CN210482000U - Limiting device for jacking construction of long-span CFST-tie arch bridges - Google Patents
Limiting device for jacking construction of long-span CFST-tie arch bridges Download PDFInfo
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- CN210482000U CN210482000U CN201921281751.XU CN201921281751U CN210482000U CN 210482000 U CN210482000 U CN 210482000U CN 201921281751 U CN201921281751 U CN 201921281751U CN 210482000 U CN210482000 U CN 210482000U
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Abstract
The utility model discloses a stop device is used in long-span steel pipe concrete tied arch bridge jacking construction, including the arch bridge stop device that two symmetries were laid about, the jacking bridge superstructure includes two arch bridge superstructure, every arch bridge superstructure all includes two arch bridge integrated configuration, all is provided with an arch bridge stop device on every arch bridge superstructure, every arch bridge stop device all includes two arch bridge stop gear, every arch bridge stop gear all includes the spacing post that two symmetries were laid about and the limit stop that two symmetries were laid about with, spacing post is the steel stand. The utility model has the advantages of simple structure and reasonable design and processing are simple and convenient, excellent in use effect, adopt steel stand and limit stop to match and merge the position to steel stand and limit stop, realize in the horizontal bridge to upwards carrying out accurate spacing purpose to bridge superstructure with the longitudinal bridge, the steel stand processing of adoption is simple and convenient and on-the-spot installation and demolish convenience, quick, can effectively shorten construction period.
Description
Technical Field
The utility model belongs to the technical field of the bridge jacking construction, especially, relate to a stop device is used in long-span steel pipe concrete tied arch bridge jacking construction.
Background
The bridge jacking construction (also called as bridge jacking technology) is characterized by that it adopts the integral hydraulic synchronous lifting scheme, i.e. utilizes the original cast-in-place pile to bear load, and does not damage the connection between original bridge deck pavement layer, handrail, sidewalk and beam slab, and firstly uses the hydraulic jacking device to integrally jack upper portion structure of bridge, then cuts off the upright columns under the piers and table cap beams, then operates the hydraulic jacking device to make the whole bridge be lifted to designed height, and finally uses the long upright column steel bars to vertically mould and pour second-stage concrete. The bridge superstructure refers to a general term of a part spanning a bridge opening above a bridge support (above a non-hinged arch camber line or a frame main beam bottom line). In recent years, with the need of economic development and the improvement of bridge jacking technology, more and more bridge jacking technology is applied to bridge modification engineering. The bridge jacking technology is a technology for jacking a bridge deck to an expected height through a hydraulic jacking system, is widely applied in domestic bridge reconstruction and support replacement, and has certain research and engineering application in hydraulic synchronous jacking of bridges. However, at present, no design, construction and detection specifications for bridge jacking translation transformation exist in China, so that the application of the advanced technology performance of bridge jacking and translation transformation is limited to a certain degree, and most of the existing jacking projects are simple support structures and continuous beams. The technology for large-tonnage integral synchronous jacking of the large-span steel pipe concrete tied arch bridge across the canal has no precedent in China.
The large-span bridge is also called a large-span bridge or a large-span bridge, and the large-span bridge refers to a bridge with a porous span total length of more than or equal to 100 meters or a single-pore span of more than or equal to 40 meters. The bridge span is also called bridge span, generally refers to the total span of the bridge, and the total span refers to the sum of net spans of all holes in the porous bridge. The total length of the porous span refers to the total length of the bridge, namely the total length of the bridge girder. When the large-span steel pipe concrete tied arch bridge across the canal is subjected to jacking construction, the construction difficulty is very high, and the potential safety hazards are high. If the south-north trend of the extra-large bridge located at the cross of the Liyang section of the NingHang high-speed highway and the Tsucheng line canal is adopted, the bridge is built into a traffic vehicle in 2003 and is used as a part of an expressway, the building time is short, and the use condition is good. But at the present stage, according to the requirements of channel regulation planning, the current navigation scale of the grand bridge of the south river does not meet the requirement of the three-level channel navigation clear scale after regulation. The highway at the bridge position section is positioned on a circular curve with the radius of 8500m, the designed speed of the highway is 120km/h, and six lanes are arranged in two directions. The longitudinal slope of the north approach bridge is 1.570 percent of the upward slope, the longitudinal slope of the south approach bridge is 1.570 percent of the downward slope, the radius of a vertical curve at the bridge is 20000m, the road and bridge boundary filling height is about 6.5m, the bridge span is arranged to be a 10 multiplied by 25m combined box girder, a 130m steel pipe concrete tie bar arch, a 4 multiplied by 25m combined box girder and (2 multiplied by 20+18+14) cast-in-place continuous box girder and a 4 multiplied by 25m combined box girder, and the combined box girder is of a structure which is simply supported and then continuous. The total length of the bridge is 659.44m, the transverse double width arrangement is adopted, the full width of the bridge deck is 15.75m (single width) +4.5m (median strip) +15.75m (single width): 36m, and the single bridge is transversely arranged: the number of the bridge approach spans is large, and the bridge design level is high, the main bridge span is large, and the bridge approach span is large because 0.5m (guardrail) +15.25m (motor way) +1m (guardrail) is 16.75 m. The water surface width at the bridge position is 60m, and the traffic clear height is 5 m. The arch rib of the south river grand bridge adopts a dumbbell type steel pipe concrete structure, and the cross beam and the tie beam are both in a prestressed concrete structure. The main bridge of the south river grand bridge is a steel pipe concrete tied arch bridge (also called steel pipe concrete tied arch bridge) with the length of 130m, and the approach bridge is of a prestressed combined box girder and cast-in-place concrete box girder structure, so that the approach bridge is a concrete box girder. The clear width of the great bridge of the south river is 60m, and the clear width of a three-level channel is met; but the net height is 5m, which can not meet the requirement of three-level channel, and needs to be adjusted to 7 m. Therefore, the old bridge needs to be lifted, the old bridge is jacked and transformed, and the lifting height of the transformed bridge is 2.161 m. Because the whole jacking of bridge is raised, in order to reduce abutment fill height and coordinate with the periphery, the approach bridges on both sides need to be correspondingly prolonged, this north approach bridge increases the combination box girder that 4 holes span is 25 meters, south approach bridge increases the combination box girder that 6 holes span is 25 meters, owing to increase the bridge span, the abutment needs to be reformed transform into the pier.
Through careful comparison and selection in the aspects of safety and technology, when the south river grand bridge is jacked, a main bridge and two approach bridges of the south river grand bridge are jacked respectively. When jacking the main bridge, main bridge jacking weight is huge, and single jacking weight is 7000 tons to among the jacking process, bridge superstructure is in the suspended state, has very big potential safety hazard, must take effective measures to solve above risk, ensures bridge and constructor's safety.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, a long-span steel pipe concrete tie rod arch bridge jacking stop device for construction is provided, its simple structure, reasonable in design and processing are simple and convenient, excellent in use effect, adopt steel stand and limit stop to match the position of merging to steel stand and limit stop, the realization is to upwards carrying out accurate spacing purpose to bridge superstructure with the longitudinal bridge in the cross bridge, the steel stand processing of adopting simultaneously is simple and convenient and on-the-spot installation and demolish the convenience, it is quick, construction period can effectively be shortened.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a stop device is used in construction of jacking of long span steel pipe concrete tied arch bridge which characterized in that: the device comprises two arch bridge limiting devices which are symmetrically arranged at the left and the right and limit the upper structure of the lifted bridge;
the upper structure of the jacking bridge is the upper structure of a large-span steel pipe concrete tied arch bridge, and the large-span steel pipe concrete tied arch bridge comprises the upper structure of the jacking bridge and a lower bridge supporting structure for supporting the upper structure of the jacking bridge; the jacking bridge upper structure comprises a left arch bridge upper structure and a right arch bridge upper structure which are symmetrically arranged, and the two arch bridge upper structures are vertically arranged and are arranged along the longitudinal bridge direction;
each arch bridge upper structure comprises two arch bridge combined structures which are symmetrically arranged on the left and right and a plurality of cross beams which are connected between the two arch bridge combined structures from front to back, the cross beams are horizontally arranged and are arranged along the transverse bridge direction, and the cross beams are positioned on the same horizontal plane; the cross beam positioned at the foremost side in the plurality of cross beams is a front end cross beam, and the cross beam positioned at the rearmost side in the plurality of cross beams is a rear end cross beam; each arch bridge combined structure is a steel pipe concrete tied arch and comprises a main beam which is horizontally arranged and an arch rib which is erected right above the main beam and is vertically arranged, the arch rib is a steel pipe concrete arch rib, and the main beam and the cross beam are reinforced concrete beams; two main beams in the upper structure of each arch bridge are fixedly connected into a whole through a plurality of cross beams to form an assembled beam body;
the bridge lower supporting structure comprises two supporting piers which respectively support the front end and the rear end of the upper structure of the jacked bridge, the two supporting piers are symmetrically arranged and respectively supported below the front end and the rear end of the upper structure of the jacked bridge; each supporting pier comprises a pier foundation, a plurality of vertical piers uniformly distributed on the pier foundation and a horizontal capping beam supported on the vertical piers, and the pier foundation, the vertical piers and the horizontal capping beam are all of reinforced concrete structures; the two horizontal cover beams in the bridge lower supporting structure are respectively a front end cover beam supported below the front end of the upper structure of the lifted bridge and a rear end cover beam supported below the rear end of the upper structure of the lifted bridge;
each arch bridge upper structure is provided with one arch bridge limiting device, each arch bridge limiting device comprises two arch bridge limiting mechanisms respectively arranged at the front side and the rear side of the limited arch bridge upper structure, and the two arch bridge limiting mechanisms are symmetrically arranged;
each arch bridge limiting mechanism comprises a left limiting column and a right limiting column which are symmetrically arranged and a left limiting stop and a right limiting stop which are symmetrically arranged, the limiting stops are reinforced concrete stops, and the limiting columns are arranged vertically; the two limit stops are arranged on the same cross section of the upper structure of the lifted bridge, the two limit columns are arranged on the same cross section of the upper structure of the lifted bridge, and the two limit stops are both positioned between the two limit columns; the two limit stops are respectively a left limit stop and a right limit stop positioned on the right side of the left limit stop, the two limit columns are respectively a left limit column and a right limit column positioned on the right side of the left limit column, the left limit stop is abutted against the left limit column, and the right limit stop is abutted against the right limit column; the limiting column is a steel upright column which is vertically arranged and formed by splicing a plurality of straight rod pieces;
two arch bridge limiting mechanisms in each arch bridge limiting device are respectively a front side limiting mechanism positioned on the front side of an upper structure of the limited arch bridge and a rear side limiting mechanism positioned on the rear side of the upper structure of the limited arch bridge, a limiting column in the front side limiting mechanism is a front side limiting column fixed on the front end cover beam, a limiting column in the rear side limiting mechanism is a rear side limiting column fixed on the rear end cover beam, and each arch bridge upper structure is clamped between the two front side limiting columns and the two rear side limiting columns;
two limit stops and two limit columns in the front side limit mechanism are positioned on the front side of the front end beam of the upper structure of the limited arch bridge, and the two limit stops in the front side limit mechanism are fixed on the front end beam of the upper structure of the limited arch bridge; two of the rear side limiting mechanisms and two of the limiting columns are located on the rear side of the rear end cross beam of the limiting arch bridge upper structure, and the two of the rear side limiting mechanisms are fixed on the front end cross beam of the limiting arch bridge upper structure.
The limiting device for the jacking construction of the large-span steel pipe concrete tied arch bridge is characterized in that: the front side limiting column abuts against the front end cross beam located on the rear side thereof, and the rear side limiting column abuts against the rear end cross beam located on the front side thereof.
The limiting device for the jacking construction of the large-span steel pipe concrete tied arch bridge is characterized in that: the limit stop is a cubic stop which is horizontally arranged.
The limiting device for the jacking construction of the large-span steel pipe concrete tied arch bridge is characterized in that: the limit stop in the front limit mechanism is a front stop, and the limit stop in the rear limit mechanism is a rear stop; the front stop block is fixed on the fixed front end cross beam through the embedded bars and integrally poured with the fixed front end cross beam, and the rear stop block is fixed on the fixed front end cross beam through the embedded bars and integrally poured with the fixed front end cross beam.
The limiting device for the jacking construction of the large-span steel pipe concrete tied arch bridge is characterized in that: the bottom of the steel upright post is fixed on the horizontal bent cap through a plurality of anchor bolts.
The limiting device for the jacking construction of the large-span steel pipe concrete tied arch bridge is characterized in that: the straight rod piece is a straight steel pipe.
The limiting device for the jacking construction of the large-span steel pipe concrete tied arch bridge is characterized in that: the steel upright posts are cuboid upright posts;
the cuboid stand includes that four are vertical to the vertical support steel pipe of laying, adjacent two the vertical support steel pipe is as an organic whole through many by supreme connection steel pipe fastening connection of laying on same vertical face down, carry out fixed connection with the welding mode between connection steel pipe and the vertical support steel pipe.
The limiting device for the jacking construction of the large-span steel pipe concrete tied arch bridge is characterized in that: two limit stops in the front side limit mechanism are symmetrically arranged on the left side and the right side of the middle of the fixed front end cross beam.
The limiting device for the jacking construction of the large-span steel pipe concrete tied arch bridge is characterized in that: the horizontal distance between two limit stops in each arch bridge limit mechanism is
Wherein L is the transverse bridge width of the assembled beam body.
Compared with the prior art, the utility model has the following advantage:
1. simple structure, reasonable in design and input cost are lower.
2. The steel upright post has reasonable structural design, simple and convenient processing, flexible processing mode and easy guarantee of processing quality, and the adopted straight rod piece is processed in a processing factory in advance and only needs to be spliced on site; the steel upright columns can be assembled in advance, and only installation is needed on site.
3. Good and practical value of result of use is high, adopts steel stand and limit stop to match and merge to steel stand and limit stop's position and prescribe a limit to, realizes upwards carrying out accurate spacing purpose to bridge superstructure in horizontal bridge to and vertical bridge, and the steel stand processing of while adoption is simple and convenient and on-the-spot installation and demolish convenience, quick, can effectively shorten construction period. The on-spot dismouting of steel stand is simple and convenient, only need through a plurality of crab-bolts be fixed in on the bent cap can, the engineering time that exists when having changed the tradition and adopting reinforced concrete limit structure is long, the difficult problem that the work progress is complicated, the construction processes who carries out the bar planting on the bent cap, the formwork and concreting have been reduced, and strong time such as reinforced concrete limit post maintenance has been reduced, the construction period has been shortened successfully, simultaneously after the jacking construction end to spacing post wholly demolish can, demolish the convenience, the process that traditional reinforced concrete limit structure chiseled has been reduced. After the jacking construction is finished, the limit stop block does not need to be detached.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic diagram of the transverse bridge layout position of the present invention.
Fig. 2 is a schematic view of the plane layout position of the present invention.
Fig. 3 is the schematic diagram of the longitudinal bridge layout position of the present invention.
Description of reference numerals:
1-arch bridge superstructure; 2-main beam; 3-arch rib;
4, a cross beam; 5, supporting a pier; 5-1-vertical pier stud;
5-2-horizontal bent cap; 6, a limiting column; 6-1-vertical supporting steel pipes;
6-2-connecting steel pipes; 7-limit stop;
Detailed Description
As shown in fig. 1, 2 and 3, the utility model comprises two arch bridge limiting devices which are symmetrically arranged at the left and right sides and limit the upper structure of the lifted bridge;
the upper structure of the jacking bridge is the upper structure of a large-span steel pipe concrete tied arch bridge, and the large-span steel pipe concrete tied arch bridge comprises the upper structure of the jacking bridge and a lower bridge supporting structure for supporting the upper structure of the jacking bridge; the jacking bridge superstructure comprises a left arch bridge superstructure 1 and a right arch bridge superstructure 1 which are symmetrically arranged, and the two arch bridge superstructures 1 are vertically arranged and are arranged along the longitudinal bridge direction;
each arch bridge upper structure 1 comprises two arch bridge combined structures which are symmetrically arranged on the left and right and a plurality of cross beams 4 which are connected between the two arch bridge combined structures from front to back, the cross beams 4 are horizontally arranged and are arranged along the transverse bridge direction, and the cross beams 4 are positioned on the same horizontal plane; the cross beam 4 positioned at the foremost side among the plurality of cross beams 4 is a front end cross beam, and the cross beam 4 positioned at the rearmost side among the plurality of cross beams 4 is a rear end cross beam; each arch bridge combined structure is a steel pipe concrete tied arch and comprises a main beam 2 which is horizontally arranged and an arch rib 3 which is erected right above the main beam 2 and is vertically arranged, the arch rib 3 is a steel pipe concrete arch rib, and the main beam 2 and the cross beam 4 are reinforced concrete beams; two main beams 2 in each arch bridge upper structure 1 are fixedly connected into a whole through a plurality of cross beams 4 to form an assembled beam body;
the bridge lower supporting structure comprises two supporting piers 5 which respectively support the front end and the rear end of the upper structure of the jacked bridge, the two supporting piers 5 are symmetrically arranged and respectively supported below the front end and the rear end of the upper structure of the jacked bridge; each support pier 5 comprises a pier foundation, a plurality of vertical piers 5-1 uniformly distributed on the pier foundation and a horizontal capping beam 5-2 supported on the vertical piers 5-1, and the pier foundation, the vertical piers 5-1 and the horizontal capping beam 5-2 are all of reinforced concrete structures; the two horizontal cover beams 5-2 in the bridge lower supporting structure are respectively a front end cover beam supported below the front end of the upper structure of the lifted bridge and a rear end cover beam supported below the rear end of the upper structure of the lifted bridge;
each arch bridge upper structure 1 is provided with one arch bridge limiting device, each arch bridge limiting device comprises two arch bridge limiting mechanisms respectively arranged at the front side and the rear side of the limited arch bridge upper structure 1, and the two arch bridge limiting mechanisms are symmetrically arranged;
each arch bridge limiting mechanism comprises a left limiting column 6 and a right limiting column 6 which are symmetrically arranged and a left limiting stop 7 and a right limiting stop 7 which are symmetrically arranged, the limiting stops 7 are reinforced concrete stops, and the limiting columns 6 are arranged vertically; the two limit stops 7 are arranged on the same cross section of the upper structure of the lifted bridge, the two limit columns 6 are arranged on the same cross section of the upper structure of the lifted bridge, and the two limit stops 7 are both positioned between the two limit columns 6; the two limit stops 7 are respectively a left limit stop and a right limit stop positioned on the right side of the left limit stop, the two limit columns 6 are respectively a left limit column and a right limit column positioned on the right side of the left limit column, the left limit stop is abutted against the left limit column, and the right limit stop is abutted against the right limit column; the limiting column 6 is a steel upright column which is vertically arranged and formed by splicing a plurality of straight rod pieces;
two arch bridge limiting mechanisms in each arch bridge limiting device are respectively a front side limiting mechanism positioned on the front side of the limited arch bridge upper structure 1 and a rear side limiting mechanism positioned on the rear side of the limited arch bridge upper structure 1, a limiting column 6 in the front side limiting mechanism is a front side limiting column fixed on the front end cover beam, a limiting column 6 in the rear side limiting mechanism is a rear side limiting column fixed on the rear end cover beam, and each arch bridge upper structure 1 is clamped between the two front side limiting columns and the two rear side limiting columns;
two limit stops 7 and two limit columns 6 in the front side limit mechanism are positioned on the front side of the front end beam of the limit arch bridge upper structure 1, and the two limit stops 7 in the front side limit mechanism are fixed on the front end beam of the limit arch bridge upper structure 1; two of the rear side limiting mechanisms, the limiting stop blocks 7 and two of the limiting columns 6 are located on the rear side of the rear end beam of the limiting arch bridge upper structure 1, and the two of the rear side limiting mechanisms, the limiting stop blocks 7 are fixed on the front end beam of the limiting arch bridge upper structure 1.
In this embodiment, the limit stop 7 in the front limit mechanism is a front stop, and the limit stop 7 in the rear limit mechanism is a rear stop; the front stop block is fixed on the fixed front end cross beam through the embedded steel bars and integrally poured with the fixed front end cross beam, the rear stop block is fixed on the fixed front end cross beam through the embedded steel bars and integrally poured with the fixed front end cross beam, and the limit stop block 7 is simple and convenient to construct and is firm in fixation.
In order to ensure reliable limiting, the front limiting column abuts against the front end cross beam on the rear side, and the rear limiting column abuts against the rear end cross beam on the front side.
In this embodiment, the limit stop 7 is a horizontally arranged cubic stop. The actual formwork is simple and convenient, the site construction is convenient, and the labor and the time are saved.
In addition, when the limit stop 7 is constructed, the upper structure of the lifted bridge does not need to be changed, and any adverse effect on the upper structure of the lifted bridge cannot be caused. Meanwhile, after the jacking construction is completed, the limit stop 7 does not need to be dismantled, so that labor and time are saved, the construction period is further shortened, and the construction efficiency is improved.
In this embodiment, the bottom of the steel upright is fixed to the horizontal bent cap 5-2 by a plurality of anchor bolts.
The actual fixation is simple and firm, the later-stage disassembly is simple and convenient, and the steel upright post can be integrally disassembled.
In this embodiment, the straight rod is a straight steel pipe. In practical use, the straight rod piece can be a solid steel rod.
In this embodiment, the steel column is a rectangular solid column;
the cuboid stand column comprises four vertical supporting steel pipes 6-1 which are vertically arranged, every two adjacent vertical supporting steel pipes 6-1 are fixedly connected into a whole through a plurality of connecting steel pipes 6-2 which are arranged on the same vertical surface from bottom to top, and the connecting steel pipes 6-2 and the vertical supporting steel pipes 6-1 are fixedly connected in a welding mode. The cuboid stand column is simple and convenient to machine on site, stable in overall structure and capable of abutting against the limit stop 7, so that the limit effect of the limit stop 7 and the limit column 6 after matching is better.
In this embodiment, two of the limit stoppers 7 in the front-side limit mechanism are symmetrically arranged on the left and right sides of the middle portion of the fixed front-end beam.
In this embodiment, the horizontal distance between two limit stops 7 in each arch bridge limiting mechanism is
Wherein L is the transverse bridge width of the assembled beam body.
In actual use, the horizontal distance between the two limit stops 7 in each arch bridge limiting mechanism can be correspondingly adjusted according to specific requirements.
Before jacking actually, the left arch bridge limiting device and the right arch bridge limiting device are constructed, and one arch bridge limiting device is uniformly distributed on each arch bridge upper structure 1. And after jacking in place, integrally removing the cuboid stand column.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921281751.XU CN210482000U (en) | 2019-08-08 | 2019-08-08 | Limiting device for jacking construction of long-span CFST-tie arch bridges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921281751.XU CN210482000U (en) | 2019-08-08 | 2019-08-08 | Limiting device for jacking construction of long-span CFST-tie arch bridges |
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| CN210482000U true CN210482000U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921281751.XU Active CN210482000U (en) | 2019-08-08 | 2019-08-08 | Limiting device for jacking construction of long-span CFST-tie arch bridges |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250722A (en) * | 2022-01-05 | 2022-03-29 | 黄河勘测规划设计研究院有限公司 | Jacking device of existing continuous rigid frame bridge |
-
2019
- 2019-08-08 CN CN201921281751.XU patent/CN210482000U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250722A (en) * | 2022-01-05 | 2022-03-29 | 黄河勘测规划设计研究院有限公司 | Jacking device of existing continuous rigid frame bridge |
| CN114250722B (en) * | 2022-01-05 | 2023-11-14 | 黄河勘测规划设计研究院有限公司 | Jacking device of existing continuous rigid frame bridge |
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Address after: 215151 No. 10, Datong Road, high tech Zone, Suzhou, Jiangsu Patentee after: China Railway Construction Urban Construction Transportation Development Co.,Ltd. Country or region after: China Address before: Engineering technology management center of the first Engineering Co., Ltd. of China Railway 20th bureau group, No.10 Datong Road, high tech Zone, Suzhou City, Jiangsu Province Patentee before: NO.1 ENGINEERING CORPORATION LIMITED OF CR20G Country or region before: China |