Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer |
-
2017
- 2017-09-28 CN CN201721258491.5U patent/CN207212382U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476814A (en) * | 2017-09-28 | 2017-12-15 | 滨州学院 | A kind of self-vibration jet grouted anchor bar integrated construction device and method |
| CN107476814B (en) * | 2017-09-28 | 2023-08-25 | 滨州学院 | Integrated construction equipment and method for self-vibration jet grouting anchor rod |
| CN109026099A (en) * | 2018-07-05 | 2018-12-18 | 安徽理工大学 | A kind of soft-rock tunnel full length fastening supporting construction and its construction method |
| CN109026099B (en) * | 2018-07-05 | 2023-09-12 | 安徽理工大学 | Soft rock roadway full-length anchoring supporting structure and construction method thereof |
| CN113737789A (en) * | 2021-11-03 | 2021-12-03 | 成都理工大学 | Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer |
| CN113737789B (en) * | 2021-11-03 | 2022-02-18 | 成都理工大学 | Self-drilling type reinforcing system and self-drilling type reinforcing method for soft soil layer |
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| CF01 | Termination of patent right due to non-payment of annual fee |