CN109555030A - The method of attaching of middle box culvert caulking strip - Google Patents
The method of attaching of middle box culvert caulking strip Download PDFInfo
- Publication number
- CN109555030A CN109555030A CN201811648648.4A CN201811648648A CN109555030A CN 109555030 A CN109555030 A CN 109555030A CN 201811648648 A CN201811648648 A CN 201811648648A CN 109555030 A CN109555030 A CN 109555030A
- Authority
- CN
- China
- Prior art keywords
- box culvert
- paste
- caulking strip
- filleting
- middle box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000007547 defect Effects 0.000 claims description 15
- 230000003068 static effect Effects 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 6
- 230000008439 repair process Effects 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000012549 training Methods 0.000 description 8
- 238000007689 inspection Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
Abstract
This application discloses a kind of method of attaching of middle box culvert caulking strip.This method comprises: the location for paste of the filleting of centering box culvert is selected to be dried, make the location for paste of filleting is dry to make an uproar；Alite paste is smeared in the location for paste of middle box culvert, and day smears alite paste and checks whether the area of the location for paste of alite paste covering is more than threshold value later；In the case where being less than as threshold value, smearing alite paste is re-started；In the case where being more than threshold value, scheduled duration is placed；After placing scheduled duration, caulking strip is inserted in the groove of filleting；Tight caulking strip is successively struck, makes caulking strip docile on middle box culvert.It solves the problems, such as not to be sealed filleting in the related technology, in the presence of may result in construction, improves middle box culvert construction technology.
Description
Technical field
This application involves engineering fields, in particular to the method for attaching of middle box culvert caulking strip.
Background technique
Box culvert refers to the culvert that barrel is built with reinforced concrete box shaped tube coupling.Box culvert is by one or more regular shapes
Section composition, is generally made of armored concrete or bricklaying.But armored concrete application is wider, uses reinforced concrete box culvert ratio
It is relatively wide.
For certain culverts, multiple box culverts are needed.For example, bigger culvert is formed with three box culverts, wherein two
The box culvert at edge is referred to as middle box culvert, and both sides are all referred to as middle box culvert with the box culvert of the centre of box culvert adjoining.
Inventors have found that may result in and apply if not being sealed to filleting in the case where needing multiple box culverts
There are problems in work, and there is no the enlightenments being sealed to box culvert in the prior art, also without relevant encapsulating method.
Not being sealed in the related technology to filleting, aiming at the problem that may result in the presence of construction, currently without
Preferable solution.
Summary of the invention
This application provides the method for attaching of middle box culvert caulking strip, close for not carrying out in the related technology to filleting to solve
The problem of sealing in the presence of then may result in construction.
According to the one aspect of the application, a kind of method of attaching of middle box culvert caulking strip is provided, comprising: centering box culvert
The location for paste of filleting is dried, and makes the location for paste of the filleting is dry to make an uproar, wherein the location for paste includes；Middle box culvert ring contact
Face, the reserved groove for pasting caulking strip；Alite paste is smeared in the location for paste of the middle box culvert, and inspection after alite paste is smeared in day
Whether the area of the location for paste of the alite paste covering is more than threshold value；In the case where being less than as the threshold value, again
It carries out smearing the alite paste；In the case where being more than the threshold value, scheduled duration is placed, wherein the scheduled duration is root
It is determined according to the temperature and humidity being previously obtained with the corresponding table for placing duration；After placing scheduled duration, by caulking strip
It is inserted in the groove of filleting, wherein unified by the caulking strip when being inserted in caulking strip in the reserved groove of the middle box culvert
The outer arc side of outer edge and the reserved groove of the middle box culvert is close to, and first fixes corner when being inserted in caulking strip, then to corner
Both sides push；The tight caulking strip is successively struck, makes the caulking strip docile on the middle box culvert.
Further, before the location for paste of the filleting to the middle box culvert is dried, the method also includes:
The location for paste is cleared up, so that the location for paste is without attachment.
Further, before being dried to the location for paste of the filleting of the middle box culvert, the method also includes: sentence
The filleting that breaks then repairs the defect if there is defect with the presence or absence of defect.
Further, the predetermined time is 10 to 30 minutes.
Further, carrying out drying to the location for paste of the filleting of the middle box culvert includes: using blowtorch to the middle box culvert
The location for paste of filleting dried.
Further, successively strike the tight caulking strip make the caulking strip docile on the middle box culvert after, it is described
Method further include: by the middle static placement of box culvert more than 12 hours.
Further, by the static placement of the middle box culvert more than 12 hours after, which comprises in institute to be installed
State the position installation connecting bolt gasket of middle box culvert；By the raising middle flask cable case under the connecting bolt gasket.
Further, after by the raising middle flask cable case under the connecting bolt gasket, which comprises check
Whether the caulking strip pasted falls off, and in the case where falling off, is pasted again.
It further, included: by the middle box culvert surface covering waterproof more than 12 hours by the middle static placement of box culvert
The static placement of measure was more than 12 hours.
Further, before the caulking strip is inserted in the groove of the filleting, the method also includes: to described
Caulking strip smears waterproofing agent.
By the application, using following steps: the location for paste of the filleting of centering box culvert is dried, and makes the viscous of the filleting
It is dry at patch to make an uproar, wherein the location for paste includes；Middle box culvert loop interface, the reserved groove for pasting caulking strip；In the middle box culvert
Location for paste smear alite paste, and day smear check after alite paste the location for paste of alite paste covering area whether
More than threshold value；In the case where being less than as the threshold value, re-starts and smear the alite paste；It is being more than the feelings of the threshold value
Under condition, scheduled duration is placed, wherein the scheduled duration is corresponding with placement duration according to the temperature and humidity being previously obtained
What table determined；After placing scheduled duration, caulking strip is inserted in the groove of filleting, wherein be inserted in caulking strip described
It is unified to lean on the outer arc side of the outer edge and the reserved groove of the middle box culvert of the caulking strip when in the reserved groove of middle box culvert
Tightly, first corner is fixed when being inserted in caulking strip, then is pushed to corner both sides；The tight caulking strip is successively struck, the filleting is made
Docile is on the middle box culvert.It solves and filleting is not sealed in the related technology, in the presence of may result in construction
The problem of, improve middle box culvert construction technology.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present application, the schematic reality of the application
Example and its explanation are applied for explaining the application, is not constituted an undue limitation on the present application.In the accompanying drawings:
Fig. 1 is the flow chart according to the method for attaching of middle box culvert caulking strip provided by the embodiments of the present application.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
In the present embodiment, a kind of method of attaching of middle box culvert caulking strip is provided, Fig. 1 is mentioned according to the embodiment of the present application
The flow chart of the method for attaching of the middle box culvert caulking strip supplied, as shown in Figure 1, the process includes the following steps:
The location for paste of step S101, the filleting of centering box culvert are dried, and make the location for paste of filleting is dry to make an uproar, wherein are pasted
Place includes；Middle box culvert loop interface, the reserved groove for pasting caulking strip；
Step S102 smears alite paste in the location for paste of middle box culvert, and inspection alite paste covering after alite paste is smeared in day
The area of location for paste whether be more than threshold value；
Step S103 re-starts smearing alite paste in the case where being less than as threshold value；Be more than threshold value the case where
Under, place scheduled duration, wherein scheduled duration is true according to the temperature and humidity that are previously obtained and the corresponding table for placing duration
Fixed；
Caulking strip is inserted in the groove of filleting by step S104 after placing scheduled duration, wherein by caulking strip set
It is unified to be close to the outer arc side of the reserved groove of the outer edge and middle box culvert of caulking strip when entering in the reserved groove of box culvert, it covers
First corner is fixed when entering caulking strip, then is pushed to corner both sides；
Step S105 successively strikes tight caulking strip, makes caulking strip docile on middle box culvert.
It solves and filleting is not sealed in the related technology through the above steps, in the presence of may result in construction
The problem of, improve middle box culvert construction technology.
Optionally, before the location for paste of the filleting to middle box culvert is dried, the above method further include: to location for paste into
Row cleaning, so that location for paste is without attachment.
Optionally, before the location for paste of the filleting of centering box culvert is dried, the above method further include: whether judge filleting
Existing defects then repair defect if there is defect.
Optionally, the predetermined time is 10 to 30 minutes；Preferably 10 to 15 minutes.
Optionally, the location for paste of the filleting of centering box culvert carry out drying include: using blowtorch centering box culvert filleting it is viscous
It is dried at patch.
Optionally, successively strike tight caulking strip make caulking strip docile on middle box culvert after, the above method further include: will in
The static placement of box culvert was more than 12 hours.
Optionally, after placement that middle box culvert is static was more than 12 hours, the above method includes: in middle box culvert to be installed
Position is installed by connecting bolt gasket；By raising middle flask cable case under connecting bolt gasket.
Optionally, after by raising middle flask cable case under connecting bolt gasket, the above method includes: the filleting for checking and pasting
Whether item falls off, and in the case where falling off, is pasted again.
It optionally, included: that middle box culvert surface covers to waterproof measure is static to be put more than 12 hours by the static placement of middle box culvert
It sets more than 12 hours.
Optionally, before in the groove that caulking strip is inserted in filleting, the above method further include: waterproof is smeared to caulking strip
Agent.
It is illustrated below with reference to an alternative embodiment.
Preparation before caulking strip stickup
After middle box culvert reaches building site, preferably by the side of inspecting for acceptance of quality inspection engineer and management carry out again in box culvert stickup
Preparation.Box culvert all carries out presentation quality inspection in every piece, middle box culvert surface answer it is bright and clean smooth, no honeycomb, dew muscle, flawless,
Unfilled corner.If finding light defects in filleting attachment, light defects are modified, filleting is nearby not allow for defect, hole
Position should be complete, the sundries such as no cement slurry.Middle box culvert there are mass defect is repaired, according to middle box culvert after passed examination
Box culvert in category classification stacking.
The filleting of box culvert in judgement can be sentenced with the presence or absence of the mode of defect by the way of artificial intelligence
Disconnected: the filleting of centering box culvert is taken pictures, and the photo taken pictures then is carried out binary conversion treatment, obtains black and white figure
Picture.Using black and white image as input data, it is input in preparatory trained model.The model is by multiple groups training number
It is obtained according to training, training data includes two classes, includes flawless middle box culvert filleting in every group of first kind training data
Black-and-white photograph and identify the black-and-white photograph be flawless middle box culvert photo identification information；In second every group of class training data
It include the black-and-white photograph of defective middle box culvert filleting and the identification information for identifying the black-and-white photograph defective locations.Pass through this
The filleting that the model that sample training obtains can just obtain box culvert in this after the photo for inputting a middle box culvert filleting whether there is
The conclusion of defect.Narrow in the situation using big data quantity training, judging can be more accurate with the increasing of amount of training data,
Efficiency and accuracy are improved compared to manual identified.
Middle box culvert caulking strip is pasted
Before caulking strip is pasted, box culvert need to prepare following material in each piece:
| Serial number | Project | Type | Unit | Quantity | Remarks |
| 1 | Caulking strip | Circumferential weld | Set | 1 | |
| 2 | Adhesive glue | Bucket | 1 | ||
| 3 | Brush | ? | 5 | ||
| 4 | Glue scraping cutter | ? | 2 | ||
| 5 | Wooden mallet | It is a | 2 | ||
| 6 | Glue bucket | It is a | 2 |
1. box culvert cleaning should ensure that filleting portion faces without attachment, free from dust in, and centering box culvert is made when not allowing to clear up
At damage, it is smooth clean and tidy to clear up rear surface.
2. material preparation will rationally be prepared sticking construction tool and middle box culvert caulking strip etc., the material used by technical instruction
It needs to use after the assay was approved as required.
3. dry cleansing is answered on box culvert surface in when pasting, when necessary using the portion for pasting caulking strip on box culvert in blowtorch drying
Position.
4. smearing alite paste on middle box culvert loop interface, the reserved groove for pasting caulking strip with brush, smears and wants uniformly,
Do not allow to leak brush phenomenon to occur.
5. cool after being painted with alite paste set a period of time (10-15 minutes general, different with gas epidemic disaster), contacted to finger
When not viscous, then the frame shape caulking strip processed is inserted in filleting groove.
It is unified that the outer edge of caulking strip and middle box culvert are reserved into groove 6. caulking strip is inserted in the reserved groove of middle box culvert
Outer arc side be close to, first corner is fixed when being inserted in caulking strip, then to corner both sides push.
7. successively striking tight caulking strip with wooden mallet, make caulking strip docile on middle box culvert, be careful not to crack caulking strip, glues
Caulking strip after patch answers that secured, smooth, tight, position is accurate, must not have heave, overlength and phenomena such as notch.The institute of middle box culvert
There is corner there is not allowed that shrugging, sunken shoulder phenomenon.Middle box culvert is being pasted in installing caulking strip 12h, and underground must not be sent assembled.
8. connection bolt elastic packing washer is gone into the well by quantity with middle box culvert bolt matching, in the progress of underground when box culvert installation
It is sleeved under connecting bolt gasket.
9. wet weather or rainy day, surface covered Lock gate it is noted that protecting to the caulking strip pasted.
10. to smear waterproofing agent to caulking strip when the ponding of underground.
The caulking strip that posted must not be caused to damage when box culvert is gone into the well and transported in 11..
Construction lofting
It is tested in batches to box culvert in finished product according to construction speed and assembled quality condition, survey engineer, simultaneously
Construction lofting is carried out to box culvert in i.e. assembly.Every batch of is 5~10 pieces, and measures interval and be not more than 3 days；If multiple batches of middle box culvert
Assembled quality is preferable, then can suitably increase box culvert quantity in every batch of；Conversely, should then increase measurement frequency, every batch of is reduced
Quantity.
Construction lofting content include two aspect contents: first is that in finished product box culvert inspection, inspection content includes: the gradient, height
Faulting of slab ends and seam situation between journey, mileage and adjacent section of jurisdiction.Second is that the setting-out of middle box culvert to be assembled, includes mileage, two sides
The contents such as boundary, design and actual measurement end face elevation.
After survey engineer completes measurement, is formed measurement report (this work should be completed in 1h), in time propose report
Give shield driver.Shield driver is according to measurement report as a result, determining the assembling scheme of next step.If box culvert is spelled in report display
Dress error transfinites, then should link up in time with supervision control engineering teacher and chief technology officer, determines handling suggestion and provides assembly side in next step
Case.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including element
There is also other identical elements in process, method, commodity or equipment.
The above is only embodiments herein, are not intended to limit this application.To those skilled in the art,
Various changes and changes are possible in this application.It is all within the spirit and principles of the present application made by any modification, equivalent replacement,
Improve etc., it should be included within the scope of the claims of this application.
Claims (10)
1. a kind of method of attaching of middle box culvert caulking strip characterized by comprising
The location for paste of the filleting of centering box culvert is dried, and makes the location for paste of the filleting is dry to make an uproar, wherein the location for paste packet
It includes；Middle box culvert loop interface, the reserved groove for pasting caulking strip；
Alite paste is smeared in the location for paste of the middle box culvert, and day smears alite paste and checks the described of the alite paste covering later
Whether the area of location for paste is more than threshold value；
In the case where being less than as the threshold value, re-starts and smear the alite paste；In the case where being more than the threshold value,
Place scheduled duration, wherein the scheduled duration is the corresponding table according to the temperature and humidity being previously obtained and placement duration
Determining；
After placing scheduled duration, caulking strip is inserted in the groove of filleting, wherein caulking strip is inserted in the middle box culvert
It is unified to be close to the outer arc side of the outer edge and the reserved groove of the middle box culvert of the caulking strip when in reserved groove, it is inserted in
First corner is fixed when caulking strip, then is pushed to corner both sides；
The tight caulking strip is successively struck, makes the caulking strip docile on the middle box culvert.
2. the method according to claim 1, wherein being carried out in the location for paste of the filleting to the middle box culvert
Before drying, the method also includes:
The location for paste is cleared up, so that the location for paste is without attachment.
3. method according to claim 1 or 2, which is characterized in that the location for paste of the filleting of the middle box culvert into
Before row drying, the method also includes:
Judge that the filleting then repairs the defect if there is defect with the presence or absence of defect.
4. according to the method described in claim 3, it is characterized in that, the predetermined time is 10 to 30 minutes.
5. according to the method described in claim 3, it is characterized in that, carrying out drying packet to the location for paste of the filleting of the middle box culvert
It includes:
It is dried using location for paste of the blowtorch to the filleting of the middle box culvert.
6. the method according to claim 1, wherein making the caulking strip docile successively striking the tight caulking strip
After on the middle box culvert, the method also includes:
By the middle static placement of box culvert more than 12 hours.
7. according to the method described in claim 6, it is characterized in that, by the static placement of the middle box culvert more than 12 hours it
Afterwards, which comprises
Connecting bolt gasket is installed in the position of the middle box culvert to be installed；
By the raising middle flask cable case under the connecting bolt gasket.
8. the method according to the description of claim 7 is characterized in that the raising middle flask cable case is mounted in the connecting bolt gasket
After lower, which comprises
It checks whether the caulking strip pasted falls off, in the case where falling off, is pasted again.
9. according to the method described in claim 6, it is characterized in that, including: more than 12 hours by the middle static placement of box culvert
By the middle static placement of box culvert surface covering waterproof measure more than 12 hours.
10. the method according to claim 1, wherein the caulking strip is inserted in the groove of the filleting
Before, the method also includes:
Waterproofing agent is smeared to the caulking strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648648.4A CN109555030A (en) | 2018-12-30 | 2018-12-30 | The method of attaching of middle box culvert caulking strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648648.4A CN109555030A (en) | 2018-12-30 | 2018-12-30 | The method of attaching of middle box culvert caulking strip |
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| Publication Number | Publication Date |
|---|---|
| CN109555030A true CN109555030A (en) | 2019-04-02 |
Family
ID=65872111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811648648.4A Pending CN109555030A (en) | 2018-12-30 | 2018-12-30 | The method of attaching of middle box culvert caulking strip |
Country Status (1)
| Country | Link |
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| CN (1) | CN109555030A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251491A (en) * | 2011-04-15 | 2011-11-23 | 吴兆圣 | Waterproof method for prefabricated reinforced concrete box culvert interfaces and interface water stopper |
| CN102418319A (en) * | 2011-09-23 | 2012-04-18 | 新疆交通科学研究院 | Prefabricated assembled box culvert and construction method thereof |
| CN208023426U (en) * | 2018-03-27 | 2018-10-30 | 山东天马新型建材有限公司 | A kind of Prefabricated spilt formula equal tee box culvert |
-
2018
- 2018-12-30 CN CN201811648648.4A patent/CN109555030A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251491A (en) * | 2011-04-15 | 2011-11-23 | 吴兆圣 | Waterproof method for prefabricated reinforced concrete box culvert interfaces and interface water stopper |
| CN102418319A (en) * | 2011-09-23 | 2012-04-18 | 新疆交通科学研究院 | Prefabricated assembled box culvert and construction method thereof |
| CN208023426U (en) * | 2018-03-27 | 2018-10-30 | 山东天马新型建材有限公司 | A kind of Prefabricated spilt formula equal tee box culvert |
Non-Patent Citations (2)
| Title |
|---|
| 吴斌等: ""关于装配式箱涵施工中防水的措施"", 《建筑技术》 * |
| 石立国等: ""上下分体装配式预制管廊施工技术"", 《施工技术》 * |
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Effective date of registration: 20191008 Address after: Lixia District, Shandong city of Ji'nan province 250000 Olympic road No. 2666, building A, railway construction Applicant after: CHINA RAILWAY SHISIJU Group Corp. Applicant after: CHINA RAILWAY 14TH BUREAU GROUP SHIELD ENGINEERING Co.,Ltd. Address before: Lixia District, Shandong city of Ji'nan province 250000 Olympic road No. 2666, building A, railway construction Applicant before: CHINA RAILWAY SHISIJU Group Corp. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190402 |