CN109811760A - A kind of method that high polymer PFA reinforces South Sea coral sand ground - Google Patents
A kind of method that high polymer PFA reinforces South Sea coral sand ground Download PDFInfo
- Publication number
- CN109811760A CN109811760A CN201910099269.2A CN201910099269A CN109811760A CN 109811760 A CN109811760 A CN 109811760A CN 201910099269 A CN201910099269 A CN 201910099269A CN 109811760 A CN109811760 A CN 109811760A
- Authority
- CN
- China
- Prior art keywords
- high polymer
- pfa
- coral sand
- parts
- polymer pfa
- 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
Abstract
The present invention relates to coral sand field of foundation treatment, and in particular to a kind of method that high polymer PFA reinforces South Sea coral sand ground.With a kind of novel high polymer material PFA, diluent and retarder is added, effectively solves the problems, such as that high polymer PFA solidification is fast, concrete castability is poor, high polymer PFA is injected into coral sand ground, greatly improves foundation bearing capacity.Its construction method is characterized in that: being pumped with a kind of super-pressure PFA, it constructs in conjunction with drill bit positioning drilling machine with holes, drilling machine directed drilling first, after being drilled into predetermined depth, high polymer PFA mixed liquor is prepared, drill bit is delivered to by super-pressure pump, starts whirl spraying high polymer PFA mixed liquor, it is promoted in whirl spraying, when being promoted to designed elevation, whirl spraying terminates.The present invention has the advantages that consolidation effect is good, construction is simple, cheap, the working life of high polymer PFA is extended, can be widely used for the reinforcing of South Sea coral sand ground.
Description
Technical field
The invention belongs to coral sand field of foundation treatment, and in particular to a kind of high polymer PFA reinforcing South Sea coral sand ground
Method.
Background technique
Coral reef is growth of the thousands of anthozoic bone being made of calcium carbonate in centuries to thousands of years
It is formed in journey, is the important source of resource.Therefore, the reinforcing for carrying out coral sand ground has great significance.
Common coral sand method for processing foundation has: vacuum method, bored cast-in-situ pile, heavy-tamping method etc., still, due to the South Sea
The features such as coral sand ground is easily broken, high compression, in addition the presence of inner pore, so that sandy subgrade is easy to generate vibration liquid
Change, causes Foundation Treatment Effect undesirable.
Polyurethane foam adhesive (Polyurethane Foam Adhesive, PFA) is one kind of high polymer, is had light
Matter, it is high-strength, dilatancy is good, cohesion is strong the features such as, after polyurethane is grouted into the gap of the soil body, foam volume is expanded,
So that the soil body is formed irregular non-individual body or discontinuum, improve soil particle cohesion, to correct differential settlement, improve
Bearing capacity and anti-permeability performance etc..
As patent CN201310754665.7 discloses a kind of environment-friendly aqueous polyurethane grouting and water plugging material and its preparation
Method, suitable for the underground engineerings such as mine working, vertical shaft quick water blockoff and filling inbreak hole, grouting for water blocking material by
It is obtained after component A and component B mixing, although the material has rapidly and efficiently, feature easy for construction, inventor's discovery: because
Its gel time is shorter, is not particularly suited for the reinforcing to South Sea coral sand ground, and the higher environment temperature in the South Sea makes polyurethane
The temperature of adhesive increases, and viscosity becomes larger, and curing rate is fast, and setting time is short, also has little time to have cohered itself just with soil particle
Solidification.
In paper " high polymer gelling stockpile moves residual deformation properties experimental study ", a kind of high polymer gelling heap is proposed
Building stones reinforcement technique can significantly improve stockpile intensity, and effectively reduce the permanent deformation of stockpile under dynamic load, but send out
Bright people's discovery: the high polymer reinforcement technique is suitable for the biggish Reinforcement of Earth Rockfill Dam of material voids such as stockpile, for storeroom sky
For the lesser coral sand of gap, setting time is short, does not have concrete castability, therefore cannot be used for reinforcing South Sea ground.
Summary of the invention
It is an object of the invention to overcome the problems, such as coral sand foundation stabilization, provide a kind of for reinforcing South Sea coral sand
The advantages that method of ground has consolidation effect good, construction is simple, cheap, can effectively promote foundation bearing capacity, can be wide
The general reinforcing for South Sea coral sand ground.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
A kind of reinforcing South Sea coral sand ground high polymer PFA mixed liquor, is composed of the following raw materials in parts by weight, high polymer
65~75 parts of PFA, 30~40 parts of diluent, 2~5 parts of retarder；
The research of the invention finds that: polyurethane foam adhesive concrete castability is poor, solidification is fast, will be not added with slow setting in the lab
The high polymer PFA of agent and diluent is mixed with coral sand, has just solidified (such as Fig. 4) within 1~2 minute.But high polymer PFA is to environment
It is required that very high, especially at the South Sea, higher environment temperature makes the temperature of adhesive excessively high, leads to adhesive curing rate
Accelerate, also have little time to cohere itself with soil particle and just solidified, does not have concrete castability.Therefore, the present invention is in high polymer PFA,
Retarder, diluent is added simultaneously, it is mixed with coral sand effectively to regulate and control high polymer PFA by the coordinated of the two
Gel time, viscosity, dilation angle and concrete castability overcome this problem, so that the applicability of high polymer PFA is remarkably reinforced,
Coral sand ground can sufficiently be reinforced.
At present there are many kinds of high polymer grouting material, technical characteristics are lightweight, early strong, high-expansion.The present invention
Research is found: high polymer PFA, since-the NCO in urethane adhesive strand can contain with a variety of of coral sand foundation surface
The functional group reactions of active hydrogen form interfacial bond and combine.Therefore, there is extremely strong adhesiveness to coral sand ground, with it
His high polymer grouting material is compared, and high polymer PFA adhesion strength is high, toughness is big, adhesive force is strong, with very excellent resistance to
Mill property, weatherability and resistance to ag(e)ing, can preferably meet the requirement of South Sea coral sand foundation stabilization.
In some embodiments, the diluent be one of dimethylbenzene, acetone, ethyl acetate or a variety of, preferably two
Toluene；The research of the invention finds that: compared with other diluents, dimethylbenzene can effectively slow down the gelation rate of high polymer PFA, increase
Add dilation angle in the earth formation；Acetone is significant to the effect for reducing viscosity, and induration made from it is impervious, compressive property
It is good；Ethyl acetate has excellent dissolubility and quick-drying, in view of the difference in the effect of various diluents, using several dilutions
Agent combined effect is more preferable.
In some embodiments, the retarder is benzene；The research of the invention finds that: compared with other retarder, benzene conduct
Have that dosage is few, effect is significant when retarder is compounded with high polymer PFA, and not with high polymer PFA hair at reacting the characteristics of, can
The setting time for effectively delaying high polymer PFA, improves its concrete castability.
In some embodiments, described to be composed of the following raw materials in parts by weight, 65~70 parts of high polymer PFA, diluent 30
~35 parts, 2~3.5 parts of retarder.
In some embodiments, described to be composed of the following raw materials in parts by weight, 70~75 parts of high polymer PFA, diluent 35
~40 parts, 3.5~5 parts of retarder.
The present invention also provides the preparation sides of any above-mentioned reinforcing South Sea coral sand ground high polymer PFA mixed liquor
Method, comprising:
70~75 parts of high polymer PFA, diluent, retarder are successively mixed, after mixing evenly to get.
The present invention also provides a kind of methods that high polymer PFA reinforces South Sea coral sand ground, comprising:
1) coral sand ground is carried out smooth；
2) arrangement hole position on coral sand ground, running fix drilling machine to designated position, drilling rod head are directed at hole location center, together
When flatten drilling machine；
3) drilling machine rotary drilling is positioned, until sinking down into projected depth；
4) any above-mentioned high polymer PFA mixed liquor of whirl spraying, is promoted, the whirl spraying knot when being promoted to designed elevation in whirl spraying
Beam；
5) drill bit drilling rod is rinsed, the remaining high polymer PFA in whole pipelines is cleaned；
6) positioning drilling machine is moved into next hole location, and repeats step (2)~(5), carry out the construction of next hole location.
In some embodiments, the perpendicularity deviation of drilling rod is not more than 2%~3%.
In some embodiments, high polymer PFA mixed liquor is delivered to drill bit spray-hole through super-pressure pump.
In some embodiments, the high polymer PFA mixed liquor is ejected with the high pressure of 30~50MPa from whirl spraying hole.
The present invention also provides the devices that a kind of high polymer PFA reinforces South Sea coral sand ground, comprising: super-pressure PFA pump,
Drilling machine, drilling rod, drill bit, the super-pressure PFA pump are connected by conveyance conduit with drilling machine, and the front end of the drilling machine is provided with brill
Bar, the front end of the drilling rod are provided with drill bit, are provided with whirl spraying hole and runner on the drill bit, and the conveyance conduit is from drilling rod
Inside passes through, and is connected with the whirl spraying hole on drill bit.
In some embodiments, the super-pressure PFA pump is also connected with blender.
The present invention also provides application of any above-mentioned high polymer PFA mixed liquor in grouting and reinforcing.
The beneficial effects of the present invention are:
Foundation stabilization effect of the invention is good, construction is simple, cheap, and high polymer PFA is not vulnerable to objective factor
It influences, property is stablized, to the flatness of construction site without particular/special requirement.In addition, selected high polymer PFA material has lightweight, height
The features such as intensity, dilatancy are good, cohesion is strong, by the way that retarder and diluent is added, effectively solve high polymer PFA solidification it is fast,
The problem of concrete castability difference, extends its working life, can effectively reinforce coral sand ground.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.
Fig. 1 is the high polymer PFA consolidated subsoil schematic diagram of embodiment 2.
Fig. 2 is that the high polymer PFA of embodiment 2 reinforces South Sea coral sand foundation construction flow chart.
Fig. 3 is the positioning drill bit of drilling machine drawing of embodiment 2.
Fig. 4 is that the high polymer PFA of embodiment 4 and coral sand admix 20 minutes surface cure figures.
Fig. 5 is the coral sand unconfined compressive strength of embodiment 1 and the relational graph of PFA volume.
Fig. 6 is original state coral sand stress-strain curve under the different confining pressures of embodiment 1.
Fig. 7 mixes and stirs the stress-strain curve of coral sand for PFA under the different confining pressures of embodiment 1.
Wherein: 1- super-pressure PFA pump, 2- drilling machine, 3- conveyance conduit, 4- drilling rod, 5- drill bit, 6- blender, 7 retarder, 8
Diluent, 9 high polymer PFA, 10- whirl spraying holes.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the present invention.Unless another
It indicates, all technical and scientific terms that the present invention uses have and general technical staff of the technical field of the invention
Normally understood identical meanings.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular shape
Formula be also intended to include plural form, additionally, it should be understood that, when in the present specification use term "comprising" and/or
When " comprising ", existing characteristics, step, operation, device, component and/or their combination are indicated.
It is very high to environmental requirement for current high polymer PFA as background technique is introduced, especially at the South Sea, compared with
High environment temperature makes the temperature of adhesive excessively high, causes adhesive curing rate to be accelerated, also has little time to cohere with soil particle
Itself has just been solidified, and does not have the problem of concrete castability.Therefore, the present invention proposes that a kind of high polymer PFA reinforces South Sea coral sandy ground
The method of base, including following procedure:
(1) simple smooth, the removable obstacle in removing ground and underground is carried out to coral sand ground；
(2) arrangement hole position on coral sand ground, running fix drilling machine to designated position, drilling rod head are directed at hole location center,
Drilling machine is flattened simultaneously, is placed steadily, and the perpendicularity deviation of drilling rod is not more than 2%~3%；
(3) positioning drilling machine is opened, bit is crept into, until sinking down into projected depth；
(4) any above-mentioned high polymer PFA mixed liquor is prepared in stirrer for mixing；
(5) high polymer PFA mixed liquor is delivered to drill bit spray-hole by pipeline by super-pressure PFA pump, and it is poly- to start whirl spraying height
Object PFA is promoted in whirl spraying, and when being promoted to designed elevation, whirl spraying terminates.
(6) rod bit is rinsed well, cleans the remaining high polymer PFA in whole pipelines, prevents from blocking.
(7) positioning drilling machine is moved into next hole location, and repeats step (2)~(7), carry out the construction of next hole location.
The present invention injects high polymer PFA in coral sand ground, and foam volume expands, and forms the soil body irregular
Non-individual body or discontinuum enhance soil particle cohesion, foundation bearing capacity are improved, to achieve the purpose that consolidated subsoil.
In some embodiments, the group of high polymer material PFA mixed liquor becomes 65~75 parts of high polymer PFA, diluent 30
~40 parts, 2~5 parts of retarder after being drilled into predetermined depth, that is, start the match ratio mixing high polymer PFA mixing determining by design
Liquid, first by high polymer PFA be added blender in, add diluent, be eventually adding retarder, start blender stirring 2~
3 minutes, it is uniformly mixing to obtain high polymer PFA mixed liquor.
In some embodiments, step 5 opens agitator bottom valve, makes to mix after preparing high polymer PFA mixed liquor
It closes liquid stream to enter in super-pressure pump, high polymer PFA mixed liquor is delivered to drill bit spray-hole by pipeline by super-pressure pump, is made high poly-
Object PFA mixed liquor is ejected with the high pressure of 30~50MPa from whirl spraying hole, and drilling rod, high polymer PFA mixing are promoted in whirl spraying
After liquid is into the gap of the soil body, foam volume is expanded, and the soil body is made to form irregular non-individual body or discontinuum, is improved
Soil particle cohesion corrects differential settlement, improves bearing capacity and anti-permeability performance.
Gel time refers in the application: the presetting period of high polymer PFA, it may be assumed that surface drying time.
With reference to the accompanying drawings, invention is further described in detail in conjunction with the embodiments, of the invention to be completely understood by
Purpose, design and advantage.
In following embodiment, high polymer (PFA) uses one-component polyurethane foam adhesive, has purchased from Anhui surrounding building materials
Limit company, specification are A4 (900 grams) gun barrel one, trade name: polyurethane foams.
Embodiment 1
In laboratory, consolidation process is carried out to South Sea calcareous sand using high polymer (PFA), utilizes TSZ-3 type strain controlling
Formula triaxial apparatus, the calcareous sand for mixing and stirring front and back to high polymer carry out unconfined compression strength test, study PFA content to its intensity
Influence；By not consolidating undrained shear strength test, influence of the PFA to calcareous sand static characteristics is analyzed.
Indoor static(al) triaxial test instrument uses TSZ-3 type strain controlling formula triaxial apparatus, and maximum axial load is 30kN, encloses
Pressure is 0~2.0MPa, controls error ± 1%FS.The specimen finish of triaxial test is 39.1mm, is highly 80mm, axial strain
Loading speed uses 1.0mm/min.
It tests calcareous sand used and is derived from South China Sea islands and reefs surrounding waters, take appropriate sand sample to sieve after natural air drying and take
Particle between 0.25~5 mm surveys its particle diameter distribution according to sieve method, wherein ratio contained by 2~5mm is maximum, it is 61.77%；
1~2mm takes second place, and is 33.0%；0.5~1mm and difference accounting less than 0.5mm are 4.65% and 0.58%.
High polymer PFA is+5~+35 DEG C using temperature, and heatproof is -30~+80 DEG C after solidification, and surface drying time is 5 minutes left sides
The right side can be cut after 30 minutes, and foam curing after 1h, 3~5h reaches stable, harmless after solidification.
Pass through unconfined compression strength test and indoor triaxial shear test, research coral sand unconfined compressive strength and height
Original state coral sand and high polymer PFA mix and stir coral sand stress-under the relationship (such as Fig. 5) of polymers PFA volume, and different confining pressures
Strain curve (such as Fig. 6 and Fig. 7).The result shows that after high polymer PFA is mixed coral sand, raising coral that can be relatively stable
Sand unconfined compressive strength is effectively improved its compressive property；While intensity significantly improves, occur " small strain, big stress "
The characteristics of, show that PFA mixes and stirs coral sand and can play maximum shear behavior under lesser deformation.
Embodiment 2
The present embodiment discloses a kind of method that high polymer PFA reinforces South Sea coral sand ground, comprising the following steps:
1) simple smooth, the removable obstacle in removing ground and underground is carried out to coral sand ground；
2) arrangement hole position on coral sand ground, running fix drilling machine to designated position, drilling rod head are directed at hole location center, together
When flatten drilling machine, place steady, the perpendicularity deviation of drilling rod is not more than 2%~3%；
3) drilling machine rotary drilling is positioned, until sinking down into projected depth；
4) 65~75 parts of high polymer PFA are first added in blender, is then added 30 parts of dimethylbenzene, is eventually adding benzene 5
Part, blender is uniform, forms high polymer PFA mixed liquor；
5) high polymer PFA mixed liquor is delivered to drill bit spray-hole by pipeline by super-pressure PFA pump, starts whirl spraying high polymer
PFA is promoted in whirl spraying, and when being promoted to designed elevation, whirl spraying terminates；
6) rod bit is rinsed well, cleans the remaining high polymer PFA in whole pipelines, prevents from blocking；
7) positioning drilling machine is moved into next hole location, and repeats step (2)~(7), carry out the construction of next hole location；
As a result, it has been found that being to reinforce coral sand using high polymer PFA in the case that dimethylbenzene retarder is benzene in diluent
Ground achieves good result: after high polymer PFA is injected into the gap of coral sand ground, foam volume is expanded, and is made
The soil body forms irregular non-individual body or discontinuum, improves soil particle cohesion, and the induration adhesion strength of generation is high, tough
Property is big, improves resistance to compression, the shear behavior of coral sand；Simultaneously as the addition of diluent and retarder, high polymer PFA's is solidifying
Glue speed slows down significantly, and gel time is about 60min, and viscosity is significantly reduced, about 400mPas, effectively extends high poly-
The working life of object PFA increases the dilation angle of high polymer PFA in the earth formation, improves the concrete castability of high polymer PFA.
Embodiment 3
The present embodiment discloses a kind of method that high polymer PFA reinforces South Sea coral sand ground, comprising the following steps:
1) simple smooth, the removable obstacle in removing ground and underground is carried out to coral sand ground；
2) arrangement hole position on coral sand ground, running fix drilling machine to designated position, drilling rod head are directed at hole location center, together
When flatten drilling machine, place steady, the perpendicularity deviation of drilling rod is not more than 2%~3%；
3) drilling machine rotary drilling is positioned, until sinking down into projected depth；
4) 65~75 parts of high polymer PFA are first added in blender, is then added 30 parts of dimethylbenzene, blender is uniform, shape
At high polymer PFA mixed liquor；
5) high polymer PFA mixed liquor is delivered to drill bit spray-hole by pipeline by super-pressure PFA pump, starts whirl spraying high polymer
PFA is promoted in whirl spraying, and when being promoted to designed elevation, whirl spraying terminates；
6) rod bit is rinsed well, cleans the remaining high polymer PFA in whole pipelines, prevents from blocking；
7) positioning drilling machine is moved into next hole location, and repeats step (2)~(7), carry out the construction of next hole location；
As a result, it has been found that gel time is about 5min, and viscosity is substantially reduced, about in the case where only adding diluent dimethylbenzene
For 400mPas, the working life of high polymer PFA is effectively extended, the dilation angle of high polymer PFA in the earth formation is increased, mentions
The high concrete castability of high polymer PFA.
Embodiment 4
Construction method is same as Example 2, the difference is that diluent and retarder are not added.
1) smooth, the removable obstacle in removing ground and underground is carried out to coral sand ground；
2) arrangement hole position on coral sand ground, running fix drilling machine to designated position, drilling rod head are directed at hole location center, together
When flatten drilling machine, place steady, the perpendicularity deviation of drilling rod is not more than 2%~3%；
3) drilling machine rotary drilling is positioned, until sinking down into projected depth；
4) the high polymer PFA of diluent and retarder is not added for whirl spraying, is promoted in whirl spraying, when being promoted to designed elevation
Whirl spraying terminates；
5) drill bit drilling rod is rinsed, the remaining high polymer PFA in whole pipelines is cleaned；
6) positioning drilling machine is moved into next hole location, and repeats step (2)~(5), carry out the construction of next hole location.
As a result, it has been found that the high polymer PFA that whirl spraying goes out is very sticky in the case where diluent and retarder are not added, and
Setting time is short, is not sufficiently mixed that itself is just cured with grogs, does not have concrete castability, can not to South Sea coral sand ground into
Row is reinforced, as shown in Figure 4.
Embodiment 5
Construction method is same as Example 2, the difference is that diluent is acetone.
As a result, it has been found that compared with Example 2: high polymer PFA viscosity further drops in the case where diluent is acetone
It is low, about 300mPas, but the gelation rate of high polymer PFA becomes faster, and is 30min or so, the expansion of high polymer PFA in the earth formation
Scattered radius decreases, and diluent acetone is lower than embodiment 2 to the improvement of high polymer PFA concrete castability.
Embodiment 6
Construction method is same as Example 2, the difference is that diluent is ethyl acetate.
As a result, it has been found that in the case where diluent is ethyl acetate, compared with Example 2: high polymer PFA, ethyl acetate
It is stirred with benzene three and is easier to realize；But the gelation rate of high polymer PFA mixed liquor is about 45min, and viscosity is about
500mPas, ethyl acetate diluent is to the concrete castability of high polymer PFA, and diffusible improvement is lower than in the earth formation
Embodiment 2.
Embodiment 7
Construction method is same as Example 2, the difference is that diluent is by 20 parts of dimethylbenzene, 5 parts of acetone, ethyl acetate
5 parts mix.
As a result, it has been found that in the case where diluent is 3 kinds of dimethylbenzene, acetone and ethyl acetate diluent combinations: Gao Ju
The gelation rate of object PFA mixed liquor slows down better effect, and gel time is 80min or so, while high polymer PFA mixed liquor
Viscosity is reduced to 350mPas or so, can effectively extend the working life of high polymer PFA, improve the concrete castability of high polymer PFA,
Increase the dilation angle of high polymer PFA in the earth formation, therefore more preferable using several diluent combined effects.
Finally it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not limited to this hair
It is bright, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, according to
It can so modify to technical solution documented by previous embodiment, or part is equivalently replaced.It is all this
Within the spirit and principle of invention, any modification, equivalent replacement, improvement and so on should be included in protection model of the invention
Within enclosing.Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art
The various modifications or changes that can be made are not needed to make the creative labor still within protection scope of the present invention.
Claims (11)
1. a kind of reinforcing South Sea coral sand ground high polymer PFA mixed liquor, which is characterized in that by the raw material group of following parts by weight
At 65~75 parts of high polymer PFA, 30~40 parts of diluent, 2~5 parts of retarder；
The high polymer PFA is wet-solidifying single-component polyurethane adhesive；
The diluent is one of dimethylbenzene, acetone, ethyl acetate or a variety of；
The retarder is benzene.
2. mixed liquor as described in claim 1, which is characterized in that described to be composed of the following raw materials in parts by weight, high polymer PFA
65~70 parts, 30~35 parts of diluent, 2~3.5 parts of retarder.
3. mixed liquor as described in claim 1, which is characterized in that described to be composed of the following raw materials in parts by weight, high polymer PFA
70~75 parts, 35~40 parts of diluent, 3.5~5 parts of retarder.
4. the described in any item preparation methods for reinforcing South Sea coral sand ground high polymer PFA mixed liquor of claim 1-3,
It is characterized in that, comprising:
70~75 parts of high polymer PFA, diluent, retarder are successively mixed, after mixing evenly to get.
5. a kind of method that high polymer PFA reinforces South Sea coral sand ground characterized by comprising
1) coral sand ground is carried out smooth；
2) arrangement hole position on coral sand ground, running fix drilling machine to designated position, drilling rod head are directed at hole location center, while whole
Horizontal drill machine；
3) drilling machine rotary drilling is positioned, until sinking down into projected depth；
4) the described in any item high polymer PFA mixed liquors of whirl spraying claim 1-3, are promoted in whirl spraying, are marked when being promoted to design
Whirl spraying terminates when high；
5) drill bit drilling rod is rinsed, the remaining high polymer PFA in whole pipelines is cleaned；
6) positioning drilling machine is moved into next hole location, and repeats step (2)~(5), carry out the construction of next hole location.
6. method as claimed in claim 5, which is characterized in that the perpendicularity deviation of drilling rod is not more than 2%~3%.
7. method as claimed in claim 5, which is characterized in that high polymer PFA mixed liquor is delivered to drill bit through super-pressure pump and sprays
Perforation.
8. method as claimed in claim 5, which is characterized in that the high polymer PFA mixed liquor with the high pressure of 30~50MPa from
Whirl spraying hole ejects.
9. the device that a kind of high polymer PFA reinforces South Sea coral sand ground characterized by comprising super-pressure PFA pump, drilling machine,
Drilling rod, drill bit, which is characterized in that the super-pressure PFA pump is connected by conveyance conduit with drilling machine, the front end setting of the drilling machine
There is drilling rod, the front end of the drilling rod is provided with drill bit, is provided with whirl spraying hole and runner on the drill bit, and the conveyance conduit is from brill
It passes through inside bar, is connected with the whirl spraying hole on drill bit.
10. device as claimed in claim 9, which is characterized in that the super-pressure PFA pump is also connected with blender.
11. application of any one of the claim 1-3 high polymer PFA mixed liquor in grouting and reinforcing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910099269.2A CN109811760A (en) | 2019-01-31 | 2019-01-31 | A kind of method that high polymer PFA reinforces South Sea coral sand ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910099269.2A CN109811760A (en) | 2019-01-31 | 2019-01-31 | A kind of method that high polymer PFA reinforces South Sea coral sand ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109811760A true CN109811760A (en) | 2019-05-28 |
Family
ID=66606202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910099269.2A Pending CN109811760A (en) | 2019-01-31 | 2019-01-31 | A kind of method that high polymer PFA reinforces South Sea coral sand ground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109811760A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438974A (en) * | 2019-06-04 | 2019-11-12 | 南京大学 | A kind of method of microorganism solidified reagents box and in-situ solidifying calcareous sand |
| CN112681284A (en) * | 2021-01-22 | 2021-04-20 | 湘潭大学 | Coral sand foundation treatment method |
| CN115749590A (en) * | 2022-12-07 | 2023-03-07 | 中国电建集团华东勘测设计研究院有限公司 | Coral sand hole-spinning device and method with foundation solidification function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908318A (en) * | 2006-08-11 | 2007-02-07 | 上海煤气第二管线工程有限公司 | Foundation reinforcing method |
| CN103437340A (en) * | 2013-08-21 | 2013-12-11 | 国家电网公司 | Method for strengthening soft foundation through high-pressure jet grouting |
| CN104140667A (en) * | 2014-08-04 | 2014-11-12 | 成都理工大学 | Modified polyurethane grouting material and preparation method and application thereof |
| CN106638543A (en) * | 2016-12-16 | 2017-05-10 | 海南大学 | Coral sand solidification method |
| CN106638547A (en) * | 2016-10-17 | 2017-05-10 | 重庆大学 | Pile-forming method for cast-in-place pile in coral sand foundation |
-
2019
- 2019-01-31 CN CN201910099269.2A patent/CN109811760A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908318A (en) * | 2006-08-11 | 2007-02-07 | 上海煤气第二管线工程有限公司 | Foundation reinforcing method |
| CN103437340A (en) * | 2013-08-21 | 2013-12-11 | 国家电网公司 | Method for strengthening soft foundation through high-pressure jet grouting |
| CN104140667A (en) * | 2014-08-04 | 2014-11-12 | 成都理工大学 | Modified polyurethane grouting material and preparation method and application thereof |
| CN106638547A (en) * | 2016-10-17 | 2017-05-10 | 重庆大学 | Pile-forming method for cast-in-place pile in coral sand foundation |
| CN106638543A (en) * | 2016-12-16 | 2017-05-10 | 海南大学 | Coral sand solidification method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438974A (en) * | 2019-06-04 | 2019-11-12 | 南京大学 | A kind of method of microorganism solidified reagents box and in-situ solidifying calcareous sand |
| CN110438974B (en) * | 2019-06-04 | 2021-03-12 | 南京大学 | Microbial solidification kit and method for in-situ solidification of calcareous sand |
| CN112681284A (en) * | 2021-01-22 | 2021-04-20 | 湘潭大学 | Coral sand foundation treatment method |
| CN115749590A (en) * | 2022-12-07 | 2023-03-07 | 中国电建集团华东勘测设计研究院有限公司 | Coral sand hole-spinning device and method with foundation solidification function |
| CN115749590B (en) * | 2022-12-07 | 2023-08-29 | 中国电建集团华东勘测设计研究院有限公司 | Coral sand rotary hole device and method with foundation solidification function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109811760A (en) | A kind of method that high polymer PFA reinforces South Sea coral sand ground | |
| CN109578021B (en) | Grouting reinforcement method for soft rock tunnel | |
| CN104988910B (en) | Reducing rotating spraying mixture pile | |
| EP1984571B1 (en) | In-situ pilings with consistent properties from top to bottom and minimal voids | |
| CN106351665A (en) | Construction method using slag and soil improvement in soil pressure balance type rectangular shield top tunneling of sand gravel stratum | |
| CN106368214B (en) | A kind of casing formula cement mixing method at pile operation method | |
| CN103556631A (en) | Pile-forming operation method for stirring pile | |
| CN107059960A (en) | A kind of indoor full automatic simulates the experimental rig of cement mixing method | |
| CN108035344A (en) | A kind of permeable rigid pile of high polymer rubble and its construction technology | |
| CN104153357A (en) | Construction method of composite pile | |
| CN104480932B (en) | The soft base cement mixing pile construction method of saline alkali mud matter | |
| JP2019070318A (en) | Liquefaction countermeasure method for ground | |
| CN101649614A (en) | Variable-diameter multi-direction anchor pile | |
| Rajendiran | Effect of nano silica on the performance of cementitious grout for ground modification | |
| US20170058478A1 (en) | System, Method, and Apparatus for Permeation Grouting | |
| AU2005269461B2 (en) | Process to prepare in-situ pilings in clay soil | |
| CN109024557A (en) | A kind of drill-pouring prefabricated pile and construction method | |
| CN107245996A (en) | Soft soil roadbed cement mixing pile constructing process | |
| EP1676009B1 (en) | Apparatus and method to prepare in-situ pilings with pre-selected physical properties | |
| CN106082842A (en) | A kind of unique construction agent for deep-layer stirring construction and special clay hardening liquid | |
| CN208949875U (en) | High-pressure rotary-spray is the same as Jing Xuanjiao mechanism and compound strength stake all-in-one machine | |
| CN102748036B (en) | Slurry proportioning and construction method for reinforcing dry powder fine sand layer tunnel | |
| JP2918323B2 (en) | Ground improvement method | |
| JP2002054132A (en) | Soil improving method and soil improving apparatus | |
| CN105672245B (en) | Flow the method that the high strength cement soil body is formed in plasticity weak soil |
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: 20190528 |