CN108190782A - For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch - Google Patents
For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch Download PDFInfo
- Publication number
- CN108190782A CN108190782A CN201810170117.2A CN201810170117A CN108190782A CN 108190782 A CN108190782 A CN 108190782A CN 201810170117 A CN201810170117 A CN 201810170117A CN 108190782 A CN108190782 A CN 108190782A
- Authority
- CN
- China
- Prior art keywords
- top pressure
- tensioning
- card device
- plate
- interior card
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 description 12
- 239000011513 prestressed concrete Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/26—Adaptations or arrangements of pistons
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses for the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch, including oil cylinder and mounted on in-oil cylinder piston, preceding compression ring, the first sealing plate, the second sealing plate and support set；The preceding compression ring, the first sealing plate, the second sealing plate are sleeved on piston；The support set is sleeved on oil cylinder end；Interior card device is additionally provided in the piston；The interior card device connection top pressure backhaul plate；The top pressure backhaul pressing plate is placed on the end of support set；The interior card device is additionally provided with adjustment bar, in the movable insertion of adjustment bar in card device.The present invention due in interior card device card device using integrated modular design, it is compact-sized, facilitate intermodule combination, decompose, facilitate individual module function debugging, when the steel strand wires of tensioning difference hole position, card device is convenient in replacement, takes short, raising working efficiency, the distance of tool anchor slab and work anchor is shorter, during tensioning, reserved steel strand wires are shorter, save steel strand wires.
Description
Technical field
The invention belongs to jack, particularly relate to very heavy for the interior card to the deeper girder tensioning of beam-ends tensioning duct notch
Top.
Background technology
Since the 1980s, prestressed concrete be widely used in large public building, executive information systems,
The modern projects such as Longspan Bridge and multi storied industrial factory building.Especially highway, the circuit of high-speed railway special line are most of
It is made of bridge, the major bearing structures of bridge use prestressed reinforced concrete construction.At present, in the design of prestressed concrete
Theory, computational methods, component series, structural system, tensioning rollering fastening system, prestressing techniques, presstressed reinforcing steel and concrete material
Etc. formd a set of unique system；In terms of the construction technology of prestressed concrete and construction management, accumulate
Tire out and enriched to obtain experience.Among these, it is to be applied to answer by dedicated tensioning equipment for the prefabricated of simple prestressed concrete beam
Power, jack have become indispensable as tensioning equipment.
Existing fastening type jack has problems with:
(1) moveable anchor of interior card device and the punching set of interior Ka Ding are to be connected through a screw thread, and the limiting plate of interior card device is to use
Bolt is fixed on the piston of interior Ka Ding, when the steel wire bundle for needing tensioning difference hole position, is clamped in assembling and disassembling
Trouble is put, takes about half an hour；
(2) since limiting plate is fixed by bolts, steel strand wires are easily rotated in tensioning, lead to bolt by not curved, internally clamping
It puts and interior Ka Ding has security risk, and remove inconvenience；
(3) moveable anchor is fixed using threaded connection, it is desirable that precision is high, when the screw thread of moveable anchor is not screwed into place, with regard to tensioning, easily going out
Accident；
(4) since moveable anchor is using being threadedly coupled, limiting plate fixed again with bolt, leads to moveable anchor, limiting plate, work anchor
The device to hole difficulty alignment of hole position, it is troublesome in poeration.
Invention content
Regarding to the issue above and the deficiencies in the prior art, the present invention provides regarding to the issue above and the prior art
Insufficient or defect, the present invention provides a kind of saving steel strand wires, easy to operate, fast, improve work efficiency, improve tensioning efficiency
And for the deeper fastening type jack of beam-ends mouth notch.
To achieve these goals, technical scheme is as follows：For to the deeper beam of beam-ends tensioning duct notch
The interior card jack of tensioning, including oil cylinder and mounted on in-oil cylinder piston, preceding compression ring, the first sealing plate, the second sealing
Plate and support set；The preceding compression ring, the first sealing plate, the second sealing plate are sleeved on piston；The support set is sleeved on oil cylinder end
Head；Interior card device is additionally provided in the piston；The interior card device connection top pressure backhaul plate；The top pressure backhaul pressing plate
It is placed on the end of support set；The interior card device is additionally provided with adjustment bar, in the movable insertion of adjustment bar in card device.
The present invention advanced optimizes, and the interior card device includes connecting cylinder, tool anchor slab and top pressure backhaul set；The company
Connect cylinder is sleeved on one end of tool anchor slab and is bolted；Big guide pipe and baffle are equipped in the connecting cylinder；Described
Baffle and big guide pipe are set on one end of tool anchor slab；Baffle, big guide pipe and the tool anchor slab is bolted；Institute
The moveable anchor board stated is embedded with tool clamping piece；The big guide pipe and baffle are embedded with small guide pipe；The small guiding pipe end
Head is equipped with annular groove, and the small guide pipe stretches out baffle side and limited by snap ring clamping；On the small guide pipe also
It is cased with intermediate plate retracting spring；The tool anchor slab other end end is equipped with top pressure backhaul pressing plate；The top pressure backhaul pressing plate
It is bolted on tool anchor slab；The top pressure backhaul set is sleeved on top pressure backhaul pressing plate centre position；The top pressure
Backhaul covers one end and is sleeved on tool anchor slab；The top pressure backhaul set other end is sleeved on top pressure backhaul plate.Interior card device is using collection
Compact-sized into modularized design, framework is flexible, facilitate intermodule combination, decompose, facilitate individual module function debugging, when
When drawing the steel strand wires of different holes position, card device is convenient in replacement, takes short, improves working efficiency, tool anchor slab and work anchor
Distance is shorter, and during tensioning, reserved steel strand wires are shorter, saves steel strand wires.
The present invention advanced optimizes, the top pressure backhaul plate, top pressure backhaul pressing plate, tool anchor slab, big guide pipe and gear
Macropore and adjustment rod aperture are equipped on plate；The quantity of the macropore is identical with the quantity of steel strand wires or at least one more；It is described
Adjustment rod aperture be two.It adjusts bar and is inserted into adjustment rod aperture, adjustment bar is adjusted so that top pressure backhaul plate, top pressure backhaul pressure
Macropore centering on plate, tool anchor slab, big guide pipe and baffle, it is fast to medium velocity, improve working efficiency, the quantity and steel of macropore
The quantity of twisted wire it is identical or at least it is more more than one, the scope of application is big, the macropore having more, and does not influence tensioning work.
The present invention advanced optimizes, and groove is equipped in the piston；The groove is equipped with bayonet；The interior card
The connecting cylinder of device is equipped with the circular arc convex block to match with the bayonet.Interior card device is pushed into piston, on connecting cylinder
The convex fast upper bayonet for being inserted into piston of circular arc and can the rotational slide in groove, prevent interior card device from sliding, assemble simple side
Just.
The present invention advanced optimizes, and the support set end is equipped with card slot；The card slot is equipped with bayonet；The top
It pushes back journey plate and is equipped with the circular arc convex block being mutually matched with bayonet.Circular arc convex block on top pressure backhaul plate is placed on the bayonet of support set
Place and it can be rotated along arc neck and realize screens, prevent top pressure backhaul pressing plate from falling, assembling is simple.
The operation principle of the present invention：By the end of support set push-in oil cylinder, sealed successively from another end push-in second of oil cylinder
Plate, piston, interior card device, the first sealing plate and preceding compression ring, top pressure backhaul plate on the termination point casing of support set, then with adjustment bar pair
Position allows interior card device with top pressure backhaul plate, with hole position, jack is inserted in beam-ends notch, carries out tensioning work, dismounting is that its is inverse
Process.
Invention has the advantage that and has the beneficial effect that:
1. the present invention is since for card device using integrated modular design, compact-sized, framework is flexible, facilitates mould in interior card device
It combines, decompose between block, facilitate individual module function debugging, when the steel strand wires of tensioning difference hole position, card device is convenient in replacement,
Take short, raising working efficiency.
2. sealing plate I of the present invention and sealing plate II, which are played, prevents oil cylinder oil leak, preceding compression ring plays compression and fixed work
With support set is suitable in the deeper engineer application of beam-ends mouth, and jack does not need to support tube, can save steel strand wires.
3. the present invention is since the distance of moveable anchor and work anchor is shorter, during tensioning, reserved steel strand wires are shorter, save
Steel strand wires, the length that steel strand wires are reserved about 200-300mm.
4. the present invention is to hang over the punching of interior card jack to put on, and top pressure backhaul plate due to the moveable anchor of interior card device
It is to hang on the bayonet of piston, is free, when tensioning, steel strand wires rotation, internal card jack and interior card device does not have
It influences, securely and reliably.
Description of the drawings
Fig. 1 is the fastening type jack overall structure diagram of the present invention.
Fig. 2 is the front view of fastening type jack of the present invention entirety.
Fig. 3 is the fastening type jack A-A sectional views of the present invention.
Serial number and corresponding title in figure：
1- oil cylinders, 2- support sets, 3- adjustment bars, compression ring before 4-, the first sealing plates of 5-, 6- pistons, the second sealing plates of 7-, 8- gears
Plate, the big guide pipes of 9-, 10- tool clamping pieces, 11- tool anchor slabs, 12- top pressure backhaul sets, 13- top pressure backhaul pressing plates, 14- top pressures are returned
Journey plate, 15- connecting cylinders, the small guide pipes of 16-, 17- intermediate plate retracting springs.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
Embodiment 1：
As shown in Figs. 1-3, for the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch, including oil cylinder 1 and
Piston 6, preceding compression ring 4, the first sealing plate 5, the second sealing plate 7 and support set 2 in oil cylinder 1；The preceding compression ring
4th, the first sealing plate 5, the second sealing plate 7 are sleeved on piston 6；The support set 2 is sleeved on 1 end of oil cylinder；In the piston 6 also
Equipped with interior card device；The interior card device connection top pressure backhaul plate 14；The top pressure backhaul pressing plate 13 is placed on support set 2
End；The interior card device, which is additionally provided with, adjusts bar 3, in the 3 movable insertion of adjustment bar in card device.
The interior card device includes connecting cylinder 15, tool anchor slab 11 and top pressure backhaul set 12；The connecting cylinder 15 is sleeved on
It one end of tool anchor slab 11 and is bolted；Big guide pipe 9 and baffle 8 are equipped in the connecting cylinder 15；The gear
Plate 8 and big guide pipe 9 are set on one end of tool anchor slab 11；Baffle 8, big guide pipe 9 and the tool anchor slab 11 passes through bolt
Connection；11 inlay card of tool anchor slab has tool clamping piece 10；The big guide pipe 9 and baffle 8 are embedded with small guide pipe 16；Institute
16 end of small guide pipe stated is equipped with annular groove, and the small guide pipe 16 stretches out 8 side of baffle and limited by snap ring clamping；
Intermediate plate retracting spring 17 is also cased on the small guide pipe 16；11 other end end of tool anchor slab is equipped with top pressure backhaul
Pressing plate 13；The top pressure backhaul pressing plate 13 is bolted on tool anchor slab 11；The top pressure backhaul set 12 is sleeved on
13 centre position of top pressure backhaul pressing plate；The top pressure backhaul covers 12 one end and is sleeved on tool anchor slab 11；The top pressure backhaul set
12 other ends are sleeved on top pressure backhaul plate 14.
It is equipped on the top pressure backhaul plate 14, top pressure backhaul pressing plate 13, tool anchor slab 11, big guide pipe 9 and baffle 8
3 hole of macropore and adjustment bar；The quantity of the macropore is identical with the quantity of steel strand wires；3 hole of adjustment bar is two.
Groove is equipped in the piston 6；The groove is equipped with bayonet；On the connecting cylinder 15 of the interior card device
Equipped with the circular arc convex block to match with the bayonet.
2 end of support set is equipped with card slot；The card slot is equipped with bayonet；The top pressure backhaul plate 14 is equipped with
The circular arc convex block being mutually matched with bayonet.
The operation principle of the present invention：Support set 2 is pushed into the end of oil cylinder 1, push-in second is close from 1 another end of oil cylinder successively
Sealing plate 7, piston 6, interior card device, the first sealing plate 5 and preceding compression ring 4, top pressure backhaul plate 14 on the termination point casing of support set 2, then use
Adjustment bar 3 aligns, and interior card device and top pressure backhaul plate 14 is allowed jack to be inserted in beam-ends notch, carries out tensioning work with hole position,
Dismounting is its inverse process.
Embodiment 2：
2 difference from Example 1 of embodiment is that the top pressure backhaul plate, tool anchor slab, is led greatly at top pressure backhaul pressing plate
The quantity of macropore on pipe and baffle and the quantity of steel strand wires at least it is more more than one.The quantity of macropore and the quantity of steel strand wires
It is identical or at least it is more more than one, the scope of application is big, the macropore having more, and does not influence tensioning work.
Obviously, above-described embodiment is just for the sake of clearly illustrating example of the present invention, and is not the limit to implementation
It is fixed.For the those of ordinary skill in the field, it can also make on the basis of the above description other various forms of
Variation changes.There is no need and unable to all embodiment party's formulas with exhaustion.And it thus amplifies out obvious
Variation or variation are still in the protection scope of this invention.
Claims (5)
1. for the interior card jack of the girder tensioning deeper to beam-ends tensioning duct notch, including oil cylinder（1）And mounted on oil
Cylinder（1）Interior piston（6）, preceding compression ring（4）, the first sealing plate（5）, the second sealing plate（7）And support set（2）；The preceding pressure
Tight ring（4）, the first sealing plate（5）, the second sealing plate（7）It is sleeved on piston（6）On；The support set（2）It is sleeved on oil cylinder（1）End
Head；It is characterized in that, the piston（6）Inside it is additionally provided with interior card device；The interior card device connection top pressure backhaul plate（14）；
The top pressure backhaul pressing plate（13）It is placed on support set（2）End；The interior card device is additionally provided with adjustment bar（3）, it is described
Adjustment bar（3）In movable insertion in card device.
2. the interior card jack according to claim 1 for the girder tensioning deeper to beam-ends tensioning duct notch, special
Sign is that the interior card device includes connecting cylinder（15）, tool anchor slab（11）With top pressure backhaul set（12）；The connecting cylinder
（15）It is sleeved on tool anchor slab（11）One end and be bolted；The connecting cylinder（15）It is interior to be equipped with big guide pipe（9）With
Baffle（8）；The baffle（8）With big guide pipe（9）Set on tool anchor slab（11）One end；The baffle（8）, big be oriented to
Pipe（9）With tool anchor slab（11）It is bolted；The tool anchor slab（11）Inlay card has tool clamping piece（10）；Described is big
Guide pipe（9）And baffle（8）Embedded with small guide pipe（16）；The small guide pipe（16）End is equipped with annular groove, and described is small
Guide pipe（16）Stretch out baffle（8）It side and is limited by snap ring clamping；The small guide pipe（16）On be also cased with intermediate plate return
Journey spring（17）；The tool anchor slab（11）Other end end is equipped with top pressure backhaul pressing plate（13）；The top pressure backhaul pressure
Plate（13）It is bolted in tool anchor slab（11）On；The top pressure backhaul set（12）It is sleeved on top pressure backhaul pressing plate（13）In
Between position；The top pressure backhaul set（12）One end is sleeved on tool anchor slab（11）；The top pressure backhaul set（12）Another end cap
In top pressure backhaul plate（14）On.
3. the interior card jack according to claim 1 or 2 for the girder tensioning deeper to beam-ends tensioning duct notch,
It is characterized in that, the top pressure backhaul plate（14）, top pressure backhaul pressing plate（13）, tool anchor slab（11）, big guide pipe（9）And baffle
（8）On be equipped with macropore and adjustment bar（3）Hole；The quantity of the macropore is identical with the quantity of steel strand wires or at least one more；
The adjustment bar（3）Hole is two.
4. the interior card jack according to claim 1 for the girder tensioning deeper to beam-ends tensioning duct notch, special
Sign is, the piston（6）It is interior to be equipped with groove；The groove is equipped with bayonet；The connecting cylinder of the interior card device
（15）It is equipped with the circular arc convex block to match with the bayonet.
5. the interior card jack according to claim 1 for the girder tensioning deeper to beam-ends tensioning duct notch, special
Sign is, the support set（2）End is equipped with card slot；The card slot is equipped with bayonet；The top pressure backhaul plate（14）On
Equipped with the circular arc convex block being mutually matched with bayonet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170117.2A CN108190782A (en) | 2018-03-01 | 2018-03-01 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170117.2A CN108190782A (en) | 2018-03-01 | 2018-03-01 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108190782A true CN108190782A (en) | 2018-06-22 |
Family
ID=62594289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810170117.2A Pending CN108190782A (en) | 2018-03-01 | 2018-03-01 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108190782A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB764197A (en) * | 1954-10-13 | 1956-12-19 | P S C Equipment Ltd | A new or improved hydraulic jack |
| CN2284770Y (en) * | 1996-04-23 | 1998-06-24 | 柳州市建筑器具厂 | Automatic anchored hydraulic jack with prestressed rib |
| JPH1179700A (en) * | 1997-09-11 | 1999-03-23 | P S Co Ltd | Nervous jack |
| CN2666876Y (en) * | 2003-12-18 | 2004-12-29 | 柳州欧维姆机械股份有限公司 | Stretching jack with spacing device |
| CN201864524U (en) * | 2010-11-22 | 2011-06-15 | 安徽威世通预应力产品有限公司 | Energy-saving jack |
| CN104649180A (en) * | 2014-06-24 | 2015-05-27 | 柳州市威尔姆预应力有限公司 | Internal clamping type tension jack and construction method thereof |
| CN104909300A (en) * | 2015-05-14 | 2015-09-16 | 柳州泰姆预应力机械有限公司 | Intelligent front clamping type jack enabling construction to be achieved conveniently |
| CN204778596U (en) * | 2015-05-14 | 2015-11-18 | 柳州泰姆预应力机械有限公司 | Card formula jack before intelligence convenient to construction |
| CN106395674A (en) * | 2016-11-25 | 2017-02-15 | 柳州市邱姆预应力机械有限公司 | Intelligent front-clamping type jack |
| CN208135792U (en) * | 2018-03-01 | 2018-11-23 | 柳州煜乾机械装备股份公司 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
-
2018
- 2018-03-01 CN CN201810170117.2A patent/CN108190782A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB764197A (en) * | 1954-10-13 | 1956-12-19 | P S C Equipment Ltd | A new or improved hydraulic jack |
| CN2284770Y (en) * | 1996-04-23 | 1998-06-24 | 柳州市建筑器具厂 | Automatic anchored hydraulic jack with prestressed rib |
| JPH1179700A (en) * | 1997-09-11 | 1999-03-23 | P S Co Ltd | Nervous jack |
| CN2666876Y (en) * | 2003-12-18 | 2004-12-29 | 柳州欧维姆机械股份有限公司 | Stretching jack with spacing device |
| CN201864524U (en) * | 2010-11-22 | 2011-06-15 | 安徽威世通预应力产品有限公司 | Energy-saving jack |
| CN104649180A (en) * | 2014-06-24 | 2015-05-27 | 柳州市威尔姆预应力有限公司 | Internal clamping type tension jack and construction method thereof |
| CN104909300A (en) * | 2015-05-14 | 2015-09-16 | 柳州泰姆预应力机械有限公司 | Intelligent front clamping type jack enabling construction to be achieved conveniently |
| CN204778596U (en) * | 2015-05-14 | 2015-11-18 | 柳州泰姆预应力机械有限公司 | Card formula jack before intelligence convenient to construction |
| CN106395674A (en) * | 2016-11-25 | 2017-02-15 | 柳州市邱姆预应力机械有限公司 | Intelligent front-clamping type jack |
| CN208135792U (en) * | 2018-03-01 | 2018-11-23 | 柳州煜乾机械装备股份公司 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180622 |