CN105970829B - DJ180 railway bridge erecting machines set up 2209 sound barrier beam construction methods - Google Patents
DJ180 railway bridge erecting machines set up 2209 sound barrier beam construction methods Download PDFInfo
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- CN105970829B CN105970829B CN201610568115.XA CN201610568115A CN105970829B CN 105970829 B CN105970829 B CN 105970829B CN 201610568115 A CN201610568115 A CN 201610568115A CN 105970829 B CN105970829 B CN 105970829B
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
Description
Technical field
The present invention relates to technical field of bridge construction, specifically a kind of DJ180 railway bridge erecting machines set up 2209 sound barrier beams Construction method.
Background technology
DJ180 Bridge Erectors are former to be not more than 180t, span 33m and following railway prestressed reinforced concrete designed for setting up 2209 sound barrier beams, it is main to set up logical bridge（2012）2101st, 2201 Simple T-Girders.The machine category single armed freely-supported type, can realize full width machine The traversing 2209 sound barrier beam of tool, reaches and once falls beam in place, in the same industry, has simple in construction, in light weight, transport assembling side Just, function admirable, the characteristics of automaticity is high.
And with the fast development of China's high ferro, in order to meet to reduce driving noise, the injury to surrounding resident is reduced, I State's railway starts using logical bridge（2012）2209 railway prefabricated post stretching Simple T-Girders（If sound barrier）, referred to as 2209 sound barrier beams, I.e. on bridge set sound barrier with reduce driving caused by noise, reach the requirement of environmental protection.2209 sound barrier beams are due to knot Structure is simple, manufacture transport maintenance is easy to maintenance, low cost, there is obvious advantage compared with box beam, therefore, at home and abroad speed Extensive use in below 200km railway line.
Logical bridge（2012）Difference of the 2209 sound barrier beams from 2201 beams is mainly that beam body strength grade of concrete rises to C60（2201 beams are C55）, after beam installation is in place, bridge floor wants transverse stretching to connect, and part floorings pour at the scene.And it is current, 2209 sound barrier girder construction process are also immature, could be improved and perfect.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of DJ180 railway bridge erecting machines and set up the construction of 2209 sound barrier beams Method, it is possible to increase the efficiency of bridge formation, ensure construction quality and construction safety.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of DJ180 railway bridge erecting machines are set up 2209 sound barrier beam construction methods, including following process：Preparation of construction → Bridge Erector assembling → Bridge Erector packs bridge location → dress Fortune beam → Bridge Erector via → is put cross moving track → feeding beam → and set a roof beam in place → beam body transverse splicing；
It is as follows to put cross moving track process：
The putting position of cross moving track is planned in advance, confirmed according to design drawing before setting a roof beam in place；When putting cross moving track, An iron pad pier is set every 2 meters under cross moving track, during iron pad pier insufficient height, places that hardwood is levelling, Zhi Wen in its underpart； Sandbag and steel plate are got out on the outside of the 2209 sound barrier beam side bars set up, after No. two post cross moving track dropping places of Bridge Erector, Sandbag is placed on the outside of 2209 sound barrier beam side bars to embedded bar is online, lays steel plate above, makes steel plate closely connected with cross moving track, Ensure that cross moving track stress point is uniform；
Feeding beam process is as follows：
1）Beam car enters No. three post feeding beams of Bridge Erector；
2）Preceding beam car ties beam after reaching suspension centre, ear beam on the left of hanging beam overhead crane before left side side bar will be hung in the middle part of steel wire rope On, two fag ends are hung on two microtia beams on driving right side, and right side side bar is on the contrary；
3）Hanging beam overhead crane before lifting, after iron watt is laid in 2209 sound barrier beam both sides, it is lifted to a high position；
4）Beam car and preceding hanging beam overhead crane while contraposition of advancing afterwards；
5）Beam car ties beam after reaching hoisting point position afterwards, and left side side bar will be hung on ear on the left of rear hanging beam overhead crane in the middle part of steel wire rope Liang Shang, two fag ends are hung on two microtia beams on the right side of rear hanging beam overhead crane, and right side side bar is on the contrary；
6）Hanging beam overhead crane after lifting, after iron watt is laid in 2209 sound barrier beam both sides, it is lifted to a high position；
7）Beam car exits Bridge Erector position；
Process of setting a roof beam in place is as follows：
1）Two hanging beam overhead cranes advance simultaneously reaches Luo Liang positions；
2）Two hanging beam overhead cranes fall beam simultaneously, when apart from 200 meters of No.1 bridge pier and No. two bridge piers, stop falling beam；
3）Bridge Erector complete machine is traversing, and 2209 sound barrier beam transverse shiftings are in place；
4）It is in place to fall beam, accomplishes fluently support, because 2209 sound barrier beam side bar centers of gravity are different from 2201 beam side bars, 2209 sound-screens Hinder beam side bar center of gravity deviation inner side, support need to be arranged on the inside of side bar beam body；
5）Hanging beam steel wire rope and iron watt are extractd, two hanging beam overhead cranes play high-order retreat to bridge formation drive end unit；
6）Carry out down the erection circulation of a piece of beam.
Wherein, Bridge Erector via process：Before Bridge Erector via, it need to prepare on the outside of the 2209 sound barrier beam side bars set up Good sandbag and steel plate, after No. two post cross moving track dropping places of Bridge Erector, sandbag is placed on embedded bar net on the outside of 2209 beam side bars On, steel plate is laid above, makes steel plate closely connected with cross moving track, ensures that cross moving track stress point is uniform；
1）Prepare before hole：Curved beam, preceding hanging beam overhead crane, rear hanging beam overhead crane is connected into respectively with No.1 post, No. two pins for One, No.1 post, No. two posts are dropped into low level, prepare via；
2）Receive No. three posts, preceding hanging beam overhead crane, rear hanging beam overhead crane driving horn 14 meters of vertical shift forward along its length；
3）No. three posts of branch receive No. two posts, and rear hanging beam overhead crane drives No. two posts along horn 26 meters away from No.1 post of vertical shift forward；
4）2209 sound barrier beams are transported at No. two posts by beam car, and rear hanging beam overhead crane slings 2209 sound barrier beams；
5）No. two posts of branch receive No. three posts, and together 26 meters to No. zero posts of vertical shift reach No.1 bridge for horn, No. zero post, No. three posts Pier opening position；
6）Beam is returned to beam car by No. zero post of branch, No. three posts, rear hanging beam overhead crane, receives No. two posts and forward 14 meters of standards of vertical shift For in place；
7）No. two posts of branch, forward receipts No.1 post and vertical shift are in place to 40 meters of positions of setting a roof beam in place；
8）Branch No.1 post, by one, No. two post raising a to high position, by curved beam and horn pin joint, release driving and the pin of curved beam Connect, then driving is retreated to hanging beam level for hanging beam, completes via.
Wherein, Bridge Erector assembling procedure is：
1）Assemble No. two posts
No. two post cross moving tracks are installed successively, walk cross girders, column, curved beam, hydraulic unit；
2）Splicing horn for the first time
The section of installation five, four, three, two horn girder successively, and penetrate No. two post curved beams；
3）Assembling driving
Front and rear hanging beam overhead crane is penetrated into horn girder specified location successively；
4）Assemble No.1 post
No.1 post, cross moving track are installed successively, walk cross girders, column, curved beam, hydraulic unit；
5）Second of splicing horn
First segment girder is coupled through No.1 post curved beam with the second section girder, lifts Section of six girder and Section of five girder Connection；
6）Other cylinders are installed
No. zero post of lifting couples with first segment girder, and No. three posts couple with Section of six girder；
7）Other annexes are installed
Tail bracket, front and rear slip frame are installed, hanging wire, couple each portion's electrical equipment and oil circuit etc.；
8）Equipment inspection and debugging
Check that equipment is completed situation, debugging is electric, hydraulic system, and it is qualified to do hoisting test by regulation.
Wherein, Bridge Erector packs bridge location：Beam car in place after, beam car pair car and main car are respectively disposed on No. two posts Front and rear sides, secondary car are placed at the second section girder rear, and main car is reinforced well, by frame at being placed in front of Section of five girder Bridge machine is packed to end of the bridge specified location.
Wherein, beam is shipped：Beam car is installed by loading and firming schemes in beam making field and treats the sound barrier beam of frame 2209, beam body and car Iron diagonal brace being set with hardwood pad, both ends or so between body bracket and consolidating 2209 sound barrier beams, special messenger, which guards, to be transported, and travelling speed is not More than 5K/h.
Wherein, beam body laterally couples：Reinforcing bar colligation is carried out between beam body floorings, is welded, after branching standing template, carries out coagulation Native pouring construction.
It is using beneficial effect caused by above-mentioned technical proposal：The present invention is suitable for use with the erection of DJ180 Bridge Erectors The logical sound barrier Simple T-Girders of bridge 2209, it is possible to increase the efficiency of bridge formation, ensure construction quality and construction safety.
Brief description of the drawings
Fig. 1 is the construction process figure of the present invention；
Fig. 2 is the structure chart of step 1 in Bridge Erector via process in the present invention；
Fig. 3 is the structure chart of step 2 in Bridge Erector via process in the present invention；
Fig. 4 is the structure chart of step 3 in Bridge Erector via process in the present invention；
Fig. 5 is the structure chart of step 4 in Bridge Erector via process in the present invention；
Fig. 6 is the structure chart of step 5 in Bridge Erector via process in the present invention；
Fig. 7 is the structure chart of step 6 in Bridge Erector via process in the present invention；
Fig. 8 is the structure chart of step 7 in Bridge Erector via process in the present invention；
Fig. 9 is the structure chart of step 8 in Bridge Erector via process in the present invention；
Figure 10 is the structure chart of cross moving track pad in the present invention；
In figure：1st, No. three posts；2nd, No. two posts；3rd, horn；4th, No. zero post；5th, preceding hanging beam overhead crane；6th, No.1 post；7th, No. two bridges Pier；8th, rear hanging beam overhead crane；9th, No. three bridge piers；10th, 2209 sound barrier beam；11st, No.1 bridge pier；12nd, preceding beam car；13rd, sandbag； 14th, bar-mat reinforcement；15th, steel plate；16th, cross moving track.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
DJ180 erecting beam construction technological processes are：Preparation of construction → technological improvement → Bridge Erector assembling → Bridge Erector is packed Bridge location → shipment beam → Bridge Erector via → is put cross moving track → feeding beam → and set a roof beam in place → beam body transverse splicing.Each operation it is specific Work progress is as follows：
First, Bridge Erector assembles
1）Assemble No. two posts 2
No. two post cross moving tracks 16 are installed successively, walk cross girders, column, curved beam, hydraulic unit.
2）Splicing horn for the first time
The section of installation five, four, three, two horn girder successively, and penetrate No. two post curved beams.
3）Assembling driving
Forward and backward hanging beam overhead crane 8 is penetrated into the girder specified location of horn 3 successively.
4）Assemble No.1 post 6
No.1 post cross moving track is installed successively, walks cross girders, column, curved beam, hydraulic unit.
5）Second of splicing horn
First segment girder is coupled through No.1 post curved beam with the second section girder, lifts Section of six girder and Section of five girder Connection.
6）Other cylinders are installed
No. zero post 4 of lifting couples with first segment girder, and No. three posts couple with Section of six girder.
7）Other annexes are installed
Tail bracket, front and rear slip frame are installed, hanging wire, couple each portion's electrical equipment and oil circuit etc..
8）Equipment inspection and debugging
Check that equipment is completed situation, debugging is electric, hydraulic system, and it is qualified to do hoisting test by regulation.
2nd, Bridge Erector packs bridge location
Beam car in place after, beam car pair car and main car are respectively disposed on No. two front and rear sides of post 2, secondary car is placed in the At two section girder rears, main car is reinforced well at being placed in front of Section of five girder, Bridge Erector is packed to end of the bridge specified location Place.
3rd, beam is shipped
Beam transportation vehicle is installed by loading and firming schemes in beam making field and treats the sound barrier beam 10 of 2209 sound barrier beam of frame 10,2209 Iron diagonal brace is set with hardwood pad, both ends or so consolidate 2209 sound barrier beams, Zhuan Renjian between beam body and beam transportation vehicle car body bracket Ship sth. under guard and send, travelling speed is no more than 5K/h.
4th, Bridge Erector via
Before Bridge Erector via, sandbag and steel plate such as Figure 10 institutes need to be got out on the outside of the 2209 sound barrier beam side bars set up Show, after Bridge Erector after No. two post cross moving track dropping places, sandbag is placed on embedded bar net 14 on the outside of 2209 sound barrier beam side bars On, steel plate 15 is laid above, makes steel plate 15 and cross moving track 16 closely connected, ensures that cross moving track stress point is uniform.
1）Prepare before hole：Shown in Figure 2, driving makes curved beam, hanging beam row with 6, No. two pin joints of post 2 of No.1 post respectively Car is connected into and is integrated with No.1 post, No. two pins respectively, and one, No. two post is dropped into low level, prepares via.
2）No. three posts 1 are received, one, No. two driving drives horn vertical shift 14, as shown in Figure 3.
3）No. three posts 1 of branch receive No. two posts 2, and rear hanging beam overhead crane 8 drives 26 meters away from No.1 post of No. two vertical shifts of post 2, such as Fig. 4 institutes Show.
4）2209 sound barrier beams are transported at No. two posts 2 by beam car, and rear hanging beam overhead crane 8 slings beam, as shown in Figure 5.
5）No. two posts 2 of branch receive No. three posts 1, and together 26 meters to No. zero posts 4 of vertical shift reach the post 4, three of horn 3, zero post 1 The opening position of No.1 pier 11, as shown in Figure 6.
6）Beam is returned to beam car by branch 4, No. three posts 1 of No. zero post, rear hanging beam overhead crane 8, receives No. two posts 2 and forward vertical shift 14 Rice prepares in place, as shown in Figure 7.
7）No. two posts 2 of branch, receipts No.1 post 6 and forward 40 meters of vertical shift are in place to position of setting a roof beam in place, as shown in Figure 8.
8）Branch No.1 post 6, by one, No. two post raising a to high position, by curved beam and horn pin joint, release hanging beam overhead crane and curved beam Pin joint, then hanging beam overhead crane retreat to hanging beam level for hanging beam, as shown in Figure 9.
5th, cross moving track is put
The putting position of cross moving track is planned in advance, confirmed according to design drawing before setting a roof beam in place.Cross moving track when putting Avoid at jointing vacantly, under track when 2 one iron pad pier of setting, iron pad pier insufficient height, placed in its underpart hard Weedtree is levelling, Zhi Wen, ensures travelling wheel on same root cross moving track when setting up side bar outside left and right.As shown in Figure 10, in frame If 2209 sound barrier beam side bars on the outside of get out sandbag and steel plate, after No. two post cross moving track dropping places of Bridge Erector, by sandbag It is placed on the outside of 2209 sound barrier beam side bars that embedded bar is online, lays steel plate above, make steel plate closely connected with cross moving track, ensures horizontal It is uniform to move track stress point.
6th, feeding beam
1）Beam transportation vehicle enters No. three feeding beams of post 1 of Bridge Erector.
2）Preceding beam car 12 ties beam after reaching suspension centre, is hung before being hung in the middle part of the steel wire rope of side bar on the left of 2209 sound barrier beams Beam is driven a vehicle on 5 left side ear beams, before two fag ends are hung on two microtia beams on the right side of hanging beam overhead crane 5（Right side side bar is on the contrary）.
3）Hanging beam overhead crane 5 before lifting, after iron watt is laid in 2209 sound barrier beam both sides, it is lifted to a high position.
4）Beam car and preceding hanging beam overhead crane 12 while contraposition of advancing afterwards.
5）Beam car ties beam after reaching hoisting point position afterwards, after being hung in the middle part of the steel wire rope of side bar on the left of 2209 sound barrier beams On the left side ear beam of hanging beam overhead crane 8, two fag ends are hung on two microtia beams on the rear right side of hanging beam overhead crane 8（Right side side bar is on the contrary）.
6）Hanging beam overhead crane 8 after lifting, after iron watt is laid in 2209 sound barrier beam both sides, it is lifted to a high position.
7）Beam car exits Bridge Erector position.
7th, set a roof beam in place
1）Two hanging beam overhead cranes advance simultaneously reaches Luo Liang positions.
2）Two hanging beam overhead cranes fall beam simultaneously, when apart from 200 meters of No.1 pier, stop falling beam.
3）Bridge Erector complete machine machinery is traversing, and 2209 sound barrier beams are traversing in place.
4）It is in place to fall beam, accomplishes fluently support.Because 2209 sound barrier beam side bar centers of gravity are different from 2201 beam side bars, support need to be set Put on the inside of side bar beam body.
5）Hanging beam steel wire rope and iron watt are extractd, two hanging beam overhead cranes play high-order retreat to bridge drive end unit.
6）Carry out down the erection circulation of a piece of beam.
8th, beam body laterally couples
Reinforcing bar colligation is carried out between beam body floorings, is welded, after branching standing template, carries out filling concrete construction.
The key points for operation of the present invention are as follows：
First, technique process is perfect
1st, No. two post cross moving track pads during via
As shown in Figure 10, need to get out sandbag and steel plate on the outside of the 2209 sound barrier beam side bars set up, treat Bridge Erector two After number post cross moving track dropping place, sandbag is placed on the outside of 2209 sound barrier beam side bars to embedded bar is online, lays steel plate above, makes Steel plate is closely connected with cross moving track, ensures that cross moving track stress point is uniform.
2nd, beam rear steady beam support in place is fallen
2209 sound barrier beam side bar centers of gravity deviation inner side, therefore need to be supported after beam dropping place in inner side.
2nd, construction investigation
1st, understand project profile, construction period, route curve, the gradient, engineering quantity, understand bridge pier, the basic chi of abutment Very little, the longitudinally, laterally gradient, whether there is special abutment, bridge pier.Understand the basic size and weight of beam, determine 2209 sound barrier beams Erection order, method of supplying and loading and firming schemes；
2nd, the assembling place to Bridge Erector, Bridge Erector approach course are investigated, and the transport routes of beam car are adjusted Look into.（Including transportation route, the gradient of road, road quality, whether there is limit for height）Also needed when from beam factory bale handle or needing to change the outfit Investigate the assembling place and the vertical position of branch of straddle truck；
3rd, before equipment is marched into the arena, Bridge Erector appearance and size is understood, to the power line of construction site, viaduct, tunnel, electrification Contact net etc. influences the current headroom of equipment and safe distance is investigated；
4th, situations such as whether the sound barrier beam of institute's frame 2209 needs crossing highway, railway understood；
5th, the condition of construction of Bridgehead by Blastig is understood（Mainly for Abutment Subgrade Compaction）, bridge pier, the scene of abutment are applied Work situation, including casting concrete time, whether concrete strength reaches design requirement before construction；
6th, the water power situation of job location is investigated.
3rd, preparation of construction
1st, technique preparation
1）Work out erecting beam construction scheme；
2）Put forward the relevant material supply plan of report（Including material requested of setting a roof beam in place, instrument, equipment and spare part etc.）；
3）Data that establishment erecting beam construction is confided a technological secret and safety is told somebody what one's real intentions are；
4）Treat bridge center line and carry out repetition measurement, measure the various graticules required for operation of setting a roof beam in place（Refer mainly to beam-ends line, Bearing cross hairs, absolute altitude control line etc.）；
5）Check model, length, span and the height of beam；
6）Bridge Erector pacifies the determination for tearing place open.
2nd, equipment prepares
1）The transport of setting up girder；
2）The maintenance of setting up girder；
3）Special equipment installation is handled by national regulation and informs book, and contact units concerned carry out the supervision inspection of special equipment Test, handle special equipment inspection certificate；
4）The calculating and preparation of supporting suspender, steel wire rope；
5）The source of mass needed for DJ180 Bridge Erector vias.
3rd, goods and materials prepare
1）Including other goods and materials to being needed during erecting beam construction such as sleeper, electric welding machine, welding rod, diesel oil, setting a roof beam in place sets Standby spare part etc. is ready work；
2）Emergency article and equipment prepare；
3）Goods and materials under the conditions of winter, rainy season etc. prepare.
4 other preparations
1）The pre-job training of personnel；
2）Security protection articles for use（Including safety cap, safety belt, warning line etc.）；
3）The Sign Boards such as site safety warning；
4）Fire-fighting equipment.
4th, beam body loading and firming schemes
1st, stowage
1）Use tractor（25t）Add rear steering chassis（7t), two car straddle mountings are born a heavy burden；
2）Using freight turning rack, longitudinally length 2800, laterally wide 1400, straddle mounting offset distance are 35200, both ends each 2400；
3）Goods along dress, the projection of its total centre of gravity positioned at middle tourist bus vehicle in length and breadth the crosspoint on center line to beam flank 80；
4）The chock of cushioning 2800 × 1400 × 300 between the bottom of goods and bogie body；
2nd, reinforcement means
1）Tractor freight turning rack lower frame is fixed with car floor bearing pin with nut；
2）Per car selects diameter 24, steel wire rope 2 pay, be equipped with 5t jacks 2, cornerite 4, steel wire rope is encircled and hunted down, and is used simultaneously 2 5t guide chains seal 2209 sound barrier beams, 2209 sound barrier beams is fastened as a whole with front and rear beam car rotating disk；
3）The high road surface of goods center of gravity for car loaded is risen, and more than 2000, needs limiting operation；
4）Dragline rope uses Precautionary Measure with goods and vehicle corner angle contact position；
5）Examination of cargo portable cord is drawn using white or red paint mark.
3rd, calculation specification is reinforced
1）Center of gravity for car loaded is high
Center of gravity of goods is high after entrucking
H=1200+2000+300=3500
H=2280
The goods gravity center height of wagon loaded is more than 2000.
2）The various force value of goods are acted in transportation
（1）It is used to power longitudinal direction
T=t0Q (KN)=9.46 × 168=1588.5KN
（2）Lateral inertia forces
N=n0Q (KN)=3.24 × 168=544.4KN
（3）Vertical inertia force
Q hangs down=1.44 × 168=241.2K.
Main research DJ180 Bridge Erectors of the invention are set up（2012）The construction method of 2209 sound barrier Simple T-Girders.Logical bridge （2012）2209 sound barrier beams be widely used in nine scape thoroughfare railways, the western loop wire in Hainan, Chengdu-Kunming Railway Line, into blue line, Chengdu hinge, again The important trunk railways such as hinge, Kweiyang hinge are celebrated, newly-built nine scapes thoroughfare railway is more by cities and towns, rural area on the way, shares 350 holes 2209 sound barrier beams.The present invention sets up 2209 sound barrier beam engineering practices summary according to certain railway and formed.
The present invention to set up 2209 sound barrier beams construction technology optimize it is perfect, ensure that set up 2209 sound barrier beams Efficiency and safety, it is suitable for use with DJ180 Bridge Erectors and sets up logical bridge（2012）2209 sound barrier Simple T-Girders.
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| CN103422441A (en) * | 2013-08-13 | 2013-12-04 | 中铁六局集团有限公司 | Perforating method for erecting long-span highway box girders by using DJ180 bridge erecting machine |
| CN203878476U (en) * | 2014-04-21 | 2014-10-15 | 中铁六局集团有限公司 | Tracklayer reconstructed by DJ180 bridge girder erection machine |
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| CN103422441A (en) * | 2013-08-13 | 2013-12-04 | 中铁六局集团有限公司 | Perforating method for erecting long-span highway box girders by using DJ180 bridge erecting machine |
| CN203878476U (en) * | 2014-04-21 | 2014-10-15 | 中铁六局集团有限公司 | Tracklayer reconstructed by DJ180 bridge girder erection machine |
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Inventor after: Yuan Zhifu Inventor after: Wang Jun Inventor after: Hu Zhengyong Inventor after: Wang Yong Inventor after: Li Feng Inventor after: Chen Lizhen Inventor after: Mao Jiaxu Inventor after: Qin Peng Inventor before: Hu Zhengyong Inventor before: Wei Bingzheng Inventor before: Li Feng Inventor before: Yan Yuhong Inventor before: Wang Yong Inventor before: Xiao Chong Inventor before: Di Zhenxu Inventor before: Li Zhe Inventor before: Liu Yongxin Inventor before: Wang Siyang |
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Effective date of registration: 20180515 Address after: 102300 Wanshou Road, Haidian District, Beijing, No. 2 Co-patentee after: Central Iron and six Bureau Group Feng Qiao Bridge Co., Ltd. Patentee after: The Sixth Engineering Bureau Group Co., Ltd., China Railway Address before: 100036 Beijing Haidian District West Road 2, China Railway six Bureau Building Patentee before: The Sixth Engineering Bureau Group Co., Ltd., China Railway |