CN109778862A - A kind of construction method quantitatively controlling grouting amount - Google Patents
A kind of construction method quantitatively controlling grouting amount Download PDFInfo
- Publication number
- CN109778862A CN109778862A CN201910154076.2A CN201910154076A CN109778862A CN 109778862 A CN109778862 A CN 109778862A CN 201910154076 A CN201910154076 A CN 201910154076A CN 109778862 A CN109778862 A CN 109778862A
- Authority
- CN
- China
- Prior art keywords
- grouting pipe
- injected hole
- grouting
- grout
- sealing element
- 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
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of construction methods that can quantitatively control grouting amount, the steps include: 1. to bore injected hole and are inserted into Grouting Pipe；2. the outer cover of Grouting Pipe is equipped with sealing element, sealing element is arranged between Grouting Pipe and injected hole, is 100 millimeters~150 millimeters the distance between at the top of sealing element and injected hole；3. injecting high strength grout in the injected hole above sealing element to be sealed, Grouting Pipe above sealing element and the gap between injected hole are sealed；4. after high strength grout injects 24 hours, Grouting Pipe injection cement grout is given at the top of Grouting Pipe；5. after cement grout slip casting terminates 8 hours, the Grouting Pipe above injected hole is cut off, mortar depositing construction is completed.The present invention realizes the quantitative filling of cement grout, effectively increases grouting quality and stability.
Description
Technical field
The present invention relates to a kind of building fields, more particularly to a kind of construction method that can quantitatively control grouting amount.
Background technique
Consolidation grouting is exactly to inject in country rock grouting serous fluid by pore-creating, make slurries splitting to country rock by grouting pressure
Gap diffusion, makes rock mass form reinforcing a band, i.e. grouting curtain, to improve the globality of rock mass, enhance the one of Surrounding Rock Strength
Kind technology.
But in traditional slurry injection technique, there are following deficiencies:
1, toward when aperture slip casting, Grouting Pipe is directly straight from what is held successfully under terrace or under Equipment Foundations and independence/strip footing
Diameter, which is greater than in the hole of Grouting Pipe, is put into slip casting, and injected hole can not be closed, and lead under injected hole the gap of soil layer or hollow sectors not
When being very big, the speed of slurries seepage flow loss is less than injection speed, will fill rapidly injected hole and overflow, and causes too early
Slurry is returned, so that slip casting effect is bad or slip casting fails；
2, when not having the subsurface slip casting of terrace or works toward exposed or top, injected hole can not be closed, and also cause
The caused injected hole of the reason of stating first is filled and is overflowed rapidly, causes to return slurry too early, so that slip casting effect is bad or slip casting
Failure.
Summary of the invention
It is an object of the present invention to provide a kind of construction methods that can quantitatively control grouting amount to improve note by using the structure
Starch effect and quality.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of construction method that can quantitatively control grouting amount,
It the steps include:
1. boring injected hole in the position for needing slip casting, Grouting Pipe is then inserted into injected hole, the top of Grouting Pipe is exposed
In the top of injected hole, the outer diameter of Grouting Pipe is less than the diameter of injected hole；
2. the step 1. in, the outer cover of Grouting Pipe is equipped with sealing collar member, and sealing element is arranged in Grouting Pipe and injected hole
Between, it is 100 millimeters~150 millimeters the distance between at the top of sealing element and injected hole；
3. high strength grout is injected in the injected hole above sealing element to be sealed, by Grouting Pipe above sealing element with
Gap between injected hole is sealed；
4. after high strength grout injects 24 hours, Grouting Pipe injection cement grout is given at the top of Grouting Pipe；
5. cement grout in Grouting Pipe is sent out from the bottom of Grouting Pipe, such cement grout be squeezed into injected hole when
Wait, cement grout can be squeezed into the position for needing slip casting from the gap of injected hole, while cement grout also can full of injected hole with
The gap of Grouting Pipe, is blocked by high strength grout, and cement grout can not be overflowed from injected hole；
6. after cement grout slip casting terminates 8 hours, the Grouting Pipe above injected hole is cut off, mortar depositing construction is completed.
In above-mentioned technical proposal, the diameter of the injected hole is 50 millimeters, and the outer diameter of the Grouting Pipe is 32 millimeters.
In above-mentioned technical proposal, the sealing element is two groups of ring-shaped rubber pieces, and the outer diameter of the ring-shaped rubber piece is 52 millis
Rice, the distance between two groups of ring-shaped rubber pieces are 50 millimeters, are arranged at the top of the ring-shaped rubber piece above Grouting Pipe and injected hole
The distance between be 100 millimeters~150 millimeters.
In above-mentioned technical proposal, the Grouting Pipe has been externally wrapped with a Fried Glutinous Rice Balls with Sesame, and the silk Fried Glutinous Rice Balls with Sesame are set to two groups of annulars
Between sheet rubber.
In above-mentioned technical proposal, the sealing element is silk Fried Glutinous Rice Balls with Sesame, and the silk Fried Glutinous Rice Balls with Sesame are wound in the outside of the Grouting Pipe, institute
A Fried Glutinous Rice Balls with Sesame are stated to be set between the Grouting Pipe and injected hole.
In above-mentioned technical proposal, the top outer edge surface of the Grouting Pipe is equipped with external screw thread.
In above-mentioned technical proposal, the step 4. in, the injection rate of cement grout is 10L/min~20L/min.
In above-mentioned technical proposal, the bottom of the Grouting Pipe is equipped with one way stop peturn valve.
In above-mentioned technical proposal, the step 3. in, the high strength grout be ungauged regions C40 high strength grout,
The step 4. in, after high strength grout 24 hours, compressive resistance be greater than 2MPa.
Due to the above technical solutions, the present invention has the following advantages over the prior art:
1. by the way that injection high-intensity sealing material carries out at the gap of junction at the top of Grouting Pipe and injected hole in the present invention
Sealing, when cement grout is injected in this way in subsequent Grouting Pipe, cement grout will not be between Grouting Pipe and injected hole
Gap is overflowed outward, improves slip casting effect and grouting quality, guarantees grouting and reinforcing quality；
2. sealing element can be improved sealing effect using the production such as ring-shaped rubber piece, silk Fried Glutinous Rice Balls with Sesame in this way in the present invention, guarantee
The grouting quality of subsequent cement grout.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in the embodiment of the present invention one；
Fig. 2 is the partial enlarged view in Fig. 1 at sealing element.
Wherein: 1, concrete；2, injected hole；3, Grouting Pipe；4, sealing element；5, high strength grout；6, ring-shaped rubber piece；
7, silk Fried Glutinous Rice Balls with Sesame；8, external screw thread；9, one way stop peturn valve.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments:
Embodiment one: ginseng as shown in FIGS. 1 and 2, it is a kind of quantitatively control grouting amount construction method, the steps include:
1. injected hole 2 is bored on concrete in the present embodiment, by taking the slip casting below concrete 1 as an example, injected hole
Then bottom is inserted into Grouting Pipe 3 in injected hole 2, the top of injected hole is exposed at the top of Grouting Pipe in the lower section of concrete,
The outer diameter of Grouting Pipe is less than the diameter of injected hole；
2. the step 1. in, the outer cover of Grouting Pipe 3 is equipped with sealing element 4, and sealing element is arranged in Grouting Pipe and injected hole
Between, it is 100 millimeters the distance between at the top of sealing element and injected hole；
Wherein, sealing element can first cover in Grouting Pipe, then Grouting Pipe is inserted into injected hole, can also be first by slip casting
Pipe is inserted into injected hole, then covers upper seal.
3. injecting high strength grout 5 in the injected hole 2 above sealing element 4 to be sealed, by slip casting above sealing element
Gap between pipe and injected hole is sealed；Wherein, the high strength grout is ungauged regions C40 high strength grout.
4. after high strength grout injects 24 hours, Grouting Pipe injection cement grout is given at the top of Grouting Pipe；Its
In, after high strength grout 24 hours, compressive resistance is greater than 2MPa.By high strength grout after hardening to Grouting Pipe and note
Top clearance between slurry hole is sealed, and when injecting cement grout using Grouting Pipe in this way, Grouting Pipe is in injected hole
When injecting cement grout, cement grout will not overflow between the gap between injected hole and Grouting Pipe, guarantee cement
Slurries only can be from the bottom of injected hole and side towards needing the position of slip casting to be permeated.
5. cement grout in Grouting Pipe is sent out from the bottom of Grouting Pipe, such cement grout be squeezed into injected hole when
Wait, cement grout can be squeezed into the position for needing slip casting from the gap of injected hole, while cement grout also can full of injected hole with
The gap of Grouting Pipe, is blocked by high strength grout, and cement grout can not be overflowed from injected hole；Wherein, due to by high-strength
The setting of grouting material is spent, that is, the channel of possible pressure release is shut, cement grout is injected into the case where keeping pressure
It starches in hole, in the case where keeping pressure, cement grout can sufficiently be squeezed into the gap and position for needing slip casting from the gap of injected hole
It sets.
Step 5. in, certain spacing is equipped between the bottom of Grouting Pipe and the bottom of injected hole, cement grout is from note
The top for starching pipe is sent into, then is sent out from the bottom of Grouting Pipe, and cement grout is first injected into injected hole, and part of cement slurries can incite somebody to action
Gap filling between injected hole and slip casting pipe outer wall is full, when sealing element is touched at the top of cement grout, at most will
Sealing element promotion touches high strength grout, stops by the sealing of high strength grout, cement grout just can not be from slip casting
It is leaked out between gap between hole and Grouting Pipe, since what Grouting Pipe was continued for injects cement grout, such water in injected hole
Slurry liquid will enter the position for needing slip casting from the gap from injected hole, and cement grout, which can be gradually filled with, needs slip casting position,
Until the design requirement or cement grout that meet grouting amount are overflowed, from isolated footing or strip footing at other positions from distal end
Side spilling or the spilling elsewhere from no concrete covering, even if being overflowed from these distal sites, it is also assumed that
Sufficient cement grout injection has been obtained in the approach position that cement grout flows through, and thus completes the injection of cement grout.
Wherein, the bottom of the Grouting Pipe is equipped with one way stop peturn valve 9.In the present embodiment, one way stop peturn valve can be set,
Can also be not provided with, be adjusted according to practical matter, after mainly preventing cement grout slip casting from terminating, cement grout along
Grouting Pipe up returns slurry, guarantees grouting quality.
Step 5. in, if the slurries of ground after slip casting not with pressure is required to overflow, can increase in slip casting bottom of the tube
Add an one way stop peturn valve, in this way, after stopping slip casting, after the pipe of filling cement grout at the top of Grouting Pipe is removed, by
In the effect of one way stop peturn valve, lower part cement grout will be unable to overflow by Grouting Pipe toward ground, meanwhile, lower part can have been kept
Through inject fill up each hole, crack, gap position cement grout solidify under stress, effectively holding slip casting effect.
6. after cement grout slip casting terminates 8 hours, the Grouting Pipe above injected hole is cut off at flush with ground, note is completed
Slurry construction.
Wherein, after cement grout slip casting terminates 8 hours, the slip casting above injected hole will can be exposed at according to requiring
Pipe flush with ground is directly cut off, it is made not influence subsequent use.
In the present embodiment, the diameter of the injected hole is 50 millimeters, and the outer diameter of the Grouting Pipe is 32 millimeters.
In the present embodiment, if when cement floor or ground settle, slip casting is played on 1 surface of concrete
Hole, can be by coagulation by the cement grout of injection toward progress slip casting at concrete lower section or crack using the grouting process
Soil face is lifted or concrete lower section is reinforced, and prevents from settling again.The place of common not concrete carries out slip casting
When, this part ground can also be reinforced.
Shown in Figure 2, the sealing element 4 is two groups of ring-shaped rubber pieces 6, and the outer diameter of the ring-shaped rubber piece is 52 millis
Rice, the distance between two groups of ring-shaped rubber pieces are 50 millimeters, are arranged at the top of the ring-shaped rubber piece above Grouting Pipe and injected hole
The distance between be 100 millimeters~150 millimeters.
It can be utilized most upper when high strength grout is injected at the top of injected hole using two groups of ring-shaped rubber pieces
One group of face ring-shaped rubber piece is stopped, and is prevented high strength grout from continuing traveling downwardly and is blocked injected hole, and subsequent cement grout is convenient for
It is injected into injected hole by Grouting Pipe.Meanwhile using the setting of two groups of ring-shaped rubber pieces, accordingly even when the high-intensitive grouting in part
When material is by one group of ring-shaped rubber piece decline of upper mold, it can also be stopped by following set ring-shaped rubber piece, in this way
When high strength grout slip casting and solidification, sealing function is effectively played.
Shown in Figure 2, the Grouting Pipe 3 has been externally wrapped with a Fried Glutinous Rice Balls with Sesame 7, and the silk Fried Glutinous Rice Balls with Sesame are set to two groups of annular rubbers
Between film.
In the present embodiment, in order to further increase sealing element to one of high strength grout support and sealing function,
When cement grout is injected into uplink in injected hole simultaneously, silk Fried Glutinous Rice Balls with Sesame are multi-filament fiber crops mutually winding interlaced arrangement, in this way
Cement grout can have biggish resistance when through silk rolling Fried Glutinous Rice Balls with Sesame gap, it is difficult to which uplink can give high strength grout
The effect of one Auxiliary support sealing, prevents cement grout from overflowing from injected hole, guarantees grouting quality.
Ginseng as shown in FIGS. 1 and 2, the top outer edge surface of the Grouting Pipe 3 is equipped with external screw thread 8.In this way convenient for slip casting mechanism with
Grouting Pipe is attached, and is convenient for slip casting.
Wherein, the step 4. in, the injection rate of cement grout is 10L/min~20L/min.Since Grouting Pipe compares
It is small, it gives injected hole excessive pressure also for Grouting Pipe is reduced, reduces the pressure to high strength grout, by rationally adjusting
The injection rate of cement grout guarantees grouting quality and stability.
Embodiment two: a kind of construction method that can quantitatively control grouting amount, in the present embodiment, step and embodiment one
It is identical, difference are as follows: the sealing element is silk Fried Glutinous Rice Balls with Sesame, and the silk Fried Glutinous Rice Balls with Sesame are wound in the outside of the Grouting Pipe, the silk Fried Glutinous Rice Balls with Sesame
It is set between the Grouting Pipe and injected hole.In the present embodiment, in the difference of embodiment one be to be not provided with ring-shaped rubber
Piece directlys adopt a Fried Glutinous Rice Balls with Sesame as sealing element.In this mode, first Grouting Pipe can be inserted into injected hole, then by silk
Fried Glutinous Rice Balls with Sesame are tucked into injected hole, block a Fried Glutinous Rice Balls with Sesame will in the middle part of injected hole, convenient for the injection of subsequent high strength grout
Solidification and the injection of subsequent cement grout, thus without filling in a Fried Glutinous Rice Balls with Sesame in advance.
Claims (9)
1. one kind can quantitatively control the construction method of grouting amount, the steps include:
1. boring injected hole in the position for needing slip casting, it is then inserted into Grouting Pipe in injected hole, note is exposed at the top of Grouting Pipe
The top in hole is starched, the outer diameter of Grouting Pipe is less than the diameter of injected hole；
2. the step 1. in, the outer cover of Grouting Pipe is equipped with sealing element, and sealing element is arranged between Grouting Pipe and injected hole, close
It is 100 millimeters~150 millimeters the distance between at the top of sealing and injected hole；
3. injecting high strength grout in the injected hole above sealing element to be sealed, by Grouting Pipe above sealing element and slip casting
Gap between hole is sealed；
4. after high strength grout injects 24 hours, Grouting Pipe injection cement grout is given at the top of Grouting Pipe；
5. the cement grout in Grouting Pipe is sent out from the bottom of Grouting Pipe, when such cement grout is squeezed into injected hole,
Cement grout can be squeezed into the position for needing slip casting from the gap of injected hole, while cement grout can also be full of injected hole and slip casting
The gap of pipe, is blocked by high strength grout, and cement grout can not be overflowed from injected hole；
6. after cement grout slip casting terminates 8 hours, the Grouting Pipe above injected hole is cut off, mortar depositing construction is completed.
2. it is according to claim 1 quantitatively control grouting amount construction method, it is characterised in that: the injected hole it is straight
Diameter is 50 millimeters, and the outer diameter of the Grouting Pipe is 32 millimeters.
3. the construction method according to claim 1 for quantitatively controlling grouting amount, it is characterised in that: the sealing element is two
Group ring-shaped rubber piece, the outer diameter of the ring-shaped rubber piece are 52 millimeters, and the distance between two groups of ring-shaped rubber pieces are 50 millimeters, if
Set the ring-shaped rubber piece above Grouting Pipe at the top of injected hole between at a distance from for 100 millimeters~150 millimeters.
4. the construction method according to claim 3 for quantitatively controlling grouting amount, it is characterised in that: outside the Grouting Pipe
Portion is wound with a Fried Glutinous Rice Balls with Sesame, and the silk Fried Glutinous Rice Balls with Sesame are set between two groups of ring-shaped rubber pieces.
5. the construction method according to claim 1 for quantitatively controlling grouting amount, it is characterised in that: the sealing element is silk
Fried Glutinous Rice Balls with Sesame, the silk Fried Glutinous Rice Balls with Sesame are wound in the outside of the Grouting Pipe, and the silk Fried Glutinous Rice Balls with Sesame are set between the Grouting Pipe and injected hole.
6. the construction method according to claim 1 for quantitatively controlling grouting amount, it is characterised in that: the top of the Grouting Pipe
Portion's outer edge surface is equipped with external screw thread.
7. it is according to claim 1 quantitatively control grouting amount construction method, it is characterised in that: the step 4. in,
The injection rate of cement grout is 10L/min~20L/min.
8. the construction method according to claim 1 for quantitatively controlling grouting amount, it is characterised in that: the bottom of the Grouting Pipe
Portion is equipped with one way stop peturn valve.
9. it is according to claim 1 quantitatively control grouting amount construction method, it is characterised in that: the step 3. in,
The high strength grout be ungauged regions C40 high strength grout, the step 4. in, after high strength grout 24 hours,
Compressive resistance is greater than 2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154076.2A CN109778862A (en) | 2019-03-01 | 2019-03-01 | A kind of construction method quantitatively controlling grouting amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154076.2A CN109778862A (en) | 2019-03-01 | 2019-03-01 | A kind of construction method quantitatively controlling grouting amount |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109778862A true CN109778862A (en) | 2019-05-21 |
Family
ID=66485990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910154076.2A Pending CN109778862A (en) | 2019-03-01 | 2019-03-01 | A kind of construction method quantitatively controlling grouting amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109778862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933210A (en) * | 2021-11-05 | 2022-01-14 | 保定同恒建筑工程有限公司 | Construction method for grouting amount of cement paste |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2234463Y (en) * | 1995-06-16 | 1996-09-04 | 向余庆 | Vibration grouting device |
| CN102493437A (en) * | 2011-11-26 | 2012-06-13 | 山东大学 | Grouting-type micro steel pipe pile and grouting reinforcement method |
| CN206034415U (en) * | 2016-08-23 | 2017-03-22 | 上海长凯岩土工程有限公司 | Sleeve valve pipe slip casting system |
| CN106761823A (en) * | 2016-12-07 | 2017-05-31 | 中铁十四局集团有限公司 | Exempt from wall for grouting segmentation cleaning bottom of hole retrusive controlling grouting method |
| KR20170083175A (en) * | 2016-01-07 | 2017-07-18 | 주식회사 씨케이 | Steel pipe spacer supply device for grouting |
| CN107417182A (en) * | 2017-07-18 | 2017-12-01 | 中原工学院 | Intumescent high polymer cement mortar, grouting and reinforcing device and grouting strengthening method |
-
2019
- 2019-03-01 CN CN201910154076.2A patent/CN109778862A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2234463Y (en) * | 1995-06-16 | 1996-09-04 | 向余庆 | Vibration grouting device |
| CN102493437A (en) * | 2011-11-26 | 2012-06-13 | 山东大学 | Grouting-type micro steel pipe pile and grouting reinforcement method |
| KR20170083175A (en) * | 2016-01-07 | 2017-07-18 | 주식회사 씨케이 | Steel pipe spacer supply device for grouting |
| CN206034415U (en) * | 2016-08-23 | 2017-03-22 | 上海长凯岩土工程有限公司 | Sleeve valve pipe slip casting system |
| CN106761823A (en) * | 2016-12-07 | 2017-05-31 | 中铁十四局集团有限公司 | Exempt from wall for grouting segmentation cleaning bottom of hole retrusive controlling grouting method |
| CN107417182A (en) * | 2017-07-18 | 2017-12-01 | 中原工学院 | Intumescent high polymer cement mortar, grouting and reinforcing device and grouting strengthening method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933210A (en) * | 2021-11-05 | 2022-01-14 | 保定同恒建筑工程有限公司 | Construction method for grouting amount of cement paste |
| CN113933210B (en) * | 2021-11-05 | 2024-03-26 | 保定同恒建筑工程股份有限公司 | Construction method for grouting amount of cement paste |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104975594B (en) | A kind of Grouting Pipe and construction method for miscellaneous fill stratum | |
| CN106014201B (en) | A kind of outer release hole safe construction technique of tunnel grouting curtain | |
| CN106592614B (en) | The method for blocking of leakage point in foundation pit waterproof of man | |
| CN206888996U (en) | A kind of shield sky pushes through the section of jurisdiction float Structure of Tunneling by mining method | |
| CN104805842A (en) | Steel flower pipe segmented grouting system and construction method thereof | |
| CN112081127A (en) | Tunnel earth surface pre-grouting reinforcement method | |
| CN109680675A (en) | A kind of Stabilizing Grout method that can dynamically control grouting amount and harden opportunity | |
| CN109778862A (en) | A kind of construction method quantitatively controlling grouting amount | |
| CN204435906U (en) | Planting reinforced bar into concrete device | |
| CN112145189A (en) | Novel duct piece grouting reinforcement method for soft soil area | |
| CN109898880A (en) | A kind of steel counter-force pressing plate reinforcement means with crack cob wall | |
| KR101248088B1 (en) | Ground and structure reinforcing method for repair construction of construction structure | |
| CN101979820A (en) | Process for sealing elevation drill hole water-stopping sleeves | |
| CN101793027A (en) | Core-grouted static pressure anchor rod pile | |
| CN206784327U (en) | A kind of stone masonry dam poor quality dam grouting reinforcing structure | |
| CN105908697A (en) | Method for strengthening foundation through horizontal grouting holes | |
| CN104452746A (en) | Construction method for bored pile | |
| CN203440820U (en) | Improved pouring pile end post-grouting device | |
| CN106761823B (en) | Exempt from wall for grouting segmentation cleaning bottom of hole retrusive controlling grouting method | |
| CN104328781A (en) | Unfavorable geologic body controlling infiltration chemical grouting method | |
| RU2622054C2 (en) | Grout for compensation grouting in soils of bases while eliminating deformations of buildings and structures | |
| CN209053065U (en) | The leakage preventing structure of rockfill dam with asphalt concrete core on deep covering layer | |
| CN106837378B (en) | Exempt from wall for grouting segmentation cleaning bottom of hole retrusive controlling grouting equipment | |
| CN201635072U (en) | Centrally grouted static-pressured anchor pile former | |
| CN106013264B (en) | A kind of regulation method suitable for tunnel bottom interstitital texture protuberance cracking |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190521 |