CN201297042Y - Outside prestressing force structure of reinforced concrete beam - Google Patents
Outside prestressing force structure of reinforced concrete beam Download PDFInfo
- Publication number
- CN201297042Y CN201297042Y CNU2008201788089U CN200820178808U CN201297042Y CN 201297042 Y CN201297042 Y CN 201297042Y CN U2008201788089 U CNU2008201788089 U CN U2008201788089U CN 200820178808 U CN200820178808 U CN 200820178808U CN 201297042 Y CN201297042 Y CN 201297042Y
- Authority
- CN
- China
- Prior art keywords
- steel
- reinforced concrete
- turning
- bearing
- concrete beam
- 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
Links
Images
Landscapes
- Rod-Shaped Construction Members (AREA)
Abstract
The utility model relates to an outside prestressing force structure of a reinforced concrete beam, belonging to the field of civil engineering. The outside prestressing force structure is used for reinforcing a prior reinforced concrete beam due to load increase, quality defect, fire damage, corrosion damage, and the like. The outside prestressing force structure comprises high tensile underrelaxation unbonded steel strands (3) or stranded galvanized steel wires, an anchor device (8), a beam bottom turning corner armor pressure-bearing angle steel (4), a beam surface turning steel plate (5), a concrete column angle turning angle steel (6), an anchoring plate (7), and the like, wherein the resultant force of the high tensile underrelaxation unbonded steel strands (3), which is formed at the turning positions of the beam surface and the beam bottom, is acted on a pressure-bearing steel plate and the turning angle steel and then transmitted to a beam body, thus certain internal force is generated in the reinforced concrete beam to balance the action of external load so as to enhance the bearing capacity of the reinforced concrete beam.
Description
Affiliated technical field
The utility model relates in the building structure various concrete beam because of reasons such as load increase, mass defect, fire damage, corrosion and damage, needs to improve existing bearing capacity or recovers original bearing capacity and take the external prestressing structure reinforced.Field of civil engineering.
Background technology
To the reinforcing of concrete beam, increasing section method, displacement coagulation local method are arranged at present, add electrothermal prestressing, glue the shaped steel method outward, paste carbon fiber composite wood method, affixing steel plate method, setting support method etc.In " concrete structure reinforcement design specifications " GB50367-2006, what add the employing of electrothermal prestressing reinforced concrete beam is girt or strut-framed draw bar method, material is: " when the stretching force of reinforcing when 150KN is following, the HPB235 grade reinforcing steel that available two diameters are 12～30mm; When the prestressing force of reinforcing is bigger, use the HRB335 grade reinforcing steel, when the depth of section of reinforcement during greater than 600mm, applied reinforcing pull rod." girt or strut-framed pull bar apply that prestressed mode employing machine is opened method or with stretching screw transverse stretching method.
The defective that electrothermal prestressing exists that adds among " concrete structure reinforcement design specifications " GB50367-2006 is: 1. material HPB235 level, HRB335 grade reinforcing steel or shaped steel, has low strong high loose shortcoming, the steel appearance is as without concrete protective, its temperature influence is comparatively outstanding, time one is long, steel can be loose, and prestressed failure needs to reinforce again; 2. ruggedized construction supports backing plate, bar reinforcement, stretching screw etc. because of need are provided with, and makes the external superfluous thing of beam bigger, as adopting the concreting topping, certainly will increase the width and the depth of beam of beam section, influences the use in house and attractive in appearance; 3. do not adopt the protection of concreting method, the corrosion problem of steel also is difficult to overcome; Both there had been the structural safety problem in long-term use, had indoor aesthetic problem again; 4. normal section bending resistance, sloping section shearing resistance are effective in a short time, and the antitorque bearing capacity of beam can't improve; 5. tensioner does not have a complete set of equipment and synchronous anchoring accessory; Or adopt the transverse stretching method, but the stretching screw pulling force is limited, and not having actual measurement pulling force numerical value, promptly effective stretching force is very little and numerical value is inaccurate.
For this reason, the utility model provides a kind of external prestressing structure of reinforced concrete beam, and the problems referred to above are solved one by one.
Summary of the invention
1. technical problem to be solved in the utility model
The external prestressing structure of reinforced concrete beam, existing concrete beam is had now normal section bending resistance, sloping section shearing resistance and antitorque bearing capacity or recovers former design bearing capacity because of reasons such as load increase, mass defect, fire damage, corrosion and damage need improve, at a kind of external prestressing structure of the external increase of beam.
2. the external prestressing structure of reinforced concrete beam is formed
(1) main material
Size and load effect situation according to beam, select high-strength low loose non-bending steel cable or stranded galvanized steel for use, line directly adopts listed φ among " Code for design of concrete structures " GB50010-2002 and " unbonded prestressed concrete structure tecnical regulations " JGJ92-2004, J409-2005
s8.6,9.5,10.8,11.1,12.7,12.9,15.2,15.7, tensile strength f
Ptk=1570,1670,1720,1770,1860,1960N/mm
2Deng and the ground tackle that matches.Generally select φ in the stabilization works for use
s12.7, φ
s15.24, f
Ptk=1860N/mm
2Non-bending steel cable or stranded galvanized steel and supporting ground tackle get final product.
(2) form
The external prestressing structure of reinforced concrete beam turns to corner protector pressure-bearing angle steel, beam face to turn to steel plate, concrete column angle to turn to corner protector pressure-bearing angle steel, anchor plate etc. to form at the bottom of by high-strength low loose non-bending steel cable or stranded galvanized steel, ground tackle, beam.
3. technical scheme
Adopt the winding cluster to reinforce to concrete beam, promptly from the initiating terminal of beam, a branch of or multi beam steel strand rotate around the longitudinal axis of beam in the direction of the clock, and around the terminal to beam, another bundle or multi beam are pressed rotation counterclockwise around the terminal to beam at same initiating terminal.The force action that steel strand turning point at the bottom of beam face, beam forms in the pressure-bearing steel plate, turn on the angle steel, reach the beam body again, make beam produce certain internal force, in order to the effect of the external load of balance, to improve the bearing capacity of beam.
Specifically, penetrate respectively from post outside anchor plate with the twice steel strand, the two sides of being close to suspension column intersect to beam face hogging moment zone, when distance post medial surface 1/3～1/4 beam clear span length, bend downwards and be close to the beam two sides down to beam at the bottom of, in horizontal plane at the bottom of the beam, intersect again, steel strand arrive another side from a side of beam respectively, the turnover back goes upward to the beam face along beam sides, arrive the hogging moment cut off place of the beam other end, turnover intersects in the hogging moment zone to horizontal plane again, extends to post outside anchoring thereafter along the post side.
Turn to the angle steel corner protector pressure-bearing at the suspension column place steel strand at beam two ends and the turnover contact position at post right angle; Steel strand are transferred in the beam face at beam two ends hogging moment cut off place and are turned to the steel plate pressure-bearing when descending; Steel strand turn to the angle steel corner protector pressure-bearing when transferring at the bottom of the beam.
Steel strand are after stretch-draw, and in the vertical plane of beam side elevation, common property is given birth to two pairs of vertical forces that direction is opposite, and these two pairs of power are to the normal section bending resistance of beam, and reinforcement effect is played in the sloping section shearing resistance; Simultaneously, in the horizontal plane of the both sides of beam, also produce two pairs of horizontal forces that direction is opposite, the two ends of beam also have the pressure of a pair of steel strand tension, this has just constituted concrete bodies and has been in three-dimensional stress state, has further improved the shear resistance of beam, twines the steel strand and the concrete that are bundled in Liang Tishang and forms cooperative structure, steel strand participate in antitorque calculating, and this just significantly improves the torsional property of beam.The existence of above-mentioned these power is also played certain reinforcement effect to the globality of beam.
4. beneficial effect
(1) adopt high-strength low loose non-bending steel cable, structure is in long use, and prestressing effect can remain unchanged substantially, satisfies the expection requirement of engineering reinforcement.
(2) layout of steel strand is close to component surface, adopts mortar levelling, whitewashes and can play a protective role.
(3) the member section size after the reinforcing only increases 3～5cm, does not significantly change the size of structural element, and after whitewashing, outward appearance be can't see the vestige of reinforcing.
(4) beam is played the reinforcing of torsional property of bending resistance, sloping section shearing resistance and the beam of effective normal section.
(5) globality of beam is also played to a certain degree reinforcement effect.
(6) steel strand adopt the special-purpose jack tension mode of prestressing force, and stretching force numerical value is accurately obvious, and the reinforcing amount is evidence-based.
Description of drawings
Accompanying drawing 1 is the external prestressing structure figure of cluster reinforced concrete beam.
Among the figure, the 1st, concrete column, the 2nd, be reinforced beam, the 3rd, steel strand, the 4th, turn to corner protector pressure-bearing angle steel at the bottom of the beam, the 5th, the beam face turns to steel plate, and the 6th, the post angle turns to corner protector pressure-bearing angle steel, the 7th, anchor plate, the 8th, ground tackle.
Accompanying drawing 2 is to turn to corner protector pressure-bearing angle cross section figure at the bottom of the beam, it is long to turn to angle steel generally to get 60～80cm, adopts L50 * 5 or L63 * 6 angles with equal legs, and outer right angle will grind arc surface with abrasive machine or Angle polishing machine, be convenient to steel strand and seamlessly transit, the right angle can cut off steel strand after stretch-draw is stressed.
Accompanying drawing 3 is that the beam face turns to the steel plate sectional view, turns to steel plate length generally to get deck-siding+2 * 2cm and gets final product, and the right angle that contacts with steel strand also needs to wear into arc surface, width 5～10cm, thickness 6～8mm.
Anchor plate is custom-designed according to concrete stabilization works, most importantly to guarantee to have certain rigidity, it is thick that thickness of slab is generally 2cm, still not enough as rigidity, then need at the plate face stiffening rib of burn-oning, because various engineering component sizes are different, its anchor plate also need be made multiple shape and size, in " the theoretical and application of high efficient prestress reinforcing method " book that the utility model applicant Li Yanhe, Chen Gui, Japanese plum woods etc. are write, detailed introduction is arranged, this book is that Science Press publishes, Beijing, in May, 2008 front page.
The specific embodiment
When a concrete beam (2) when needing reinforcement, by structural calculation, calculate required reinforcing amount, draw the line footpath, radical and the control stress for prestressing that adopt the external prestressing steel strand, working drawing draws.According to working drawing; the unwrapping wire of on the beam face, fixing a point; mark the beam face and turn to the distance of steel plate (5) apart from post limit (1); on the plate face of beam side, hole; dig out on the limit, hole and to lay the shallow slot that the beam face turns to steel plate (5), coat structure glue after the shallow slot cleaning, be stained with the beam face and turn to steel plate (5); this stirrup that beam is exposed is protected, simultaneously tight and fixed between steel plate (5) and the top surface of the beam.Be upward through plate bottom outlet mouth and tension at the bottom of the beam with cotton rope, find out steel strand and tighten up the back, the right angle of turning point beam is ground off, about R=1cm, do the fillet that makes angle steel (4) like this and be all arc transition with the beam inferior horn and cooperate in the turning point of beam inferior horn.Steel strand (3) pierce into the anchoring plate hole from the post outside or beam-ends, after intersecting for the first time, top surface of the beam passes concrete slab, pasting beam sides to the soffit, intersect to the another side of beam for the second time again in the soffit, last folding passes through concrete slab to top surface of the beam, stretches out the post outside or beam anchorage after top surface of the beam intersects again.When wearing concrete slab under top surface of the beam intersects the back for the first time, steel strand turn to steel plate (5) pressure-bearing with the beam face, steel strand during from beam sides steering beam bottom surface with turning to corner protector pressure-bearing angle steel (4) pressure-bearing to turn at the bottom of the beam, when steel strand are met concrete column at the two ends of beam, because of general post is wider than deck-siding, certainly will can directly be pressed on the concrete of post angle by steel strand, therefore also adopt the post angle to turn to corner protector angle steel (6) pressure-bearing to turn to.When bigger shearing need be born in the two ends of concrete beam, in the time of only still can not satisfying with the ruggedized construction of accompanying drawing 1, then need increase the shearing resistance steel strand, the shearing resistance steel strand are pressed accompanying drawing 1 substantially and are arranged, only be on the beam face at adjacent two suspension column places, respectively to establish two beam faces again to turn to pressure-bearing steel plate (5), the Φ 10 flat steel hoop circles (isometric) of burn-oning on the steel plate (5) with deck-siding, after steel strand wear out on intersecting at the bottom of the slave plate at the bottom of the beam, from flat ring steel ring, pass, do not intersect, directly pass from the post side, enter the anchor plate anchoring, concrete grammar has special introduction in " the theoretical and application of high efficient prestress reinforcing method " book.
The steel strand at the upper and lower and side of beam, suspension column place adopt 1:2 cement mortar (30～50mm is thick) to whitewash protection; anchored end is built C30 pea gravel concreten containment vessel; carry out waterproof measure simultaneously; these safeguard measure contents all can be with reference to the way introduction in " the theoretical and application of high efficient prestress reinforcing method " book.
Claims (1)
1. the external prestressing structure of reinforced concrete beam, this structure is characterized in that steel strand (3) cross wire in the end hogging moment zone on concrete beam (2) face, the back steel strand that intersect are located to transfer downwards at the bottom of the beam at pressure-bearing steel plate (5), turning to angle steel (4) to locate to transfer again to intersect the turning on the angle steel (4) of another side edge of extending to beam at the bottom of the beam, upwards transfer again to the face of beam face pressure-bearing steel plate (5), in the other end hogging moment zone of beam, intersect for the third time and stretch out beam-ends to post (1) outside anchoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201788089U CN201297042Y (en) | 2008-11-14 | 2008-11-14 | Outside prestressing force structure of reinforced concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201788089U CN201297042Y (en) | 2008-11-14 | 2008-11-14 | Outside prestressing force structure of reinforced concrete beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201297042Y true CN201297042Y (en) | 2009-08-26 |
Family
ID=41043020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201788089U Expired - Fee Related CN201297042Y (en) | 2008-11-14 | 2008-11-14 | Outside prestressing force structure of reinforced concrete beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201297042Y (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832033A (en) * | 2010-04-08 | 2010-09-15 | 李青松 | Strengthening method for armoured concrete slab |
| CN102913028A (en) * | 2012-02-01 | 2013-02-06 | 于天庆 | Concrete telegraph pole and other prefabricated concrete components capable of being easily carried and locally assembled with prestressing force |
| CN102936965A (en) * | 2012-11-20 | 2013-02-20 | 淮海工学院 | Method for strengthening reinforced concrete beam through distributed external prestressing cables |
| CN103216036A (en) * | 2013-04-03 | 2013-07-24 | 哈尔滨工程大学 | Bent-loading light-weight reinforced concrete beam structure |
| CN103711137A (en) * | 2013-12-02 | 2014-04-09 | 南京工业大学 | Method of reinforcing low-strength concrete beams and slabs |
| CN103953202A (en) * | 2014-02-26 | 2014-07-30 | 华侨大学 | Reinforcing device and reinforcing method of prestressed steel wire rope of reinforced concrete girder |
| CN105133849A (en) * | 2015-07-29 | 2015-12-09 | 河海大学 | Prestress device for prestress FRP sheet material reinforced concrete beam and applying method |
| CN105755960A (en) * | 2016-03-14 | 2016-07-13 | 沈阳建筑大学 | Method for preventing middle beam of T-shaped beam bridge from generating lateral bending deformation |
| CN105937304A (en) * | 2016-05-27 | 2016-09-14 | 上海二十冶建设有限公司 | Reinforcing device for industrial factory building column hoisting and application method thereof |
| CN107165059A (en) * | 2017-04-07 | 2017-09-15 | 华侨大学 | A kind of construction method of the anti-bend reinforced device of bridge prestress high-strength steel cord |
| CN107304633A (en) * | 2016-04-19 | 2017-10-31 | 郑州大学 | A kind of shaped steel, high strength steel strand and polymer mortar composite reinforcement mode |
| CN107630564A (en) * | 2017-09-12 | 2018-01-26 | 叶长青 | The ruggedized construction of beams of concrete |
| CN109057155A (en) * | 2017-01-03 | 2018-12-21 | 郑瑞平 | A kind of beams of concrete improving Torsion bearing capacity |
| CN109826457A (en) * | 2019-01-29 | 2019-05-31 | 广东庆余堂建筑科技有限公司 | Concrete building structures and beams of concrete prestressed reinforcement device |
| CN110318557A (en) * | 2019-07-19 | 2019-10-11 | 江苏东南特种技术工程有限公司 | A kind of prefabricated concrete hollow slab reinforcing device and method |
| CN111677328A (en) * | 2017-01-12 | 2020-09-18 | 叶香竹 | Prestressed steel strand reinforced concrete beam structure |
| CN111827704A (en) * | 2019-04-17 | 2020-10-27 | 深圳市中固建筑加固技术有限公司 | Reinforced concrete structure and reinforcing method |
| CN112282411A (en) * | 2020-09-30 | 2021-01-29 | 中国建筑第八工程局有限公司 | Beam bending shear reinforcing equipment utilizing prestressed carbon fiber cloth and reinforcing method thereof |
-
2008
- 2008-11-14 CN CNU2008201788089U patent/CN201297042Y/en not_active Expired - Fee Related
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832033A (en) * | 2010-04-08 | 2010-09-15 | 李青松 | Strengthening method for armoured concrete slab |
| CN102913028A (en) * | 2012-02-01 | 2013-02-06 | 于天庆 | Concrete telegraph pole and other prefabricated concrete components capable of being easily carried and locally assembled with prestressing force |
| CN102913028B (en) * | 2012-02-01 | 2016-01-27 | 于天庆 | A kind of concrete electric pole and other prefabricated concrete elements gently can taking prestressing force assembling on the spot |
| CN102936965A (en) * | 2012-11-20 | 2013-02-20 | 淮海工学院 | Method for strengthening reinforced concrete beam through distributed external prestressing cables |
| CN103216036A (en) * | 2013-04-03 | 2013-07-24 | 哈尔滨工程大学 | Bent-loading light-weight reinforced concrete beam structure |
| CN103216036B (en) * | 2013-04-03 | 2015-05-20 | 哈尔滨工程大学 | Bent-loading light-weight reinforced concrete beam structure |
| CN103711137A (en) * | 2013-12-02 | 2014-04-09 | 南京工业大学 | Method of reinforcing low-strength concrete beams and slabs |
| CN103953202A (en) * | 2014-02-26 | 2014-07-30 | 华侨大学 | Reinforcing device and reinforcing method of prestressed steel wire rope of reinforced concrete girder |
| CN103953202B (en) * | 2014-02-26 | 2016-01-06 | 华侨大学 | A kind of reinforced concrete beam prestress rope bracing means and method thereof |
| CN105133849A (en) * | 2015-07-29 | 2015-12-09 | 河海大学 | Prestress device for prestress FRP sheet material reinforced concrete beam and applying method |
| CN105755960B (en) * | 2016-03-14 | 2017-05-10 | 沈阳建筑大学 | Method for preventing middle beam of T-shaped beam bridge from generating lateral bending deformation |
| CN105755960A (en) * | 2016-03-14 | 2016-07-13 | 沈阳建筑大学 | Method for preventing middle beam of T-shaped beam bridge from generating lateral bending deformation |
| CN107304633A (en) * | 2016-04-19 | 2017-10-31 | 郑州大学 | A kind of shaped steel, high strength steel strand and polymer mortar composite reinforcement mode |
| CN105937304B (en) * | 2016-05-27 | 2019-08-16 | 上海二十冶建设有限公司 | A kind of bracing means and application method for Columns in Industrial Buildings lifting |
| CN105937304A (en) * | 2016-05-27 | 2016-09-14 | 上海二十冶建设有限公司 | Reinforcing device for industrial factory building column hoisting and application method thereof |
| CN109057155B (en) * | 2017-01-03 | 2020-08-07 | 安徽赛特新型建材有限公司 | Concrete beam capable of improving torsion-resistant bearing capacity |
| CN109057155A (en) * | 2017-01-03 | 2018-12-21 | 郑瑞平 | A kind of beams of concrete improving Torsion bearing capacity |
| CN111677328A (en) * | 2017-01-12 | 2020-09-18 | 叶香竹 | Prestressed steel strand reinforced concrete beam structure |
| CN107165059A (en) * | 2017-04-07 | 2017-09-15 | 华侨大学 | A kind of construction method of the anti-bend reinforced device of bridge prestress high-strength steel cord |
| CN107165059B (en) * | 2017-04-07 | 2023-03-03 | 华侨大学 | Construction method of bridge prestress high-strength steel wire rope bending-resistant reinforcing device |
| CN107630564A (en) * | 2017-09-12 | 2018-01-26 | 叶长青 | The ruggedized construction of beams of concrete |
| CN110836023A (en) * | 2017-09-12 | 2020-02-25 | 叶长青 | Reinforcing construction method of concrete beam |
| CN107630564B (en) * | 2017-09-12 | 2020-04-10 | 叶长青 | Construction method for reinforced structure of concrete beam |
| CN109826457A (en) * | 2019-01-29 | 2019-05-31 | 广东庆余堂建筑科技有限公司 | Concrete building structures and beams of concrete prestressed reinforcement device |
| CN111827704A (en) * | 2019-04-17 | 2020-10-27 | 深圳市中固建筑加固技术有限公司 | Reinforced concrete structure and reinforcing method |
| CN110318557A (en) * | 2019-07-19 | 2019-10-11 | 江苏东南特种技术工程有限公司 | A kind of prefabricated concrete hollow slab reinforcing device and method |
| CN110318557B (en) * | 2019-07-19 | 2023-12-19 | 江苏东南特种技术工程有限公司 | Prestressed concrete hollow slab reinforcing device and method |
| CN112282411A (en) * | 2020-09-30 | 2021-01-29 | 中国建筑第八工程局有限公司 | Beam bending shear reinforcing equipment utilizing prestressed carbon fiber cloth and reinforcing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201297042Y (en) | Outside prestressing force structure of reinforced concrete beam | |
| CN203905239U (en) | Prestress hollow slab laminated floor system | |
| CN104727439B (en) | Assembly concrete pillar and beam structure and assembly connecting method | |
| CN204590362U (en) | The concrete folding plate floor of the band shear key improved | |
| CN207194146U (en) | Prestressing force assembly concrete frame joint attachment structure | |
| CN102587554A (en) | Laminated concrete slab connected by bending reinforcing steel bars by 180 degrees within span and connection method | |
| CN203213340U (en) | Reinforced masonry wall | |
| CN101696589A (en) | Novel combined stone beam | |
| CN201133085Y (en) | Structure for enhancing external prestressing force effect | |
| CN202990197U (en) | Lap joint rib type prestress double-direction composite slab | |
| CN201133088Y (en) | External prestressing force structure for lining structure house reinforcement | |
| CN103898834A (en) | Concrete-filled steel tube composite beam and trussed cable tower cable-stayed bridge and construction method thereof | |
| CN102051980A (en) | Prestress structure with tendon simultaneously acting as inner and outer elements | |
| CN106930436A (en) | A kind of reinforced concrete shear wall of built-in prestress steel diagonal brace | |
| CN103061452B (en) | Anti-seismic prestressed precast beam | |
| CN107724257A (en) | The ruggedized construction and its method of rc beam bridge | |
| CN205259195U (en) | Glass fiber reinforced pole and contain anchor rope and soil nail of this glass fiber reinforced pole | |
| CN107299711A (en) | The late poured band structure of prestressed concrete panel | |
| CN208907228U (en) | A kind of prestressing force modular retaining wall | |
| CN105952045A (en) | Pre-stress post-pouring floor construction method | |
| CN206693469U (en) | A kind of precast floor slab connecting node | |
| CN202450676U (en) | Composite slabs connected by using steel reinforcing bar 180-degree bending anchors and spiral bars in one span | |
| CN201507067U (en) | Novel combined stone beam | |
| CN101245626A (en) | Prefabricated slab for lamination | |
| CN101245628A (en) | Prefabricated slab for lamination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20101114 |