CN108086298A - A kind of microorganism Grouting Pipe prefabricated pile and its construction method for reinforcing calcareous sand ground - Google Patents
A kind of microorganism Grouting Pipe prefabricated pile and its construction method for reinforcing calcareous sand ground Download PDFInfo
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- CN108086298A CN108086298A CN201711304022.7A CN201711304022A CN108086298A CN 108086298 A CN108086298 A CN 108086298A CN 201711304022 A CN201711304022 A CN 201711304022A CN 108086298 A CN108086298 A CN 108086298A
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- prefabricated pile
- grouting pipe
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
- E02D5/24—Prefabricated piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Invention provides a kind of microorganism Grouting Pipe prefabricated pile and construction method for reinforcing calcareous sand ground.The prefabricated pile includes the prefabricated pile in implantation calcareous sand ground.The prefabricated pile stake in-core setting is disposed with several Grouting Pipes.The Grouting Pipe runs through the stake top of prefabricated pile and pile top side.The upper end of the Grouting Pipe is injected hole, and lower end is discharge hole.The discharge hole of the Grouting Pipe is blocked using stopple.The construction method of the prefabricated pile includes making prefabricated pile, piling construction, mortar depositing construction and effect detection.The prefabricated pile in itself will not pollute ocean using bacterium hydrolysis urea generation calcarinate sand particle, principle easy to operate is simple, pile body integrally bears upper load with reinforcing body after grouting and reinforcing, help to prevent pile foundation from generating excessive sedimentation, promote application of the prefabricated pile on calcareous sand ground.
Description
Technical field
The present invention relates to Geotechnical Engineering field, more particularly to a kind of prefabricated pile.
Background technology
Malm is often referred under marine environment, and the biogenic carbonate ground rich in calcium carbonate or indissoluble is situated between
Matter.Global tropical and Subtropical Coastal region and deep-sea islands and reefs between 30 ° of 30 °~south latitude of north latitude are dispersed with a large amount of deep
Malm.This region is often the economic important place that population Relatively centralized, fossil bioenergy enrich again.
Calcareous sand has the characteristics that porous, frangible, good cementing.It is broken since calcareous sand particle easily generates under mechanical function
Broken, the more common quartz sand of engineering characteristic is very different.Although the high capacity of malm ground, granular cementation
It is expendable permanent plastic deformation caused by broken ring.Major diameter is once run into the offshore platform pile foundation construction of the Persian Gulf
Pile pile into calcareous layer of sand 15m is settled under Gravitative Loads the phenomenon that.The research harvested etc. according to Wang, the pile foundation work in malm
Journey is low there are end resistance, and angle of friction reduces notable non-linear under high confining pressure, and bearing capacity of pile foundation is caused to be difficult to definite engineering
Characteristic.Conventional pile foundation is not suitable for calcareous sand ground.
The content of the invention
The object of the present invention is to provide it is a kind of reinforce calcareous sand ground microorganism Grouting Pipe prefabricated pile and its construction method,
To solve problems of the prior art.
To realize the present invention purpose and the technical solution adopted is that such, a kind of microorganism note for reinforcing calcareous sand ground
The construction method of pipe prefabricated pile is starched, is comprised the following steps：
1) prefabricated pile is made in factory.Wherein, the prefabricated pile stake in-core setting is disposed with several Grouting Pipes.The note
Slurry pipe is through the stake top of prefabricated pile and pile top side.The upper end of the Grouting Pipe is injected hole, and lower end is discharge hole.The slip casting
The discharge hole of pipe is blocked using stopple.
2) prefabricated pile is installed into calcareous sand ground by the way of static pressure or hammering by design requirement.
3) reaction solution is pumped into Grouting Pipe using grouting equipment.The reaction solution penetrates into the calcium around prefabricated pile pile top
In matter sand.
4) bacterial suspension is perfused into Grouting Pipe.The bacterial suspension penetrates into the calcareous sand around prefabricated pile pile top
In soil.Bacterium hydrolysis urea generation calcium carbonate, calcarinate pile top crush layer of sand and form grouting and reinforcing body.
5) step 3) and step 4) are repeated, until bearing capacity of pile foundation and deformation performance meet design requirement.
6) using concrete compacting filling Grouting Pipe to stake top.
Further, reaction solution described in step 3) is urea liquid or urea and calcium chloride mixed liquor.
Further, when calcium ions and magnesium ions total amount is more than 0.5mol/L in underground water, reaction solution is molten using the urea of 1mol/L
Liquid.Otherwise, reaction solution uses the urea of 1mol/L and calcium chloride mixed liquor.Wherein, the urea is used with calcium chloride mixed liquor
Seawater configures, and the concentration ratio of calcium chloride solution and urea liquid is 1:1.
Further, bacterial suspension described in step 4) is Bacillus pasteurii microorganism suspension.Bacterial concentration >=
109CFU。
Further, also there is the correlation step for implementing engineering geological investigation and water analysis before step 2).
Further, in step 5), also have and crush layer of sand degree of consolidation using low strain vibration test technology detection pile top
Correlation step.
Further, the grouting pressure of reaction solution described in step 3) be 0.1~2MPa, flow rate of grouting≤0.4L/min.Step
It is rapid 4) described in bacterial suspension flow rate of grouting≤0.1L/min.
Invention additionally discloses a kind of pre- using the microorganism Grouting Pipe that calcareous sand ground is reinforced made from above-mentioned construction method
Stake processed, including the prefabricated pile in implantation calcareous sand ground.
The prefabricated pile stake in-core setting is disposed with several Grouting Pipes.Stake top and stake of the Grouting Pipe through prefabricated pile
Sharp side.The upper end of the Grouting Pipe is injected hole, and lower end is discharge hole.The discharge hole of the Grouting Pipe is blocked using stopple.
During work, reaction solution and bacterial suspension are perfused into Grouting Pipe from injected hole using grouting equipment.The reaction
Liquid and bacterial suspension are penetrated into the malm around prefabricated pile pile top, bacterium hydrolysis liquid generation calcium carbonate, carbonic acid
The cementing pile top of calcium crushes layer of sand and forms grouting and reinforcing body.The grouting and reinforcing body with prefabricated pile is cementing is solidified as an entirety.Note
After the completion of slurry, the Grouting Pipe uses Concrete Filled.
Further, the section form of the prefabricated pile is using square, circular or special-shaped.
Further, the Grouting Pipe is PVC steel wire tubes.The Grouting Pipe is internal diameter 10mm.
The solution have the advantages that unquestionable：
A. ocean will not be polluted in itself using bacterium hydrolysis urea generation calcarinate sand particle；
B. i.e. can obtain prefabricated pile needed for the present invention will not increase manufacture cost to built-in slip casting pipe in conventional prefabricated pile, no
The intensity of stake can be lost；
C. principle easy to operate is simple, and pile body integrally bears upper load with reinforcing body after grouting and reinforcing, helps to prevent
Pile foundation generates excessive sedimentation, promotes application of the prefabricated pile on calcareous sand ground.
Description of the drawings
Fig. 1 is microorganism Grouting Pipe prefabricated pile structure diagram in embodiment 2；
Fig. 2 is single-pipe grouting pipe precast square pile cross-sectional view；
Fig. 3 is single-pipe grouting pipe precast square pile pile body schematic cross-section；
Fig. 4 is the pre- rounding stake cross-sectional view of three pipe Grouting Pipes；
Fig. 5 is the pre- rounding stake body schematic cross-section of three pipe Grouting Pipes；
Fig. 6 is partial enlarged view at A；
Fig. 7 is construction method schematic diagram.
In figure：Grouting Pipe 1, prefabricated pile 2, grouting and reinforcing body 3, stopple 4, calcareous sand ground 5.
Specific embodiment
With reference to embodiment, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention only
It is limited to following embodiments.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and used
With means, various replacements and change are made, should all be included within the scope of the present invention.
Embodiment 1：
The present embodiment discloses a kind of construction method for the microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground, referring to Fig. 7,
Comprise the following steps：
1) prefabricated pile 2 is made in factory.Wherein, described 2 in-core settings of prefabricated pile are disposed with Grouting Pipe 1.The slip casting
Pipe 1 runs through the stake top of prefabricated pile 2 and pile top side.The upper end of the Grouting Pipe 1 is injected hole, and lower end is discharge hole.The note
The discharge hole of slurry pipe 1 is blocked using stopple 4.
2) implement engineering geological investigation and water analysis, determine the content of calcium ions and magnesium ions in level of ground water and underground water.
3) piling construction；By the way of static pressure or hammering prefabricated pile 2 is installed in designated position by design requirement to calcium
In matter sandy ground base 5.Step 1) the stopple 4 can prevent that sand particle blocks Grouting Pipe in pile driving process.Pile driving process should meet phase
Close specification and technical standard, when pile sinking should strictly control the fall rate of stake is per minute to must not exceed 0.75m.Pile crown is small from the ground
Pile sinking terminates when 500mm.At this point, cementing broken ring, Particle Breakage occur for pile top sand, bearing capacity drastically declines.
4) grouting equipment is installed, into Grouting Pipe 1 reaction solution is pumped from injected hole using grouting equipment.Wherein, step is worked as
2) when determining that calcium ions and magnesium ions total amount is more than 0.5mol/L in underground water, reaction solution uses the urea liquid of 1mol/L.Otherwise, react
Liquid uses the urea of 1mol/L and calcium chloride mixed liquor.The urea is configured with calcium chloride mixed liquor using seawater, and calcium chloride is molten
The concentration ratio of liquid and urea liquid is 1:1.Stake slightly to be extracted during slip casting, the grouting pressure of the reaction solution is 0.1~2MPa,
The reaction solution washes stopple 4 open, flow rate of grouting≤0.4L/min.Parked 30min after when persistently slip casting 1 is small, makes reaction solution exist
It is spread in the malm of pile top peripheral region.
5) bacterial suspension is perfused into Grouting Pipe 1.The bacterial suspension is Bacillus pasteurii microorganism suspension.
Bacterial concentration >=109CFU.Flow rate of grouting≤0.1L/min of the bacterial suspension.The bacterial suspension penetrates into prefabricated
In malm around 2 pile tops of stake.Bacterium hydrolysis urea generation calcium carbonate, calcarinate pile top crush layer of sand and form slip casting
Reinforcing body 3.
6) step 4) and step 5) are repeated, layer of sand degree of consolidation is crushed using low strain vibration test technology detection pile top,
Until bearing capacity of pile foundation and deformation performance meet design requirement.
7) using concrete compacting filling Grouting Pipe 1 to stake top.
What deserves to be explained is in the present embodiment, at bacterial suspension and reaction solution injection pile top after, the gold in seawater
It is indissoluble carbonate to belong to cation ic-converted, thus broken sand particle and prefabricated pile 2 is cementing, form good supporting body.Stake top
Load is undertaken by the supporting body after cementing, is effectively increased bearing capacity of single pile, is reduced issuable sedimentation.Grouting and reinforcing simultaneously
Body 3, which forms carbonate protective layer, makes stake from chlorion, sulfate ion corrosion in seawater, extends service life.
Embodiment 2：
The present embodiment discloses a kind of using the microorganism note that calcareous sand ground is reinforced made from construction method described in embodiment 1
Pipe prefabricated pile is starched, including the prefabricated pile 2 in implantation calcareous sand ground 5.
Referring to Fig. 1, Fig. 2 and Fig. 3, the section form of the prefabricated pile 2 is using square.Described 2 in-cores of prefabricated pile are erect
It is disposed with Grouting Pipe 1.The Grouting Pipe 1 is along 2 elongated arrangement of prefabricated pile, through whole prefabricated pile 2.The upper end of the Grouting Pipe 1
For injected hole, lower end is discharge hole.The discharge hole of the Grouting Pipe 1 is blocked using stopple 4.
During work, reaction solution and bacterial suspension are perfused into Grouting Pipe 1 from injected hole using grouting equipment.The reaction
Liquid and bacterial suspension are penetrated into the malm around 2 pile top of prefabricated pile, bacterium hydrolysis liquid generation calcium carbonate, carbonic acid
The cementing pile top of calcium crushes layer of sand and forms grouting and reinforcing body 3.The grouting and reinforcing body 3 is cementing solidifying by broken sand particle and prefabricated pile 2
Admittedly for an entirety.After the completion of slip casting, the Grouting Pipe 1 uses Concrete Filled.
Embodiment 3：
The present embodiment discloses a kind of using the microorganism note that calcareous sand ground is reinforced made from construction method described in embodiment 1
Pipe prefabricated pile is starched, including the prefabricated pile 2 in implantation calcareous sand ground 5.
Referring to Fig. 4 and Fig. 5, the section form of the prefabricated pile 2 is using circular.Described 2 in-cores of prefabricated pile erect arrangement
There are 3 Grouting Pipes 1.The Grouting Pipe 1 is PVC steel wire tubes.The Grouting Pipe 1 is internal diameter 10mm.Three PVC steel wire tubes surround
Center of circle disposed at equal distance.The Grouting Pipe 1 runs through the stake top of prefabricated pile 2 and pile top side.The upper end of the Grouting Pipe 1 is slip casting
Hole, lower end are discharge hole.Referring to Fig. 6, the discharge hole of the Grouting Pipe 1 is blocked using stopple 4, and stopple 4 is close to pile top plane.
During work, reaction solution and bacterial suspension are perfused into Grouting Pipe 1 from injected hole using grouting equipment.The reaction
Liquid and bacterial suspension are penetrated into the malm around 2 pile top of prefabricated pile, bacterium hydrolysis liquid generation calcium carbonate, carbonic acid
The cementing pile top of calcium crushes layer of sand and forms grouting and reinforcing body 3.The grouting and reinforcing body 3 with prefabricated pile 2 is cementing is solidified as an entirety.
After the completion of slip casting, the Grouting Pipe 1 uses Concrete Filled.
Claims (10)
1. a kind of construction method for the microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground, which is characterized in that including following step
Suddenly：
1) prefabricated pile (2) is made in factory；Wherein, prefabricated pile (2) the stake in-core setting is disposed with several Grouting Pipes (1)；
The Grouting Pipe (1) runs through the stake top of prefabricated pile (2) and pile top side；The upper end of the Grouting Pipe (1) is injected hole, and lower end is
Discharge hole；The discharge hole of the Grouting Pipe (1) is blocked using stopple (4)；
2) prefabricated pile (2) is installed into calcareous sand ground (5) by the way of static pressure or hammering by design requirement；
3) reaction solution is pumped into Grouting Pipe (1) using grouting equipment；The reaction solution is penetrated into around prefabricated pile (2) pile top
In malm；
4) the perfusion bacterial suspension into Grouting Pipe (1)；The bacterial suspension penetrates into calcareous around prefabricated pile (2) pile top
In sand；Bacterium hydrolysis urea generation calcium carbonate, calcarinate pile top crush layer of sand and form grouting and reinforcing body (3)；
5) step 3) and step 4) are repeated, until bearing capacity of pile foundation and deformation performance meet design requirement；
6) using concrete compacting filling Grouting Pipe (1) to stake top.
2. a kind of construction method of microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground according to claim 1,
It is characterized in that：Reaction solution described in step 3) is urea liquid or urea and calcium chloride mixed liquor.
3. a kind of construction method of microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground according to claim 1,
It is characterized in that：When calcium ions and magnesium ions total amount is more than 0.5mol/L in underground water, reaction solution uses the urea liquid of 1mol/L；It is no
Then, reaction solution uses the urea of 1mol/L and calcium chloride mixed liquor；Wherein, the urea is matched somebody with somebody with calcium chloride mixed liquor using seawater
It puts, the concentration ratio of calcium chloride solution and urea liquid is 1:1.
4. a kind of construction method of microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground according to claim 1,
It is characterized in that：Bacterial suspension described in step 4) is Bacillus pasteurii microorganism suspension；Bacterial concentration >=109CFU。
5. a kind of construction method of microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground according to claim 1,
It is characterized in that：Also there is the correlation step for implementing engineering geological investigation and water analysis before step 2).
6. a kind of construction method of microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground according to claim 1,
It is characterized in that：In step 5), also there is the correlation that layer of sand degree of consolidation is crushed using low strain vibration test technology detection pile top
Step.
7. a kind of construction method of microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground according to claim 1,
It is characterized in that：The grouting pressure of reaction solution described in step 3) be 0.1~2MPa, flow rate of grouting≤0.4L/min；In step 4)
Flow rate of grouting≤0.1L/min of the bacterial suspension.
8. a kind of usage right requires 1 construction method microorganism Grouting Pipe prefabricated pile obtained for reinforcing calcareous sand ground,
It is characterized in that：Including the prefabricated pile (2) in implantation calcareous sand ground (5)；
Prefabricated pile (2) the stake in-core setting is disposed with several Grouting Pipes (1)；The Grouting Pipe (1) is through prefabricated pile (2)
Stake top and pile top side；The upper end of the Grouting Pipe (1) is injected hole, and lower end is discharge hole；The discharge hole of the Grouting Pipe (1)
It is blocked using stopple (4)；
During work, reaction solution and bacterial suspension is perfused from injected hole to Grouting Pipe (1) is interior using grouting equipment；The reaction solution
And bacterial suspension is penetrated into the malm around prefabricated pile (2) pile top, bacterium hydrolysis liquid generation calcium carbonate, carbonic acid
The cementing pile top of calcium crushes layer of sand and forms grouting and reinforcing body (3)；The grouting and reinforcing body (3) with prefabricated pile (2) is cementing is solidified as one
A entirety；After the completion of slip casting, the Grouting Pipe (1) uses Concrete Filled.
9. a kind of microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground according to claim 5, it is characterised in that：Institute
The section form of prefabricated pile (2) is stated using square, circular or special-shaped.
10. a kind of microorganism Grouting Pipe prefabricated pile for reinforcing calcareous sand ground according to claim 5, it is characterised in that：
The Grouting Pipe (1) is PVC steel wire tubes；The Grouting Pipe (1) is internal diameter 10mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711304022.7A CN108086298A (en) | 2017-12-11 | 2017-12-11 | A kind of microorganism Grouting Pipe prefabricated pile and its construction method for reinforcing calcareous sand ground |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711304022.7A CN108086298A (en) | 2017-12-11 | 2017-12-11 | A kind of microorganism Grouting Pipe prefabricated pile and its construction method for reinforcing calcareous sand ground |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778784A (en) * | 2019-02-28 | 2019-05-21 | 重庆大学 | A kind of weak cementing device of off-lying sea calcareous sand hydraulic reclamation microorganism and its construction method |
| CN110130318A (en) * | 2019-05-24 | 2019-08-16 | 南京林业大学 | A kind of construction method of microorganism mixing-filling stake |
| CN110984128A (en) * | 2019-12-05 | 2020-04-10 | 中国建筑第八工程局有限公司 | Anti-blocking grouting device and construction method thereof |
| CN111648297A (en) * | 2020-05-12 | 2020-09-11 | 山东安澜工程建设有限公司 | River course in-situ solidification construction method |
| CN112195947A (en) * | 2020-09-09 | 2021-01-08 | 万金山 | Preparation process of self-plugging impervious curtain type concrete precast pile |
| CN112855072A (en) * | 2021-02-04 | 2021-05-28 | 河南理工大学 | Device and method for multistage plugging of surrounding rock fracture water by utilizing slurry and microbial mineralization |
| CN114135294A (en) * | 2021-08-24 | 2022-03-04 | 重庆大学 | Advanced grouting reinforcement method for red sandstone tunnel |
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| CN204753581U (en) * | 2015-06-09 | 2015-11-11 | 中亿丰建设集团股份有限公司 | Stake end enlarged footing precast pile |
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| CN206396742U (en) * | 2017-01-06 | 2017-08-11 | 福建金固建材有限公司 | A kind of prefabricated pile |
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| CN103603336A (en) * | 2013-10-31 | 2014-02-26 | 周兆弟 | Grouting precast pile and grouting method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778784A (en) * | 2019-02-28 | 2019-05-21 | 重庆大学 | A kind of weak cementing device of off-lying sea calcareous sand hydraulic reclamation microorganism and its construction method |
| CN110130318A (en) * | 2019-05-24 | 2019-08-16 | 南京林业大学 | A kind of construction method of microorganism mixing-filling stake |
| CN110984128A (en) * | 2019-12-05 | 2020-04-10 | 中国建筑第八工程局有限公司 | Anti-blocking grouting device and construction method thereof |
| CN111648297A (en) * | 2020-05-12 | 2020-09-11 | 山东安澜工程建设有限公司 | River course in-situ solidification construction method |
| CN112195947A (en) * | 2020-09-09 | 2021-01-08 | 万金山 | Preparation process of self-plugging impervious curtain type concrete precast pile |
| CN112855072A (en) * | 2021-02-04 | 2021-05-28 | 河南理工大学 | Device and method for multistage plugging of surrounding rock fracture water by utilizing slurry and microbial mineralization |
| CN112855072B (en) * | 2021-02-04 | 2022-10-28 | 河南理工大学 | Device and method for mineralizing and multistage blocking surrounding rock fracture water by using slurry and microorganisms |
| CN114135294A (en) * | 2021-08-24 | 2022-03-04 | 重庆大学 | Advanced grouting reinforcement method for red sandstone tunnel |
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Application publication date: 20180529 |