CN105714765B - A kind of solid indigenous method of microorganism low-temperature slip casting - Google Patents
A kind of solid indigenous method of microorganism low-temperature slip casting Download PDFInfo
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- CN105714765B CN105714765B CN201610071147.9A CN201610071147A CN105714765B CN 105714765 B CN105714765 B CN 105714765B CN 201610071147 A CN201610071147 A CN 201610071147A CN 105714765 B CN105714765 B CN 105714765B
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- 244000005700 microbiome Species 0.000 title claims abstract description 82
- 238000007569 slipcasting Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007787 solid Substances 0.000 title claims description 22
- 239000002689 soil Substances 0.000 claims abstract description 65
- 239000012530 fluid Substances 0.000 claims abstract description 35
- 239000001110 calcium chloride Substances 0.000 claims abstract description 18
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 18
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 17
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004202 carbamide Substances 0.000 claims abstract description 17
- 241000894006 Bacteria Species 0.000 claims abstract description 15
- 108090000790 Enzymes Proteins 0.000 claims abstract description 7
- 102000004190 Enzymes Human genes 0.000 claims abstract description 7
- 230000001580 bacterial effect Effects 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 238000005660 chlorination reaction Methods 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims 1
- 230000002906 microbiologic effect Effects 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 238000005119 centrifugation Methods 0.000 abstract description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 37
- 229910000019 calcium carbonate Inorganic materials 0.000 description 18
- 239000000243 solution Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 13
- 239000002245 particle Substances 0.000 description 13
- 239000004568 cement Substances 0.000 description 8
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011859 microparticle Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 108010046334 Urease Proteins 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 101000965313 Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513) Aconitate hydratase A Proteins 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 235000010254 Jasminum officinale Nutrition 0.000 description 1
- 240000005385 Jasminum sambac Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002068 microbial inoculum Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2103/00—Civil engineering use
Abstract
A kind of method of microorganism low-temperature slip casting, step includes：A. the grouting tube 2 of low temperature grouting equipment is squeezed into ground 3；B. get rid of the microorganism after existing biology enzyme with centrifugation and configure 4 DEG C of low temperature bacterium solutions（Bacterial concentration OD600=1.2 or so）, with 4 DEG C of calcium chloride and the mixed liquor of urea（Calcium chloride concentration is 0.10mol/L ~ 0.50mol/L, and urea concentration is 0.10mol/L ~ 0.50mol/L）Microorganism consolidating fluid is mixed and made into, and keeping temperature is 4 DEG C；C. by microorganism consolidating fluid 4 by injecting the soil body to be solidified by 1,2,5,6, the 7 low temperature grouting equipments constituted；D. go up after the soil temperature after slip casting to 15 DEG C of constant temperature, stand 1h；E. repeat the operation of the step of c, d two, when microorganism consolidating fluid can not inject the soil body or soil strength reaches requirement, stop slip casting.
Description
Technical field
It is apt to soil strength uniformity the present invention relates to the solid land reform of microorganism low-temperature slip casting and improves the grouting process enhancing soil body
The method of intensity, belongs to the technical field of foundation soil body reinforcing.
Background technology
Existing microorganism slip casting soil retaining technology is by injecting microbial inoculum and nutritive salt into soil, utilizing microorganism
Calcium carbonate crystallization technique (MICP technologies) is induced, it is finally quick in hole between soil particle to separate out between calcium carbonate crystal, soil particle
Connect integral by the cementation of calcium carbonate, play a part of solidifying main normal using microorganism in the soil body, current engineering
Warm slip casting solidification sand and silt.
The technical scheme of prior art one
Microorganism normal temperature slip casting solidification sand mainly improves intensity by inducing inorganic mineral to precipitate cement particle, improves sand
The shearing rigidity and ultimate bearing capacity of soil, microorganism normal temperature slip casting are injected a certain amount of bacterium solution into sand, then irrigated first
Cementing solution (urea-CaCl2) so that the continuous mineralising generation calcite gel of microorganism of the absorption in sand particle, solidify sand
Soil particle.
The shortcoming of prior art one
For control reaction rate, microorganism normal temperature slip casting solidification sand uses wheel streamer bacterium solution and mixed with calcium chloride
Liquid, grouting method solidification soil body lack of homogeneity, the cycle is long, and efficiency is low, and stock utilization is low, easily causes injecting paste material waste,
Economic benefit is low.
The technical scheme of prior art two
Appropriate deionized water and microorganism are incorporated into dry ground, uniform mixing, sample are made, stand a period of time,
Bacterium is set fully to adsorb, then low speed injects the CaCl of low concentration2Mixed solution (Min Lee Lee, Wei Song Ng, Yasuo,
Tanaka.Stress-deformation and compressibility response of bio-medisted
Residual soils [J] .Ecological Engineering, 2013,60 (2013):142-149).
The shortcoming of prior art two
The microbial biomass adsorbed on the grouting method soil body is few, and calcium carbonate nucleating point is few, and the carbonate that its mineralising is produced
Content is low, and soil strength is improved and is restricted.
The technical scheme of prior art three
Mix microorganism and its fluid nutrient medium respectively in soil, the mixed liquor uniform mixing with calcium chloride and urea, Gu
Change the soil body.(permitted Chaoyang, research [J] industrial buildings .2009 that a jasmine bio-modification influences on silt engineering properties, 39 (3)：
60-61)。
The shortcoming of prior art three
Microorganism is mixed and stirred during soil sample, and original adhesive bond is destroyed, and new adhesive bond generation, soil strength is improved
Amplitude very little, Practical Project poor performance, engineering application value is small.
The technical scheme of prior art four
The sand sample being made is immersed in microorganism binding liquid, it is micro- after binding liquid free permeation to soil body hole
Biomineralization metabolism causes the change of Pore Solution pH value and urase reaction, produces the calcium carbonate crystal solidification soil body (the microorganisms such as Zhao Qian
Induce precipitation of calcium carbonate (MICP) curing soil experimental study [D] Beijing China University of Geosciences Ph.D. Dissertation, 2014).
The shortcoming of prior art four
Microbial mineralization metabolism causes the change of Pore Solution pH value and urase reaction, separates out the carbonate crystallization of generation, week
Phase is long, and reaction is slow, is easily realized in laboratory environment, but relatively difficult to practical engineering application.
The content of the invention
In summary, there is certain deficiency, microorganism normal temperature using the solid earthwork case of microorganism normal temperature in current engineering
Slip casting solidifies sand grains so that sand intensity is greatly improved, but the slip casting cycle is longer, and efficiency is low, material profit
Low with rate, microorganism normal temperature slip casting solidification silt, grouting port is easily blocked, and silt intensity is uneven, and intensity is improved and is restricted, this
The principle of invention is：Microorganism consolidating fluid is before the injection soil body and the injection soil body is in cryogenic conditions, microorganism and urase initial stage
Working active is suppressed, and is reduced biological urase decomposing urea speed, is made the quantity of the carbanion of generation few, significantly drop
Low reaction speed and the generation for delaying calcium carbonate cement, microorganism consolidating fluid can enter the soil body without occurring glue with free permeation
Knot, will not also block soil body duct, and in microorganism consolidating fluid after the injection soil body a period of time, soil temperature is by environment temperature
Influence is progressively gone up, and the activity of microorganism and urase is gradually stepped up, and promotes quickly generating for calcium carbonate, and early stage cryogenic conditions are produced
Calcium carbonate microparticle can promote microorganism adsorption in forming biomembrane on soil particle, as calcarinate after latter temperature rise
Cementing quantity and intensity between the nucleating point of crystallization, increase soil particle, lift soil body solidification effect.
It is an object of the invention to provide a kind of solid indigenous method of microorganism low-temperature slip casting, by changing the temperature of slip casting solution,
And be changed to wheel streamer bacterium solution and mixed liquor to mix the single slip casting of single liquid, shorten the slip casting cycle, improve resource utilization, Er Qieyou
Effect solves the non-uniformity problem of microorganism normal temperature slip casting, so as to form the solid earthwork case of a new microorganism slip casting.
Technical scheme is as follows：
A kind of solid indigenous method of microorganism low-temperature slip casting, this method step is as follows：
A. according to Practical Project foundation soil situation, selection summer is constructed, by design requirement by low temperature grouting equipment
Grouting tube 2 squeeze into sand foundation 3；
B. get rid of the microorganism after existing biology enzyme with centrifugation and configure 4 DEG C of low temperature bacterium solutions and 4 DEG C of calcium chloride and urine
The mixed liquor of element is mixed and made into microorganism consolidating fluid, and keeping temperature is 4 DEG C, wherein bacterial concentration OD600=1.2, calcium chloride is dense
Spend for 0.50mol/L, urea concentration is 0.50mol/L；
C. the 4 DEG C of psychrophile consolidating fluids 4 matched will be loaded in cool-bag 1, controls insulation to hold by temperature control system 7
Fluid temperature in device 1 remains at 4 DEG C, opens valve 6, and grouting tube 2 is injected by grouting pump 5, treats that consolidating fluid penetrates into
Reinforcing area 8, stops slip casting；
D. after ground temperature recovery is constant to 15 DEG C, 1h is stood；
E. c, d operation is repeated, until when soil strength reaches that requirement or microorganism consolidating fluid can not inject, stopping note
Slurry.
The solid indigenous method of described microorganism low-temperature slip casting, the microorganism after existing biology enzyme is got rid of using centrifuging
Configure low temperature bacterium solution, bacterial concentration OD600=1.2.
The solid indigenous method of described microorganism low-temperature slip casting, microorganism used therefor consolidating fluid temperature is at 4 DEG C during slip casting.
The solid indigenous method of described microorganism low-temperature slip casting, described calcium chloride, urea mixed solution concentration must be according to soil
Species is rationally determined, it is however generally that, it is 0.10mol/L~0.50mol/L to control calcium chloride concentration, and urea concentration is 0.10mol/
L~0.50mol/L.
The solid indigenous method of described microorganism low-temperature slip casting, described microorganism consolidating fluid is by low temperature bacterium solution and low temperature chlorination
The single liquid of calcium, urea solution mixing composition, order injects the soil body to each component simultaneously in no particular order.
The solid indigenous method of described microorganism low-temperature slip casting, after 4 DEG C of described low temperature slip castings there is rise process in soil temperature,
Soil temperature gos up to 15 DEG C.
Beneficial effects of the present invention：
(1) low temperature grouting and reinforcing soil effectively improves the uniformity of soil stabilization, overcomes that the slip casting mouth of pipe is susceptible to plugging to ask
Topic, improves solid native effect.
(2) microorganism low-temperature slip casting can realize many wheel slip castings to fine grained soil, strengthen soil strength.
(3) note bacterium, note calcium chloride are carried out respectively with normal temperature state, compared with urea mixed solution, low temperature slip casting by bacterium solution with
Slip casting is changed to mix single liquid single slip casting shortening slip casting time mixed liquor in turn, improves operating efficiency.
(4) the replacement ejection of different injecting paste materials is reduced, stock utilization is high, saves processing cost.
Brief description of the drawings
The solid native device of Fig. 1 microorganism low-temperatures slip casting
Reference：1-cool-bag, 2-grouting tube, 3-ground, 4-4 DEG C of microorganism consolidating fluids, 5-slip casting
Pump, 6-valve, 7-temperature control system, 8-stabilization zone.
Embodiment
Embodiment 1
In this example, a kind of solid indigenous method of microorganism low-temperature slip casting is used to solidify sand foundation, and this method includes following step
Suddenly：
A. according to Practical Project foundation soil situation, selection summer is constructed, by design requirement by low temperature grouting equipment
Grouting tube 2 squeeze into sand foundation 3；
B. get rid of the microorganism after existing biology enzyme with centrifugation and configure 4 DEG C of low temperature bacterium solutions and 4 DEG C of calcium chloride and urine
The mixed liquor of element is mixed and made into microorganism consolidating fluid, and keeping temperature is 4 DEG C, wherein bacterial concentration OD600=1.2, calcium chloride is dense
Spend for 0.50mol/L, urea concentration is 0.50mol/L；
C. the 4 DEG C of psychrophile consolidating fluids 4 matched will be loaded in cool-bag 1, controls insulation to hold by temperature control system 7
Fluid temperature in device 1 remains at 4 DEG C, opens valve 6, and grouting tube 2 is injected by grouting pump 5, treats that consolidating fluid penetrates into
Reinforcing area 8, stops slip casting；
D. after ground temperature recovery is constant to 15 DEG C, 1h is stood；
E. c, d operation is repeated, until when soil strength reaches that requirement or microorganism consolidating fluid can not inject, stopping note
Slurry.
In this example, the reinforcement mechanism of the solid soil of microorganism low-temperature slip casting is：1st, low temperature suppresses microorganism and its decomposed to produce
Urase activity, after the completion of slip casting, soil temperature go up during, microorganism and urease activity are gradually stepped up, work
Making performance gradually strengthens, generation calcarinate crystallization.2nd, the calcium carbonate microparticle that early stage cryogenic conditions are produced promotes microorganism to inhale
Invest on soil particle, microorganism turns into the nucleating point of cementing calcium carbonate crystal after the heating of the later stage soil body, improve cement generation
Rate and stock utilization.3rd, microorganism induction precipitation of calcium carbonate cement particle produces cementation solidifying effect.
Embodiment 2
In this example, (silt is natural in place for solidifying silt foundation for a kind of solid indigenous method of microorganism low-temperature slip casting
Void ratio is that 0.87), this method comprises the following steps：
A. according to Practical Project foundation soil situation, selection summer is constructed, by design requirement by low temperature grouting equipment
Grouting tube squeeze into silt foundation；
B. get rid of the microorganism after existing biology enzyme with centrifugation and configure 4 DEG C of low temperature bacterium solution (bacterial concentration OD600=
1.2), the mixed liquor (calcium chloride concentration is 0.25mol/L, and urea concentration is 0.25mol/L) with 4 DEG C of calcium chloride and urea is mixed
Microorganism consolidating fluid is made, and keeping temperature is 4 DEG C；
C. the 4 DEG C of psychrophile consolidating fluids 4 matched will be loaded in cool-bag 1, controls insulation to hold by temperature control system 7
Fluid temperature in device 1 remains at 4 DEG C, opens valve 6, and grouting tube 2 is injected by grouting pump 5, treats that consolidating fluid penetrates into
Reinforcing area 8, stops slip casting；
D. after ground temperature recovery is constant to 15 DEG C, 1h is stood；
E. c, d operation is repeated, until when soil strength reaches that requirement or microorganism consolidating fluid can not inject, stopping note
Slurry.
In this example, the reinforcement mechanism of the solid soil of microorganism low-temperature slip casting is：1st, low temperature suppresses microorganism and its decomposed to produce
Urase activity, after the completion of slip casting, soil temperature go up during, microorganism and urease activity are gradually stepped up, work
Making performance gradually strengthens, generation calcarinate crystallization.2nd, the calcium carbonate microparticle that early stage cryogenic conditions are produced promotes microorganism to inhale
Invest on soil particle, microorganism turns into the nucleating point of cementing calcium carbonate crystal after the heating of the later stage soil body, improve cement generation
Rate and stock utilization.3rd, microorganism induction precipitation of calcium carbonate cement particle produces cementation solidifying effect.
Embodiment 3
In this example, (silt is natural in place for solidifying silt foundation for a kind of solid indigenous method of microorganism low-temperature slip casting
Void ratio is that 0.42), this method comprises the following steps：
A. according to Practical Project foundation soil situation, selection summer is constructed, by design requirement by low temperature grouting equipment
Grouting tube squeeze into silt foundation；
B. get rid of the microorganism after existing biology enzyme with centrifugation and configure 4 DEG C of low temperature bacterium solution (bacterial concentration OD600=
1.2), the mixed liquor (calcium chloride concentration is 0.10mol/L, and urea concentration is 0.10mol/L) with 4 DEG C of calcium chloride and urea is mixed
Microorganism consolidating fluid is made, and keeping temperature is 4 DEG C；
C. the 4 DEG C of psychrophile consolidating fluids 4 matched will be loaded in cool-bag 1, controls insulation to hold by temperature control system 7
Fluid temperature in device 1 remains at 4 DEG C, opens valve 6, and grouting tube 2 is injected by grouting pump 5, treats that consolidating fluid penetrates into
Reinforcing area 8, stops slip casting；
D. after ground temperature recovery is constant to 15 DEG C, 1h is stood；
E. c, d operation is repeated, until when soil strength reaches that requirement or microorganism consolidating fluid can not inject, stopping note
Slurry.
In this example, the reinforcement mechanism of the solid soil of microorganism low-temperature slip casting is：1st, low temperature suppresses microorganism and its decomposed to produce
Urase activity, after the completion of slip casting, soil temperature go up during, microorganism and urease activity are gradually stepped up, work
Making performance gradually strengthens, generation calcarinate crystallization.2nd, the calcium carbonate microparticle that early stage cryogenic conditions are produced promotes microorganism to inhale
Invest on soil particle, microorganism turns into the nucleating point of cementing calcium carbonate crystal after the heating of the later stage soil body, improve cement generation
Rate and stock utilization.3rd, microorganism induction precipitation of calcium carbonate cement particle produces cementation solidifying effect.
Claims (2)
1. the solid indigenous method of a kind of microorganism low-temperature slip casting, it is characterised in that this method step is as follows：
A. according to Practical Project foundation soil situation, selection summer is constructed, by design requirement by the note of low temperature grouting equipment
Starch floral tube（2）Squeeze into sand foundation（3）；
B. got rid of the microorganism after existing biology enzyme and configured 4 DEG C of low temperature bacterium solutions and 4 DEG C of calcium chloride and urea with centrifuging
Mixed liquor is mixed and made into microorganism consolidating fluid, and keeping temperature is 4 DEG C, wherein bacterial concentration OD600=1.2, calcium chloride concentration is
0.10~0.50mol/L, urea concentration is 0.10~0.50mol/L；
C. by cool-bag（1）It is interior to load the 4 DEG C of psychrophile consolidating fluids matched（4）, by temperature control system（7）Control insulation
Container（1）Interior fluid temperature remains at 4 DEG C, opens valve（6）, pass through grouting pump（5）Inject grouting tube（2）, treat
Consolidating fluid penetrates into reinforcing area（8）, stop slip casting；
D. after ground temperature recovery is constant to 15 DEG C, 1h is stood；
E. c, d operation is repeated, until when soil strength reaches that requirement or microorganism consolidating fluid can not inject, stopping slip casting.
2. a kind of solid indigenous method of microorganism low-temperature slip casting according to claim 1, it is characterised in that described microbiological gum
Knot liquid mixes the single liquid constituted with low temperature chlorination calcium, urea solution by low temperature bacterium solution, and each component is in no particular order sequentially simultaneously
Inject the soil body.
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| CN110344392A (en) * | 2019-08-07 | 2019-10-18 | 南京林业大学 | A kind of microorganism soil-fixing apparatus and method of electrostatic slow setting processing |
| CN111287770A (en) * | 2020-03-05 | 2020-06-16 | 中煤能源研究院有限责任公司 | Method for preventing coal wall caving by reinforcing coal body through microbial grouting |
| CN112030942A (en) * | 2020-08-31 | 2020-12-04 | 南京林业大学 | Method for improving liquefaction resistance of foundation by silicate mineral decomposing bacteria |
| CN113585301B (en) * | 2021-09-02 | 2022-05-17 | 南京大学 | Method for treating rock slope collapse by using microbial film and MICP (micro-emulsion-phase phosphate) technology |
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| JP4599611B2 (en) * | 2004-11-17 | 2010-12-15 | 国立大学法人北海道大学 | Ground improvement method and grout used in the method |
| JP4240501B2 (en) * | 2006-06-14 | 2009-03-18 | 強化土エンジニヤリング株式会社 | Ground improvement method |
| CN101275393A (en) * | 2007-03-27 | 2008-10-01 | 上海华海特殊环境工程有限公司 | Method for controlling running sand in underground engineering and grouting system therefor |
| JP5458332B1 (en) * | 2013-03-04 | 2014-04-02 | 強化土株式会社 | Ground improvement method |
| CN104452740B (en) * | 2014-11-21 | 2017-03-15 | 淮海工学院 | A kind of method of Reinforcement liquefaction sand foundation |
| CN104631430B (en) * | 2014-12-29 | 2016-06-29 | 南京林业大学 | A kind of method of microorganism slip casting sand drain soft soil foundation |
| CN104818719B (en) * | 2015-03-16 | 2018-02-23 | 山东建筑大学 | A kind of microorganism grouting method for improving calcium carbonate early stage deposition |
| CN105155510B (en) * | 2015-08-07 | 2017-04-12 | 华中科技大学 | Method capable of carrying out microorganism solidifying and crusting on super soft foundation surface and matching device |
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| CN109811745A (en) * | 2019-02-22 | 2019-05-28 | 河海大学 | A kind of soil in-situ priming device and its application method |
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