CN111997649A - Tunnel-first post-station underground excavation station segment removal construction method and segment removal tool used by same - Google Patents
Tunnel-first post-station underground excavation station segment removal construction method and segment removal tool used by same Download PDFInfo
- Publication number
- CN111997649A CN111997649A CN202010968004.4A CN202010968004A CN111997649A CN 111997649 A CN111997649 A CN 111997649A CN 202010968004 A CN202010968004 A CN 202010968004A CN 111997649 A CN111997649 A CN 111997649A
- Authority
- CN
- China
- Prior art keywords
- segment
- station
- tunnel
- duct piece
- construction method
- 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
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000009412 basement excavation Methods 0.000 title claims abstract description 15
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 230000005641 tunneling Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/12—Temporary supports for use during building; Accessories
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
Abstract
The invention discloses a tunnel-first and station-later underground excavation station segment removing construction method and a segment removing tool used by the tunnel-first and station-later underground excavation station segment removing construction method, and aims to solve the technical problems that the existing segment removing construction method is high in operation risk, and a removed segment is damaged and cannot be reused. Which comprises the following steps: (1) full-ring grouting of duct pieces at the interface positions; (2) reinforcing the duct piece at the interface position; (3) and after the earthwork at the top of the tunnel is dug, removing the duct piece at the interface position by using a duct piece removing tool. The used duct piece dismantling tool comprises a support frame, a duct piece assembling machine and an assembling machine power system. The segment removing tool does not need to damage the segments, after the segment bolts are detached, the segments are slowly removed through the mounting machine and are transported to the segment trolley, and the segments are sequentially removed without being damaged, so that the damage to the segments is avoided.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a method for removing duct pieces of a tunnel-first and station-later underground excavation station and a duct piece removing tool used by the method.
Background
In order to reduce the influence of the urban subway station progress on the construction progress of the shield interval, a construction method of firstly tunneling and then tunneling is mostly adopted in the shield interval. After shield construction is passed, shield segments need to be removed when a station excavates a negative two-layer structure, and since the shield segments are positioned on a station layer and the size (3.8 m arc 1.5m 0.3 m) and the weight (about 4 tons) of a single shield segment are large, the removal of the shield segments is one of the major difficulties.
At present, the mode of setting up a platform and a steel support is often adopted for removing duct pieces at home and abroad, the duct pieces are removed in a non-mechanical mode, such as duct piece removal by a blasting machine, a water drill, a percussion drill and the like, the duct pieces are removed, the hydraulic wrench, the water drill, the percussion drill, a drill rod and other removing tools are required to be equipped, and lifting tools such as a steel wire rope, a shackle and a special duct piece lifting bolt and the like are required to be equipped.
Disclosure of Invention
The invention aims to solve the technical problems that the construction method for removing the duct piece of the tunnel-first and station-later underground excavation station and the duct piece removing tool used by the construction method are high in operation risk and the removed duct piece is damaged and cannot be reused in the existing duct piece removing construction method.
In order to solve the technical problems, the invention adopts the following technical scheme:
a tunnel-first and station-later underground excavation station duct piece dismantling construction method is designed, and comprises the following steps:
(1) performing full-circle grouting on duct pieces at the interface position between a station and a shield interval;
(2) reinforcing the duct piece at the interface position;
(3) and after earthwork at the top of the tunnel is dug, removing the duct piece at the interface position by using a duct piece removing tool, firstly removing a duct piece bolt, and then removing the K block, the adjacent block and the standard block from top to bottom respectively.
Preferably, in the step (1), a double-liquid grouting machine is adopted to continuously and three-annularly apply the pipe piece at the interface position to form a closed ring, and double-liquid grouting is injected.
Preferably, the double-fluid slurry comprises cement slurry and water glass, and the grouting sequence is from bottom to top, and staggered hole-opening grouting is performed.
Preferably, in the step (2), I-shaped steel is adopted to reinforce the duct piece at the interface position, and the reinforcing range is six rings of the tunnel part at the joint position of the station and the tunnel.
Preferably, in the step (2), a steel plate cushion block is arranged between the temporary support and the shield segment in the circumferential direction of the shield, and a rubber pad is arranged between the steel plate and the segment.
Preferably, in the step (2), a support frame is arranged at the joint position, the support frame is an end three-ring structure, the support frame is six rings in total, the support frame is made of I-shaped steel, and a flexible support pad is arranged at the contact position of the support frame and the pipe piece at the joint position.
Preferably, in the step (3), a hole is reserved at a corresponding position below the middle plate during construction, a lifting hook is installed by using the reserved hole, the duct pieces are dismantled block by adopting a chain block, and the temporary support is used for supporting in the tunnel during dismantling of the duct pieces.
Preferably, in the step (3), when the duct piece is dismantled, the duct piece bolts are dismantled in sequence from top to bottom, and the dismantling sequence is K blocks, adjacent blocks and standard blocks.
Preferably, in the step (3), the segment is transported to a segment trolley after being dismantled.
A duct piece dismantling tool used in the duct piece dismantling construction method comprises a support frame, a duct piece assembling machine and an assembling machine power system, and can walk and rotate in an annular direction by 360 degrees.
Preferably, the device further comprises a remote control device for realizing remote control removal of the duct piece.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the duct piece removing tool does not need to damage duct pieces, after the duct piece bolts are detached, the duct pieces are removed and then are transported to the duct piece trolley, and the duct pieces are sequentially removed without being damaged, so that the damage to the duct pieces is avoided.
2. The invention is mechanical duct piece removing, different from manual duct piece removing, a scaffold or a platform is needed to be erected for manual duct piece removing, high-altitude operation risks exist, the duct piece is drilled and removed at the high altitude, mechanical damage is easy to cause, the mechanical duct piece removing can be realized through a duct piece mounting machine remote control device, and the risk of manual duct piece removing is avoided.
3. The invention can achieve the purpose of rapidly and nondestructively removing the duct piece, on one hand, the construction period is saved, the influence of delaying the shield process and the influence on the station construction are reduced, on the other hand, the removed duct piece can be reused, 360-ring duct piece production cost can be saved, and about 780 ten thousand yuan is saved.
4. The invention has great popularization significance, and the technology can be adopted for projects similar to shield tunneling before and after.
Drawings
Fig. 1 is a schematic view of a duct piece reinforced longitudinal section at the interface position of the present invention.
Fig. 2 is a schematic cross-sectional view of the tube sheet reinforcement at the interface location of the present invention.
Fig. 3 is a plan view of a tube sheet support of the present invention.
Fig. 4 is a schematic view of the removal of the duct piece according to the present invention.
FIG. 5 is a schematic view of a plate with holes.
Fig. 6 is a schematic diagram of the advancing of the mounting machine in the segment removal tool of the invention.
In the figure, 1 is a duct piece at the interface position, 2 is 20# a I-steel, 3 is H175I-steel, 4 is a reserved hole, 5 is a K block, 6 is an adjacent block, 7 is a standard block, 8 is a duct piece, 9 is a mounting machine, and 10 is a front trailer frame.
Detailed Description
The following examples are intended to illustrate the present invention in detail and should not be construed as limiting the scope of the present invention in any way.
Example 1: a tunnel-first and station-later underground excavation station segment dismantling construction method is disclosed, referring to the figures 1-3, and comprises the following steps:
(1) full-ring grouting for duct piece 1 at joint position
In order to prevent the back of the duct piece 1 at the interface position from being loosely filled and prevent mud burst and water burst during dismantling, a double-liquid grouting machine is specially adopted to continuously perform 3-ring construction on the duct piece 1 at the interface position between a station and a shield interval to form a closed ring, and double-liquid grouting is adopted to prevent abnormity during dismantling of the duct piece. The cement paste ratio is: the water glass =1:1, the grouting sequence is from bottom to top, the hole grouting is staggered, the grouting pressure and the grouting amount are strictly controlled in the grouting process, and the duct piece is prevented from being staggered and damaged.
(2) Duct piece 1 support reinforcement at interface position
And reinforcing the tunnel at the hole by adopting 20# a I-steel 2, wherein the reinforcing range is 6 rings of the tunnel part at the joint position of the station and the tunnel. The shield constructs to add the steel sheet cushion to the hoop between interim support and shield structure section of jurisdiction, establishes 10mm rubber pad between steel sheet and section of jurisdiction, ensures not destroying the section of jurisdiction. In order to prevent the integral instability and collapse of the duct piece when the duct piece is removed, a support frame is additionally arranged at the joint position, the support frame is made of H175I-shaped steel 3, the number of the support frames is 6 in total, a flexible support cushion is adopted at the position in contact with the duct piece,
(3) segment removal
When the station negative two-layer excavation is carried out, earthwork between tunnels is excavated in advance, and the number of segments is increased, so that the adjacent empty surface is removed. And (3) changing a segment mounting machine tool, and mechanically removing the segment 8 by using the tool after excavating the earth on the top of the tunnel. The tool mainly comprises a self-made support frame, a segment erector and an assembling machine power system (a hydraulic pump station). The segment removing equipment adopts an autonomous research and development segment removing tool, and is provided with walking, annular 360-degree rotation and independent complete equipment. When the duct piece 8 is removed, firstly, the duct piece bolts are sequentially removed from top to bottom, namely the K block 5, the adjacent block 6 and the standard block 7, and the removing sequence is shown in figure 4.
Need not to destroy section of jurisdiction 8 with the section of jurisdiction erector after transforming, unload the section of jurisdiction bolt after, transport to the section of jurisdiction dolly after demolising the section of jurisdiction, demolish the section of jurisdiction in proper order and can not cause the section of jurisdiction damaged to the damage to section of jurisdiction 8 has been avoided. The segment can be dismantled quickly and nondestructively, so that the construction period is saved, the influence of delaying the shield process and the influence on station construction are reduced, the segment after being dismantled can be reused, the production cost of the segment with 360 rings can be saved, and the number of units is about 780 ten thousand yuan. The method has great popularization significance, and the technology can be adopted for projects similar to shield tunneling and then standing.
Example 2: a tunnel-first and station-later underground excavation station segment dismantling construction method is disclosed, referring to fig. 5, and is different from embodiment 1 in that: in the duct piece dismantling step, a phi 80mm hole is reserved at the corresponding position below the middle plate during construction, and the reserved hole 4 can be simultaneously used as a feeding hole for later-stage rail top air duct construction. And (3) installing a lifting hook by utilizing the reserved hole 4, removing the pipe piece by adopting a chain block, and supporting by utilizing a temporary support in the tunnel when the pipe piece is removed.
Example 3: a tunnel-first station and station-later station underground excavation station segment dismounting tool is shown in figure 6 and comprises a mounting machine 9 and a front trailer frame 10. The mounting machine 9 is provided with a hydraulic pump station for controlling the mounting machine to walk and rotate in the circumferential direction by 360 degrees. The invention is used for mechanically removing the duct piece, and the duct piece can be removed remotely through the duct piece mounting machine remote control device, so that the risk of manually removing the duct piece is avoided.
While the present invention has been described in detail with reference to the drawings and the embodiments, those skilled in the art will understand that various changes and modifications can be made to the specific parameters in the embodiments without departing from the spirit of the present invention, and it is intended that all of the embodiments are within the scope of the present invention and will not be described in detail herein.
Claims (10)
1. A tunnel-first and station-later underground excavation station segment dismantling construction method is characterized by comprising the following steps:
(1) performing full-circle grouting on duct pieces at the interface position between a station and a shield interval;
(2) reinforcing the duct piece at the interface position;
(3) and after earthwork at the top of the tunnel is dug, removing the duct piece at the interface position by using a duct piece removing tool, firstly removing a duct piece bolt, and then removing the K block, the adjacent block and the standard block from top to bottom respectively.
2. The tunnel-first post-station subsurface excavated station segment demolition construction method according to claim 1, wherein in the step (1), a double-liquid grouting machine is adopted to continuously and three-annularly apply the segment at the interface position as a closed ring, and double-liquid slurry is injected.
3. The tunnel-first post-station underground excavation station segment dismantling construction method as claimed in claim 2, wherein the double-liquid-slurry components are cement slurry and water glass, and the grouting sequence is from bottom to top, and staggered hole-opening grouting is performed.
4. The tunnel-first post-station underground excavation station segment dismantling construction method according to claim 1, characterized in that in the step (2), I-shaped steel is adopted to reinforce the segment at the interface position, and the reinforcing range is six rings of a tunnel part at the joint position of the station and the tunnel.
5. The tunnel-ahead and post-station underground excavation station segment dismantling construction method as claimed in claim 1, wherein in the step (2), a shield circumferential direction is provided with a steel plate cushion block between the temporary support and the shield segment, and a rubber pad is provided between the steel plate and the segment.
6. The tunnel-first post-station subsurface excavated station segment demolition construction method as claimed in claim 1, wherein in the step (2), a support frame is arranged at the interface position, the support frame has a three-ring end and six rings in total, the support frame is made of I-steel, and a flexible support cushion is arranged at a position in contact with the segment at the interface position.
7. The tunnel-first post-station subsurface excavated station segment removal construction method as claimed in claim 1, wherein in the step (3), a hole is reserved at a corresponding position below the middle plate during construction, a hook is installed by using the reserved hole, segments are removed one by using a chain block, and the segments are supported by a temporary support in the tunnel during removal.
8. The tunnel-followed station subsurface excavated station segment demolition construction method as claimed in claim 1, wherein in the step (3), the segment is transported to the segment trolley after being demolished.
9. A duct piece removing tool used in the duct piece removing construction method of claim 1 is characterized by comprising a support frame, a duct piece assembling machine and an assembling machine power system, and the duct piece removing tool can walk and rotate in an annular direction for 360 degrees.
10. The segment removal tool according to claim 9, further comprising a remote control device for remotely removing the segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010968004.4A CN111997649A (en) | 2020-09-15 | 2020-09-15 | Tunnel-first post-station underground excavation station segment removal construction method and segment removal tool used by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010968004.4A CN111997649A (en) | 2020-09-15 | 2020-09-15 | Tunnel-first post-station underground excavation station segment removal construction method and segment removal tool used by same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111997649A true CN111997649A (en) | 2020-11-27 |
Family
ID=73468631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010968004.4A Pending CN111997649A (en) | 2020-09-15 | 2020-09-15 | Tunnel-first post-station underground excavation station segment removal construction method and segment removal tool used by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111997649A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796783A (en) * | 2021-01-13 | 2021-05-14 | 中铁六局集团有限公司 | Construction method for dismantling inner pipe sheet of shield tunneling through underground excavation in advance |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2225659A1 (en) * | 1971-12-03 | 1973-06-07 | Commercial Shearing | TUNNEL LINING |
| US4946309A (en) * | 1985-01-26 | 1990-08-07 | Phoenix Aktiegesellschaft | Sealing profile |
| CN101251015A (en) * | 2008-04-02 | 2008-08-27 | 上海隧道工程股份有限公司 | Construction method for exchanging shield ventral brush |
| CN101435334A (en) * | 2008-12-16 | 2009-05-20 | 上海隧道工程股份有限公司 | In-and-out hole segment pipe sheet connecting structure of shield method and construction method thereof |
| CN102094649A (en) * | 2011-02-17 | 2011-06-15 | 乐贵平 | Method for constructing underground space by shield-shallow buried covered excavation composite method |
| CN105041349A (en) * | 2015-07-26 | 2015-11-11 | 北京工业大学 | Underground excavation construction method for expanded excavation of station on basis of metro regional shield tunnel |
| CN110608057A (en) * | 2019-10-11 | 2019-12-24 | 中铁隧道集团二处有限公司 | Device for removing duct piece in shield tunnel and using method thereof |
-
2020
- 2020-09-15 CN CN202010968004.4A patent/CN111997649A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2225659A1 (en) * | 1971-12-03 | 1973-06-07 | Commercial Shearing | TUNNEL LINING |
| US4946309A (en) * | 1985-01-26 | 1990-08-07 | Phoenix Aktiegesellschaft | Sealing profile |
| CN101251015A (en) * | 2008-04-02 | 2008-08-27 | 上海隧道工程股份有限公司 | Construction method for exchanging shield ventral brush |
| CN101435334A (en) * | 2008-12-16 | 2009-05-20 | 上海隧道工程股份有限公司 | In-and-out hole segment pipe sheet connecting structure of shield method and construction method thereof |
| CN102094649A (en) * | 2011-02-17 | 2011-06-15 | 乐贵平 | Method for constructing underground space by shield-shallow buried covered excavation composite method |
| CN105041349A (en) * | 2015-07-26 | 2015-11-11 | 北京工业大学 | Underground excavation construction method for expanded excavation of station on basis of metro regional shield tunnel |
| CN110608057A (en) * | 2019-10-11 | 2019-12-24 | 中铁隧道集团二处有限公司 | Device for removing duct piece in shield tunnel and using method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 方俊波等: "高速铁路水下泥水盾构洞中解体及运输技术", 《建筑机械化》 * |
| 钟育刚: "盾构先行过站对地铁车站施工的影响及处理措施", 《山西建筑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796783A (en) * | 2021-01-13 | 2021-05-14 | 中铁六局集团有限公司 | Construction method for dismantling inner pipe sheet of shield tunneling through underground excavation in advance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108691550B (en) | Vertical shaft shield machine for underground upward construction and construction method thereof | |
| WO2020173100A1 (en) | Reinforcement apparatus and construction method for local freezing reinforcement of deep foundation pit in water-rich sand gravel stratum | |
| CN111396067B (en) | Comprehensive shield steel sleeve receiving construction method in complex environment | |
| CN110924961B (en) | Construction method for starting shield tunneling machine to pass through existing station | |
| CN113153308B (en) | Construction method for collapse section of double-arch tunnel | |
| CN105201518A (en) | Method for receiving and disassembly of large-diameter slurry balance shield in hole | |
| CN111997649A (en) | Tunnel-first post-station underground excavation station segment removal construction method and segment removal tool used by same | |
| KR101437443B1 (en) | Pressure apparatus for boring tunnel | |
| KR100360560B1 (en) | Shield Tunneling Apparatus and Method | |
| CN113374480A (en) | Dismantling and well-exiting process for well drilling equipment of vertical shaft heading machine | |
| CN110056362B (en) | Shield receiving and lateral translation hoisting method in air duct of underground excavation station | |
| CN203891047U (en) | Equipment equipped with steel platform for foundation construction of land bridge | |
| CN112796783B (en) | Construction method for dismantling shield through underground excavation tunnel inner pipe sheet in advance | |
| CN110985017B (en) | Construction method for shield tunneling of rainwater box culvert under expansive soil stratum | |
| JP3815731B2 (en) | Promotion tunnel removal / backfill method | |
| KR100362810B1 (en) | Shield tunneling apparatus and method | |
| RU2502873C1 (en) | Shaft lining, complex for its erection and method of its erection | |
| CN112483126A (en) | Construction method of underground excavation air duct of composite stratum with upper soft part and lower hard part | |
| KR101437439B1 (en) | Apparatus for boring tunnel | |
| CN218293602U (en) | Demolish frock to shield earlier and expand tunnel segment of digging | |
| CN113669084B (en) | Lake facies deposition weak stratum subway tunnel-first and station-last segment dismantling method | |
| CN210660091U (en) | Device for preventing building from settling during construction of underground excavation tunnel | |
| CN214273663U (en) | Weak surrounding rock tunnel geological disaster punishment structure | |
| CN117090584A (en) | Construction method of small-section tunnel in gravel stratum | |
| Ogasawara et al. | Removal of the utility tunnel by shield method to build the underground expressway |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201127 |