CN108444789A - A kind of preparation method of the impervious sample of soil cement - Google Patents
A kind of preparation method of the impervious sample of soil cement Download PDFInfo
- Publication number
- CN108444789A CN108444789A CN201810484828.7A CN201810484828A CN108444789A CN 108444789 A CN108444789 A CN 108444789A CN 201810484828 A CN201810484828 A CN 201810484828A CN 108444789 A CN108444789 A CN 108444789A
- Authority
- CN
- China
- Prior art keywords
- sample
- preparation
- cylinder
- soil
- plug
- 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.)
- Withdrawn
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 77
- 239000002689 soil Substances 0.000 title claims abstract description 63
- 239000004568 cement Substances 0.000 title claims abstract description 53
- 238000005520 cutting process Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920000965 Duroplast Polymers 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of preparation methods of the impervious sample of soil cement, belong to soil test technique field.The preparation facilities that this preparation method uses includes mainly sample preparation cylinder, upper pressure-like plug and lower pressure-like plug.Sample preparation cylinder is half-and-half type cylinder, is fitted together two cylinder pieces by clip.Upper pressure-like plug and the extruded soil cement stirred evenly of lower pressure-like plug produce the sample for meeting impermeability test requirement.The sample compactness produced using this preparation method is uniform, cracked during avoidable late maintaining, and the preparation method is simple, efficient.
Description
Technical field
The present invention relates to a kind of preparation methods of the impervious sample of soil cement, belong to soil test technique field.
Background technology
In Excavation Process, water-head is generally had inside and outside foundation pit.Under the action of water-head, the water outside foundation pit can ooze
Quicksand can occur in people's foundation pit, when serious or dash forward to gush, foundation pit is damaged.Water-stop curtain can be effectively prevented this kind of broken
Bad, the underground water penetrated into foundation pit will be reduced significantly, it is easier to be discharged.In deep excavation project, underground water buried depth
Can be that water-stop curtain is arranged in material around foundation pit with soil cement when shallower and soil layer infiltration coefficient is larger.Soil cement is just
It is the mixture of soil and cement, generally uses Construction of High Pressure Jet Grouting Pile machinery in engineering, cement grout is mixed into shape in the soil body
At.Therefore, it is necessary to understand the impervious characteristic of soil cement, to determine the best additive ratio of cement in soil cement, this just need into
The impermeability test of row soil cement.
The preparation of the impervious sample of soil cement is a very the key link, and the quality of sample directly influences test result
Accuracy.Currently, there are two types of the shapes of the impervious sample made in laboratory：Cylindrical and conical butt.In view of scene
The cement soil sample of core boring sampling is cylindric, for the ease of the comparison of test results of the sample obtained with scene, indoor making
Soil cement impervious sample should preferentially use it is cylindric.It is previous that such columned sample is generally made using cutting ring.
During making cylindric sample using cutting ring, it is real that soil cement is that layering is hit, and be easy to cause the compacting of sample
Spend uneven, Coating combination, which is in subsequent maintenance, is susceptible to crackle.These factors can all have an impact test result,
Urgently develop the preparation method of the impervious sample of more rational soil cement.
Invention content
It is an object of the invention to solve the problems, such as the deficiencies in the prior art and, a kind of impervious sample of soil cement is provided
Preparation method.
The present invention provides a kind of preparation methods of the impervious sample of soil cement.Using special preparation facilities, preparation dress
It includes mainly sample preparation cylinder, pressure-like plug, clip to set, and sample preparation cylinder is half-and-half type, is fitted together by clip by two cylinder pieces, sample preparation
Pressure-like plug, soil cement, pressure-like plug are followed successively by barrel chamber from down to up；The preparation method mainly includes the following steps that：
Step 1：Two cylinder pieces are taken, it is opposite to form sample preparation cylinder, three clips are evenly arranged on the outside of sample preparation cylinder, tightening nut makes a piece
Stitching portion is in close contact；
Step 2：Sample preparation cylinder is placed on smooth desktop, lower face with desktop is seamless contacts, to sample preparation cylinder inner wall brushing mineral
Oil as releasing agent, then takes a pressure-like plug, is put into sample preparation cylinder；
Step 3：The cement soil sample soil stirred evenly is weighed, slowly pours into sample preparation cylinder, flattens；
Step 4：A pressure-like plug is taken to be put into sample preparation cylinder again, by slowly applying pressure so that the upper table of pressure-like plug above
Face is concordant with the upper surface of sample preparation cylinder, and in the pressurized state, is kept for 5 minutes；
Step 5：Unscrew nut, removal clip, cylinder piece removes pressure-like plug, obtains cement soil sample；
Step 6：A cutting ring is taken, horizontal is on duroplasts backing plate, during the cement soil sample that step 5 obtains is put into cutting ring
Between position, make the gap uniformity of cement soil sample and cutting ring inner wall, the vasoliniment that injection heating is crossed into gap with needle tubing, really
Confidential letter after 1 hour, has just obtained the impervious sample of soil cement.
In scheme provided by the invention, sample preparation cylinder uses half-and-half type, is avoided directly for the ease of taking out the sample made
From cylinder（Such as cutting ring）When interior release, sample is damaged and is damaged.It is primary that soil cement needed for a sample will be made
Property be packed into sample preparation cylinder, compactness caused by reality is hit in avoidable layering is uneven, and then sample the problems such as being also easy to produce crackle.Step
The amount of the cement soil sample soil stirred evenly weighed in 3, decides after repeatedly attempting, can ensure that making
The compactness of cement soil sample reaches setting value.Pressurized state in step 4 is kept for 5 minutes, is in order to avoid molding cement
Larger resilience occurs for soil sample.
The internal diameter of the sample preparation cylinder is 56mm, outer diameter 66mm, is highly 120mm.This is because then carrying out impervious
When experiment, need that sample is put into cutting ring and is sealed with wax.The internal diameter of cutting ring is 61.8mm, a height of 40mm.Sample obtained is put into
After in cutting ring, nearly the gap of 3.0mm can meet the flowing of the vasoliniment after heating, ensure that sample is tightly wrapped up.
The size of two pressure-like plugs is identical, a diameter of 55.4mm, is highly 40mm.The height of sample is 40mm,
The height of pressure-like plug is 40mm, and when sample preparation, a pressure-like plug is put in the lower part in sample preparation cylinder, and the sample soil weighed is poured into sample preparation cylinder
It is interior, after leveling, a pressure-like plug is placed into, by squeezing pressure-like plug up and down, makes the bottom of the lower surface and sample preparation cylinder of lower pressure-like plug
Face is concordant, and the either flush of the upper surface and sample preparation cylinder of upper pressure-like plug has then just obtained diameter 56mm, the cement of height 40mm
Soil sample.
The clip is assembled by two clip pieces by two bolt assemblies, and the internal diameter of clip piece is 55mm.Card
The internal diameter of hoop pieces is slightly less than the outer diameter of sample preparation cylinder, be in order to install clip after, remained between two clip pieces of a clip
Certain interval, convenient for after tightening the nut of bolt assembly, clip can squeeze two cylinder pieces close.Clip has certain bullet
Property, the end of two clips mutually draws close during tightening nut, and gap reduces, and the inner surface of clip will be close to sample preparation
The outer surface of cylinder.
The material of the sample preparation cylinder, pressure-like plug and clip is stainless steel.This is to ensure gained sample not by iron
Rust pollution, also for the service life for increasing the device.
Compared with the preparation method of existing cement soil sample, the present invention can make water in the preparation process of cement soil sample
Soil sample one-pass molding avoids sample later stage problem of Cracking caused by carrying out multilayer compacting；During being compacted soil cement
Sample soil uniform force ensures that compactness is uniform；Can avoid by cement soil sample release cutting ring or when other sample preparation cylinders by
Destruction；Used device makes simply, at low cost, easy to operate；The sample preparation flow of the preparation method is simple, efficient, fast
It is prompt.
Description of the drawings
Fig. 1 the structural representation of present invention.
Fig. 2 cylinder piece schematic diagrames.
Fig. 3 clip schematic diagrames.
It is marked in figure：1- pieces；2- clips；3- pressure-like plugs；4- bolts；5- sample soil；6- nuts；7- clip pieces.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention is described in conjunction with attached drawing.
Embodiment
The preparation facilities of cement soil sample in the embodiment includes mainly sample preparation cylinder, pressure-like plug 3, clip 2, referring specifically to figure
1, Fig. 2 and Fig. 3.Sample preparation cylinder is made of two cylinder pieces 1, is fitted together by three clips 2 in outside, internal diameter 56mm, outside
Diameter is 66mm, is highly 120mm.The size of two pressure-like plugs 3 is identical, a diameter of 55.4mm, is highly 40mm.Clip 2 is by two
A clip piece 7 forms, and is linked together by diametrically opposite two bolt assemblies, bolt assembly includes bolt 4 and nut
6.The internal diameter of off working state, clip piece 7 is 55mm.Sample preparation cylinder, pressure-like plug 3, clip 2, bolt 4 and nut 6 material be
Stainless steel.When preparing the impervious sample of soil cement, using following steps：
Step 1：Two cylinder pieces 1 are taken, it is opposite to form sample preparation cylinder, three clips 2 are evenly arranged on the outside of sample preparation cylinder, tightening nut 6 makes
1 stitching portion of cylinder piece is in close contact；
Step 2：Sample preparation cylinder is placed on smooth desktop, lower face with desktop is seamless contacts, to sample preparation cylinder inner wall brushing mineral
Oil as releasing agent, then takes a pressure-like plug 3, is put into sample preparation cylinder；
Step 3：The cement soil sample soil 5 stirred evenly is weighed, is slowly poured into sample preparation cylinder, is flattened；
Step 4：Take a pressure-like plug 3 to be put into sample preparation cylinder again, by slowly applying pressure so that pressure-like plug 3 above it is upper
Surface is concordant with the upper surface of sample preparation cylinder, and in the pressurized state, is kept for 5 minutes；
Step 5：Unscrew nut 6, removal clip 2, cylinder piece 1 removes pressure-like plug 3, obtains cement soil sample；
Step 6：A cutting ring is taken, horizontal is on duroplasts backing plate, during the cement soil sample that step 5 obtains is put into cutting ring
Between position, make the gap uniformity of cement soil sample and cutting ring inner wall, the vasoliniment that injection heating is crossed into gap with needle tubing, really
Confidential letter after 1 hour, has just obtained the impervious sample of soil cement.
The description of above-mentioned specific implementation mode is merely to illustrate the present invention, rather than the rights protection model of the limitation present invention
It encloses.
Claims (5)
1. a kind of preparation method of the impervious sample of soil cement, it is characterised in that：Using special preparation facilities, preparation facilities master
To include sample preparation cylinder, pressure-like plug, clip, sample preparation cylinder is half-and-half type, is fitted together by clip by two cylinder pieces, sample preparation barrel chamber
It is inside followed successively by pressure-like plug, soil cement, pressure-like plug from down to up；The preparation method mainly includes the following steps that：
Step 1：Two cylinder pieces are taken, it is opposite to form sample preparation cylinder, three clips are evenly arranged on the outside of sample preparation cylinder, tightening nut makes a piece
Stitching portion is in close contact；
Step 2：Sample preparation cylinder is placed on smooth desktop, lower face with desktop is seamless contacts, to sample preparation cylinder inner wall brushing mineral
Oil as releasing agent, then takes a pressure-like plug, is put into sample preparation cylinder；
Step 3：The cement soil sample soil stirred evenly is weighed, slowly pours into sample preparation cylinder, flattens；
Step 4：A pressure-like plug is taken to be put into sample preparation cylinder again, by slowly applying pressure so that the upper table of pressure-like plug above
Face is concordant with the upper surface of sample preparation cylinder, and in the pressurized state, is kept for 5 minutes；
Step 5：Unscrew nut, removal clip, cylinder piece removes pressure-like plug, obtains cement soil sample；
Step 6：A cutting ring is taken, horizontal is on duroplasts backing plate, during the cement soil sample that step 5 obtains is put into cutting ring
Between position, make the gap uniformity of cement soil sample and cutting ring inner wall, the vasoliniment that injection heating is crossed into gap with needle tubing, really
Confidential letter after 1 hour, has just obtained the impervious sample of soil cement.
2. the preparation method of the impervious sample of soil cement according to claim 1, it is characterised in that：The sample preparation cylinder it is interior
Diameter is 56mm, outer diameter 66mm, is highly 120mm.
3. the preparation method of the impervious sample of soil cement according to claim 1, it is characterised in that：The size of two pressure-like plugs
Identical, a diameter of 55.4mm is highly 40mm.
4. the preparation method of the impervious sample of soil cement according to claim 1, it is characterised in that：The internal diameter of clip piece is
55mm。
5. the preparation method of the impervious sample of soil cement according to claim 1, it is characterised in that：Sample preparation cylinder, pressure-like plug and
The material of clip is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810484828.7A CN108444789A (en) | 2018-05-20 | 2018-05-20 | A kind of preparation method of the impervious sample of soil cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810484828.7A CN108444789A (en) | 2018-05-20 | 2018-05-20 | A kind of preparation method of the impervious sample of soil cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108444789A true CN108444789A (en) | 2018-08-24 |
Family
ID=63204079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810484828.7A Withdrawn CN108444789A (en) | 2018-05-20 | 2018-05-20 | A kind of preparation method of the impervious sample of soil cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108444789A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556931A (en) * | 2018-10-31 | 2019-04-02 | 同济大学 | Soil cement cutting ring sample preparation facilities and permeability coefficient of cement soil measuring method, equipment |
| CN112881133A (en) * | 2021-03-18 | 2021-06-01 | 三川德青科技有限公司 | Ring cutter sample preparation device and sample preparation method |
| CN113281185A (en) * | 2021-06-18 | 2021-08-20 | 湖北工业大学 | Piezoresistive stress induction device for monitoring solidified heavy metal polluted soil and use method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06174614A (en) * | 1992-10-05 | 1994-06-24 | Nifco Inc | Mold for mock-up for testing concrete strength |
| US20130196160A1 (en) * | 2011-05-18 | 2013-08-01 | Riken | Method for forming protein crystal |
| CN204241292U (en) * | 2014-12-05 | 2015-04-01 | 南京市建筑安装工程质量检测中心 | A kind of soil cement flexible wall permeameter cement stock mould |
| CN105067411A (en) * | 2015-09-14 | 2015-11-18 | 河海大学 | Sampling device for laboratory test of sludge solidification treatment and sampling method thereof |
| CN205130096U (en) * | 2015-11-06 | 2016-04-06 | 中建商品混凝土西安有限公司 | A examination mould brush for applying paint glue sand examination mould release agent |
| CN105716924A (en) * | 2016-04-25 | 2016-06-29 | 苏州市建设工程质量检测中心有限公司 | Concrete anti-permeability test model |
| CN105973782A (en) * | 2016-05-25 | 2016-09-28 | 长安大学 | Determination instrument and determination method for osmotic coefficients of drilling and coring test part |
| CN205607724U (en) * | 2016-04-25 | 2016-09-28 | 苏州市建设工程质量检测中心有限公司 | Impervious test mould of concrete |
| CN207300679U (en) * | 2017-09-20 | 2018-05-01 | 山东山推胜方工程机械有限公司 | A kind of concrete impervious test mould |
| CN208140451U (en) * | 2018-05-20 | 2018-11-23 | 郑州大学 | A kind of preparation facilities of the impervious sample of soil cement |
-
2018
- 2018-05-20 CN CN201810484828.7A patent/CN108444789A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06174614A (en) * | 1992-10-05 | 1994-06-24 | Nifco Inc | Mold for mock-up for testing concrete strength |
| US20130196160A1 (en) * | 2011-05-18 | 2013-08-01 | Riken | Method for forming protein crystal |
| CN204241292U (en) * | 2014-12-05 | 2015-04-01 | 南京市建筑安装工程质量检测中心 | A kind of soil cement flexible wall permeameter cement stock mould |
| CN105067411A (en) * | 2015-09-14 | 2015-11-18 | 河海大学 | Sampling device for laboratory test of sludge solidification treatment and sampling method thereof |
| CN205130096U (en) * | 2015-11-06 | 2016-04-06 | 中建商品混凝土西安有限公司 | A examination mould brush for applying paint glue sand examination mould release agent |
| CN105716924A (en) * | 2016-04-25 | 2016-06-29 | 苏州市建设工程质量检测中心有限公司 | Concrete anti-permeability test model |
| CN205607724U (en) * | 2016-04-25 | 2016-09-28 | 苏州市建设工程质量检测中心有限公司 | Impervious test mould of concrete |
| CN105973782A (en) * | 2016-05-25 | 2016-09-28 | 长安大学 | Determination instrument and determination method for osmotic coefficients of drilling and coring test part |
| CN207300679U (en) * | 2017-09-20 | 2018-05-01 | 山东山推胜方工程机械有限公司 | A kind of concrete impervious test mould |
| CN208140451U (en) * | 2018-05-20 | 2018-11-23 | 郑州大学 | A kind of preparation facilities of the impervious sample of soil cement |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556931A (en) * | 2018-10-31 | 2019-04-02 | 同济大学 | Soil cement cutting ring sample preparation facilities and permeability coefficient of cement soil measuring method, equipment |
| CN112881133A (en) * | 2021-03-18 | 2021-06-01 | 三川德青科技有限公司 | Ring cutter sample preparation device and sample preparation method |
| CN113281185A (en) * | 2021-06-18 | 2021-08-20 | 湖北工业大学 | Piezoresistive stress induction device for monitoring solidified heavy metal polluted soil and use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017133372A1 (en) | Composite foundation and method for construction thereof | |
| CN108444789A (en) | A kind of preparation method of the impervious sample of soil cement | |
| CN112377237B (en) | Fully-surrounding fire extinguishing treatment method for smoldering fire area of coal gangue yard | |
| CN208140451U (en) | A kind of preparation facilities of the impervious sample of soil cement | |
| CN108444790A (en) | A kind of impervious sample production method of the soil cement of practicality | |
| CN103334446B (en) | Soil texture deep excavation side wall water burst plugging device and method | |
| CN106049465A (en) | Construction method for pile | |
| CN101949273B (en) | Method for plugging spring opening in drilling | |
| CN113136970A (en) | Outer wall screw hole plugging device and construction method | |
| CN210315518U (en) | Steel pipe micro pile | |
| CN208155689U (en) | A kind of impervious sample producing device of practical soil cement | |
| CN108396793A (en) | A kind of impervious sample production method of easy soil cement | |
| CN208155690U (en) | A kind of impervious sample producing device of soil cement | |
| CN102425434A (en) | Grouting construction method for completely weathered granite tunnel surrounding rock | |
| CN208201957U (en) | A kind of impervious sample producing device of easy soil cement | |
| CN108444892A (en) | A kind of impervious sample production method of the soil cement of simplicity | |
| CN208155802U (en) | A kind of impervious sample producing device of the soil cement of simplicity | |
| WO2017133373A1 (en) | Small-diameter pile cluster used for pile foundation, and method for construction thereof | |
| CN108398307A (en) | A kind of impervious sample production method of soil cement | |
| CN103924592B (en) | A kind of pressure-type PHA anchor pole and construction method thereof | |
| CN206928283U (en) | A kind of pile for prestressed pipe pile grouting constructing device | |
| CN110904955B (en) | Foundation reinforcing method | |
| CN214616582U (en) | Jacking construction reinforced concrete pipe grouting non-return device | |
| CN114411700A (en) | Steel pile body for steel pipe grouting pile construction while sinking pipe and grouting | |
| CN112144516A (en) | Construction method of concrete pile |
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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180824 |