CN112144338A - Roadbed construction method of peat soil foundation - Google Patents
Roadbed construction method of peat soil foundation Download PDFInfo
- Publication number
- CN112144338A CN112144338A CN202010940202.XA CN202010940202A CN112144338A CN 112144338 A CN112144338 A CN 112144338A CN 202010940202 A CN202010940202 A CN 202010940202A CN 112144338 A CN112144338 A CN 112144338A
- Authority
- CN
- China
- Prior art keywords
- sea sand
- peat soil
- water content
- soil foundation
- compaction
- 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
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a roadbed construction method of a peat soil foundation, which comprises the following steps: an obtaining step, obtaining the optimal water content value of the sea sand in the maximum dry density state; a laying step, laying the sea sand on a peat soil foundation; a sprinkling step, sprinkling the sea sand to a preset degree; rolling, namely rolling the watered sea sand; detecting whether the compaction degree of the rolled sea sand meets a preset standard or not; wherein the preset standard is determined according to the optimal water content value; if the preset standard is not met, the step of watering, the step of rolling and the step of detecting are repeated until the preset standard is met. The method can effectively ensure the roadbed construction quality of the peat soil foundation, reduce the construction difficulty, accelerate the construction progress, and utilize sea sand for filling, particularly in areas with abundant coastal sea sand resources, can effectively utilize resources and save the engineering cost.
Description
Technical Field
The invention relates to the technical field of roadbed construction, in particular to a roadbed construction method of a peat soil foundation.
Background
The peat soil is rich in organic matters, and the organic matters are formed by accumulation of animal and plant residues which are decomposed insufficiently in a large amount under the condition of oxygen deficiency. The lower the degree of degradation, the more residual fibres are contained in the soil; the higher the degradation degree, the more amorphous humus in the soil. The higher the content of organic matter is, the greater the influence on the soil texture is, and the main expression is low strength and large compressibility. When the peat soil foundation is subjected to roadbed construction, due to the characteristics of the peat soil, the traditional roadbed treatment mode such as a clay and mechanical rolling mode is adopted, so that the construction difficulty is increased, the construction quality is reduced, and the construction progress is slowed down.
Disclosure of Invention
In view of the above, the invention provides a peat soil foundation roadbed construction method, and aims to solve the problem that the construction quality and the construction progress are easily reduced by adopting a traditional roadbed treatment mode in peat soil foundation treatment in the prior art.
The invention provides a roadbed construction method of a peat soil foundation, which comprises the following steps: an obtaining step, obtaining the optimal water content value of the sea sand in the maximum dry density state; a laying step, laying the sea sand on a peat soil foundation; a sprinkling step, sprinkling the sea sand to a preset degree; rolling, namely rolling the watered sea sand; detecting whether the compaction degree of the rolled sea sand meets a preset standard or not; wherein the preset standard is determined according to the optimal water content value; and if the preset standard is not met, repeating the steps of watering, rolling and detecting until the preset standard is met.
Further, in the above-mentioned peat soil foundation roadbed construction method, in the obtaining step, sea sand is sampled, a standard compaction test is performed on the sampled sea sand, a compaction standard is determined, and an optimal water content value is determined according to the compaction standard.
Further, in the method for constructing a roadbed using peat soil as a foundation, the thickness of sea sand is 500mm or less in the step of laying, and the coefficient of loose bed is 1.060.
Further, in the above-mentioned peat soil foundation roadbed construction method, the preset degree is saturated watering in the watering step.
Further, in the method for constructing the roadbed of the peat soil foundation, a preset exciting force is adopted for carrying out primary static pressure in the rolling step.
Furthermore, in the method for constructing the peat soil foundation subgrade, the preset exciting force is less than or equal to 29 KN.
Further, in the above method for constructing a subgrade of a peat soil foundation, the detecting step further comprises: a first determining substep, namely taking a plurality of samples of the rolled sea sand, and determining the compactness and the water content of each sample; a second determining substep, determining the average water content of the rolled sea sand according to the water content of each sample, and determining the average compaction degree of the rolled sea sand according to the water content and the compaction degree of each sample; and a third determining substep of determining whether the preset standard is met according to the average compaction degree and the average water content of the rolled sea sand.
Further, in the above method for constructing a roadbed on a peat soil foundation, the preset standards are as follows: when the average water content is 10-13%, the average compaction degree is 94-98%; when the average water content is 13-15%, the average compactness is 98-95%.
Further, in the above-mentioned method of constructing a roadbed by using peat soil, in the first determining substep, the thickness of the roadbed is 2000m28 test points are selected in the range, and each test point is sampled.
Furthermore, in the above-mentioned method for constructing a roadbed on a peat soil foundation, in the first determining substep, a sand-filling method is used to detect the compaction degree of each sample to obtain the compaction degree of each sample; and (3) detecting the water content of each sample by adopting a drying method to obtain the water content of each sample.
According to the invention, the characteristic that sea sand is easy to compact after being sprinkled with water is fully utilized, the sea sand is filled in the peat soil foundation, then the sea sand is sprinkled and subjected to static pressure once, whether the compaction degree of the rolled sea sand meets the preset standard or not is detected, if not, the steps of sprinkling, static pressure and detection are repeated until the preset standard is reached, so that the roadbed construction quality of the peat soil foundation can be effectively ensured, the construction difficulty is reduced, the construction progress is accelerated, the problem that the construction quality and the construction progress are easily reduced by adopting a traditional roadbed treatment mode in the prior art when the peat soil foundation is treated is solved, the sea sand is filled, especially in areas with abundant coastal sea sand resources, the resources can be effectively utilized, the engineering cost is saved, the method only needs static pressure once, multiple rolling is not needed, and the construction steps and the engineering cost are saved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flow chart illustrating a method for constructing a subgrade of a peat soil foundation according to an embodiment of the present invention;
FIG. 2 is a graph showing a sea sand packing compaction standard curve in the method for constructing a roadbed using peat soil foundations according to the embodiment of the present invention;
fig. 3 is a diagram illustrating characteristics of sea sand material in a method for constructing a roadbed using peat soil as a foundation according to an embodiment of the present invention;
fig. 4 is a further characteristic diagram of a sea sand material in the method for constructing a roadbed using peat soil as a foundation according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a detection step in a method for constructing a subgrade of a peat soil foundation according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, fig. 1 is a flow chart illustrating a method for constructing a subgrade of a peat soil foundation according to an embodiment of the present invention. As shown in the figure, the construction method of the peat soil foundation roadbed comprises the following steps:
and an obtaining step S1, obtaining an optimal water content value of the sea sand in a maximum dry density state.
Specifically, preparation work for roadbed construction may be performed before the acquisition step S1: and measuring the roadbed end to be filled, and excavating drainage ditches at two sides of the roadbed to drain water. In specific implementation, the excavation depth of the drainage ditch is 80 cm.
Sampling sea sand on site, performing a standard compaction test on the sampled sea sand, determining a compaction standard according to the standard compaction test, and determining an optimal water content value of the sea sand in a maximum dry density state according to the compaction standard. Specifically, the optimum moisture content value in the state of maximum dry density is not a specific value but an interval range. Referring specifically to fig. 2 to 4, fig. 2 shows a standard compaction curve of sea sand seasonings, the trend of the compaction curve is generally parabolic, and the parabolic compaction curve is characterized differently because the density of the sea sand is sensitive to the water content. When the sea sand compactness is sensitive to the change of the water content, the compaction curve is narrow and steep; when it is not sensitive, the compaction curve is wide and gentle. As can be seen from FIG. 2, the dry density is high when the water content of the sea sand is 10% to 15%.
FIG. 3 shows a single linear relationship between the water content of the sea sand filler and the change of the fineness modulus: Y1.988X + 10.869. Fig. 4 shows a single linear relationship between the maximum compactness of a sea sand filler and the change of fineness modulus thereof: Y0.3309X + 1.1416. With reference to fig. 2 to 4, it can be seen that the sea sand has the following characteristics: the sea sand is natural and has good gradation, relative heavy density, small gaps among particles, difficult flowing and good compaction effect.
And a paving step S2, paving the sea sand on the peat soil foundation.
Specifically, the laying thickness of the sea sand is 500mm or less, and the loose coefficient is 1.060. And leveling the sea sand after the laying is finished.
And a sprinkling step S3, sprinkling the sea sand to a preset degree.
Specifically, the leveled sea sand is sprinkled to tamp the sea sand, so that the sea sand is compacted. The preset degree is saturation sprinkling, and more specifically, water can stay on the surface of the sea sand, namely water can be flooded on the surface of the sea sand, which means that the degree of saturation sprinkling is achieved.
And a rolling step S4, rolling the sprayed sea sand.
Specifically, static pressure is carried out once by adopting a preset exciting force during rolling, and only one static pressure is needed in the step without multiple times of rolling. In addition, the static pressure is required to be ensured, and because the friction angle of the sea sand is relatively large, the sea sand is easy to disperse during vibration, so that the vibration compaction is not suitable. Preferably, the preset excitation force is equal to or less than 29 KN.
In specific implementation, if the sprayed sea sand is in an undersaturation state, the static pressure step is not suitable, and the water spraying is continued until the saturation state is reached.
A detection step S5, detecting whether the compaction degree of the rolled sea sand meets a preset standard; wherein the predetermined criteria is determined based on the optimal moisture content value.
Referring to fig. 5, the detecting step S5 further includes:
the first determining substep S51 is to take a plurality of samples of the crushed sea sand and determine the degree of compaction and water content of each sample.
Specifically, at 2000m28 test points are selected from the range, and each test point is sampled to form a plurality of samples. Performing a compaction test on each sample to determine the degree of compaction, and performing a test on each sample to determine the degree of compactionAnd detecting the water rate to determine the water content. Preferably, the compaction degree of each sample is detected by a sand filling method so as to obtain the compaction degree of each sample. And (3) detecting the water content of each sample by adopting a drying method to obtain the water content of each sample.
A second determining substep S52, determining an average water content of the rolled sea sand according to the water content of each sample, and determining an average compaction degree of the rolled sea sand according to the water content and the compaction degree of each sample.
Specifically, for each sample, the drying method is to dry the moisture of the sample, determine the porosity of the sample after drying, and further determine the degree of compaction, and divide the degree of compaction by the standard degree of compaction to determine the percentage of the degree of compaction to the standard degree of compaction. And then, obtaining an average water content by averaging according to the water content of each sample, and obtaining an average compactness by averaging according to the percentage of the compactness of each sample in the standard compactness.
And a third determining substep S53 of determining whether the preset standard is satisfied according to the average compaction degree and the average water content of the rolled sea sand.
Specifically, the preset standard is determined according to the optimal moisture content value in the maximum dry density state, so that the compaction degree of the sea sand after static pressure can be in the best state in the range of the optimal moisture content value, and the range of the compaction degree can be accurately determined. Further, the linear relationship shown in fig. 3 and 4 also indicates that the degree of compaction is best within the range of the optimum moisture content value, and the range of the degree of compaction can be demonstrated. The preset standard is as follows: when the average water content is 10-13%, the average compaction degree is 94-98%; when the average water content is 13-15%, the average compactness is 98-95%.
It is first determined whether the average moisture content in the second determining substep S52 satisfies the range of 10% to 13% or the range of 13% to 15%, and it is then determined whether the average compaction rate in the second determining substep S52 satisfies the requirement of the above-mentioned preset criterion according to the range of the satisfied average moisture content.
And if the preset standard is met, performing the next construction of the roadbed.
If the preset standard is not met, the watering step S3, the rolling step S4 and the detecting step S5 are repeated until the preset standard is met.
It can be seen that in the embodiment, the characteristic that sea sand is easy to compact after being sprinkled with water is fully utilized to fill the sea sand in the peat soil foundation, then sprinkling water and carrying out static pressure once on the sea sand, detecting whether the compaction degree of the rolled sea sand meets the preset standard, if not, repeating the steps of sprinkling water, carrying out static pressure and detecting until the preset standard is reached, thus effectively ensuring the roadbed construction quality of the peat soil foundation, reducing the construction difficulty, accelerating the construction progress, solving the problem that the construction quality and the construction progress are easy to be reduced by adopting the traditional roadbed treatment mode when the peat soil foundation is treated in the prior art, and sea sand is used for filling, particularly in areas with abundant coastal sea sand resources, so that resources can be effectively utilized, engineering cost is saved, the method only needs static pressure once, does not need multiple rolling, and saves construction steps and construction cost.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A construction method of a subgrade of a peat soil foundation is characterized by comprising the following steps:
an obtaining step, obtaining the optimal water content value of the sea sand in the maximum dry density state;
a laying step, laying the sea sand on a peat soil foundation;
a sprinkling step, sprinkling the sea sand to a preset degree;
rolling, namely rolling the watered sea sand;
detecting whether the compaction degree of the rolled sea sand meets a preset standard or not; wherein the preset standard is determined according to the optimal water content value;
if the preset standard is not met, repeating the watering step, the rolling step and the detecting step until the preset standard is met.
2. The method of constructing a subgrade of a peat soil foundation according to claim 1, wherein in said obtaining step,
sampling the sea sand, performing a standard compaction test on the sampled sea sand, determining a compaction standard, and determining the optimal moisture content value according to the compaction standard.
3. The method of constructing a subgrade of a peat soil foundation according to claim 1, wherein in said step of laying,
the laying thickness of the sea sand is less than or equal to 500mm, and the loose coefficient is 1.060.
4. The method of constructing a subgrade of a peat soil foundation according to claim 1, wherein in said sprinkling step,
the preset degree is saturated sprinkling.
5. The method of constructing a subgrade of a peat soil foundation according to claim 1, wherein, in the step of rolling,
and carrying out primary static pressure by adopting a preset exciting force.
6. The method of constructing a peat soil foundation as claimed in claim 5, wherein the predetermined exciting force is 29KN or less.
7. The method of constructing a peat soil foundation on a road bed according to claim 1, wherein the detecting step further comprises:
a first determining substep, namely taking a plurality of samples of the rolled sea sand, and determining the compactness and the water content of each sample;
a second determining substep, determining the average water content of the rolled sea sand according to the water content of each sample, and determining the average compaction degree of the rolled sea sand according to the water content and the compaction degree of each sample;
and a third determining substep of determining whether the preset standard is met according to the average compaction degree and the average water content of the rolled sea sand.
8. The method of constructing a peat soil foundation on a road bed according to claim 7, wherein the predetermined criteria are:
when the average water content is 10-13%, the average compaction degree is 94-98%;
when the average water content is 13-15%, the average compactness is 98-95%.
9. The method of constructing a subgrade of a peat soil foundation according to claim 7, wherein in said first substep of determination,
at 2000m28 test points are selected in the range, and each test point is sampled.
10. The method of constructing a subgrade of a peat soil foundation according to claim 7, wherein in said first substep of determination,
carrying out compactness detection on each sample by adopting a sand filling method to obtain the compactness of each sample;
and detecting the water content of each sample by adopting a drying method to obtain the water content of each sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010940202.XA CN112144338A (en) | 2020-09-09 | 2020-09-09 | Roadbed construction method of peat soil foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010940202.XA CN112144338A (en) | 2020-09-09 | 2020-09-09 | Roadbed construction method of peat soil foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112144338A true CN112144338A (en) | 2020-12-29 |
Family
ID=73890653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010940202.XA Pending CN112144338A (en) | 2020-09-09 | 2020-09-09 | Roadbed construction method of peat soil foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112144338A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737591A (en) * | 2021-10-21 | 2021-12-03 | 启东通启工程试验检测有限公司 | Construction method for filling highway subgrade by solidifying sea sand soil |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002030652A (en) * | 2000-07-13 | 2002-01-31 | Katsukuni Ashino | Method for insoluble improved soil |
| CN101962928A (en) * | 2010-08-12 | 2011-02-02 | 中铁二十二局集团第一工程有限公司 | Construction method for processing aeolian sand roadbed base through impacting and grinding |
| CN103161109A (en) * | 2011-12-13 | 2013-06-19 | 中国二十冶集团有限公司 | Method for subgrade filling of peat soil subgrade by sea sand |
| CN106149497A (en) * | 2015-04-02 | 2016-11-23 | 中国二十冶集团有限公司 | A kind of sea sand roadbed side slope rock-steady structure and construction method |
| CN107188525A (en) * | 2017-07-13 | 2017-09-22 | 山东大学 | Roadbed filling that a kind of building waste is produced with river sand and preparation method thereof |
| CN111305179A (en) * | 2020-03-31 | 2020-06-19 | 长安大学 | Natural gravel roadbed quality detection and evaluation method based on vibration frequency |
-
2020
- 2020-09-09 CN CN202010940202.XA patent/CN112144338A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002030652A (en) * | 2000-07-13 | 2002-01-31 | Katsukuni Ashino | Method for insoluble improved soil |
| CN101962928A (en) * | 2010-08-12 | 2011-02-02 | 中铁二十二局集团第一工程有限公司 | Construction method for processing aeolian sand roadbed base through impacting and grinding |
| CN103161109A (en) * | 2011-12-13 | 2013-06-19 | 中国二十冶集团有限公司 | Method for subgrade filling of peat soil subgrade by sea sand |
| CN106149497A (en) * | 2015-04-02 | 2016-11-23 | 中国二十冶集团有限公司 | A kind of sea sand roadbed side slope rock-steady structure and construction method |
| CN107188525A (en) * | 2017-07-13 | 2017-09-22 | 山东大学 | Roadbed filling that a kind of building waste is produced with river sand and preparation method thereof |
| CN111305179A (en) * | 2020-03-31 | 2020-06-19 | 长安大学 | Natural gravel roadbed quality detection and evaluation method based on vibration frequency |
Non-Patent Citations (2)
| Title |
|---|
| 中国二十冶集团有限公司: "《中冶斯里兰卡机场高速公路工程（CKE）施工技术》", 31 January 2016, 上海：同济大学出版社 * |
| 河南省住房和城乡建设厅: "《城市道路检测技术》", 31 October 2014, 郑州：黄河水利出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737591A (en) * | 2021-10-21 | 2021-12-03 | 启东通启工程试验检测有限公司 | Construction method for filling highway subgrade by solidifying sea sand soil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DiGioia et al. | Fly ash as structural fill | |
| Vaughan et al. | Factors controlling the stability of clay fills in Britain | |
| CN108342936A (en) | A kind of sand-filled subgrade construction method | |
| CN101220589B (en) | Soil engineering bag and method for dynamically squeezing and synthetically reinforcing soft groundwork | |
| CN107165013A (en) | Geotechnical grid reinforcement foam concrete light road foundation fills structure and its method | |
| CN106049417B (en) | A kind of method of acid adding presoaking processing collapsible loess foundation | |
| CN105421328B (en) | The method of construction of collapsible loess area roadbed basement process structure | |
| CN111636443B (en) | Guiding and sucking type swelling soil slope shallow water control covering system based on capillary retardation mechanism | |
| CN112144338A (en) | Roadbed construction method of peat soil foundation | |
| CN104631255B (en) | A kind of use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual | |
| CN113718604A (en) | Wind-accumulated sand filler filling method for desert abdominal highway | |
| Zhong et al. | Evaluation and analysis of the effect of lignin amelioration on loess collapsibility | |
| CN112681041A (en) | Construction method of salinized soil roadbed and salinized soil roadbed | |
| Cantré et al. | Installation of fine-grained organic dredged materials in combination with geosynthetics in the German DredgDikes research dike facility | |
| CN105386448A (en) | Filling construction method for backward slope in rock-fill dam slope treatment | |
| Zhou et al. | Deformation and crack development of a nailed loose fill slope subjected to water infiltration | |
| CN110029626A (en) | A kind of bank revetment foundation consolidation process technology in soft formation side slope | |
| CN114215074A (en) | Ditch earthwork backfilling method | |
| Gunther et al. | Modified Dry Mixing (MDM)–a new possibility in Deep mixing | |
| CN109469086A (en) | A kind of Collapsible Loess District pump house ground Simple treatment method | |
| Wong | Ground improvement case studies chemical lime piles and dynamic replacement | |
| CN115492173B (en) | On-site testing method for non-sticky coarse-grained soil relative density test | |
| Umana et al. | Investigation of the effect of multiple wetting and drying cycles on the shrinkage and cracking of engineered clay soil | |
| CN110984118A (en) | Loess stratum road bridge foundation treatment method | |
| Roy | Effects of Reinforcing Elements in Soil Reinforcement |
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: 20201229 |