CN110344403A - The construction method of major diameter deep-layer stirring is realized based on drop resistance mode - Google Patents
The construction method of major diameter deep-layer stirring is realized based on drop resistance mode Download PDFInfo
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- 238000003756 stirring Methods 0.000 title claims abstract description 164
- 238000010276 construction Methods 0.000 title claims abstract description 80
- 239000000463 material Substances 0.000 claims abstract description 61
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 44
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 44
- 239000004568 cement Substances 0.000 claims abstract description 43
- 239000002563 ionic surfactant Substances 0.000 claims abstract description 34
- 206010001497 Agitation Diseases 0.000 claims abstract description 31
- 238000013019 agitation Methods 0.000 claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- 239000000243 solution Substances 0.000 claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 22
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 9
- 230000009466 transformation Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 44
- 238000005553 drilling Methods 0.000 claims description 43
- 239000011440 grout Substances 0.000 claims description 33
- 239000007921 spray Substances 0.000 claims description 13
- 238000010348 incorporation Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000011398 Portland cement Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 150000002500 ions Chemical class 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 208000009146 rhinoscleroma Diseases 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The construction method of major diameter deep-layer stirring is realized based on drop resistance mode, belong to piling Technology field, by organically combining resistance-lowering material and agitation driller, the construction method of major diameter deep layer is realized using following steps: construction site prepares, construction equipment configuration and transformation；Resistance-lowering material and curing materials configure；Stirring is lower to bore construction；Stirring proposes brill construction；Construction is bored under secondary agitation；Secondary agitation proposes brill construction；When stirring drill bit is promoted to design height, stirring operation is completed, construction terminates.Present invention improves over the structure types of conventional drill, to reach the function of reducing resistance；The resistance of stirring blade is reduced by injection ionic surfactant solution；By mixing carbon nanotube in cement slurry, new curing material is formed, is conducive to being sufficiently mixed for slurries and the soil body；Different construction parameters is used under different geological conditions, is targetedly constructed, construction efficiency is improved, and guarantees stirring quality of pile.
Description
Technical field
The present invention relates to piling Technology fields, and in particular to realizes major diameter deep-layer stirring to based on drop resistance mode
Construction method.
Background technique
Deep mixing technique is formally applied to engineering practice from nineteen seventies, has been widely used in work at present
In the construction of industry and civil buildings, subway, highway, municipal administration, water conservancy, harbor approach and Offshore Units etc..Cement soil deep stirring
Stake is a kind of method for reinforcing soft ground, it passes through special Mixing Machine and defeated slurry using cement as curing agent
Weak soil and curing agent action of forced stirring are mixed in ground depths, utilize a series of objects generated between curing agent and weak soil by pump
Physicochemical reaction makes weak soil scleroma at globality, water stability and the composite foundation of base bearing capacity higher.
With the extensive use of deep mixing technique, the projected depth of mixing pile is deeper and deeper, when drilling machine being caused to creep on
It is larger to cover load, while resistance suffered by lower blade is larger, to reduce engineering construction efficiency.The mouth spray of convention stir drill bit
It is arranged on drilling rod, in deep-layer stirring since pressure is larger, slurries are extremely difficult to mixing pile edge, cause pile quality poor.
Although the bottom fashion using notch setting in stirring blade improves, when agitating shaft, which is promoted, to turn round, blade bottom is stirred upper
Portion will generate certain gap, then improved materials are sprayed onto the gap with the agitated axis of compressed air from upper stirring blade root
It goes.This notch setting mode solves the problems, such as this to a certain extent.But since the gap range of blade bottom is smaller and native
Very fast to the filling speed in gap, the effect for causing it to play is limited.
Therefore, resistance is excessive becomes the outstanding problem for restricting the development of major diameter deep-mixed pile, how to reduce deep layer and stirs
Resistance suffered by drill bit, becomes urgent problem to be solved when mixing.It is big straight the invention proposes being realized based on drop resistance mode based on this
The construction method of diameter deep-layer stirring.
Summary of the invention
For the above-mentioned technical problems in the prior art, the invention proposes realize large-diameter deep based on drop resistance mode
The construction method of layer stirring, overcomes the deficiencies in the prior art.By improving the structure type of conventional drill, Novel drill is produced
Head, to reach the function of reducing resistance；The resistance of stirring blade is reduced by injection ionic surfactant solution；By
Carbon nanotube is mixed in cement slurry, forms new curing material, is conducive to being sufficiently mixed for slurries and the soil body；In different geology items
Different construction parameters is used under part, is targetedly constructed, construction efficiency is improved, and guarantees stirring quality of pile.
To achieve the goals above, the present invention adopts the following technical scheme:
The construction method of major diameter deep-layer stirring is realized based on drop resistance mode, which is characterized in that by by resistance-lowering material and stirring
Drilling machine organically combines, and the construction method of major diameter deep layer is realized using following steps:
Step 1: construction site prepares, construction equipment configuration and transformation；
According to stirring design scheme, the stirring drill bit that setting matches with stirring diameter, stirring drill bit stirs leaf by stirring drilling rod, master
Piece and stir blade again and form, it is main stir blade and stir blade radius again stir diameter and being consistent with designing；Blade back is stirred in master
It is uniformly arranged 1-10 curing materials jet port, curing materials jet port direction and main blade back exterior normal direction of stirring keep one
It causes；Master stirs blade radius and is uniformly arranged 1-10 resistance-lowering material jet port, resistance-lowering material injection in the main bucket front lower edge that stirs
Mouthful direction and the main blade lower edge that stirs are vertical and stir blade surface along leading and tilt upward；By configured stirring drill bit with connect bore
Bar is connected through a screw thread, and stirring drill bit and jointed rod entirety are then passed through flanged joint with agitation driller；
Step 2: resistance-lowering material and curing materials configure；
Resistance-lowering material selects ionic surfactant solution, and curing materials select the cement grout mixed with carbon nanotube；Wherein,
The incorporation quality of ionic surfactant is to stir the 0%-10% of soil body quality, ionic surfactant solution concentration range
For 0%-8%；Length of carbon nanotube range is 2-20 microns, and outer diameter range is 2-20 microns, and carbon nanotube is in cement grout
In quality accounting be 0%-1%, the ratio of mud of cement grout is 1-2；
Step 3: stirring is lower to bore construction；
Ionic surfactant solution is sprayed by resistance-lowering material jet port continuity in stirring going down process, sprays pressure
For 0.5-20MPa；
Step 4: stirring proposes brill construction；
The cement grout mixed with carbon nanotube, jet pressure are sprayed in stirring drilling process by curing materials jet port continuity
Power is 0.5-20MPa, and the amount of injection of slurries is the 60%-80% of total slurries the amount of injection in drilling process；
Step 5: construction is bored under secondary agitation；
Only carry out stirring operation in secondary agitation going down process, does not spray any material；
Step 6: secondary agitation proposes brill construction；
The cement grout mixed with carbon nanotube, spray are sprayed by curing materials jet port continuity in secondary agitation drilling process
Injection pressure is 0.5-20MPa, and the amount of injection of slurries is the 20%-40% of total slurries the amount of injection in secondary drilling process；
Step 7: when stirring drill bit is promoted to design height, completing stirring operation, construction terminates.
Test index mark, which is passed through, according to the mark of the construction site soil body passes through that whitewashing liquid is stirred in the dynamic adjustment of radix N value and whirl spraying slurries are matched
Scheme is set, concrete configuration scheme is as follows:
Mark pass through test index mark pass through radix N value range be 0-30 when, selection concentration be 0%-1% ionic surfactant solution,
The incorporation quality of ionic surfactant is to stir the 0%-2% of soil body quality, and quality of the carbon nanotube in cement grout accounts for
Than for 0%-0.2%；
Mark pass through test index mark pass through radix N value range be 30-50 when, selection concentration be 1%-2% ionic surfactant solution,
The incorporation quality of ionic surfactant is to stir the 2%-4% of soil body quality, and quality of the carbon nanotube in cement grout accounts for
Than for 0%-0.4%；
Mark pass through test index mark pass through radix N value range be 50-80 when, selection concentration be 2%-4% ionic surfactant solution,
The incorporation quality of ionic surfactant is to stir the 4%-6% of soil body quality, and quality of the carbon nanotube in cement grout accounts for
Than for 0%-0.6%；
When mark passes through test index mark and passes through radix N value greater than 80, selections concentration is 4%-8% ionic surfactant solution, ion
The incorporation quality of type surfactant is to stir the 6%-10% of soil body quality, and quality accounting of the carbon nanotube in cement grout is
0%-1%.
Preferably, it is 50-1500mm/min, revolving speed 5-20r/ that drilling rod, which moves down speed, in the stirring going down process
min；It is 100-3000mm/min, revolving speed 10-30r/min, secondary agitation that drilling rod, which moves up speed, in stirring lifting process
It is lower to bore that construction drilling rod moves down speed and revolving speed be stirring 1.2-5 times of going down process, secondary agitation lifting construction drilling rod to
Upper movement speed and revolving speed are 1.2-5 times for stirring lifting process.
Preferably, the specific surface area of the carbon nanotube is greater than 200m2/g。
Preferably, the cement selection P.O42.5 ordinary portland cement in the cement grout, carbon nanotube first with
After P.O42.5 ordinary portland cement is sufficiently mixed, adds pure water and carry out that the water to be formed mixed with carbon nanotube is sufficiently stirred
Slurry liquid.
Advantageous effects brought by the present invention:
(1) by improving the structure type of conventional drill, new drill is produced, to reach the function of reducing resistance；(2) pass through
Ionic surfactant solution is sprayed, the resistance of stirring blade is reduced；(3) by mixing carbon nanotube, shape in cement slurry
At new curing material, be conducive to being sufficiently mixed for slurries and the soil body；(4) joined under different geological conditions using different constructions
Number is targetedly constructed, and construction efficiency is improved, and is guaranteed stirring quality of pile, is achieved the purpose that adaptation to local conditions.
Detailed description of the invention
Fig. 1 is the process flow chart that the construction method of major diameter deep-layer stirring is realized the present invention is based on drop resistance mode.
Specific embodiment
With reference to the accompanying drawing and specific embodiment invention is further described in detail:
Embodiment 1:
Using construction method of the invention, when it is 20 that the mark of Geological condition, which passes through test index mark to pass through radix N value, according to such as
Lower step carries out:
The construction method of major diameter deep-layer stirring is realized based on drop resistance mode, which is characterized in that by by resistance-lowering material and stirring
Drilling machine organically combines, and the construction method of major diameter deep layer is realized using following steps:
Step 1: construction site prepares, construction equipment configuration and transformation；
According to stirring design scheme, the stirring drill bit that setting matches with stirring diameter, stirring drill bit stirs leaf by stirring drilling rod, master
Piece and stir blade again and form, it is main stir blade and stir blade radius again stir diameter and being consistent with designing；Blade back is stirred in master
5 curing materials jet ports are uniformly arranged, curing materials jet port direction is stirred blade back exterior normal direction with master and is consistent；
Main blade radius of stirring stirs bucket front lower edge and is uniformly arranged 5 resistance-lowering material jet ports, resistance-lowering material jet port direction main
It is vertical and stir blade surface along leading and tilt upward with the main blade lower edge that stirs；Configured stirring drill bit is passed through with jointed rod
It is threadedly coupled, stirring drill bit and jointed rod entirety is then passed through into flanged joint with agitation driller；
Step 2: resistance-lowering material and curing materials configure；
Resistance-lowering material selects ionic surfactant solution, and curing materials select the cement grout mixed with carbon nanotube；Wherein,
The incorporation quality of ionic surfactant is stir soil body quality 2%, and ionic surfactant solution concentration is 1%；Carbon
Nanotube length range is 10 microns, and outer diameter range is 5 microns, and quality accounting of the carbon nanotube in cement grout is
0.2%, the ratio of mud of cement grout is 1.2；
Step 3: stirring is lower to bore construction；
Ionic surfactant solution is sprayed by resistance-lowering material jet port continuity in stirring going down process, sprays pressure
For 10MPa；
Step 4: stirring proposes brill construction；
The cement grout mixed with carbon nanotube, jet pressure are sprayed in stirring drilling process by curing materials jet port continuity
Power is 5MPa, and the amount of injection of slurries is the 70% of total slurries the amount of injection in drilling process；
Step 5: construction is bored under secondary agitation；
Only carry out stirring operation in secondary agitation going down process, does not spray any material；
Step 6: secondary agitation proposes brill construction；
The cement grout mixed with carbon nanotube, spray are sprayed by curing materials jet port continuity in secondary agitation drilling process
Injection pressure is 10MPa, and the amount of injection of slurries is the 30% of total slurries the amount of injection in secondary drilling process；
Step 7: when stirring drill bit is promoted to design height, completing stirring operation, construction terminates.
Preferably, it is 600mm/min, revolving speed 10r/min that drilling rod, which moves down speed, in the stirring going down process；It stirs
Mixing drilling rod in lifting process and moving up speed is 1000mm/min, revolving speed 20r/min, bore under secondary agitation construction drilling rod to
Lower movement speed and revolving speed are 2 times for stirring going down process, and secondary agitation lifting construction drilling rod moves up speed and revolving speed is
2 times for stirring lifting process.
Preferably, the specific surface area of the carbon nanotube is greater than 200m2/g。
Preferably, the cement selection P.O42.5 ordinary portland cement in the cement grout, carbon nanotube first with
After P.O42.5 ordinary portland cement is sufficiently mixed, adds pure water and carry out that the water to be formed mixed with carbon nanotube is sufficiently stirred
Slurry liquid.
Embodiment 2:
Using construction method of the invention, when it is 60 that the mark of Geological condition, which passes through test index mark to pass through radix N value, according to such as
Lower step carries out:
The construction method of major diameter deep-layer stirring is realized based on drop resistance mode, which is characterized in that by by resistance-lowering material and stirring
Drilling machine organically combines, and the construction method of major diameter deep layer is realized using following steps:
The construction method of major diameter deep-layer stirring is realized based on drop resistance mode, which is characterized in that by by resistance-lowering material and stirring
Drilling machine organically combines, and the construction method of major diameter deep layer is realized using following steps:
Step 1: construction site prepares, construction equipment configuration and transformation；
According to stirring design scheme, the stirring drill bit that setting matches with stirring diameter, stirring drill bit stirs leaf by stirring drilling rod, master
Piece and stir blade again and form, it is main stir blade and stir blade radius again stir diameter and being consistent with designing；Blade back is stirred in master
5 curing materials jet ports are uniformly arranged, curing materials jet port direction is stirred blade back exterior normal direction with master and is consistent；
Main blade radius of stirring stirs bucket front lower edge and is uniformly arranged 5 resistance-lowering material jet ports, resistance-lowering material jet port direction main
It is vertical and stir blade surface along leading and tilt upward with the main blade lower edge that stirs；Configured stirring drill bit is passed through with jointed rod
It is threadedly coupled, stirring drill bit and jointed rod entirety is then passed through into flanged joint with agitation driller；
Step 2: resistance-lowering material and curing materials configure；
Resistance-lowering material selects ionic surfactant solution, and curing materials select the cement grout mixed with carbon nanotube；Wherein,
The incorporation quality of ionic surfactant is stir soil body quality 5%, and ionic surfactant solution concentration range is
3%；Length of carbon nanotube range is 10 microns, and outer diameter range is 7 microns, and quality of the carbon nanotube in cement grout accounts for
Than being 0.5%, the ratio of mud of cement grout is 1.5；
Step 3: stirring is lower to bore construction；
Ionic surfactant solution is sprayed by resistance-lowering material jet port continuity in stirring going down process, sprays pressure
For 10MPa；
Step 4: stirring proposes brill construction；
The cement grout mixed with carbon nanotube, jet pressure are sprayed in stirring drilling process by curing materials jet port continuity
Power is 20MPa, and the amount of injection of slurries is the 70% of total slurries the amount of injection in drilling process；
Step 5: construction is bored under secondary agitation；
Only carry out stirring operation in secondary agitation going down process, does not spray any material；
Step 6: secondary agitation proposes brill construction；
The cement grout mixed with carbon nanotube, spray are sprayed by curing materials jet port continuity in secondary agitation drilling process
Injection pressure is 15MPa, and the amount of injection of slurries is the 30% of total slurries the amount of injection in secondary drilling process；
Step 7: when stirring drill bit is promoted to design height, completing stirring operation, construction terminates.
Preferably, it is 900mm/min, revolving speed 20r/min that drilling rod, which moves down speed, in the stirring going down process；It stirs
Mixing drilling rod in lifting process and moving up speed is 2000mm/min, revolving speed 30r/min, bore under secondary agitation construction drilling rod to
Lower movement speed and revolving speed are 1. 5 times for stirring going down process, and secondary agitation lifting construction drilling rod moves up speed and revolving speed
For 1.5 times for stirring lifting process.
Preferably, the specific surface area of the carbon nanotube is greater than 200m2/g。
Preferably, the cement selection P.O42.5 ordinary portland cement in the cement grout, carbon nanotube first with
After P.O42.5 ordinary portland cement is sufficiently mixed, adds pure water and carry out that the water to be formed mixed with carbon nanotube is sufficiently stirred
Slurry liquid.
The present invention is based on the construction methods that drop resistance mode realizes major diameter deep-layer stirring, by the structure for improving conventional drill
Form produces new drill, to reach the function of reducing resistance；Stirring is reduced by injection ionic surfactant solution
The resistance of blade；By mixing carbon nanotube in cement slurry, new curing material is formed, is conducive to the abundant of slurries and the soil body
Mixing；Different construction parameters is used under different geological conditions, is targetedly constructed, construction efficiency is improved, and guarantees stirring
Quality of pile.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also belong to guarantor of the invention
Protect range.
Claims (5)
1. realizing the construction method of major diameter deep-layer stirring based on drop resistance mode, which is characterized in that by by resistance-lowering material with stir
Drilling machine combination is mixed, the construction method of major diameter deep layer is realized using following steps:
Step 1: construction site prepares, construction equipment configuration and transformation；
According to stirring design scheme, the stirring drill bit that setting matches with stirring diameter, stirring drill bit stirs leaf by stirring drilling rod, master
Piece and stir blade again and form, it is main stir blade and stir blade radius again stir diameter and being consistent with designing；Blade back is stirred in master
It is uniformly arranged 1-10 curing materials jet port, curing materials jet port direction and main blade back exterior normal direction of stirring keep one
It causes；Master stirs blade radius and is uniformly arranged 1-10 resistance-lowering material jet port, resistance-lowering material injection in the main bucket front lower edge that stirs
Mouthful direction and the main blade lower edge that stirs are vertical and stir blade surface along leading and tilt upward；By configured stirring drill bit with connect bore
Bar is connected through a screw thread, and stirring drill bit and jointed rod entirety are then passed through flanged joint with agitation driller；
Step 2: resistance-lowering material and curing materials configure；
Resistance-lowering material selects ionic surfactant solution, and curing materials select the cement grout mixed with carbon nanotube；Wherein,
The incorporation quality of ionic surfactant is to stir the 0%-10% of soil body quality, ionic surfactant solution concentration range
For 0%-8%；Length of carbon nanotube range is 2-20 microns, and outer diameter range is 2-20 microns, and carbon nanotube is in cement grout
In quality accounting be 0%-1%, the ratio of mud of cement grout is 1-2；
Step 3: stirring is lower to bore construction；
Ionic surfactant solution is sprayed by resistance-lowering material jet port continuity in stirring going down process, sprays pressure
For 0.5-20MPa；
Step 4: stirring proposes brill construction；
The cement grout mixed with carbon nanotube, jet pressure are sprayed in stirring drilling process by curing materials jet port continuity
Power is 0.5-20MPa, and the amount of injection of slurries is the 60%-80% of total slurries the amount of injection in drilling process；
Step 5: construction is bored under secondary agitation；
Only carry out stirring operation in secondary agitation going down process, does not spray any material；
Step 6: secondary agitation proposes brill construction；
The cement grout mixed with carbon nanotube, spray are sprayed by curing materials jet port continuity in secondary agitation drilling process
Injection pressure is 0.5-20MPa, and the amount of injection of slurries is the 20%-40% of total slurries the amount of injection in secondary drilling process；
Step 7: when stirring drill bit is promoted to design height, completing stirring operation, construction terminates.
2. the construction method according to claim 1 for realizing major diameter deep-layer stirring based on drop resistance mode, which is characterized in that
Test index mark passed through according to the mark of the construction site soil body pass through the dynamic adjustment of radix N value stir whitewashing liquid and whirl spraying slurry configurations scheme,
Concrete configuration scheme is as follows:
Mark pass through test index mark pass through radix N value range be 0-30 when, selection concentration be 0%-1% ionic surfactant solution,
The incorporation quality of ionic surfactant is to stir the 0%-2% of soil body quality, and quality of the carbon nanotube in cement grout accounts for
Than for 0%-0.2%；
Mark pass through test index mark pass through radix N value range be 30-50 when, selection concentration be 1%-2% ionic surfactant solution,
The incorporation quality of ionic surfactant is to stir the 2%-4% of soil body quality, and quality of the carbon nanotube in cement grout accounts for
Than for 0%-0.4%；
Mark pass through test index mark pass through radix N value range be 50-80 when, selection concentration be 2%-4% ionic surfactant solution,
The incorporation quality of ionic surfactant is to stir the 4%-6% of soil body quality, and quality of the carbon nanotube in cement grout accounts for
Than for 0%-0.6%；
When mark passes through test index mark and passes through radix N value greater than 80, selections concentration is 4%-8% ionic surfactant solution, ion
The incorporation quality of type surfactant is to stir the 6%-10% of soil body quality, and quality accounting of the carbon nanotube in cement grout is
0%-1%.
3. the construction method according to claim 1 for realizing major diameter deep-layer stirring based on drop resistance mode, which is characterized in that
It is 50-1500mm/min, revolving speed 5-20r/min that drilling rod, which moves down speed, in the stirring going down process；Stirring was promoted
It is 100-3000mm/min, revolving speed 10-30r/min that drilling rod, which moves up speed, in journey, bore under secondary agitation construction drilling rod to
Lower movement speed and revolving speed are 1.2-5 times for stirring going down process, and secondary agitation lifting construction drilling rod moves up speed and turns
Speed is 1.2-5 times of stirring lifting process.
4. the construction method according to claim 1 for realizing major diameter deep-layer stirring based on drop resistance mode, which is characterized in that
The specific surface area of the carbon nanotube is greater than 200m2/g。
5. the construction method according to claim 1 for realizing major diameter deep-layer stirring based on drop resistance mode, which is characterized in that
Cement selection P.O42.5 ordinary portland cement in the cement grout, carbon nanotube elder generation and P.O42.5 normal silicate water
After mud is sufficiently mixed, adds pure water and carry out that the cement grout to be formed mixed with carbon nanotube is sufficiently stirred.
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| CN201910681509.XA CN110344403A (en) | 2019-07-26 | 2019-07-26 | The construction method of major diameter deep-layer stirring is realized based on drop resistance mode |
| PCT/CN2020/101637 WO2021017798A1 (en) | 2019-07-26 | 2020-07-13 | Construction method for achieving large-diameter deep mixing on basis of resistance reduction |
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| CN201910681509.XA CN110344403A (en) | 2019-07-26 | 2019-07-26 | The construction method of major diameter deep-layer stirring is realized based on drop resistance mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021017798A1 (en) * | 2019-07-26 | 2021-02-04 | 北京中岩大地科技股份有限公司 | Construction method for achieving large-diameter deep mixing on basis of resistance reduction |
| CN112796311A (en) * | 2020-08-24 | 2021-05-14 | 北京中岩大地科技股份有限公司 | Construction method for high-speed deep stirring |
Citations (5)
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