CN103898842A - Blasting demolition method of reinforced concrete arch bridge - Google Patents
Blasting demolition method of reinforced concrete arch bridge Download PDFInfo
- Publication number
- CN103898842A CN103898842A CN201210585935.1A CN201210585935A CN103898842A CN 103898842 A CN103898842 A CN 103898842A CN 201210585935 A CN201210585935 A CN 201210585935A CN 103898842 A CN103898842 A CN 103898842A
- Authority
- CN
- China
- Prior art keywords
- arch
- bridge
- reinforced concrete
- springing
- big gun
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a blasting demolition method of a reinforced concrete arch bridge. The method includes: setting a plurality of blast holes at the arch top, the left arch foot and the right arch foot of the main arch of the arch bridge; placing explosives in each blast hole; respectively setting first delay nonel detonators in the blast holes at the arch top, the left arch foot and the right arch foot, setting second delay nonel detonators outside the blast holes, and connecting the first delay nonel detonators with the second delay nonel detonators in a cluster manner; performing main arch safety protection; detonating the arch top, and detonating the left arch foot and the right arch foot in a delayed manner so as to complete blasting demolition of the arch bridge. The method is reasonable in blast hole distribution, harmful effect of reinforced bridge blasting demolition is reduced effectively, intactness of peripheral to-be-protected object and personal property safety can be guaranteed by the protecting measure taken on the arch bridge, potential hazard of safety accidents can be prevented, cleaning is facilitated due to the fact that blasting slag piles in a concentrated manner, and environmental pollution is reduced effectively.
Description
Technical field
The present invention relates to a kind of field of bridge construction, particularly a kind of reinforced concrete arch bridge blasting demolishing method.
Background technology
Reinforced concrete arch bridge is applied in the road construction of modern society widely, and As time goes on the reinforced concrete arch bridge of large quantities of early stage construction, because a variety of causes becomes unsafe bridge, need to be removed processing.Due to artificial and mechanical removal potential safety hazard is too large, the general controlled blasting scheme that adopts is removed both at home and abroad at present, explosion be the bridge one safety of removing, reliably, mode efficiently, but reinforced concrete arch bridge in cities and towns adopt blasting demolishing method must strict controlled blasting vibration, all many-sided safety factors such as slungshot, bridge construction.Mostly adopted the mode of hydraulic pressure demolition to remove for the dismounting of reinforced concrete arch bridge in the past, but in the situation that bridge self has belonged to unsafe bridge, adopt hydraulic pressure demolition just to increase the potential safety hazard of operation, and explosion disintegrating slag not only environmental pollution is large, cleaning trouble, also easily cause building, crowd around produced to injury; Meanwhile, in cities and towns, compared with the long reinforced concrete arch bridge apart from clear span (more than 50m) in 1 hole of demolition blasting under complex environment, referential domestic successful explosion experience is considerably less.
Summary of the invention
The object of the invention is to overcome in prior art existing employing hydraulic pressure demolition and reinforced concrete arch bridge is carried out to demolition blasting potential safety hazard is large, the domestic above-mentioned deficiency less compared with the successful explosion experience of long span reinforced concrete arch bridge to single hole simultaneously, a kind of reinforced concrete arch bridge blasting demolishing method easy to operate, safe, low in the pollution of the environment is provided.
In order to realize foregoing invention object, the invention provides following technical scheme:
A kind of reinforced concrete arch bridge blasting demolishing method, comprises the following steps:
Step 1, big gun hole is set, is respectively equipped with several big gun holes in the vault of reinforced concrete arch bridge main arch, left arch springing, right arch springing position;
Step 3, layout delay detonating detonator, in hole, big gun hole on described vault, left arch springing, right arch springing, delay detonating detonator one is set respectively, delay detonating detonator two is set respectively outside hole, two bunches of described delay detonating detonators one, delay detonating detonator are linked togather;
Step 5, demolition blasting, lead quick-fried detonator two, delay to lead quick-fried detonator one explosive in big gun hole on described vault that first detonates by described extension successively, the explosive in big gun hole on the explosive in big gun hole, right arch springing on left arch springing described in delayed ignition, realizes the blasting in once-through of described reinforced concrete arch bridge and removes again.
Preferably, in described step 3, in the hole, big gun hole of vault, left arch springing, right arch springing, delay detonating detonator one is millisecond elementary errors Nonel detonator.
Preferably, in described step 3, hole, the big gun hole male extension Nonel detonator two of vault, left arch springing, right arch springing is half second elementary errors Nonel detonator.
Preferably, the explosive initiation time delay 350 ~ 650ms in described vault big gun hole, described left arch springing, right arch springing and described vault time difference time difference of detonating is 350 ~ 650ms.
Preferably, in described step 4, the left arch springing of main arch, right arch springing adopt straw mattress, gunnysack to wrap up protection, and described vault adopts sandbag to carry out ballast protection.
Preferably, described reinforced concrete arch bridge comprises access bridge arch, near described in draw arch bridge one side described main arch arch springing than postponing 350 ~ 650ms away from the main arch arch springing burst time of drawing arch bridge one side, described in draw arch bridge than postponing 350 ~ 650ms near the described main arch arch springing burst time of drawing arch bridge one side.
Preferably, described in draw arch bridge both sides and built the husky stalk of protection and steel pipe protective frame by laying bricks or stones, in described steel pipe protective frame, be equipped with protective screening.
compared with prior art, beneficial effect of the present invention:
Reinforced concrete arch bridge blasting demolishing method of the present invention is by the vault at main arch, left arch springing, right arch springing layout big gun hole and firing order is set, big gun hole arrangement is reasonable, effectively reduce reinforced concrete arch bridge explosion ill-effect, and safeguard procedures on arch bridge, are taked, can guarantee around the intact and personal safety as well as the property safety of protected object, stop security incident hidden danger and occur; The slag muck of explosion simultaneously is comparatively concentrated and is convenient to cleaning, has effectively reduced the pollution to environment; The method can be applied on the demolition blasting of double curvature arched bridge, box arch bridge, and is applicable to grow the demolition blasting apart from the reinforced concrete arch bridge of clear span (more than 50m).
Accompanying drawing explanation:
Fig. 1 is concrete-steel arch bridge blasting demolishing method flow chart of the present invention.
Fig. 2 is concrete-steel arch bridge structure schematic diagram of the present invention.
Fig. 3 is the big gun hole schematic diagram arranging on main arch of the present invention.
Fig. 4 is the big gun hole schematic cross-section arranging on main arch of the present invention.
Mark in figure:
1, main arch, 101, vault, 102, left arch springing, 103, right arch springing, 104, soffit, 2, access bridge arch, 3, access bridge arch springing, 4, big gun hole.
The specific embodiment
Below in conjunction with test example and the specific embodiment, the present invention is described in further detail.But this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology realizing based on content of the present invention all belong to scope of the present invention.
As Figure 1-4, a kind of reinforced concrete arch bridge blasting demolishing method, comprises the following steps:
Step 1 S01, big gun hole is set, is respectively equipped with several big gun holes 4 in vault 101, left arch springing 102, right arch springing 103 positions of reinforced concrete arch bridge main arch 1;
Step 3 S03, layout delay detonating detonator, on described vault 101, left arch springing 102, right arch springing 103, in the hole in big gun hole 4, delay detonating detonator one is set respectively, delay detonating detonator two is set respectively outside hole, two bunches of described delay detonating detonators one, delay detonating detonator are linked togather;
Step 5 S05, demolition blasting, lead quick-fried detonator two, delay to lead quick-fried detonator one explosive in big gun hole 4 on described vault 101 that first detonates by described extension successively, the explosive in big gun hole 4 on the explosive in big gun hole 4, right arch springing 103 on left arch springing 102 described in delayed ignition, realizes the blasting in once-through of described reinforced concrete arch bridge and removes again.
Wherein, in above-mentioned steps one S01, big gun hole 4 numbers that are respectively equipped with in vault 101, left arch springing 102, right arch springing 103 positions of reinforced concrete arch bridge main arch 1, size, the degree of depth, the number of determining big gun hole 4 according to the size of vault 101, left arch springing 102, right arch springing 103, and the array pitch (as shown in b in Fig. 3) in the spacing in every two big gun holes 4 (as shown in a in Fig. 3), every artillery salvo hole 4; In corresponding steps two S02, the unit losing quantity of explosive is also decided by factors such as the sizes of bridge.The main arch that can be various ways due to reinforced concrete arch bridge forms, as box arch bridge, ribbed arch bridge, double curvature arched bridge, rigid framed arch bridge, trussed bridge, simple system and combined system arch bridge etc., big gun hole 4 distributed quantities of every kind of structure main arch 1 and size can corresponding change to adapt to its arch bridge shape, for example, in the time that main arch 1 encircles for box, 4, the big gun hole arranging on its main arch 1 is uniformly distributed on each box unit of box arch of wanted explosion, as shown in Figure 4.
In above-mentioned steps Three S's 03, in 4 holes, big gun hole of vault 101, left arch springing 102, right arch springing 103, delay detonating detonator one is millisecond elementary errors Nonel detonator, and hole male extension Nonel detonator two is half second elementary errors Nonel detonator; Be time delay 350 ~ 650ms by the explosive initiation set of time in the big gun hole 4 of vault 101, left arch springing 102, right arch springing 103 and 101 time differences of vault time difference of detonating is 350 ~ 650ms, the vault 101 of main arch 1 first detonates in this case, then after left arch springing 102,103 time delays of right arch springing, detonate again simultaneously, main arch 1 is carried out after explosion, and more than 1 column, the bridge floor of main arch is just subject to gravity and removed; In addition according to actual needs, between left arch springing 102, right arch springing 103, can also take the time difference to detonate.
Safeguard procedures in step 4 S04 are mainly that explosion section is protected, for example, can also have soffit to adopt three layers of straw mattress, two-layer gunnysack to wrap up protection at left arch springing 102, right arch springing 103, and vault 1 adopts sandbag to carry out ballast protection.
In addition, existing reinforced concrete arch bridge is also connected with access bridge arch 3, also access bridge will be encircleed to 3 and carry out together demolition blasting in the time that main arch 1 carries out explosion, therefore need to big gun hole 4 and corresponding explosive, delay detonating detonator detonator be set equally on arch bridge 3 drawing.In the time that the time difference of detonating arranges, the vault 101 of main arch 1 is first ignited, postpone comparing away from main arch 1 arch springing (as the right arch springing 103) late 350 ~ 650ms of burst time that draws arch bridge 3 one sides near main arch 1 arch springing (as left arch springing 102) that draws arch bridge 3 one sides after 350 ~ 650ms, and draw arch bridge 3 than close described master 1 arch springing (as the left arch springing 102) late 350 ~ 650ms of burst time of arch bridge 3 one sides that draws; So just can form explosion vault 101 successively, away from draw right arch springing 103 successively of arch bridge 3, near draw arch bridge 3 left arch springing 102, draw arch bridge 3, realize in order the dismounting of whole reinforcing bar slow setting soil arch bridge.
Especially, generally grout bar stone structure owing to drawing arch bridge 3, conduct oneself with dignity larger, while caving in for avoiding drawing arch bridge explosion to protected object around (as building thing, bottom road) produce and destroy, in its collapse range, adopt flexible cushion protection damping, concrete grammar is: for example consider to draw the long 2m of arch bridge, adopt flexible material (as fine sand, containing stone earth or bundled haystack) be laid on collapse range, bed course size is long, wide, thickness is respectively 20m × 15m × (0.5 ~ 1.5m), encircle 3 both sides 5m scopes at access bridge simultaneously and respectively build the husky ridge of the long protection of 60m by laying bricks or stones, as long in husky ridge size, wide, height is respectively that 60m × (1.2 ~ 2.0 m) × (1.0 ~ 1.5m), secondly set up double-row steel pipe protective frame in the husky ridge of next-door neighbour side, and lay the soft protecting net slungshot injury protected object that prevents from contacting to earth, after ready, carry out again demolition blasting.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a reinforced concrete arch bridge blasting demolishing method, is characterized in that, comprises the following steps:
Step 1, big gun hole (4) is set, is respectively equipped with several big gun holes (4) in the vault (101) of reinforced concrete arch bridge main arch (1), left arch springing (102), right arch springing (103) position;
Step 2, installation explosive, explosive in the hole, each big gun hole (4) of described vault (101), left arch springing (102), right arch springing (103);
Step 3, layout delay detonating detonator, in the hole, big gun hole (101) of described vault (101), left arch springing (102), right arch springing (103), delay detonating detonator one is set respectively, delay detonating detonator two is set respectively outside hole, two bunches of described delay detonating detonators one, delay detonating detonator are linked togather;
Step 4, main arch (1) protection, carry out the security protection of anti-blasting flyrock to described reinforced concrete arch bridge main arch (1);
Step 5, demolition blasting, lead quick-fried detonator two, delay to lead the explosive that quick-fried detonator one first detonates in the upper big gun hole (4) of described vault (101) by described extension successively, explosive in explosive in the upper big gun hole (4) of left arch springing (102), the upper big gun of right arch springing (103) hole described in delayed ignition, realizes the blasting in once-through of described reinforced concrete arch bridge and removes again.
2. reinforced concrete arch bridge blasting demolishing method according to claim 1, it is characterized in that, in the hole, big gun hole (4) of vault in described step 3 (101), left arch springing (102), right arch springing (103), delay detonating detonator one is millisecond elementary errors Nonel detonator.
3. reinforced concrete arch bridge blasting demolishing method according to claim 1 and 2, it is characterized in that, hole, big gun hole (4) the male extension Nonel detonator two of vault in described step 3 (101), left arch springing (102), right arch springing (103) is half second elementary errors Nonel detonator.
4. reinforced concrete arch bridge blasting demolishing method according to claim 3, it is characterized in that, the explosive initiation time delay 350 ~ 650ms in the upper big gun hole (4) of described vault (101), described left arch springing (102), right arch springing (103) and described vault (101) time difference time difference of detonating is 350 ~ 650ms.
5. reinforced concrete arch bridge blasting demolishing method according to claim 1, it is characterized in that, the left arch springing (102) of main arch in described step 4 (1), right arch springing (103) adopt straw mattress, gunnysack to wrap up protection, and described vault (101) adopts sandbag to carry out ballast protection.
6. reinforced concrete arch bridge blasting demolishing method according to claim 1, it is characterized in that, described reinforced concrete arch bridge comprises access bridge arch (3), near described in draw arch bridge (3) one sides described main arch (1) arch springing than postponing 350 ~ 650ms away from main arch (1) the arch springing burst time of drawing arch bridge (3) one sides, described in draw arch bridge (3) than postponing 350 ~ 650ms near described main arch (1) the arch springing burst time of drawing arch bridge (3) one sides.
7. reinforced concrete arch bridge blasting demolishing method according to claim 6, is characterized in that, described in draw arch bridge (3) both sides and built the husky stalk of protection and steel pipe protective frame by laying bricks or stones, in described steel pipe protective frame, be equipped with protective screening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585935.1A CN103898842B (en) | 2012-12-28 | 2012-12-28 | Reinforced concrete arch bridge blasting demolishing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585935.1A CN103898842B (en) | 2012-12-28 | 2012-12-28 | Reinforced concrete arch bridge blasting demolishing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103898842A true CN103898842A (en) | 2014-07-02 |
| CN103898842B CN103898842B (en) | 2016-10-19 |
Family
ID=50990397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210585935.1A Active CN103898842B (en) | 2012-12-28 | 2012-12-28 | Reinforced concrete arch bridge blasting demolishing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103898842B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215136A (en) * | 2014-09-01 | 2014-12-17 | 武汉宏伟交通爆破工程有限公司 | Charging, blocking and slag pressing structure of demolition blasting blast-holes of reinforced concrete beam and demolition blasting method |
| CN104775367A (en) * | 2015-02-07 | 2015-07-15 | 河南理工大学 | Method for blasting demolition of bridge in urban area by controlling stepping-type sequential collapse |
| CN104930936A (en) * | 2015-06-24 | 2015-09-23 | 中交一公局第五工程有限公司 | Rapid controlled blasting demolition method for arch-shaped highway over-line bridge |
| CN105648931A (en) * | 2015-12-31 | 2016-06-08 | 中铁二局集团有限公司 | Blasting method of separated type overpass |
| CN107328322A (en) * | 2017-06-30 | 2017-11-07 | 中国建筑第七工程局有限公司 | Cable-stayed type truss bridge blasting method is held under one kind |
| CN110470187A (en) * | 2019-09-12 | 2019-11-19 | 浙江省高能爆破工程有限公司 | A kind of blasting circuit suspension protective device and method |
| CN111364378A (en) * | 2020-03-12 | 2020-07-03 | 中铁大桥局武汉桥梁特种技术有限公司 | Method for dismantling double-arch bridge |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005179924A (en) * | 2003-12-16 | 2005-07-07 | Sumitomo Mitsui Construction Co Ltd | Method for blowing up and demolishing reinforced concrete structure |
| CN103362077A (en) * | 2013-07-29 | 2013-10-23 | 中铁二局股份有限公司 | Construction method for dismounting haplopore box type arch bridge by virtue of water pressure short hole and medium-length hole comprehensive decrepitation method |
-
2012
- 2012-12-28 CN CN201210585935.1A patent/CN103898842B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005179924A (en) * | 2003-12-16 | 2005-07-07 | Sumitomo Mitsui Construction Co Ltd | Method for blowing up and demolishing reinforced concrete structure |
| CN103362077A (en) * | 2013-07-29 | 2013-10-23 | 中铁二局股份有限公司 | Construction method for dismounting haplopore box type arch bridge by virtue of water pressure short hole and medium-length hole comprehensive decrepitation method |
Non-Patent Citations (4)
| Title |
|---|
| 周勇等: "复杂环境薄壁箱型拱肋双曲拱桥爆破拆除", 《中华建设》 * |
| 杨臣武: "山区火电厂施工特点", 《电力建设》 * |
| 王海峰: "控制爆破拆除钢筋混凝土双曲拱桥", 《爆破》 * |
| 谢先启等: "宜春大桥爆破拆除", 《爆破》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215136A (en) * | 2014-09-01 | 2014-12-17 | 武汉宏伟交通爆破工程有限公司 | Charging, blocking and slag pressing structure of demolition blasting blast-holes of reinforced concrete beam and demolition blasting method |
| CN104215136B (en) * | 2014-09-01 | 2016-01-06 | 武汉宏伟交通爆破工程有限公司 | Reinforced beam demolition blasting blast hole projectile filling, blocking and pressure slag structure and demolition blasting method |
| CN104775367A (en) * | 2015-02-07 | 2015-07-15 | 河南理工大学 | Method for blasting demolition of bridge in urban area by controlling stepping-type sequential collapse |
| CN104930936A (en) * | 2015-06-24 | 2015-09-23 | 中交一公局第五工程有限公司 | Rapid controlled blasting demolition method for arch-shaped highway over-line bridge |
| CN104930936B (en) * | 2015-06-24 | 2016-05-04 | 中交一公局第五工程有限公司 | Highway arch form line bridge controlled blasting fast dismantling eliminating method |
| CN105648931A (en) * | 2015-12-31 | 2016-06-08 | 中铁二局集团有限公司 | Blasting method of separated type overpass |
| CN107328322A (en) * | 2017-06-30 | 2017-11-07 | 中国建筑第七工程局有限公司 | Cable-stayed type truss bridge blasting method is held under one kind |
| CN107328322B (en) * | 2017-06-30 | 2018-09-21 | 中国建筑第七工程局有限公司 | Cable-stayed type truss bridge blasting method is held under one kind |
| CN110470187A (en) * | 2019-09-12 | 2019-11-19 | 浙江省高能爆破工程有限公司 | A kind of blasting circuit suspension protective device and method |
| CN111364378A (en) * | 2020-03-12 | 2020-07-03 | 中铁大桥局武汉桥梁特种技术有限公司 | Method for dismantling double-arch bridge |
| CN111364378B (en) * | 2020-03-12 | 2021-07-20 | 中铁大桥局武汉桥梁特种技术有限公司 | Method for dismantling double-arch bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103898842B (en) | 2016-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103898842A (en) | Blasting demolition method of reinforced concrete arch bridge | |
| CN108661643B (en) | It a kind of coal working face end adopts return channel and cuts top release shield lane method | |
| CN110145326B (en) | Surrounding rock stability control method suitable for coal mining area main roadway | |
| CN103629980B (en) | Near existing line steep massif Loose Control Blasting construction method | |
| CN101967888A (en) | Multidirectional multi-fold blasting method for high-rise building with frame-shear structure | |
| WO2011103620A1 (en) | A method of reducing subsidence or windblast impacts from longwall mining | |
| CN105157493B (en) | A kind of explosion expansion tube and blasting method thereof | |
| CN109339797A (en) | A kind of minimum clear-distance tunnel is appeared damping construction method | |
| CN103175451A (en) | Construction method of tunnel shock relieve hole controlling blasting | |
| CN113152928B (en) | Dismantling method for super high-rise building | |
| EA027129B1 (en) | Undercut excavation method with continuous concrete floors | |
| CN113704861B (en) | Deep roadway energy-absorbing support design method and system | |
| CN111411962A (en) | Coal mine rock burst treatment method | |
| CN104930936A (en) | Rapid controlled blasting demolition method for arch-shaped highway over-line bridge | |
| CN108590667B (en) | Tunnel excavation and primary support method based on regional surrounding rock fracture evolution analysis | |
| CN105157491A (en) | Blasting method for forming dome through tunnel large section | |
| CN104457466B (en) | A kind of blasting method of tunnel open excavation section | |
| CN103362077A (en) | Construction method for dismounting haplopore box type arch bridge by virtue of water pressure short hole and medium-length hole comprehensive decrepitation method | |
| CN112504041B (en) | Method for reducing tunnel blasting excavation vibration speed in urban sensitive environment | |
| CN108413822B (en) | Upward fan-shaped medium-length hole damping blasting method | |
| CN202247902U (en) | Millisecond controlled blasting demolishing structure for foundation pit inner support beam | |
| CN204495211U (en) | A kind of blasting hole arrangement system of tunnel open excavation section | |
| CN108362180A (en) | A kind of surge wave means of defence of armored concrete water-retaining cofferdam antiseepage stake demolition blasting | |
| CN109630134B (en) | Roadway structure and one-time roadway forming supporting method of high-ground-stress soft rock roadway | |
| CN103321643B (en) | A kind of excavation method of ox muzzle shape tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160303 Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Applicant after: CHINA RAILWAY NO.2 BUREAU ENGINEERING Co.,Ltd. Address before: 610041, No. nine, No. 156, building B, high building, Xing Xing Road, Chengdu hi tech Zone, Sichuan Applicant before: CHINA RAILWAY ERJU Co.,Ltd. Applicant before: CHINA RAILWAY ERJU THIRD ENGINEERING Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Patentee after: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Address before: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Patentee before: CHINA RAILWAY NO.2 BUREAU ENGINEERING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181218 Address after: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Co-patentee after: CHINA RAILWAY ERJU THIRD ENGINEERING Co.,Ltd. Patentee after: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Address before: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Patentee before: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right |