CN208415267U - Miniature steel pipe pile prestressed anchor rope combination supporting system - Google Patents
Miniature steel pipe pile prestressed anchor rope combination supporting system Download PDFInfo
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- CN208415267U CN208415267U CN201820758078.3U CN201820758078U CN208415267U CN 208415267 U CN208415267 U CN 208415267U CN 201820758078 U CN201820758078 U CN 201820758078U CN 208415267 U CN208415267 U CN 208415267U
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- steel pipe
- connecting structure
- waist rail
- pipe pile
- supporting system
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Abstract
The utility model relates to construction site Base hole supporting technology fields, especially a kind of miniature steel pipe pile prestressed anchor rope combination supporting system, including crown beam, more root canal bodies are equipped at intervals with along slope surface length direction, multiple lateral waist rail connecting structure are transversely provided with along slope surface short transverse, multiple longitudinal waist rail connecting structure are longitudinally equipped with along slope surface length direction, lateral waist rail connecting structure and longitudinal waist rail connecting structure form the first netted protection body, the second netted protection body is equipped with below the first netted protection body, first, two netted protection bodies are equipped with fixed part, first, protective net is equipped between two netted protection bodies and tube body, in protective net and first, two netted protection bodies are equipped with concrete shield, concrete shield is equipped with multiple sluicing portions, the utility model is easy for construction, foundation pit sideline is easy to control, by to anchor pole Rope applies Prestressing, effectively controls slope deforming, and high reliablity, effect is obvious, has preferable popularizing value.
Description
Technical field
The utility model relates to construction site Base hole supporting technology field, especially a kind of miniature steel pipe pile prestressed anchor
Rope combination supporting system.
Background technique
With the development of urban construction, a large amount of high level is emerged around existing building, often construction site is narrow
And proximate building, Slope Stability is affected and proposed place surrounding enviroment are complicated excavating, away from existing structure compared with
Closely, pipeline is more, and when stringent to deformation requirements deep foundation pit support, traditional slope excavation has been unable to satisfy deep foundation pit support
It is required that there are many deficiencies, such as vertical cut local instability, backbreak, explosion, catalase and unfavorable structural plane etc. are formed
The danger of adverse slope, supporting and excavation construction difficulty are big, and foundation pit sideline is not easy to control, are unfavorable for shoveling and bursting work, globality
It is poor, and cannot effectively control slope deforming, how under the execution conditions in no slope space, it is ensured that the excavation of deep basal pit and
And the safety of Adjacent Buildings, it has also become the technical problem in foundation pit support construction.
Summary of the invention
The purpose of this utility model is to provide a kind of miniature steel for many deficiencies existing for traditional pattern foundation pit supporting structure at present
Tubular pile pre-stress anchor pole rope combination supporting system, can effectively solve at no slope space, the support issues of deep basal pit, guarantee deep
The safety of foundation pit and surrounding building.
In view of the deficienciess of the prior art, the utility model miniature steel pipe pile prestressed anchor rope combination supporting system is wanted
The technical issues of solution, is adopted the technical scheme that: miniature steel pipe pile prestressed anchor rope combination supporting system, including setting
The crown beam being made of concrete layer and reinforcing bar at the top of construction slope surface is equipped at intervals with more both ends along slope surface length direction and distinguishes
It is connected to the tube body of crown beam and bottom of foundation ditch, multiple lateral waist rail connecting structure are transversely provided with along slope surface short transverse, along slope surface
Length direction is longitudinally equipped with multiple longitudinal waist rail connecting structure connecting with lateral waist rail connecting structure, the transverse direction waist rail connection
Construction forms the first netted protection body for preventing slope surface from collapsing for covering slope surface with longitudinal waist rail connecting structure, netted first
The second netted protection body is equipped with below protection body, the second netted protection body includes more and is connected with stringer, along stringer
Direction extends to the vertical muscle and the more horizontal bars being connected with vertical muscle of bottom of foundation ditch, in horizontal bar and vertical muscle
Junction, and the junction of longitudinal waist rail connecting structure and lateral waist rail connecting structure are equipped with fixed part, netted first
Protective net is equipped between protection body, the second netted protection body and tube body, in protective net and the first netted protection body, second netted anti-
Watch box is equipped with concrete shield, and the concrete shield is equipped with multiple sluicing portions.
Above-mentioned miniature steel pipe pile prestressed anchor rope combination supporting system, the fixed part includes multiple hole locations, and
The anchor pole rope being set in hole location.
Above-mentioned miniature steel pipe pile prestressed anchor rope combination supporting system, the transverse direction waist rail connecting structure includes along hole
The concrete layer by reinforcing bar package being tied up the reinforcing bar of fasciculation by more and being set on reinforcing bar that position is laterally arranged forms
Crossbeam, the crossbeam bottom width are greater than cross rail top width, and one is equipped between crossbeam bottom and cross rail top and is used for two
The inclined surface of person's connection, the hole location are opened on inclined surface.
Above-mentioned miniature steel pipe pile prestressed anchor rope combination supporting system, the longitudinal direction waist rail connecting structure includes along hole
The longitudinally disposed concrete layer by reinforcing bar package being tied up the reinforcing bar of fasciculation by more and being set on reinforcing bar in position forms
Stringer, the stringer cross section are square.
Above-mentioned miniature steel pipe pile prestressed anchor rope combination supporting system, the vertical muscle and horizontal bar are reinforcing bar.
Above-mentioned miniature steel pipe pile prestressed anchor rope combination supporting system, the protective net are by transverse direction and longitudinal direction reinforcing bar
The steel mesh of composition, the steel mesh are single layer, are equipped with the soil nailing for connecting steel mesh in top of the slope.
Above-mentioned miniature steel pipe pile prestressed anchor rope combination supporting system, the tube body are diameter 108mm, wall thickness 5mm
Steel pipe.
Above-mentioned miniature steel pipe pile prestressed anchor rope combination supporting system, the anchor pole rope free segment are polyethylene jacket
Pipe, anchor cable body of rod centering bracket are plastic stent, are equipped with a secondary grouting pipe in the middle part of anchor cable bar.
Above-mentioned miniature steel pipe pile prestressed anchor rope combination supporting system, the sluicing portion are 2m* including spacing in length and breadth
2m, the drain hole of slope 5%, and the tapping pipe being set in drain hole, the tapping pipe water inlet are connected with hole location, water outlet
Mouth is connected with drain hole, and drain hole inlet side is equipped with pebble sac drainage layer, filter screen is equipped in tapping pipe, at foundation pit bottom
Portion is equipped with drainage area.
The beneficial effect of the utility model miniature steel pipe pile prestressed anchor rope combination supporting system is, by construction slope
The crown beam that setting is made of concrete layer and reinforcing bar at the top of face, is equipped at intervals with more both ends along slope surface length direction and is connected to
The tube body of crown beam and bottom of foundation ditch, effectively avoids backbreaking, explosion, catalase and unfavorable structural plane etc. form the danger of adverse slope,
Slope Stability is advantageous, is transversely provided with multiple lateral waist rail connecting structure along slope surface short transverse, longitudinal along slope surface length direction
Equipped with multiple longitudinal waist rail connecting structure connecting with lateral waist rail connecting structure, lateral waist rail connecting structure and longitudinal waist rail connect
It connects construction and forms the first netted protection body for preventing slope surface from collapsing for covering slope surface, the is equipped with below the first netted protection body
Two netted protection bodies, the second netted protection body include more and are connected with stringer, extend to bottom of foundation ditch along stringer direction
Vertical muscle and the more horizontal bars being connected with vertical muscle connect in the junction of horizontal bar and vertical muscle, and longitudinal waist rail
The junction for connecing construction and lateral waist rail connecting structure is equipped with fixed part, in the first netted protection body, the second netted protection body
It is equipped with protective net between tube body, concrete protection is equipped on protective net and the first netted protection body, the second netted protection body
Layer, globality are well stablized, and concrete shield is equipped with multiple sluicing portions, and convenient for draining, the utility model is easy for construction, base
Hole sideline is easy to control, and by applying Prestressing to anchor pole rope, effectively controls slope deforming, high reliablity, effect is obvious, tool
There is preferable popularizing value.
Detailed description of the invention
Fig. 1 is the main view of the utility model；
Fig. 2 is the left view of the utility model；
Fig. 3 is the cross-sectional view of the second netted protection body；
Fig. 4 is the structural schematic diagram that anchor pole rope is connect with crossbeam.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described in further details the utility model.
As shown in Figure 1,2,3, 4, miniature steel pipe pile prestressed anchor rope combination supporting system, including it is set to construction slope surface
The crown beam 1 being made of concrete layer and reinforcing bar at top is equipped at intervals with more both ends along slope surface length direction and is connected to hat
Beam 1 and the tube body of bottom of foundation ditch 2, the tube body 2 are diameter 108mm, and the steel pipe of wall thickness 5mm, steel-pipe pile drilling is using mesohigh
Bore process, spacing 1.0m；After steel pipe is put into, it is inserted into Grouting Pipe in steel duct, Grouting Pipe is inserted into bottom hole, then retreat 300 ~
500mm starts slip casting, and 0.5 neat slurry of the ratio of mud is perfused, is returned out by steel pipe bottom extravasating hole, slurries continuously fill from bottom to top
Note, until being filled in entire steel pipe and stake holes.Grouting Pipe is at the uniform velocity extracted with the injection of cement slurry, if aperture without excessive slurry,
Slurry is mended in time.After cement slurry injection, in addition to the infiltration of the also oriented rock-soil layer of the solidification shrinkage of itself, aperture slurries is caused to bounce back,
Back-grouting technique should be used, benefit slurry one arrives secondary in time, guarantees that aperture slip casting is full, enters crown beam 0.3m at the top of steel-pipe pile.Steel
The main reinforcement of tubular pole and crown beam after the completion of reinforcing bar binding, formwork erection, pours C20 concrete using being welded to connect.
Multiple lateral waist rail connecting structure are transversely provided with along slope surface short transverse, the transverse direction waist rail connecting structure includes edge
The concrete layer by reinforcing bar package being tied up the reinforcing bar of fasciculation by more and being set on reinforcing bar that hole location is laterally arranged forms
Crossbeam 3,3 bottom width of crossbeam is greater than cross rail top width, is equipped with and one is used between crossbeam bottom and cross rail top
The inclined surface 4 that the two is connected, is longitudinally equipped with multiple longitudinal waists connecting with lateral waist rail connecting structure along slope surface length direction
Beam connecting structure, the longitudinal direction waist rail connecting structure include being tied up the reinforcing bar of fasciculation by more and being set along hole location is longitudinally disposed
It is placed in the stringer 5 of the concrete layer composition by reinforcing bar package on reinforcing bar, the stringer cross section is square, the transverse waist
Beam connecting structure and longitudinal waist rail connecting structure form the first netted protection body for preventing slope surface from collapsing for covering slope surface, the
It is equipped with the second netted protection body below one netted protection body, the second netted protection body includes more and is connected with stringer,
The vertical muscle 6 and the more horizontal bars 7 being connected with vertical muscle 6 of bottom of foundation ditch, the vertical muscle are extended to along stringer direction
6 with horizontal bar 7 be reinforcing bar, and in the junction of horizontal bar and vertical muscle, and longitudinal waist rail connecting structure is connect with transverse direction waist rail
The junction of construction is equipped with fixed part, and the fixed part includes multiple hole locations, and the anchor pole rope 8 being set in hole location, hole
Position is opened on inclined surface, and the anchor pole rope free segment is polyethylene cannula, the body of rod is isolated with cement slurry, it is ensured that the body of rod section
Free Transform, prestressed anchor bar material use 15.2 underrelaxation high strength steel strand of Φ, normal intensity 1860MPa, the anchor cable body of rod
Centering bracket is plastic stent, is equipped with a secondary grouting pipe in the middle part of anchor cable bar, determines hole according to design requirement before armature boring
Position, hole location vertical direction tolerance are ± 50mm, and horizontal direction tolerance is ± 30mm, and drill hole inclination tolerance is
3%, bore diameter 130mm.Armature boring takes casing follow-up mode, and anchor pole rope should be put into hole immediately after pore-forming, bored
Hole should be more than Soil Anchor Design length 0.5m, be placed into what is performed in hole together with the standoff body of rod together with once grouting pipe,
Grouting Pipe is first inserted into bottom hole, then retreats 300 ~ 500mm, starts slip casting, slurries continuous pouring from bottom to top, and ensure out of hole
Smoothly draining, gas.Grouting Pipe is at the uniform velocity extracted with the injection of cement slurry, if slurry is mended without excessive slurry in aperture in time.Prestressed anchor Suo Yan
Lattice press design length blanking, allowable error 50mm, and exposed tensioning length is determined according to tensioning equipment.
Protective net 9 is equipped between the first netted protection body, the second netted protection body and tube body, the protective net is by cross
To and longitudinal reinforcement form steel mesh, the steel mesh be single layer, paving hang 6.5@200mm single-layer bidirectional of steel grid φ, use
Longitudinal waist rail connecting structure and lateral waist rail connecting structure are fixed in slope surface, the lap of splice at least 300mm between mesh sheet.Injection
Concrete, concrete strength C20, thickness 80mm.Concrete ratio is sprayed, cement: middle sand: graded broken stone (partial size is not more than 15mm)=1:2:2,
After the earth excavation of stake face, linked network simultaneously carries out concrete spray concrete, and spray concrete thickness is not less than 80mm, is equipped in top of the slope for connecting
The soil nailing of steel mesh, reinforcing rib is arranged in steel mesh top and soil nailing binding connects.Soil nailing uses the screw-thread steel of HRB400 diameter 25, long
Degree and horizontal space are 1.5 meters.It is positioned manually and is driven into, guarantee its length before constructing and be driven into angle and meet design requirement.
Concrete shield 12, the coagulation are equipped on protective net and the first netted protection body, the second netted protection body
Native protective layer be equipped with multiple sluicing portions, the sluicing portion include in length and breadth spacing be 2m*2m, the drain hole 10 of slope 5%, and
The tapping pipe being set in drain hole, material are that the pvc of caliber 50 is managed, total length 400mm, protruded length 100mm, the sluicing
Water inlet tube mouth is connected with hole location, and water outlet is connected with drain hole, and 10 inlet side of drain hole is equipped with pebble sac drainage layer, (tight
Do not make drainage layer when pasting rock stratum), using dank material, filter screen is equipped in tapping pipe, iron wire tightens, after being placed in tapping pipe
Concrete on the outside of pipe is uniformly smeared into reality, is left no gaps, is equipped with drainage area 11 in bottom of foundation ditch.
In the construction process, it is noted that the deviation proportion of miniature steel pipe pile drilling axis is no more than steel pipe pile length
1%.Hole depth is not less than Design of Steel-tube Piles length, but is not also preferably greater than the 200mm of design length.
Miniature steel pipe pile drills to projected depth, should stagnate 1 ~ 2min, and blow into hole, and rock powder in hole is dried up
Only.Drilling blocks aperture before finishing slip casting, prevents in sundries and soil bits access aperture, bottom hole sediment is not more than 200mm.
After miniature slip casting, before slurry solidifies completely, forbids to collide, rocks steel pipe.
Bolthole finishes in drilling and blocks aperture using cement package bags before slip casting, prevents sundries and soil bits access aperture
It is interior.
Grouting P.O42.5 cement, by 0.50 ratio of mud mixing.Cement slurry should stir evenly, with mixing with once mixing
The cement slurry of sum should be finished before initial set, and prevent that stone, sundries are mixed into.
Slope surface cleaning: earthwork evacuation finishes and behind thick pingbian slope, should use manual amendment slope surface, exclude surface dust or danger
Stone reduces the rebound degree of concrete, the purpose of the smooth beauty of surface layer to reach the bond strength of enhancing concrete surface layer and side slope.
Start suitably reduce spray distance when injection, concrete is made to squeeze into steel mesh behind, guarantees that steel mesh is wrapped completely by concrete
It wraps up in, when spray skin layer concrete, then suitably widens spray distance to 0.6 ~ 1.2 meter, keep concrete jetting thickness uniform, surfacing.
Surface thickness is detected with bar dowel immediately after injection, as thickness is unsatisfactory for requiring spraying one time again again.
Free section can uniformly smear one layer of butter or housing plastic bellows hose, and fasten.
The tensioning of anchor pole should anchoring body intensity and waist rail concrete strength reach design strength 80% after can be into
Row, and by design prestressing force lock value locking.Before body of rod processing, strength test sampling observation is carried out to material, guarantees the tension of the body of rod
Power.
Bolt cement uses P.O42.5 cement, the ratio of mud 0.40~0.5, and bolt grouting uses secondary grouting technique.
In construction, every procedure performs process record, stringent to check and accept, and not by inspection, must not enter next process.Anchor
Bar construction size and tolerance see the table below
All construction personnel are before being on duty, it is necessary to carry out post education, learn act of technique for security and rules and regulations, peace
The performance and application of full protection facility, personal protective equipment use and keeping etc., can be on duty operation after examination is qualified.
Twice flak jacket railing is set with Ф 48mm steel pipe around away from foundation pit side 0.6m, upright bar spacing 2m is higher by naturally
Level ground 1.2m, buried depth 0.8m.
Forbid mound, windrow within the scope of foundation pit upper brim 1m and parks equipment.It mustn't within the scope of bolt-spary supports 5m suitable for reading
Loaded vehicle stops.
In Excavation Process, bucket is forbidden to collide supporting construction (waist rail, anchor pole rope, concrete mask etc.), excavates tight in place
Taboo is backbreak.
Warning sign is set during foundation pit construction, night adds red colored lamp mark.
Adopt an effective measure control construction in fugitive dust, bagged cement must cover, must not random air storage, Yi Mianyu
Leaching.
Personnel into site operation must put on work clothes, safe wearing cap, gloves, goggles, etc. labour protections use
Product.
When opening work position, it is necessary to which closing electrical switching is simultaneously cut off the power.When using electric tool, unsuitable band gloves.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model,
It should also belong to the protection scope of the utility model.
Claims (9)
1. miniature steel pipe pile prestressed anchor rope combination supporting system, including be set at the top of construction slope surface by concrete layer and
The crown beam of reinforcing bar composition, which is characterized in that be equipped at intervals with more both ends along slope surface length direction and be connected to crown beam and foundation pit
The tube body of bottom is transversely provided with multiple lateral waist rail connecting structure along slope surface short transverse, is longitudinally equipped with along slope surface length direction
Multiple longitudinal waist rail connecting structure connecting with lateral waist rail connecting structure, the transverse direction waist rail connecting structure and longitudinal waist rail connect
It connects construction and forms the first netted protection body for preventing slope surface from collapsing for covering slope surface, the is equipped with below the first netted protection body
Two netted protection bodies, the second netted protection body include more and are connected with stringer, extend to foundation pit bottom along stringer direction
The vertical muscle in portion and the more horizontal bars being connected with vertical muscle, in the junction of horizontal bar and vertical muscle, and longitudinal waist
The junction of beam connecting structure and lateral waist rail connecting structure is equipped with fixed part, in the first netted protection body, second netted anti-
It is equipped with protective net between watch box and tube body, concrete is equipped on protective net and the first netted protection body, the second netted protection body
Protective layer, the concrete shield are equipped with multiple sluicing portions.
2. miniature steel pipe pile prestressed anchor rope combination supporting system according to claim 1, characterized in that the fixation
Portion includes multiple hole locations, and the anchor pole rope being set in hole location.
3. miniature steel pipe pile prestressed anchor rope combination supporting system according to claim 2, characterized in that the transverse direction
Waist rail connecting structure include laterally be arranged along hole location by more tie up the reinforcing bar of fasciculation and be set on reinforcing bar by reinforcing bar
The crossbeam of the concrete layer composition of package, the crossbeam bottom width is greater than cross rail top width, in crossbeam bottom and crossbeam top
An inclined surface for connecting the two is equipped between portion, the hole location is opened on inclined surface.
4. miniature steel pipe pile prestressed anchor rope combination supporting system according to claim 2, characterized in that the longitudinal direction
Waist rail connecting structure include along hole location it is longitudinally disposed by more tie up the reinforcing bar of fasciculation and be set on reinforcing bar by reinforcing bar
The stringer of the concrete layer composition of package, the stringer cross section is square.
5. miniature steel pipe pile prestressed anchor rope combination supporting system according to claim 1, characterized in that described vertical
Muscle and horizontal bar are reinforcing bar.
6. miniature steel pipe pile prestressed anchor rope combination supporting system according to claim 1, characterized in that the protection
Net is the steel mesh being made of transverse direction and longitudinal direction reinforcing bar, and the steel mesh is single layer, is equipped in top of the slope for connecting steel mesh
Soil nailing.
7. miniature steel pipe pile prestressed anchor rope combination supporting system according to claim 1, characterized in that the tube body
For diameter 108mm, the steel pipe of wall thickness 5mm.
8. miniature steel pipe pile prestressed anchor rope combination supporting system according to claim 2, characterized in that the anchor pole
Rope free segment is polyethylene cannula, and anchor cable body of rod centering bracket is plastic stent, is equipped with a secondary grouting pipe in the middle part of anchor cable bar.
9. miniature steel pipe pile prestressed anchor rope combination supporting system according to claim 1, characterized in that the sluicing
Portion include in length and breadth spacing be 2m*2m, the drain hole of slope 5%, and the tapping pipe being set in drain hole, the tapping pipe into
The mouth of a river is connected with hole location, and water outlet is connected with drain hole, and drain hole inlet side is equipped with pebble sac drainage layer, in tapping pipe
Equipped with filter screen, drainage area is equipped in bottom of foundation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820758078.3U CN208415267U (en) | 2018-05-21 | 2018-05-21 | Miniature steel pipe pile prestressed anchor rope combination supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820758078.3U CN208415267U (en) | 2018-05-21 | 2018-05-21 | Miniature steel pipe pile prestressed anchor rope combination supporting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208415267U true CN208415267U (en) | 2019-01-22 |
Family
ID=65115000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820758078.3U Expired - Fee Related CN208415267U (en) | 2018-05-21 | 2018-05-21 | Miniature steel pipe pile prestressed anchor rope combination supporting system |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108797599A (en) * | 2018-05-21 | 2018-11-13 | 青岛建集团有限公司 | Miniature steel pipe pile prestressed anchor rope combination supporting system |
| CN109914422A (en) * | 2019-03-01 | 2019-06-21 | 华北水利水电大学 | A kind of steel pipe and soil nailing combined type foundation pit supporting construction and construction method |
| CN110055974A (en) * | 2019-04-24 | 2019-07-26 | 兰州理工大学 | A kind of recyclable miniature steel pipe pile soil nailing combined support structure and its recovery method |
| CN110424422A (en) * | 2019-08-09 | 2019-11-08 | 江苏楼翔建设有限公司 | A kind of combination protection blanket |
| WO2021017871A1 (en) * | 2019-07-31 | 2021-02-04 | 青岛理工大学 | Micro steel pipe pile body displacement monitoring device and method |
-
2018
- 2018-05-21 CN CN201820758078.3U patent/CN208415267U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108797599A (en) * | 2018-05-21 | 2018-11-13 | 青岛建集团有限公司 | Miniature steel pipe pile prestressed anchor rope combination supporting system |
| CN109914422A (en) * | 2019-03-01 | 2019-06-21 | 华北水利水电大学 | A kind of steel pipe and soil nailing combined type foundation pit supporting construction and construction method |
| CN110055974A (en) * | 2019-04-24 | 2019-07-26 | 兰州理工大学 | A kind of recyclable miniature steel pipe pile soil nailing combined support structure and its recovery method |
| WO2021017871A1 (en) * | 2019-07-31 | 2021-02-04 | 青岛理工大学 | Micro steel pipe pile body displacement monitoring device and method |
| CN110424422A (en) * | 2019-08-09 | 2019-11-08 | 江苏楼翔建设有限公司 | A kind of combination protection blanket |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190122 Termination date: 20200521 |
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| CF01 | Termination of patent right due to non-payment of annual fee |