CN206859522U - A kind of grout sleeve fixture - Google Patents
A kind of grout sleeve fixture Download PDFInfo
- Publication number
- CN206859522U CN206859522U CN201720669328.1U CN201720669328U CN206859522U CN 206859522 U CN206859522 U CN 206859522U CN 201720669328 U CN201720669328 U CN 201720669328U CN 206859522 U CN206859522 U CN 206859522U
- Authority
- CN
- China
- Prior art keywords
- column
- grout sleeve
- reel assembly
- sleeve
- fixture
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of grout sleeve fixture, including reel assembly, magnet ring, magnetic column and rubber sealing boot；The reel assembly includes the small shell of column that the diameter that is sequentially connected increases successively, big shell of column and spacing section, wherein a mounting hole is provided with the center of big shell of column and spacing section of one end, for installing magnetic column；An annular groove is formed between spacing section of center and edge of the reel assembly, for installing magnet ring；The big shell of column overcoat of the reel assembly has a rubber sealing boot.The utility model disclosure satisfy that positioning and sealing needs of the modern prefabricated concrete structure prefabricated components grout sleeve in template, save mould material, easy to use, automation dismounting can be achieved, rubber parts loss is small, production efficiency is high, there is good popularizing application prospect in precast concrete field.
Description
Technical field
Technical field of building construction is the utility model is related to, will be pre- in component more particularly in precast concrete production
The grout sleeve buried is fixed on the sleeved mount on component template.
Background technology
Sleeve grouting connection method is the important connecting method for reinforcing bars applied to prefabricated concrete structure, is mainly used in connecting
The steel bar stress of prefabricated components, when precast concrete produces, grout sleeve is embedded in the end of component, and pre-buried
Grout sleeve position should be accurate, to ensure prefabricated components at the construction field (site) and prefabricated components or the company of prefabricated components and cast-in-place structural
Connecing reinforcing bar smoothly can install and connect.Usual prefabricated components are in plant produced, the connection reinforcing bar of grout sleeve and prefabricated components
Colligation is into steel reinforcement cage together, is then placed on steel reinforcement cage in the template that prefabricated components are poured in die station, the connection reinforcing bar of stretching will
It is accurately positioned with template, grout sleeve will also be attached with template, be fixed, while carry out seal approach to socket port, prevent
Only cement mortar enters sleeve from socket port during casting concrete.
Mainly grout sleeve is fixed using the screw holder with rubber blanket for China's prefabricated components production at present
And sealing, this sleeved mount needs to drill on the fixed position of grout sleeve in template in advance, by with rubber blanket
The screw rod of screw holder passes through the hole from die inside, and locking nut is loaded onto on one section that screw rod stretches out outside template, fills
Sleeve is starched on rubber blanket of the template inner sleeve in fixture and after being adjacent to template, by relatively rotating the fixture outside template
Screw rod and nut, by the rubber blanket compression-expansion of template inner barrel fixture, and be adjacent to the inwall of grout sleeve, and will set
Cylinder is fixed, this ensure that the relative position of sleeve and template and the sealing to grout sleeve inner chamber.In the set of this structure
On the basis of cylinder fixture, a kind of fixture using cam mechanism is there have been developed, the fixture is simply with pull bar, cam-like support
The locking mode of screw rod, nut is instead of with handle, the direction to outside template pulls handle rotation cam support by pull bar, in template
The pull bar termination of side insertion sleeve inner chamber is pressed on rubber blanket in template, and the fixation to sleeve is realized by the expansion of rubber blanket
And sealing, the fixture are also required to the perforate in template, making pull bar, the fixture fastens from being passed on the inside of template on the outside of template
The production efficiency of sleeve is higher than screw fixture.In addition, also a kind of new fastener, using screw plug structure, it is
Need on the outside of the template through the fixing hole in template and the threaded connection of inner side grout sleeve endoporus port, by grout sleeve with
Template is connected and fixed.The common deficiency of all these sleeved mounts is：1st, it is required for opening a hole, nothing in template
By the diameter in the hole, template perforate all has influence on the recycling of the template, causes the waste of mould material；2nd, installation is fixed
Sleeve and rotating nuts are all needed to tightening or unclamp when removing, it is difficult to which, with manipulator completion related work, efficiency is low, cost of labor
It can not reduce；3rd, using rubber blanket fixture also because rubber blanket in fastening and release will repeatedly large deformation and inevitably
Breakage, add the cost of production consumptive material.
For the deficiency of existing grout sleeve fixture, prefabricated components factory wish it is a kind of without in template perforate,
Template accomplishes at utmost to reuse, and easy to install, service life length, and consumables cost is low, is easy to implement automation
The sleeved mount of production.
The content of the invention
To solve above-mentioned the deficiencies in the prior art, the utility model provides a kind of grout sleeve fixture.
To achieve the above object, the technical solution of the utility model is as follows：
A kind of grout sleeve fixture, including reel assembly, magnet ring, magnetic column and rubber sealing boot；
The reel assembly includes the small shell of column that the diameter that is sequentially connected increases successively, big shell of column and spacing section, wherein
A mounting hole is provided with the center of big shell of column and spacing section of one end, for installing magnetic column；
An annular groove is formed between spacing section of center and edge of the reel assembly, for installing magnet ring；
The big shell of column overcoat of the reel assembly has a rubber sealing boot.
Preferably, the reel assembly is assembled and combined respectively for position-arresting disk, lock sleeve and central shaft.
It is further preferred that the central shaft is provided with external screw thread at spacing section, the endoporus of the lock sleeve is provided with outer with this
Screw thread matching internal thread and with the central shaft spacing section be threadedly coupled；
The intermediate sleeve of the central shaft and lock sleeve sets position-arresting disk, and it is solid to screw extruding by the screw thread of central shaft and lock sleeve
Fixing limit disk.
Or it is further preferred that spacing section of the central shaft is smooth surface axle, the endoporus of the lock sleeve is unthreaded hole；
The position-arresting disk, lock sleeve are sequentially sleeved at spacing section, and welding manner is used between the lock sleeve and central shaft
Link together, position-arresting disk and lock sleeve are fixed with this.
The one end of the lock sleeve outside is provided with projection, and magnet ring is blocked for coordinating with position-arresting disk.
Preferably, the structure that the reel assembly is integrated.
Preferably, the big cylinder of the big shell of column is provided with groove, the one side that the rubber sealing boot is bonded with big cylinder
Provided with the rubber sleeve internal projection being engaged with the groove, inner surface other parts and the big cylinder of the rubber sealing boot closely paste
Close.
Preferably, the rubber sealing boot includes conical section in smoothing junction and cylindrical section, and wherein conical section is close to reel
The small shell of column of assembly, spacing section close to reel assembly of cylindrical section；
The external diameter of the cylindrical section is bigger 0.5-5mm than the grout sleeve internal diameter to be sealed, the minimum outer diameter of the conical section
Less than the grout sleeve internal diameter to be sealed.
Preferably, the reel assembly is magnetizable all kinds of ferrous materials.
Preferably, the magnet ring and magnetic column are the ndfeb magnet of axial charging.
Preferably, the mating surface of the magnet ring and magnetic column and reel assembly scribbles the resin or glue of binding function
Water.
Relative to conventional grout sleeved mount, the utility model tool has the advantage that：
1) mould material is saved, this new fastener devises the larger position-arresting disk of external diameter to install large-sized strong magnetic
Iron hoop, the magnet size for making to install on fixture substantially exceed external diameter and fixed less than the common shaft-like magnetic force of grout sleeve internal diameter
Part, there is powerful suction to be absorbed and fixed at body securely on the inside of template, meet need of the prefabricated components production to fixture
Will, template, which is not required to perforate, can also seal, fix grout sleeve, improve mould material repeat usage, reduce prefabricated components
Template cost；
2) easy to use, production efficiency is high, and this part size is small, in the suction of radial direction non-magnet suction or very little, only position-arresting disk
Closing working face has powerful axial the suction-combining force, therefore can be mounted and dismounted automatically using manipulator, can when particularly dismantling
, can be easily by position-arresting disk one end of reel assembly using set tubing tool cover this part of switching on the small shell of column of reel assembly
Template surface is left in tilting, magnet ring and magnetic column is greatly reduced with the suction-combining force of template away from template, is then torn this part open
New position is unloaded or is moved to, it is simple, convenient；
3) the rubber sealing boot external diameter of this part is more than the grout sleeve endoporus of its sealing, and grout sleeve is first enclosed on this fixture
The minimum outer diameter of rubber sealing boot is less than the conical section of grout sleeve internal diameter, then vertically to the template direction of fixture institute adhesive
Promote, rubber sealing boot obtains radial deformation by sleeve inner wall compressive, and grout sleeve end face reaches rubber sealing boot cylindrical section and leaned on
After tight position-arresting disk, grout sleeve internal chamber wall is to be coordinated by the radial compression formed to rubber sealing boot, is realizing socket port
While sealing, also ensure grout sleeve end and keep accurate coaxial relation with fixture, compared to consolidating in template perforate
Determine part, grout sleeve center deviation caused by eliminating the gap between screw rod and pattern hole, be advantageous to improve grouting set
The registration of cylinder, and the deformation of rubber seal is small, long lifespan, and loss is far smaller than the rubber blanket of classic screw fixture
Consumption, reduces component production cost.
The utility model disclosure satisfy that positioning of the modern prefabricated concrete structure prefabricated components grout sleeve in template
Being needed with sealing, save mould material, easy to use, automation dismounting can be achieved, rubber parts loss is small, and production efficiency is high,
There is good popularizing application prospect in precast concrete field.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the structural representation of the utility model embodiment 2.
Fig. 3 is the structural representation of the utility model embodiment 3.
Fig. 4 is the structural representation of the utility model embodiment 4.
Description of reference numerals：1- position-arresting disks；2- central shafts；The small shell of columns of 21-；The big shell of columns of 22-；The big cylinders of 221-；23- is spacing
Section；3- lock sleeves；31- is raised；4- magnet rings；5- magnetic columns；6- rubber sealing boots；61- cylindrical sections；62- conical sections；The outer spiral shells of 7-
Line；8- internal threads；9- centre bores；10- magnetic column mounting holes；11- grooves；12- rubber sleeve internal projections；13- reel assemblys；
14- precast-concrete forms；15- grout sleeves；16- pads.
Embodiment
In conjunction with implementation and accompanying drawing to construction, shape and the further details of explanation of feature of the present utility model.It should manage
Solution, the present embodiment is merely to illustrate the utility model, rather than limits the scope of protection of the utility model.
A kind of split type grout sleeve fixture of embodiment 1
A kind of grout sleeve fixture as shown in Figure 1 is the fixture of split-type structural, by the position-arresting disk 1 of steel, in
Mandrel 2, lock sleeve 3 and magnet ring 4, magnetic column 5, rubber sealing boot 6 form, and the central shaft 2 divides for small shell of column 21, big shell of column
22 and external thread section 23, the external thread section 23 of the central shaft 2 be provided with external screw thread 7, the endoporus of the lock sleeve 3 is provided with and center
The internal thread 8 that the external screw thread 7 of axle 2 is engaged, the screw thread of external thread section 23 of the lock sleeve 3 and central shaft 2 coordinates, by position-arresting disk
1 extruding is fixed between big shell of column 22 and lock sleeve 3.
A magnetic column mounting hole 10 is provided with the external thread section 23 of the central shaft 2 and adjacent big shell of column 22, in described
The diameter of the big shell of column 22 of mandrel 2 is more than the external diameter of external thread section 23, and the big cylinder of big shell of column 22 is provided with groove 11, the magnetic
Iron hoop 4 and the neodymium iron boron strong magnet that magnetic column 5 is axial charging, the inner surface of the rubber sealing boot 6 are provided with rubber sleeve convex
12 are played, the magnet ring 4 is arranged in the annular recess between position-arresting disk 1 and lock sleeve 3, the one end of the lock sleeve 3 outside
Provided with an annular projection 31, magnet ring 4 is blocked for coordinating with position-arresting disk 1, the magnetic column 5 is arranged on the magnet of central shaft 2
In post mounting hole 10.
The rubber sealing boot 6 is enclosed on the big cylinder 221 of the big shell of column 22 of the central shaft 2, and in rubber sealing boot 6
The rubber sleeve internal projection 12 on surface falls in the groove 11 of the big cylinder 221 of the central shaft 2, and the interior table of rubber sealing boot 6
Face other parts and the outer surface of the big cylinder 221 of central shaft 2 are fitted close.The external diameter of the small shell of column 21 is less than the rubber
The external diameter of sealing shroud 6.
The outer surface of the rubber sealing boot 6 includes cylindrical section 61 in smoothing junction and conical section 62, its middle cylindrical section 61
External diameter it is identical with the external diameter at the larger external diameter end of conical section 62, and it is big than it to be intended to seal the diameter of bore of fixed grout sleeve
0.5mm~5mm, the external diameter at the smaller external diameter end of conical section 62 is smaller more than 1mm than its larger external diameter end external diameter, and is intended to less than it close
The diameter of bore of the fixed grout sleeve of sealing；
The external diameter of the position-arresting disk 1 of the split-type structural sleeved mount is more than 50mm.
Magnet ring 4 and magnetic column 5 scribble the tree with binding function with position-arresting disk 1, lock sleeve 3, the mating surface of central shaft 2
Fat or glue.
The side of sleeved mount installation magnet ring 4 and magnetic column 5 be working face, is existed by assigned position suction during use
On precast-concrete form 14 (such as Fig. 3).Because the larger position-arresting disk 1 of external diameter can install large-sized strong magnet ring 4, make this solid
The magnet size for determining to install on part substantially exceeds the common shaft-like magnetic fasteners that external diameter is less than grout sleeve internal diameter, has powerful
Body is absorbed and fixed at the inner side of precast-concrete form 14 by suction securely, meets need of the prefabricated components production to fixture
Will, template 14, which is not required to perforate, can also seal, fix grout sleeve, improve mould material repeat usage, reduce prefabricated structure
The template cost of part；Meanwhile there is powerful suction in radial direction non-magnet suction or very little, the adhesive working face of only position-arresting disk 1, because
This can be mounted and dismounted automatically using manipulator, can be used set tubing tool cover to be pulled on position-arresting disk 1 when particularly dismantling
Turn this part, tilt easily one end of position-arresting disk 1 and leave template surface, make magnet ring and magnetic column away from template, with template
The suction-combining force be greatly reduced, then this fixture is removed or moved to new position, it is simple, convenient；
During fixed grout sleeve, grout sleeve 15 is less than grouting from the minimum outer diameter of rubber sealing boot 6 of sleeved mount and covered
The conical section 62 of cylinder internal diameter is inserted in, then is promoted vertically to the template direction of fixture institute adhesive, and the end face of grout sleeve 15 is arrived
It is close to up to rubber sealing boot cylindrical section 61 and with the back side of grout sleeve fixture position-arresting disk 1, the cylindrical section 61 of rubber sealing boot 6
External diameter is more than the endoporus of the grout sleeve 15 of its sealing, and the internal chamber wall of grout sleeve 15 is the shape of cylindrical section 61 to rubber sealing boot 6
Radially compress, while socket port sealing is realized, the end of grout sleeve 15 is maintained with fixture accurate same
Axle relation, compared to the fixture of the perforate in template, in grout sleeve caused by eliminating the gap between screw rod and pattern hole
Heart position deviation, be advantageous to improve the registration of grout sleeve, and the deformation of rubber seal is small, long lifespan, and loss is remote
Rubber blanket much smaller than classic screw fixture consumes, and reduces component production cost.
A kind of split type grout sleeve fixture of embodiment 2
As shown in Fig. 2 a kind of grout sleeve fixture, the difference with embodiment 1 are, the endoporus of lock sleeve 3 be unthreaded hole, in
Mandrel 2 and the abutting end of lock sleeve 3 are optical axis, and after position-arresting disk 1 is enclosed on the central shaft 2, lock sleeve 3 is also enclosed on central shaft 2,
Position-arresting disk 1 is pressed between big shell of column 22 and lock sleeve 3, lock sleeve 3 is linked together with central shaft 2 using welding method,
The thickness of position-arresting disk 1 in the axial direction is between 6~20mm.The one end of the lock sleeve 3 outside is convex provided with the point-like of more than 2
31 are played, magnet ring 4 is blocked for coordinating with position-arresting disk 1.Had using the grout sleeve fixture of welding and assemble simpler spy
Point is identical with embodiment above using function and advantage.
A kind of split type grout sleeve fixture of embodiment 3
As shown in figure 3, a kind of grout sleeve fixture, the difference with embodiment 1 are, the projection 31 on lock sleeve 3 is not
It can only coordinate with position-arresting disk 1 and block magnet ring 4, can also coordinate with central shaft 2 and block magnetic column 5, make the anchor structure
It is more stable.
A kind of integral type grout sleeve fixture of embodiment 4
As shown in figure 4, be a kind of integral type grout sleeve fixture, by reel assembly 13, magnet ring 4, magnetic column 5,
Rubber sealing boot 6 forms, and the reel assembly 13 uses spheroidal graphite cast-iron or after blank is made with casting technique in cast steel material, then
It is made of machine cut processing method, split-type structural sleeved mount position-arresting disk 1 described in its resemblance and embodiment 1,
Sub-assembly resemblance after central shaft 2 is combined with lock sleeve 3 is identical, and the reel assembly 13 is straight by what is be sequentially connected
Small shell of column 21, big shell of column 22 and spacing section 24 composition, the magnet ring 4 that footpath increases successively are arranged on the ring of reel assembly 13
In shape groove, the magnetic column 5 is arranged in the magnetic column mounting hole 10 of reel assembly 13 and annular recess homonymy.The axle
The external diameter of disk assembly 13 is more than 50mm.
The big cylinder of the big shell of column 22 is provided with groove 11, and the magnet ring 4 and magnetic column 5 are the neodymium iron of axial charging
Boron strong magnet, the inner surface of the rubber sealing boot 6 are provided with rubber sleeve internal projection 12, and the magnet ring 4 combines installed in reel
In the annular recess that the center of body 13 is formed with edge, the magnetic column that the magnetic column 5 is arranged on reel assembly 13 is installed
In hole 10, the rubber sealing boot 6 is enclosed on the big cylinder 221 of the big shell of column 22 of the reel assembly 13, and rubber seal
The rubber sleeve internal projection 12 for covering 6 inner surfaces falls in the groove 11 of the big cylinder 221 of the reel assembly 13, and rubber seal
The inner surface other parts of set 6 are fitted close with the outer surface of big cylinder 221.The external diameter of the small shell of column 21 is less than the rubber
The external diameter of sealing shroud 6.
The outer surface of the rubber sealing boot 6 includes cylindrical section 61 in smoothing junction and conical section 62, its middle cylindrical section 61
External diameter it is identical with the external diameter at the larger external diameter end of conical section 62, and it is big than it to be intended to seal the diameter of bore of fixed grout sleeve
0.5mm~5mm, the external diameter at the smaller external diameter end of conical section 62 is smaller more than 1mm than its larger external diameter end external diameter, and is intended to less than it close
The diameter of bore of the fixed grout sleeve of sealing；
Spacing section 24 of external diameter of the integral structure sleeved mount is more than 50mm.
Spacing section 24 of axial width of the integral structure sleeved mount is between 6~20mm.
The mating surface of magnet ring 4 and magnetic column 5 and reel assembly 13 scribbles resin or glue with binding function.
Integral type grout sleeve fixture, installation is more convenient, identical with embodiment above using function and advantage.
Description of the present utility model is merely illustrative above, and it is nonrestrictive, and those skilled in the art should be managed
Solution, many modifications, change or equivalent can be carried out to it within the spirit and scope that claim limits, but they will all fall
Enter in the scope of protection of the utility model.
Claims (10)
1. a kind of grout sleeve fixture, it is characterised in that including reel assembly, magnet ring, magnetic column and rubber sealing boot；
The reel assembly includes the small shell of column that the diameter that is sequentially connected increases successively, big shell of column and spacing section, wherein big
The center of shell of column and spacing section of one end is provided with a mounting hole, for installing magnetic column；
An annular groove is formed between spacing section of center and edge of the reel assembly, for installing magnet ring；
The big shell of column overcoat of the reel assembly has a rubber sealing boot.
2. grout sleeve fixture as claimed in claim 1, it is characterised in that the reel assembly is position-arresting disk, locking
Set and central shaft assemble combine respectively.
3. grout sleeve fixture as claimed in claim 2, it is characterised in that the central shaft is provided with outer spiral shell at spacing section
Line, the endoporus of the lock sleeve be provided with the internal thread that is matched with the external screw thread and with the central shaft spacing section be threadedly coupled；
The intermediate sleeve of the central shaft and lock sleeve sets position-arresting disk, and the fixed limit of extruding is screwed by the screw thread of central shaft and lock sleeve
Position disk.
4. grout sleeve fixture as claimed in claim 2, it is characterised in that spacing section of the central shaft is smooth surface axle,
The endoporus of the lock sleeve is unthreaded hole；
The position-arresting disk, lock sleeve are sequentially sleeved at spacing section, are connected between the lock sleeve and central shaft using welding manner
Together, position-arresting disk and lock sleeve are fixed with this.
5. the grout sleeve fixture as described in claim 3 or 4, it is characterised in that the one end of the lock sleeve outside is provided with
Projection, magnet ring is blocked for coordinating with position-arresting disk.
6. grout sleeve fixture as claimed in claim 1, it is characterised in that the structure that the reel assembly is integrated.
7. grout sleeve fixture as claimed in claim 1, it is characterised in that the big cylinder of the big shell of column is provided with ditch
Groove, the one side that the rubber sealing boot is bonded with big cylinder are provided with the rubber sleeve internal projection being engaged with the groove, the rubber
The inner surface other parts of sealing shroud are brought into close contact with big cylinder.
8. grout sleeve fixture as claimed in claim 1, it is characterised in that the rubber sealing boot includes in smoothing junction
Conical section and cylindrical section, wherein conical section are close to the small shell of column of reel assembly, spacing section close to reel assembly of cylindrical section；
The external diameter of the cylindrical section is bigger 0.5-5mm than the grout sleeve internal diameter to be sealed, and the minimum outer diameter of the conical section is less than
The grout sleeve internal diameter to be sealed.
9. grout sleeve fixture as claimed in claim 1, it is characterised in that the reel assembly is magnetizable all kinds of
Ferrous materials；
The magnet ring and magnetic column are the ndfeb magnet of axial charging.
10. grout sleeve fixture as claimed in claim 1, it is characterised in that the magnet ring and magnetic column and reel group
Fit mating surface scribbles the resin or glue of binding function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720669328.1U CN206859522U (en) | 2017-06-09 | 2017-06-09 | A kind of grout sleeve fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720669328.1U CN206859522U (en) | 2017-06-09 | 2017-06-09 | A kind of grout sleeve fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206859522U true CN206859522U (en) | 2018-01-09 |
Family
ID=60831269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720669328.1U Expired - Fee Related CN206859522U (en) | 2017-06-09 | 2017-06-09 | A kind of grout sleeve fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206859522U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328742A (en) * | 2019-07-29 | 2019-10-15 | 长沙远大住宅工业集团股份有限公司 | A kind of prefabricated post production mould and production method |
| CN111042120A (en) * | 2019-11-26 | 2020-04-21 | 浙江大学城市学院 | High-sensitivity anti-skid bored pile foundation for soft soil area and construction method of high-sensitivity anti-skid bored pile foundation |
-
2017
- 2017-06-09 CN CN201720669328.1U patent/CN206859522U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328742A (en) * | 2019-07-29 | 2019-10-15 | 长沙远大住宅工业集团股份有限公司 | A kind of prefabricated post production mould and production method |
| CN111042120A (en) * | 2019-11-26 | 2020-04-21 | 浙江大学城市学院 | High-sensitivity anti-skid bored pile foundation for soft soil area and construction method of high-sensitivity anti-skid bored pile foundation |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 |