CN208330410U - A kind of Tunnel Passing crushed zone canopy protection structure - Google Patents
A kind of Tunnel Passing crushed zone canopy protection structure Download PDFInfo
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- CN208330410U CN208330410U CN201820905933.9U CN201820905933U CN208330410U CN 208330410 U CN208330410 U CN 208330410U CN 201820905933 U CN201820905933 U CN 201820905933U CN 208330410 U CN208330410 U CN 208330410U
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Abstract
The utility model discloses a kind of Tunnel Passing crushed zone canopy protection structures, belong to engineering construction technology field.The structure includes canopy protection structure operating room (1), it is oriented to wall (2), operating platform (3), directional drilling system (4), canopy protection structure steel pipe (5), shaped steel arch (6) and orientation grouting system (7)；Rod boring situation can be monitored in real time in directional drilling technique, drill bit drilling direction is adjusted according to drilling situation, to achieve the purpose that accurate pointing.Orientation slurry injection technique can real-time monitoring be reinforced interlayer pressure and slip casting overpressure between soil layer and Grouting Pipe, achieve the purpose that real-time monitoring, and can ensure slip casting effect, without there is a phenomenon where excessive slip casting or falling flat.In construction, the environmental pollution of strict control construction site, noise pollution provides safeguard for green construction.
Description
Technical field
The utility model is a kind of Tunnel Passing crushed zone canopy protection structure, is related to engineering construction technology field.
Background technique
It, can due to the complexity and unstability of country rock when Tunnel Passing crushed zone or the interior macroscopic-void for having deposit
Tunnel cave can be will cause, seriously threaten the safety of engineering.To avoid the generation of accident from generally using steel tube shed leading pre-supporting
Method construction, daguanpeng construction can effectively inhibit wall rock loosening and collapse, however when passing through crushed zone, existing steel tube shed technology
There are the following problems:
(1) due to passing through crushed zone stratum when, gravelly soil complicated component, with a large amount of silt particles, partially aqueous amount is larger, viscous
Property it is strong, drilling process, which is easy to appear to embrace to bore phenomenon, collapse hole and bit freezing phenomenon and run, bores phenomenon etc., highly impacts construction matter
Amount and safety.
(2) in pipe boron steel pipe slip casting, due to the complicated multiplicity of rock property, cause slip casting rear slurry cannot be uniformly in pipe
Canopy surrounding set forms stable protective layer, thereby reduces the stability of steel tube shed.
Utility model content
The utility model provides a kind of novel canopy protection structure and method for protecting support, can the above-mentioned steel pipe drilling of effective solution and note
Slurry problem, safe passes through crushed zone.
The technical solution adopted in the utility model is a kind of Tunnel Passing crushed zone canopy protection structure, which includes canopy shield knot
Structure operating room (1) is oriented to wall (2), operating platform (3), directional drilling system (4), canopy protection structure steel pipe (5), shaped steel arch (6)
With orientation grouting system (7)；Guiding wall (2) is along the arch wall of tunnel direction setting, and canopy protection structure operating room (1) is mounted on guiding
On wall (2), operating platform (3) setting is in guiding wall (2)；Canopy protection structure steel pipe (5) is arranged in canopy protection structure operating room (1)
Top, shaped steel arch (6) setting are arranged in the bottom of canopy protection structure steel pipe (5), directional drilling system (4) in operating platform (3)
On, orientation grouting system (7) is arranged at the mounting hole of canopy protection structure steel pipe (5).It is equipped between shaped steel arch (6) longitudinally connected
Reinforcing bar (11).
Directional drilling system (4) includes guide plate (4.1), hydrophthalmia (4.2), direction sensor (4.3), wireless detector
(4.4)；Direction sensor (4.3) is arranged in the front end groove of guide plate (4.1), before wireless detector (4.4) is also disposed at
It holds in groove, hydrophthalmia (4.2) setting is internal in guide plate (4.1).
Orienting grouting system (7) includes slurries vectored injection system and purpose monitoring system.Slurries vectored injection system packet
Include drilling tool and grouting port (7.1.1), high-pressure slip-casting pipe (7.1.2) and slurry injection nozzle (7.1.3)；
Purpose monitoring system, including terminal (7.2.2), data line (7.2.1), tool joint (7.2.3),
It detects bar (7.2.4), detects end (7.2.5) and pressure sensor (7.2.6)；Terminal (7.2.2) passes through data
Transmission line (7.2.1) is connect with pressure sensor (7.2.6), and pressure sensor (7.2.6) is laid in high-pressure slip-casting pipe (7.1.2)
On, drilling tool and grouting port (7.1.1) are arranged at the center of drilling, drilling tool and grouting port (7.1.1) and high-pressure slip-casting pipe
(7.1.2) connection, slurry injection nozzle (7.1.3) are arranged on high-pressure slip-casting pipe (7.1.2)；
Tool joint (7.2.3), detection bar (7.2.4) and detection end (7.2.5) are sequentially connected with composition detecting structure, visit
Parallel arrangement guarantees slip casting orientation, tool joint (7.2.3) and drilling tool and slip casting vertically by geodesic structure and high-pressure slip-casting pipe (7.1.2)
The position of mouth (7.1.1) is corresponding.
High-pressure slip-casting pipe (7.1.2) is glass reinforced plastic pipe.
Canopy protection structure operating room (1) is the work-yard that canopy protection structure performs, and canopy protection structure operating room (1) includes operating room
Excavation and supporting, wherein being excavated more straight than normal tunnel first in a certain range of tunnel tunnel face arch (including vault and haunch)
Diameter extends out certain distance D (D generally take first Zhi Houdu two times), and the length that operating room is excavated is determined according to the every section of steel pipe is long, peace
Steel loading arch, and initial support is carried out, it is formed canopy protection structure operating room (1).
Guiding wall (2) is the arch wall in guide tunnel direction, the pre-buried canopy protection structure guide pipe in the inside and guiding steelframe, as canopy
The direction of protection structure construction.Arch and template, installation guiding steelframe and guide pipe are first found when guiding wall (2) performs, then are filled
Note concrete is formed.To guarantee canopy protection structure construction precision, guiding wall (2) is interior to set I-steel, and steelframe peripheral hardware is oriented to steel pipe, and
There are a certain range of outer limb α, α to be determined according to canopy protection structure length, be 1 °~3 °, steel pipe and steelframe weld.Each list of steelframe
Member is by connecting plate welding fabrication, by being bolted between unit.
Operating platform (3) is built after the completion of guiding wall (2) performs, and first drilling machine nose girder is fixed on bracket, is passed through
Support rod is adjusted to adjust the inclination angle of nose girder, meets canopy protection structure design inclination angle needs.Drilling machine is fixed on nose girder again, is worked
Platform build and install must securely, stablize, guarantee work progress safety, prevent in construction that rig vibration is excessive shifts
And inclination, influence canopy protection structure bore angle.
Directional drilling system (4) includes wedging bit and display two parts.Wedge drill bit is provided with direction sensor, side
To sensor internal installation force sensing element when bit location changes, incudes gravity center shift, drill bit drilling direction information is passed through
Wireless connection is sent to display.Display shows inclination angle and the tool angle of drill bit, has an angle pilot clock, wedge on display
Plate inclined-plane downward when be 12 points.Drill bit can be transferred at 12 points if drill bit dilling angle is on the lower side, i.e., clapboard inclined-plane downward, directly
Jacking is connect, towing force big, upward by one due to clapboard bottom board inclined plane area at this time, bit course will migrate upward.
Similarly, at 6, correction can make drill bit drilling trace downward, 9 points, 3 whens respectively left and right correction direction.If angle
Properly, drilling machine at the uniform velocity rotary drilling, the drilling trace of drill bit are straight.
Canopy protection structure steel pipe (5) includes the selection of steel pipe and the jacking of steel pipe；The selection of steel pipe, steel pipe caliber use caliber
ForSeamless steel pipe,For 89mm~150mm, the length of section is protected according to canopy and construction technology determines, when needing to increase steel pipe
When strength and stiffness, steel reinforcement cage is set in steel pipe and is then filled with cement mortar, the intensity of reinforcement canopy pipe structure.Steel reinforcement cage by
Four main reinforcements and fixed ring composition.The jacking of steel pipe, the section jacking of steel pipe jacking time-division, every section of length of steel pipe is L, and L is according to single
It recycles canopy protection structure length to determine, is 3m~5m, screwed connection is used between steel pipe and steel pipe.
Shaped steel arch (6) is that strata pressure and restrained deformation are undertaken before gunite concrete is not up to desired strength, is mentioned
The ability of high preliminary bracing, it is both a part of temporary support and permanent support.Shaped steel arch (6) uses I-steel, often
Steel plate is welded to connect at Pin I-steel two ends, bracing members are all made of two-sided welding.The steel arch-shelf processed is in smooth place
On carry out that examination is assembled, and control plane warping should be less than B (B 5mm), assembly tolerance in periphery be C (C is ± 30mm).Steel arch
It is tethered and is connect with flange valve snail between frame and steel arch-shelf, and the junction of the edges of two sheets of paper welds, longitudinal to be connected using reinforcing bar, circumferential direction is carried out using dowel
Connection, welding use welding by both sides, it is ensured that and it is longitudinally connected to be connected firmly with arch, it constitutes whole.
It orients grouting system (7), including slurries vectored injection system and purpose monitoring system.Slurries vectored injection system,
It will be prepared by design requirement in slurries implantation glass steel high-pressure slip-casting pipe (7.1.2) by drilling tool and grouting port (7.1.1), slurries
Under pressure, it is sprayed by the slurry injection nozzle (7.1.3) of high-pressure slip-casting pipe (7.1.2) tube wall into the crack of crushed zone, slurry
Liquid is squeezed into the crack of crushed zone and is solidified, to have the function that reinforce country rock.
Purpose monitoring system, including terminal (7.2.2), data line (7.2.1), detection bar (7.2.4), are visited
Survey end (7.2.5) and pressure sensor (7.2.6), in slip casting can real-time monitoring be reinforced country rock and Grouting Pipe
Between interlayer pressure and slip casting overpressure, according to acquisition data situation adjust grouting pressure, grouting amount parameter at any time.
Novel canopy protection structure and method for protecting support provided by the utility model, have the advantage that directional drilling technique can
With real-time monitoring rod boring situation, drill bit drilling direction is adjusted according to drilling situation, to achieve the purpose that accurate pointing.It is fixed
To slurry injection technique can real-time monitoring be reinforced interlayer pressure and slip casting overpressure between soil layer and Grouting Pipe, reach real-time
The purpose of monitoring, and can ensure slip casting effect, without there is a phenomenon where excessive slip casting or falling flat.This reality
With novel in construction, the environmental pollution of strict control construction site, noise pollution provides safeguard for green construction.
Detailed description of the invention
Fig. 1 is to pass through crushed zone canopy protection structure skiagraph.
Fig. 2 is the layout drawing of canopy protection structure shaped steel arch.
Fig. 3 is drill bit schematic diagram.
Fig. 4 is display schematic diagram.
Fig. 5 is canopy protection structure steel pipe schematic diagram.
Fig. 6 canopy shield construction orientation grouting system.
Specific embodiment
Now case is combined to introduce specific embodiment of the present utility model with reference to the accompanying drawings, attached drawing is schematic diagram, only with signal
Mode illustrates that the basic structure of the utility model, specific implementation step are as follows:
(1) (a) according to tunnel axis and excavation contour line, the fashioned iron arch that two Pin are oriented to portion within the walls guiding wall construction: is installed
Frame, shaped steel arch spacing 60cm, and with guiding wall firm welding.(b) positioned with total station, install canopy protection structure guide pipe and
It is oriented to steelframe, guide pipe is the steel pipe of Ф 140mm wall thickness 5mm, the guide pipe gradient is checked with slope ruler, according to 1~3 ° of outer limb
It is accurately positioned, and guide pipe and guiding steelframe is securely welded as a whole with shaped steel arch with connection reinforcing bar.(c) it is led through detection
After meeting required precision to pipe and guiding steelframe, internal model arch is installed, internal model arch is formed with two Pin section steel manufactures, and support is firm
Afterwards, outboard template is installed on the outside of mould bases.(d) guiding wall is poured, guiding wall uses C25 concrete, sectional dimension 2.0m × (1+
3)m.(e) after the completion of guiding wall pours, slope surface is faced upward around injection 15cm thickness C25 concrete closing, wall for grouting when as slip casting.(f)
The form removal after concrete strength satisfaction.
(2) operation platform positioning and drilling: (a) drilling machine platform is set up with the steel pipe scaffold of Ф 48mm, sets up platform one
Secondary property is put up, and drilling is carried out from 1~2 bench drill machine from high hole location to low hole location.Operation platform will be supported on firm ground, foot hand
Frame connection will securely, stablize, prevent when applying brill drilling machine generate uneven subsidence, swing, displacement and influence drilling quality.(b)
Drilling machine requires parallel with the orifice tube direction set when drilling machine positions, and accurately appraises and decides drilling machine position.With total station, hanging wire,
Drilling rod is oriented to the method combined, adjusts repeatedly, it is ensured that borer drill rod axis matches with orifice tube axis.(c) for the ease of
Steel pipe is installed, bit diameter is identical as steel pipe sizes using Φ 108mm.Before drilling, the accurate plan-position for measuring hole, inclination angle,
Outer limb, and each hole is numbered.According to the inclination angle and direction of orifice tube, accurately determined using the extension of drilling rod and sash weight
The direction of drilling can fix drilling machine.Drill the elevation angle determination should depending on drilling depth and drilling rod intensity, 1 ° of general control~
3°.Using the varied angle oil cylinder of drilling machine, the inclination angle of drilling machine is determined referring to the inclination angle of guide pipe, it is ensured that drill-rod wire and blowing angle one
It causes, to reach the guiding role of drilling.Drilling speed is not easy too fast when perforation of boring machine, is transferred to normal drilling rate after boring deep 20 ㎝.First segment
Drilling stops when drilling rod pierces rock stratum tail portion 20~30 ㎝ of residue, and with the artificial clamping drilling rod of pipe wrench, drilling machine low speed and reverse is disengaged and bored
Bar, drilling machine retract original position along guide rail, second drilling rod are manually packed into, and install coupling sleeve in drilling rod front end, after the alignment of direction
It is coupled integral.After drilling reaches depth requirements, dismounting drilling rod, drilling machine retract original position in the same way.When changing drilling rod, inspection is paid attention to
It looks into whether drilling rod is bent, has not damaged, whether central water spray hole is smooth, and undesirable timely replacement is to ensure normally to make
Industry.(d) in drilling process using wedging bit as guide plate, wedging bit is provided with direction sensor, in direction sensor
Force sensing element is installed when bit location changes by portion, the variation of its center of gravity is incuded, by drill bit drilling direction information by wirelessly connecting
It connects and is sent to display.Display shows that (there are an angle pilot clock, clapboard inclined-plane in the inclination angle of drill bit and tool angle on display
It is 12 points when downward).If drill bit dilling angle is on the lower side can be transferred to drill bit at 12 points, i.e. clapboard inclined-plane downward, directly pushes up
Into towing force big, upward by one due to clapboard bottom board inclined plane area at this time, bit course will migrate upward.Similarly,
At 6, correction can make drill bit drilling trace downward, 9 points, 3 whens respectively left and right correction direction.If angle is suitable,
Drilling machine at the uniform velocity rotary drilling, the drilling trace of drill bit are straight, thus to realize directional drilling.(e) it conscientiously performs and crept into
The original record of journey carries out geology judgement, description, the ginseng of Advance geological prediction and forecast when as tunnel cutting to aperture landwaste in time
Data is examined, tunnel cutting is instructed.
(3) production of canopy pipe and installation: (a) canopy protection structure steel pipe uses outer diameter 108mm, the hot rolled seamless steel tube of wall thickness 6mm
Upper welding wing plate, overall length 30m (length of steel pipe is determining according to cyclic advance length scene, but section length is no more than 50m), segmentation
Connection, every section of 3m long, joint screwed connection, nozzle screw thread vehicle depth are 6cm female thread, and connecting tube usesIt is seamless
Steel pipe, the long 12cm of pin thread.Canopy pipe tail portion reserves 1m as only slurry section, remaining position of steel pipe and beats injected hole, injected hole aperture 16mm,
Injected hole pitch of holes 15cm, quincuncial arrangement.(b) loading machine jacking steel pipe under hand fit is used, the connector of adjacent steel pipe is answered
Front and back is staggered 1.5m, and first penstock installation manually loads onto later section steel pipe on guiding wall, manually holds chain wrench and carries out steel pipe connection
It connects, joins two section steel pipes in connection place together, successively head into.
(4) shaped steel arch production and installation: (a) I-steel arch uses 20b I-steel, welds at every Pin I-steel two ends
The junction steel plate of 220 × 220 × 10mm is connect, bracing members are all made of two-sided welding, and throat thickness is not less than 5mm.The steel processed
Arch carries out examination assembly on smooth place, and control plane warping should be less than 20mm, and assembly tolerance in periphery is ± 30mm.
Check whether solder joint meets code requirement, if solder skip；It is satisfactory to number, it avoids using with.(b) steel arch-shelf and steel arch-shelf
Between tethered and connect with flange valve snail, and the junction of the edges of two sheets of paper welds, longitudinal to useReinforcing bar connection, spacing 60cm, circumferential direction use 1m
Dowel be attached, welding use welding by both sides, it is ensured that it is longitudinally connected to be connected firmly with arch, constitute integrally.(c) steel arch-shelf
It bending and is bent using forming mill, fashioned iron connection, which can be used 20cm*h thickness 1cm steel plate and tie up item, to be fully welded, and h is that fashioned iron height subtracts 4cm,
First fashioned iron butt welding should be expired before tying up item weldering, it is ensured that wait strong ties.Junction steel plate thickness, size, jewel hole have to comply with requirement, institute
There is throat depth to cannot be less than design thickness, and weld seam is full.Bracing members are welded with anchor pole head and steel mesh as far as possible, to reinforce
Combined supporting effect.
(5) for the bending resistance and impact resistance for increasing canopy protection structure, steel fabrication of reinforcing cage and installation: is set in steel pipe
Muscle cage carries out reinforcement to structure, is made of four Φ 22mm reinforcing bars and fixed ring, with loading machine jacking under hand fit.
(6) slip casting and protective layer construction: (a) before slip casting face must first element spray one layer concrete as wall for grouting, it is right
Face is closed, it is ensured that slip casting process not spillage；Tube shed grouting mode uses intermittent slip casting, i.e. two Kong Huankong of machine note
Slurry.(b) slip casting is oriented pipe canopy using orientation grouting system, including slurries vectored injection system and purpose monitoring system
Slip casting and monitoring.(c) intermittent time is not more than 1.5 hours, and slurries is allowed to have certain setting time, prevents continuous grouting process from starching
Liquid is spread without limitation.(d) grouting sequence is the first low hole Kong Hougao, is marked with water hole after first infusing no water hole, from two arch springings to vault pair
Claim to carry out.(e) slip casting standard is that tunnel structure protective layer thickness meets design requirement, and single-pipe grouting amount reach design value or
Grouting pressure reaches final pressure and pressure stabilizing 20 minutes or more, no longer stops slip casting into slurry in hole.(f) it is closed in time after slip casting
Grouting stop-valve checks that aperture, adjacent hole, whether there is or not grout leaking phenomenons at coating relatively thin position stops immediately when grout leaking occurs during slip casting
The hole slip casting blocks grout leaking mouth using intermittent slip casting, is spaced a hole or number hole slip casting, also uses the dimity, timber wedge, quick-hardening cement
Mortar or Anchor Agent block, and are further continued for slip casting when no longer grout leaking, and pressure such as increases suddenly during slip casting, then may generation
Shutdown inspection is answered in plugging.
(7) circulation construction: with every inside propulsion 30m for a cyclic advance unit, cyclic advance is determined by scene, but is segmented
Of length no more than 50m, longitudinal two groups of canopy protection structures circulation lap of splice is not less than 3.0m, until being fully completed end.
Claims (2)
1. a kind of Tunnel Passing crushed zone canopy protection structure, it is characterised in that: the structure includes canopy protection structure operating room (1), guiding
Wall (2), operating platform (3), directional drilling system (4), canopy protection structure steel pipe (5), shaped steel arch (6) and orientation grouting system
(7)；Guiding wall (2) is the arch wall along the setting of tunnel direction, and canopy protection structure operating room (1) is mounted in guiding wall (2), and operation is flat
Platform (3) setting is in guiding wall (2)；Canopy protection structure steel pipe (5) is arranged in the top of canopy protection structure operating room (1), shaped steel arch
(6) setting is arranged on operating platform (3) in the bottom of canopy protection structure steel pipe (5), directional drilling system (4), orients slip casting system
(7) setting unite at the mounting hole of canopy protection structure steel pipe (5)；Longitudinally connected reinforcing bar (11) are equipped between shaped steel arch (6)；
Directional drilling system (4) includes guide plate (4.1), hydrophthalmia (4.2), direction sensor (4.3), wireless detector (4.4)；
Direction sensor (4.3) is arranged in the front end groove of guide plate (4.1), and wireless detector (4.4) is also disposed at front end groove
In, hydrophthalmia (4.2) setting is internal in guide plate (4.1)；
Orienting grouting system (7) includes slurries vectored injection system and purpose monitoring system；Slurries vectored injection system includes boring
Tool and grouting port (7.1.1), high-pressure slip-casting pipe (7.1.2) and slurry injection nozzle (7.1.3)；
Purpose monitoring system, including terminal (7.2.2), data line (7.2.1), tool joint (7.2.3), detection
Bar (7.2.4) detects end (7.2.5) and pressure sensor (7.2.6)；Terminal (7.2.2) is transmitted by data
Line (7.2.1) is connect with pressure sensor (7.2.6), and pressure sensor (7.2.6) is laid on high-pressure slip-casting pipe (7.1.2),
Drilling tool and grouting port (7.1.1) are arranged at the center of drilling, drilling tool and grouting port (7.1.1) and high-pressure slip-casting pipe (7.1.2)
Connection, slurry injection nozzle (7.1.3) are arranged on high-pressure slip-casting pipe (7.1.2)；
Tool joint (7.2.3), detection bar (7.2.4) and detection end (7.2.5) are sequentially connected with composition detecting structure, detection knot
Parallel arrangement guarantees slip casting orientation, tool joint (7.2.3) and drilling tool and grouting port vertically by structure and high-pressure slip-casting pipe (7.1.2)
The position of (7.1.1) is corresponding.
2. a kind of Tunnel Passing crushed zone canopy protection structure according to claim 1, it is characterised in that: high-pressure slip-casting pipe
(7.1.2) is glass reinforced plastic pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820905933.9U CN208330410U (en) | 2018-06-12 | 2018-06-12 | A kind of Tunnel Passing crushed zone canopy protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820905933.9U CN208330410U (en) | 2018-06-12 | 2018-06-12 | A kind of Tunnel Passing crushed zone canopy protection structure |
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| Publication Number | Publication Date |
|---|---|
| CN208330410U true CN208330410U (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820905933.9U Active CN208330410U (en) | 2018-06-12 | 2018-06-12 | A kind of Tunnel Passing crushed zone canopy protection structure |
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| Country | Link |
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| CN (1) | CN208330410U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547644A (en) * | 2018-06-12 | 2018-09-18 | 北京市政路桥股份有限公司 | A kind of Tunnel Passing crushed zone canopy protection structure and method for protecting support |
-
2018
- 2018-06-12 CN CN201820905933.9U patent/CN208330410U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547644A (en) * | 2018-06-12 | 2018-09-18 | 北京市政路桥股份有限公司 | A kind of Tunnel Passing crushed zone canopy protection structure and method for protecting support |
| CN108547644B (en) * | 2018-06-12 | 2024-01-05 | 北京市政路桥股份有限公司 | Tunnel crossing crushing belt shed protection structure and supporting method |
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Lv Jia Inventor after: Deng Hongliang Inventor after: Sun Ximeng Inventor after: Ma Rui Inventor after: Deng Bo Inventor after: Wang Liwei Inventor after: Zhang Tao Inventor after: Jia Huiwen Inventor after: Li Xiaogang Inventor after: Hao Gang Inventor before: Lv Jia Inventor before: Deng Hongliang Inventor before: Sun Ximeng Inventor before: Ma Rui Inventor before: Deng Bo Inventor before: Wang Liwei Inventor before: Zhang Tao Inventor before: Jia Huiwen Inventor before: Li Xiaogang Inventor before: Hao Gang |
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| CB03 | Change of inventor or designer information |