CN211368668U - Magnetized solution microorganism soil stabilization device - Google Patents
Magnetized solution microorganism soil stabilization device Download PDFInfo
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- CN211368668U CN211368668U CN201921228875.1U CN201921228875U CN211368668U CN 211368668 U CN211368668 U CN 211368668U CN 201921228875 U CN201921228875 U CN 201921228875U CN 211368668 U CN211368668 U CN 211368668U
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- microorganism
- liquid
- cementing
- magnetized
- slurry
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- 244000005700 microbiome Species 0.000 title claims abstract description 56
- 239000002689 soil Substances 0.000 title description 47
- 230000006641 stabilisation Effects 0.000 title description 4
- 238000011105 stabilization Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 96
- 241000894006 Bacteria Species 0.000 claims abstract description 39
- 239000002002 slurry Substances 0.000 claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 230000005415 magnetization Effects 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 230000001580 bacterial effect Effects 0.000 claims description 5
- 230000001976 improved effect Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 44
- 229910000019 calcium carbonate Inorganic materials 0.000 description 22
- 239000013078 crystal Substances 0.000 description 13
- 239000002245 particle Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000000813 microbial effect Effects 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 9
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000004202 carbamide Substances 0.000 description 5
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 4
- 229910001424 calcium ion Inorganic materials 0.000 description 4
- 159000000007 calcium salts Chemical class 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
A magnetized solution microorganism soil-fixing device comprises a cementing liquid container, a bacteria liquid container, a cementing liquid input pipe, a cementing liquid control valve, a bacteria liquid control valve, a magnetization processor, a magnetized microorganism slurry output pipe, a slurry pump, a drill rod, blades and a slurry spraying opening. The device can apply magnetic field action to the bacterium liquid and the cementing liquid to carry out magnetization treatment to prepare magnetized microorganism slurry, and the magnetized microorganism slurry is injected into a foundation to be reinforced and stirred, so that uniform and high-strength microorganism stirring piles can be prepared, the utilization rate of materials is improved, and the construction period is shortened.
Description
Technical Field
The invention relates to a device for improving the working performance of microorganism soil fixation by magnetizing microorganism soil fixation slurry, belonging to the technical field of foundation treatment.
Background
Compared with the traditional chemical soil fixation technology, the microbial soil fixation technology is a more environment-friendly soil fixation method. The microbial liquid and the cementing liquid are mixed, stirred and conveyed to a loose soil body, and after calcium carbonate is induced by microbes to precipitate and crystallize cemented soil particles, massive, wall-shaped or single-pile reinforced bodies are formed in the foundation, so that the bearing capacity of the foundation can be effectively improved, and the foundation settlement can be reduced. In the process of solidifying the soil body by the microorganisms, the activity of the microorganisms and the nucleation points of crystal nuclei are important factors influencing the process of inducing calcium carbonate crystallization by the microorganisms, the cementation rate and the cementation strength of the solidified soil body are directly influenced, and the realization of the controllability of the microbial reaction process is a key link for applying the microbial soil solidification technology.
Technical scheme of prior art I
Microorganism slip casting consolidates the ground, insert the slip casting pipe on the ground to be consolidated, inject bacterium liquid and calcium salt, urea-containing cementing liquid into the soil mass through the slip casting pipe together or successively, utilize microorganism to induce the calcium carbonate precipitation reaction, make the microorganism absorbed on the soil granule mineralize and produce calcium carbonate crystal continuously, the soil mass granule of cementation, improve the soil mass intensity, realize the reinforcement to the ground.
Disadvantages of the first prior art
When the microorganism grouting is used for reinforcing the foundation, the bacterium liquid and the cementing liquid diffuse and seep to the soil body through the grouting pipe, the calcium carbonate crystallization speed near the grouting pipe opening is high, the blockage is easy to form, the microorganism is difficult to convey to an area far away from the grouting pipe, the soil body reinforcing effect of the far end is poor, the soil body reinforcing area is small, and the reinforcing body strength is low and the uniformity is poor.
Technical scheme of prior art II
The microorganism stirring pile is used for reinforcing the foundation, the bacterial liquid and the cementing liquid containing calcium salt and urea are stirred together or sequentially and injected into the foundation to be reinforced, and the soil body, the bacterial liquid and the cementing liquid are mixed by rotating and stirring the stirring blades of the stirring pile machine to form a reinforced body.
The second prior art has the defects
The microorganism stirring pile can be made into a cylindrical pile body with certain strength and uniform texture, but because the speed of the microorganism induced calcium carbonate reaction is fast and difficult to control, when the stirring pile machine is constructed, in the process that the stirring blades continuously stir and cut the soil body, calcium carbonate cement among soil particles forms inter-particle connection and is stirred and damaged at the same time. When the stirring is stopped, most of the calcium carbonate crystals possibly only play a role in filling the pores of the soil body, the residual effective inter-particle cementation is less, and the final pile is not high in strength or ineffective in reinforcement.
Disclosure of Invention
The prior art can not well solve the problem of low strength of the microorganism stirring pile, the microorganism soil stabilization technology is characterized in that bacteria liquid and cementing liquid are conveyed into a soil body, an alkaline environment formed by urea hydrolysis reaction is favorable for calcium ions in calcium salt to be adsorbed on the surface of soil particles, the calcium ions and carbonate ions generated by urea hydrolysis reaction are combined into calcium carbonate crystals and are continuously increased, and the surfaces of the soil particles are wrapped and bridged, so that the cementing and filling effects are achieved. However, the reaction rate of the microorganism induced calcium carbonate crystallization is fast and difficult to control, the generated cement body can be damaged in the stirring pile-forming process, and finally the calcium carbonate which should be used as the cement only plays a role in filling the pores of the soil body, and the strength of the reinforced body cannot be expected.
The principle of the invention is as follows: after the bacteria liquid and the cementing liquid containing calcium salt and urea enter the magnetization processor from the pipeline, magnetic lines of force are cut repeatedly in the vertical direction, the activity of microorganism individuals is inhibited under the action of Lorentz force, and meanwhile, Ca in the solution is restrained by the magnetic field2+And
the Brownian movement speed, the ion concentration near the magnetic line is higher, and the movement directions of the anions and the cations are opposite, thereby increasing Ca2+And
the chance of meeting. Ca2+And
the calcium carbonate exists in the form of hydrated ions in a solution, the hydration state of the ions is changed due to mutual collision of the ions, a large number of single water molecules are generated while calcium carbonate crystals are generated, the activity of the water molecules is continuously increased, the more the hydrated calcium carbonate is generated, the smaller the solubility is, the smaller the supersaturation degree of the calcium carbonate is, and the generation speed of crystal nuclei of the calcium carbonate crystals is inhibited. In addition, the magnetic field has an orientation effect on water molecules, and the calcium carbonate crystals are bound among the water molecules, so that small crystals cannot move freely and are difficult to meet and combine into large crystals. The small crystal calcium carbonate is conveyed into the soil body along with the magnetized microorganism slurry, is stirred by a stirring blade and is uniformly mixed with the foundation soil to be reinforced, and is magnetizedAfter the microbial slurry is gradually separated from the magnetization influence, the microbial activity is gradually recovered, and the microbial individuals and the small crystal calcium carbonate are used as crystallization nucleation points, the calcium carbonate crystals form packages on the surfaces of the soil particles and form bridges among the soil particles to gradually form uniform and high-strength reinforced soil bodies, so that the purpose of reinforcing the foundation is achieved.
The invention aims to solve the problem of low strength of the microbial mixing pile, the cementing liquid and the bacterial liquid are simultaneously conveyed to the soil body together after passing through the magnetization processor, the speed of forming cementing connection among soil particles by microbial-induced calcium carbonate crystallization can be more effectively controlled, the utilization efficiency of materials is improved, and the soil solidifying effect is improved.
The technical scheme of the invention is as follows:
a magnetized solution microorganism soil-fixing device is characterized by comprising a cementing liquid container 1, a bacteria liquid container 2, a cementing liquid input pipe 3, a bacteria liquid input pipe 4, a cementing liquid control valve 5, a bacteria liquid control valve 6, a magnetization processor 7, a magnetized microorganism slurry output pipe 8, a slurry pump 9, a drill rod 10, a microorganism stirring pile body 12, blades 13 and a slurry spraying port 14; the connection relationship of each part of the device is as follows: the cementing liquid container 1 and the bacteria liquid container 2 are respectively connected with a magnetization processor 7 through a cementing liquid input pipe 3 and a bacteria liquid input pipe 4, a cementing liquid control valve 5 is arranged on the cementing liquid input pipe 3, a bacteria liquid control valve 6 is arranged on the bacteria liquid input pipe 4, the outlet of the magnetization processor 7 is connected with a magnetized microorganism slurry output pipe 8, a drill rod 10 is connected after passing through a slurry pump 9, and a slurry spraying port 14 and a blade 13 are arranged in the drill rod 10 within the range of a stirring pile body 12; the magnetization processor (7) is composed of a shell (15) and a magnetic core assembly (16), the magnetic core assembly (16) is composed of a plurality of groups of magnetic blocks NS which are arranged alternately, the magnetic blocks are permanent magnetic or electromagnetic, the magnetic field intensity is 6000-10000 Gauss, the input cementing liquid and the input bacterial liquid are respectively and independently mixed in the magnetization processor (7) after being acted by the magnetic field, and the mixed liquid is output after being acted by the magnetic field.
The invention has the beneficial effects that: (1) large-particle calcium carbonate crystallization can be inhibited before the slurry is mixed with the soil body to be reinforced, the cementation rate is slowed down, the connection damage of a cemented body in the process of stirring and soil fixation is avoided, and the material utilization rate and the strength of the reinforced soil body are improved; (2) the process of injecting the slurry into the soil body by stages is simplified, and the construction period is shortened; (3) the scaling and blockage in the drill rod and the guniting port are avoided, and the maintenance cost of the construction machine is reduced.
Drawings
FIG. 1 is a schematic view of a magnetized solution microorganism soil stabilization device;
FIG. 2 is a schematic sectional view of a magnetization processor
Reference numerals: 1-a cementing liquid container, 2-a bacteria liquid container, 3-a cementing liquid input pipe, 4-a bacteria liquid input pipe, 5-a cementing liquid control valve, 6-a bacteria liquid control valve, 7-a magnetization processor, 8-a magnetization microorganism slurry output pipe, 9-a slurry pump, 10-a drill rod, 11-a foundation to be reinforced, 12-a microorganism stirring pile body, 13-a blade, 14-a slurry spraying opening, 15-a shell and 16-a magnetic core component.
Detailed Description
Example 1
In this example, a magnetized solution microorganism soil-fixing device is used for reinforcing silt foundation, the designed pile length is 8.0m, and the pile diameter is 0.6m, and the magnetized solution microorganism soil-fixing device comprises a cementing liquid container 1, a bacteria liquid container 2, a cementing liquid input pipe 3, a bacteria liquid input pipe 4, a cementing liquid control valve 5, a bacteria liquid control valve 6, a magnetization processor 7, a magnetized microorganism slurry output pipe 8, a slurry pump 9, a drill rod 10, a microorganism stirring pile body 12, blades 13 and a slurry spraying port 14.
The magnetized solution microorganism soil fixation device is characterized in that a magnetized processor 7 is composed of a shell 15 and a magnetic core assembly 16, the magnetic core assembly 16 is composed of a plurality of groups of magnetic blocks NS which are arranged in an alternating mode, the magnetic blocks are permanent magnets, the magnetic field intensity is 6000 gauss, the magnetized processor 7 is connected with a cementing liquid input pipe 3, a bacteria liquid input pipe 4 and a magnetized microorganism slurry output pipe 8, the input cementing liquid and the bacteria liquid are respectively and independently mixed under the action of a magnetic field in the magnetized processor 7, and the mixed liquid is output after the action of the magnetic field.
Example 2
In the embodiment, a magnetized solution microorganism soil fixation device and a magnetized solution microorganism soil fixation method are used for reinforcing a silty clay foundation, the designed pile length is 6.0m, the pile diameter is 0.5m, and the used magnetized solution microorganism soil fixation device consists of a cementing liquid container 1, a bacteria liquid container 2, a cementing liquid input pipe 3, a bacteria liquid input pipe 4, a cementing liquid control valve 5, a bacteria liquid control valve 6, a magnetization processor 7, a magnetized microorganism slurry output pipe 8, a slurry pump 9, a drill rod 10, a microorganism stirring pile body 12, blades 13 and a slurry spraying port 14.
The magnetized solution microorganism soil fixation device is characterized in that a magnetized processor 7 is composed of a shell 15 and a magnetic core assembly 16, the magnetic core assembly 16 is composed of a plurality of groups of magnetic blocks NS which are arranged in an alternating mode at two poles, the magnetic blocks are electromagnetic, the magnetic field intensity is 8000 Gauss, the magnetized processor 7 is connected with a cementing liquid input pipe 3, a bacteria liquid input pipe 4 and a magnetized microorganism slurry output pipe 8, the input cementing liquid and the bacteria liquid are respectively and independently mixed under the action of a magnetic field in the magnetized processor 7, and the mixed liquid is output after being acted by the magnetic field.
Example 3
In the embodiment, a magnetized solution microorganism soil-fixing device and a magnetized solution microorganism soil-fixing method are used for reinforcing clay foundations, the designed pile length is 8.0m, and the pile diameter is 0.6m, and the used magnetized solution microorganism soil-fixing device consists of a cementing liquid container 1, a bacteria liquid container 2, a cementing liquid input pipe 3, a bacteria liquid input pipe 4, a cementing liquid control valve 5, a bacteria liquid control valve 6, a magnetization processor 7, a magnetized microorganism slurry output pipe 8, a slurry pump 9, a drill rod 10, a microorganism stirring pile body 12, blades 13 and a slurry spraying port 14.
The magnetized solution microorganism soil fixation device is characterized in that a magnetized processor 7 is composed of a shell 15 and a magnetic core assembly 16, the magnetic core assembly 16 is composed of a plurality of groups of magnetic blocks NS which are arranged in an alternating mode, the magnetic blocks are electromagnetic, the magnetic field intensity is 10000 gauss, the magnetized processor 7 is connected with a cementing liquid input pipe 3, a bacteria liquid input pipe 4 and a magnetized microorganism slurry output pipe 8, the input cementing liquid and the bacteria liquid are respectively and independently mixed after being acted by a magnetic field in the magnetized processor 7, and the mixed liquid is output after being acted by the magnetic field.
Claims (1)
1. A magnetized solution microorganism soil-fixing device is characterized by comprising a cementing liquid container (1), a bacteria liquid container (2), a cementing liquid input pipe (3), a bacteria liquid input pipe (4), a cementing liquid control valve (5), a bacteria liquid control valve (6), a magnetization processor (7), a magnetized microorganism slurry output pipe (8), a slurry pump (9), a drill rod (10), a microorganism stirring pile body (12), blades (13) and a slurry spraying port (14); the connection relationship of each part of the device is as follows: the cementing liquid container (1) and the bacteria liquid container (2) are respectively connected with a magnetization processor (7) through a cementing liquid input pipe (3) and a bacteria liquid input pipe (4), a cementing liquid control valve (5) is arranged on the cementing liquid input pipe (3), a bacteria liquid control valve (6) is arranged on the bacteria liquid input pipe (4), an outlet of the magnetization processor (7) is connected with a magnetized microorganism slurry output pipe (8), a drill rod (10) is connected after passing through a slurry pump (9), and the drill rod (10) is provided with a slurry spraying port (14) and blades (13) within the range of a stirring pile body (12); the magnetization processor (7) is composed of a shell (15) and a magnetic core assembly (16), the magnetic core assembly (16) is composed of a plurality of groups of magnetic blocks NS which are arranged alternately, the magnetic blocks are permanent magnetic or electromagnetic, the magnetic field intensity is 6000-10000 Gauss, the input cementing liquid and the input bacterial liquid are respectively and independently mixed in the magnetization processor (7) after being acted by the magnetic field, and the mixed liquid is output after being acted by the magnetic field.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921228875.1U CN211368668U (en) | 2019-07-31 | 2019-07-31 | Magnetized solution microorganism soil stabilization device |
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| CN201921228875.1U CN211368668U (en) | 2019-07-31 | 2019-07-31 | Magnetized solution microorganism soil stabilization device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110284491A (en) * | 2019-07-31 | 2019-09-27 | 南京林业大学 | A kind of magnetized solution microorganism soil-fixing device and solid indigenous method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110284491A (en) * | 2019-07-31 | 2019-09-27 | 南京林业大学 | A kind of magnetized solution microorganism soil-fixing device and solid indigenous method |
| CN110284491B (en) * | 2019-07-31 | 2024-07-23 | 南京林业大学 | Magnetized solution microorganism soil solidifying device and method |
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