CN107254882A - A kind of highly permeable scall Quick leak stoppage apparatus and blocking method - Google Patents
A kind of highly permeable scall Quick leak stoppage apparatus and blocking method Download PDFInfo
- Publication number
- CN107254882A CN107254882A CN201710624973.6A CN201710624973A CN107254882A CN 107254882 A CN107254882 A CN 107254882A CN 201710624973 A CN201710624973 A CN 201710624973A CN 107254882 A CN107254882 A CN 107254882A
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- Prior art keywords
- grout
- pipe
- scall
- highly permeable
- hole
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of highly permeable scall Quick leak stoppage apparatus and blocking method, device includes for the drilling tool for boring grout hole, combination floral tube and carries out sealed seal plug body to the aperture of grout hole after floral tube insertion grout hole for combining, combining floral tube includes at least one set of grout pipe group, every group of grout pipe group includes two grout pipes, the mouth of pipe closing of grout pipe lower end, and the aperture of grout hole is stretched out in upper end, grout pipe lower end surface or lower end side face are provided with grouting presbyopia, and the height for combining the lower surface of all grout pipes in floral tube is differed.Method includes：Bore grout hole and insert combination floral tube；The aperture of grout hole is poured using accelerated cement mortar；Each grout pipe is filled with cement-bentonite stable grout；To a grout pipe cement injection slurries in every group of grout pipe group, to another grout pipe priming petock glass pulp, make two kinds of slurries in highly permeable scall condensation by mixing filling space, quick blocking leakage passage.
Description
Technical field
The present invention relates to plasma pouring constructing skill field, more particularly to a kind of highly permeable scall Quick leak stoppage apparatus and stifled
Leakage method.
Background technology
In engineering construction, highly permeable scall is primarily referred to as native stone accumulation body, original overburden layer, native stone
Fill the big soil layer of the infiltration coefficients such as layer, there is water proof loading layer above general highly permeable scall, lower section have it is relative every
Water layer.For the seepage of highly permeable scall, it is more effective, succinct mode to take two-shot grouting technology impervious leakage-stopping,
Existing relatively advanced technology mainly has mini-valve tube two-shot grouting technology and the pure pressure type two-shot grouting technology of pipe laying shadoof, and both are double
Liquid grouting technique common feature is that single Grouting Pipe is used in hole, cement grout and waterglass slurries are both needed in slurry bucket,
The mouth of pipe or pipe in mixed, it is very high to Mortar mix proportion and human users' level requirement, it is careless slightly easily cause it is stifled
Pipe or range of scatter can not meet the defects such as impervious leakage-stopping requirement very well.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art there is provided one kind by cement grout and waterglass
In the earth formation mix, condense rapidly can quick blocking leakage passage highly permeable scall Quick leak stoppage apparatus and leak stopping side
Method.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of highly permeable scall Quick leak stoppage apparatus, including for boring the drilling tool of grout hole, combining floral tube and for group
Close and sealed seal plug body is carried out to the aperture of grout hole after the floral tube insertion grout hole, the combination floral tube includes at least one
Group grout pipe group, every group of grout pipe group includes two grout pipes, the closing of the grout pipe lower end mouth of pipe, and grout hole is stretched out in upper end
Aperture, the grout pipe lower end surface or lower end side face are provided with grouting presbyopia, all grout pipes in the combination floral tube
Height of the lower surface in the grout hole is differed.
It is used as the further improvement of above-mentioned technical proposal：
The grout hole passes through water proof loading layer, highly permeable scall, and extends to relative water resisting layer.
Lower surface highly minimum grout pipe extends to relative water resisting layer.
The device for plugging also includes being placed on the protection casing outside drilling tool during drilling.
The grout pipe upper end is provided with the grouting joint for being used for being connected with grouting pipeline.
The grout pipe is steel pipe or PRP pipes or PE pipes.
The length of each grout pipe is differed in the combination floral tube, and each grout pipe upper end is concordant, lower end edge grout hole
It is staggeredly arranged above and below depth.
A kind of blocking method of the highly permeable scall Quick leak stoppage apparatus based on described in any of the above-described, including it is following
Step：
S1, grout hole is drilled with, will be in combination floral tube insertion grout hole；
S2, the aperture for pouring using accelerated cement mortar grout hole form seal plug body；
S3, cement-each grout pipe of bentonite stable grout filling with high-consistency；
S4, to a grout pipe cement injection slurries in every group of grout pipe group, to another grout pipe priming petock glass pulp,
Make two kinds of slurries in highly permeable scall condensation by mixing filling space, quick blocking leakage passage.
It is used as the further improvement of above-mentioned technical proposal：
Before step S1 is carried out, each grout pipe is bundled into a branch of, upper end alignment, and the grouting presbyopia of grout pipe uses adhesive tape
Winding.
In step sl, protection casing is arranged while being drilled with grout hole outside drilling tool, after drilling terminates, drilling tool is taken out,
Protection casing is stayed in grout hole, when floral tube to be combined is along protection casing insertion grout hole, extracts protection casing.
Compared with prior art, the advantage of the invention is that：
The highly permeable scall Quick leak stoppage apparatus of the present invention, during grouting, a grout pipe is used to fill in every group of grout pipe group
Cementing slurries, another is used for priming petock glass pulp, and it is empty that two kinds of slurries are mixed and condensed in filling in highly permeable scall
Gap, quick blocking leakage passage is realized and fills the highly permeables such as layer pine to native stone accumulation body, original overburden layer, native stone
Dissipate stratum fast blockage；The present invention point make use of the loose big absorbent formation space of highly permeable it is big, it is connective good the characteristics of, cement mortar
Liquid and waterglass slurry are mixed in the earth formation, are condensed rapidly after being mixed in the loose bottom of highly permeable, have both been not in plugging phenomenon,
Again can be by adjusting the control of flow and pressure range of scatters of two kinds of slurries, it is ensured that quick effectively plugging effect；Meanwhile, overcome
Prior art cement grout and waterglass slurries are in slurry bucket, the mouth of pipe or pipe in mixed, easily cause plugging or
Range of scatter can not meet the defects such as impervious leakage-stopping requirement very well；In addition, requiring relatively low to operating personnel, it is only necessary to pass through
Brief training can meet site operation requirement.
The highly permeable scall rapid plugging method for fiberglass of the present invention, is equally had cement grout using above-mentioned device for plugging
Mixed in the earth formation with waterglass, condense it is rapid, can quick blocking leakage passage advantage.
Brief description of the drawings
Fig. 1 is the structural representation of Quick leak stoppage apparatus of the present invention.
Fig. 2 is the structural representation of combination floral tube in Quick leak stoppage apparatus of the present invention.
Fig. 3 is the structural representation of the grouting presbyopia of Quick leak stoppage apparatus of the present invention.
Fig. 4 is Quick leak stoppage apparatus drilling schematic diagram of the present invention.
Fig. 5 is the pre-buried combination floral tube schematic diagram of Quick leak stoppage apparatus of the present invention.
Fig. 6 is that Quick leak stoppage apparatus of the present invention fills combination floral tube schematic diagram temporarily.
Fig. 7 is Quick leak stoppage apparatus cement injection slurries of the present invention and waterglass slurries schematic diagram（One）.
Fig. 8 is Quick leak stoppage apparatus cement injection slurries of the present invention and waterglass slurries schematic diagram（Two）.
Fig. 9 is the flow chart of highly permeable scall rapid plugging method for fiberglass of the present invention.
Each label is represented in figure：
1st, grout hole；2nd, drilling tool；3rd, floral tube is combined；31st, grout pipe；311st, grouting presbyopia；312nd, bottom bulkhead；32nd, adhesive tape；4、
Seal plug body；51st, water proof loading layer；52nd, highly permeable scall；53rd, relative water resisting layer；6th, protection casing；7th, be in the milk pipeline；
8th, be in the milk joint；9th, grouting control valve.
Embodiment
The present invention is described in further detail below in conjunction with Figure of description and specific embodiment.
As shown in Figure 1 to Figure 3, the highly permeable scall Quick leak stoppage apparatus of the present embodiment, including for boring grout hole 1
Drilling tool 2, combination floral tube 3 and for sealedly being sealed to the aperture of grout hole 1 after combining the insertion grout hole 1 of floral tube 3
Stifled body 4, combination floral tube 3 includes at least one set of grout pipe group, and every group of grout pipe group includes two grout pipes 31, the lower end of grout pipe 31
The mouth of pipe is closed, and the aperture of grout hole 1 is stretched out in upper end, and the lower end surface of grout pipe 31 or lower end side face are provided with grouting presbyopia 311,
Height of the lower surface of all grout pipes 31 in grout hole 1 is differed.
In concrete application example, grouting presbyopia 311, this reality can be set in the lower end surface of grout pipe 31 or lower end side face
Apply in example, the lower end surface of grout pipe 31 is blocked by bottom bulkhead 312, grouting presbyopia 311 is arranged on the side face of lower end, beneficial to slurry
Liquid enters highly permeable scall 52.
In the present embodiment, two groups of grout pipe groups are set, every group of grout pipe group includes the different grout pipe 31 of two pairs of length, one
Individual to be used for cement injection slurries A, another is used for priming petock glass pulp B.The length of four grout pipes 31 is differed, each to fill
Starch and be staggeredly arranged above and below the alignment of the upper end of pipe 31, the depth of lower end edge grout hole 1（Namely four grout pipes 31 are in grout hole 1
Height is differed）, sufficiently uniformly enter highly permeable scall 52 beneficial to slurries.
Using the Quick leak stoppage apparatus of the present embodiment, during grouting, a grout pipe 31 is used to irrigate in every group of grout pipe group
Cement grout A, another is used for priming petock glass pulp B, and two kinds of slurries are mixed and condensed in filling in highly permeable scall 52
Space, quick blocking leakage passage is realized and fills the highly permeables such as layer to native stone accumulation body, original overburden layer, native stone
Scall fast blockage.The present invention take full advantage of the loose big absorbent formation space of highly permeable it is big, it is connective good the characteristics of, water
Slurry liquid A and waterglass slurry B are mixed in the earth formation, are condensed rapidly after being mixed in highly permeable scall 52, are both not in
Plugging phenomenon；Meanwhile, overcome prior art cement grout and waterglass slurries in slurry bucket, the mouth of pipe or pipe in mixed
Close, the defects such as impervious leakage-stopping requirement can not be met very well by easily causing plugging or range of scatter；In addition, requiring operating personnel
It is relatively low, it is only necessary to can to meet site operation requirement by brief training.
In the present embodiment, grout hole 1 passes through water proof loading layer 51, highly permeable scall 52, and extends to relative water proof
Layer 53.The insertion relative water resisting layer 53 of grout hole 1 about 1m~2m, the length of most long grout pipe 31 is more than the depth of grout hole 1,
That is lower surface highly minimum grout pipe 31 extends to relative water resisting layer 53, it is ensured that most long grout pipe 31 is loose through highly permeable
Stratum 52, so that it is guaranteed that the bottom of highly permeable scall 52 can be in the milk.
In the present embodiment, device for plugging also includes being placed on the protection casing 6 outside drilling tool 2 during drilling.Drilling tool 2 is in drilling
When, protection casing 6 is enclosed on outside drilling tool 2, advanced simultaneously with drilling tool 2.After drilling terminates, drilling tool 2 is taken out, protection casing 6 is stayed in
In grout hole 1, when floral tube 3 to be combined is along the insertion grout hole 1 of protection casing 6, protection casing 6, protection combination floral tube 3 are extracted.
In the present embodiment, the upper end of grout pipe 31 is provided with the grouting joint 8 for being used for being connected with grouting pipeline 7.Be in the milk joint 8
Provided with grouting control valve 9 between grouting pipeline 7.Two kinds of slurries are irrigated by independent grouting pipeline 7.
In concrete application example, grout pipe 31 is steel pipe or PRP pipes or PE is managed or other can bear certain grouting pressure
The tubing of power.In the present embodiment, grout pipe 31 is steel pipe, after grouting terminates, and grout pipe 31 is embedded in the earth formation.Combine floral tube 3
Material is disposable, relative to blender special in the prior art（In aperture or hole）, mini-valve tube, two-shot grouting core
Pipe, grouting nozzle etc., process easy maintenance, and in the market is easy to purchase and cheap, it is easy to realize that large area is quickly applied
Work.
As shown in Fig. 4 to Fig. 9, highly permeable scall rapid plugging method for fiberglass of the invention comprises the following steps：
S1, grout hole 1 is drilled with, combination floral tube 3 is inserted in grout hole 1；
S2, the aperture for pouring using accelerated cement mortar grout hole 1 form seal plug body 4；
S3, each grout pipe 31 of cement-bentonite stable grout C fillings with high-consistency；
S4, to a cement injection slurries A of grout pipe 31 in every group of grout pipe group, to another priming petock glass paste of grout pipe 31
Liquid B, makes two kinds of slurries in the condensation by mixing filling of highly permeable scall 52 space, quick blocking leakage passage.
Each grout pipe 31 is filled using the cement-bentonite stable grout C of high-consistency, so as to ensure each grout pipe before grouting
31 are filled, during grouting, when most long grout pipe 31 is in the milk, and other grout pipes 31 are not when being in the milk, it is to avoid slurries are never filled
The grouting presbyopia 311 of the grout pipe 31 of slurry enters, so as to block presbyopia 311 of not being in the milk.Using the technology to highly permeable loosely
Layer 52 carries out impervious leakage-stopping two-shot groutings, and filling process does not need rig to coordinate, and does not need special two-shot grouting pump,
Large area rapid construction used device relative populations are few and are worth low.
In concrete application example, in every group of grout pipe group, the relatively low grout pipe 31 in lower surface can cement injection slurries A or
Waterglass slurries B, the present embodiment, by taking the relatively low cement injection slurries A of grout pipe 31 in lower surface as an example, because lower surface is relatively low
The grouting presbyopia 311 of the grouting presbyopia 311 of grout pipe 31 grout pipe 31 higher less than lower surface, it is ensured that cement grout A
It is sufficiently mixed from top to bottom with waterglass slurries B, accelerates to condense filling space, quick blocking leakage passage.
Carry out step S1 before, at least two grout pipes 31 are bundled into it is a branch of, in the present embodiment, by two groups four fill
Slurry pipe 31 is bundled into a branch of, upper end alignment, and the grouting presbyopia 311 of grout pipe 31 is wound always using adhesive tape 32.The adhesive tape 32
In grouting, it can be punctured by slurries.The adhesive tape 32 is used to protect grouting presbyopia 311, it is to avoid grouting presbyopia 311 is not in the milk for a long time
When block.
In step sl, protection casing 6 is arranged while being drilled with grout hole 1 outside drilling tool 2, after drilling terminates, takes out and bores
Tool 2, protection casing 6 is stayed in grout hole 1, when floral tube 3 to be combined is along the insertion grout hole 1 of protection casing 6, extracts protection casing 6.
In concrete application example, two groups of grout pipes 31 of combination floral tube 3 can be in the milk simultaneously, can also separate and be in the milk, i.e., and one
It is secondary to fill one group, filling another group after one group of filling is complete.In the present embodiment, two groups of grout pipe groups are in the milk simultaneously.
Although the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with ability
The technical staff in domain, in the case where not departing from technical solution of the present invention scope, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible variations and modification, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every
Without departing from the content of technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments,
Equivalent variations and modification, all should fall in the range of technical solution of the present invention protection.
Claims (10)
1. a kind of highly permeable scall Quick leak stoppage apparatus, it is characterised in that：Including for boring grout hole（1）Drilling tool（2）、
Combine floral tube（3）And for combining floral tube（3）Insert the grout hole（1）Afterwards to grout hole（1）Aperture carry out it is sealed
Seal plug body（4）, the combination floral tube（3）Including at least one set of grout pipe group, every group of grout pipe group includes two grout pipes
（31）, the grout pipe（31）Lower end mouth of pipe closing, and grout hole is stretched out in upper end（1）Aperture, the grout pipe（31）Lower end
End face or lower end side face are provided with grouting presbyopia（311）, the combination floral tube（3）In all grout pipes（31）Lower surface in institute
State grout hole（1）Interior height is differed.
2. highly permeable scall Quick leak stoppage apparatus according to claim 1, it is characterised in that：The grout hole（1）
Through water proof loading layer（51）, highly permeable scall（52）, and extend to relative water resisting layer（53）.
3. highly permeable scall Quick leak stoppage apparatus according to claim 2, it is characterised in that：Lower surface is highly minimum
Grout pipe（31）Extend to relative water resisting layer（53）.
4. highly permeable scall Quick leak stoppage apparatus according to claim 1, it is characterised in that：The device for plugging is also
Drilling tool is placed on during including drilling（2）Outside protection casing（6）.
5. the highly permeable scall Quick leak stoppage apparatus according to Claims 1-4 any one, it is characterised in that：Institute
State grout pipe（31）Upper end, which is provided with, to be used for and grouting pipeline（7）The grouting joint of connection（8）.
6. the highly permeable scall Quick leak stoppage apparatus according to Claims 1-4 any one, it is characterised in that：Institute
State grout pipe（31）For steel pipe or PRP pipes or PE pipes.
7. the highly permeable scall Quick leak stoppage apparatus according to Claims 1-4 any one, it is characterised in that：Institute
State combination floral tube（3）In each grout pipe（31）Length differ, each grout pipe（31）Upper end is concordant, lower end edge grout hole
（1）Depth above and below be staggeredly arranged.
8. a kind of blocking method of the highly permeable scall Quick leak stoppage apparatus based on described in claim 1 to 7 any one,
It is characterised in that it includes following steps：
S1, it is drilled with grout hole（1）, floral tube will be combined（3）Insert grout hole（1）It is interior；
S2, grout hole poured using accelerated cement mortar（1）Aperture formed seal plug body（4）；
S3, each grout pipe of cement-bentonite stable grout filling with high-consistency（31）；
S4, to a grout pipe in every group of grout pipe group（31）Cement injection slurries, to another grout pipe（31）Priming petock
Glass pulp, makes two kinds of slurries in highly permeable scall（52）Condensation by mixing filling space, quick blocking leakage passage.
9. highly permeable scall rapid plugging method for fiberglass according to claim 8, it is characterised in that carry out step S1 it
Before, by each grout pipe（31）It is bundled into a branch of, upper end alignment, and grout pipe（31）Grouting presbyopia（311）Using adhesive tape（32）
Winding.
10. highly permeable scall rapid plugging method for fiberglass according to claim 8, it is characterised in that：In step sl, bore
If grout hole（1）While in drilling tool（2）It is arranged protection casing outside（6）, after drilling terminates, take out drilling tool（2）, protection casing
（6）Stay in grout hole（1）It is interior, floral tube to be combined（3）Along protection casing（6）Insert grout hole（1）When, extract protection casing（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624973.6A CN107254882B (en) | 2017-07-27 | 2017-07-27 | Rapid plugging device and method for high-permeability unconsolidated formation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624973.6A CN107254882B (en) | 2017-07-27 | 2017-07-27 | Rapid plugging device and method for high-permeability unconsolidated formation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107254882A true CN107254882A (en) | 2017-10-17 |
| CN107254882B CN107254882B (en) | 2022-11-18 |
Family
ID=60026078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710624973.6A Active CN107254882B (en) | 2017-07-27 | 2017-07-27 | Rapid plugging device and method for high-permeability unconsolidated formation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107254882B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111775298A (en) * | 2020-07-07 | 2020-10-16 | 上海建工四建集团有限公司 | Method for pouring concrete of prefabricated stand column |
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|---|---|---|---|---|
| JP2000212961A (en) * | 1999-01-22 | 2000-08-02 | East Japan Railway Co | Construction method for cast-in-place concrete pile |
| CN103132526A (en) * | 2013-03-15 | 2013-06-05 | 中国水利水电第七工程局成都水电建设工程有限公司 | Two-fluid-process grouting plug and grouting method using the same |
| CN103145381A (en) * | 2013-03-14 | 2013-06-12 | 中国水利水电第七工程局成都水电建设工程有限公司 | Double-liquid process grouting material and grouting process using grouting material |
| CN103362548A (en) * | 2013-07-09 | 2013-10-23 | 淮南矿业(集团)有限责任公司 | Grouting device |
| CN105386435A (en) * | 2015-12-07 | 2016-03-09 | 中交第三航务工程局有限公司南京分公司 | Double-liquid grouting system used for cement and water glass solution and construction process of double-liquid grouting system |
| CN105951749A (en) * | 2016-05-11 | 2016-09-21 | 中国水利水电第十四工程局有限公司 | Construction method for reinforcement treatment of soft foundation steel pipe pile in confined space |
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2017
- 2017-07-27 CN CN201710624973.6A patent/CN107254882B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000212961A (en) * | 1999-01-22 | 2000-08-02 | East Japan Railway Co | Construction method for cast-in-place concrete pile |
| CN103145381A (en) * | 2013-03-14 | 2013-06-12 | 中国水利水电第七工程局成都水电建设工程有限公司 | Double-liquid process grouting material and grouting process using grouting material |
| CN103132526A (en) * | 2013-03-15 | 2013-06-05 | 中国水利水电第七工程局成都水电建设工程有限公司 | Two-fluid-process grouting plug and grouting method using the same |
| CN103362548A (en) * | 2013-07-09 | 2013-10-23 | 淮南矿业(集团)有限责任公司 | Grouting device |
| CN105386435A (en) * | 2015-12-07 | 2016-03-09 | 中交第三航务工程局有限公司南京分公司 | Double-liquid grouting system used for cement and water glass solution and construction process of double-liquid grouting system |
| CN105951749A (en) * | 2016-05-11 | 2016-09-21 | 中国水利水电第十四工程局有限公司 | Construction method for reinforcement treatment of soft foundation steel pipe pile in confined space |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111775298A (en) * | 2020-07-07 | 2020-10-16 | 上海建工四建集团有限公司 | Method for pouring concrete of prefabricated stand column |
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| Publication number | Publication date |
|---|---|
| CN107254882B (en) | 2022-11-18 |
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