CN106701100A - Saline soil roadbed filler and method for improving roadbed - Google Patents
Saline soil roadbed filler and method for improving roadbed Download PDFInfo
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- CN106701100A CN106701100A CN201710013851.3A CN201710013851A CN106701100A CN 106701100 A CN106701100 A CN 106701100A CN 201710013851 A CN201710013851 A CN 201710013851A CN 106701100 A CN106701100 A CN 106701100A
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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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
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- 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
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Abstract
The invention relates to the field of geotechnical engineering and discloses a saline soil roadbed filler and a method for improving a roadbed. The saline soil roadbed filler provided by the invention contains saline soil, soluble calcium salt, urea and a microbial preparation, wherein the microbial preparation contains urease and/or bacteria producing the urease. The saline soil roadbed filler provided by the invention has higher compressive strength; meanwhile, as microorganisms extensively existed in soil body are used, harm can not be done to the environment or a human body, the saline soil roadbed filler has the advantage of being environmentally friendly, a maintenance period also can be shortened, and construction efficiency is improved.
Description
Technical field
The present invention relates to Geotechnical Engineering field, in particular it relates to a kind of Salty Soil Subgrade filler and by the salt marsh dirt road
The method that based filler is used for roadbed improvement.
Background technology
Roadbed as whole traffic and transportation system important component, it directly bears superstructure load and vehicle is quiet
The long term of dynamic load, and the quality of roadbed quality directly affects road speed and traffic safety, it is therefore necessary to using excellent
The roadbed filling of matter is filled.Into 21st century, with China Express Railway, personal rapid transit special line, at a high speed heavy haul railway, public affairs
The increasingly quickening of road, railway tunnel, vcehicular tunnel and metro construction, and the coastal strategy of country and strategy to develop western regions
Deep propulsion, increasing foundation engineering construction be located at saline soil area.However, because the salt content of salinized soil is higher,
And it is extremely disadvantageous to engineering construction with engineering problems such as molten sunken, salt is swollen, corrosion.
At present, in salinized soil engineering construction, high-quality roadbed filling is generally bought using remote transport or building stones factory
Mode is improved to Salty Soil Subgrade, but buying high quality filler by remote transport or producer certainly will cause subgrade engineering
Cost is too high, duration process the problems such as.Therefore, with reference to the condition that construction is local, improvement in situ is carried out by salinized soil, is allowed to
Meeting the basic demand of roadbed filling and later stage operation, to become be Salty Soil Subgrade engineering construction problem urgently to be resolved hurrily.
Traditional soil improvement method carries out soil often through a series of stronger chemical curing agent of contaminatives is added
Solidification.But, due to, containing various salinities and salt content is higher, using the effect of conventional curing agent stabilized saline soil in salinized soil
It is really unsatisfactory.For example, the most frequently used curing agent cement, it plays solidification and is mainly by forming aquation silicon to common roadbed
Sour calcium (CSH), and a large amount of sulfate, villaumite, carbonate for existing etc. in salinized soil, have a strong impact on generation and the stabilization of CSH, from
And cause the intensity of the salinized soil of cement solidification very low.Simultaneously as the salt ion in salinized soil largely exists for a long time, cement is solid
The salt erodibility endurance of the salinized soil of change is very weak, so using Cement-Stabilized Saline Soil, it is difficult to ensure the intensity of solidified earth, and is difficult to full
The requirement of sufficient project durability.And existing other soil-solidified-agents, realize that the hydrated product of solidification effect is still mainly CSH,
So all there is above-mentioned problem of solidification.In addition, existing chemical curing agent (such as fine cement, epoxy resin, acrylamide,
Phenolic resin, polyurethane etc.) there is toxicity or danger higher to a certain extent.
Therefore, be badly in need of finding that a kind of improved effect is good, curing cycle is short, the method for low cost and the improvement roadbed of environmental protection.
The content of the invention
The invention aims to overcome drawbacks described above present in prior art, there is provided a kind of Salty Soil Subgrade is filled out
Material and the method that the Salty Soil Subgrade filler is used for roadbed improvement.The road that the Salty Soil Subgrade filler that the present invention is provided is formed
Base, with compression strength higher, and also the advantage with low cost and environmental protection.
To achieve these goals, the invention provides a kind of Salty Soil Subgrade filler, wherein, the Salty Soil Subgrade filler
Containing salinized soil, soluble calcium salt, urea and microorganism formulation, the microorganism formulation contains the bacterium of urase and/or urease-producing.
Present invention also offers a kind of method for improveing roadbed, the method includes：Roadbed filling is applied to the table of the soil body
Face, wherein, the roadbed filling is above-mentioned Salty Soil Subgrade filler.
The present invention is by the microorganism formulation of salinized soil and the bacterium containing urase and/or urease-producing, soluble calcium salt and urea
It is applied in combination, the Ca produced using soluble calcium salt2+The CO produced with urase decomposing urea3 2-Form water insoluble calcium carbonate
Crystal, the calcium carbonate crystal bonds salt marsh soil particle as binding material, the salinized soil grain skeleton of stabilization is formed, so as to carry
Rise the compression strength of salinized soil.Simultaneously as the microorganism being widely present in using the soil body, will not make to environment and human body
Into harm, the advantage with environmental protection, and also curing cycle can be shortened, improve efficiency of construction.
Particularly, the roadbed filling that the present invention is provided is, with salinized soil as raw material, can to carry out original position to the salinized soil soil body
Transformation, so as to avoid financial cost higher and the duration more long caused by long-distance sand transport improvement roadbed filling, therefore,
Advantage with reduces cost and shortening duration, has a good application prospect.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Specific embodiment
Specific embodiment of the invention is described in detail below.It should be appreciated that described herein specific
Implementation method is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points and any value of disclosed scope are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
One or more can be obtained with combination with one another between the endpoint value of individual scope and single point value, and individually between point value
New number range, these number ranges should be considered as specific open herein.
The invention provides a kind of Salty Soil Subgrade filler, wherein, the Salty Soil Subgrade filler contains salinized soil, solubility
Calcium salt, urea and microorganism formulation, the microorganism formulation contain the bacterium of urase and/or urease-producing.
According to the present invention, in terms of butt, relative to the salinized soil of 100 weight portions, the content of the soluble calcium salt can be with
It is 1-40 weight portions, the content of the urea can be 2-30 weight portions, and the content of the microorganism formulation can be 1-20 weights
Amount part；
Preferably, in terms of butt, relative to the salinized soil of 100 weight portions, the content of the soluble calcium salt is 1-10 weights
Amount part, the content of the urea is 4-12 weight portions, and the content of the microorganism formulation is 4-6 weight portions.
In the present invention, term " salinized soil " refers to solonchak and alkaline earth and various salinization, the general name of alkali-affected soil.At me
State, salinized soil is mainly distributed on inland arid, semiarid zone and coastal region.
There is no particular limitation in source of the present invention to the salinized soil, can gather comfortable China's salinized soil and mainly be distributed
Area.
According to the present invention, the salt content of the salinized soil is more than or equal to 0.3 weight %, preferably 0.3-10 weight %, more
Preferably 1-5 weight %.In the present invention, salt content is measured using oven drying method or conductance method.
In the present invention, the particle diameter of the salinized soil is more than or equal to 0.05mm, preferably 0.075-2mm, more preferably
0.25-2mm。
In the present invention, the salinized soil can be chlorine saline soil, sulfate-salinized soil, carbonate-saline soil, sub- chlorine saline soil
With at least one in sulfurous acid salinized soil, the preferably at least one in chlorine saline soil, sulfate-salinized soil and carbonate-saline soil.
According to the present invention, to the species of the soluble calcium salt, there is no particular limitation, as long as free calcium can be provided
Ion, for example, the soluble calcium salt can be selected from calcium chloride, calcium nitrate, calcium dihydrogen phosphate, calcium bicarbonate, hydrogen sulfate
In at least one in calcium, calcium bisulfite, calcium bromide and calcium iodide, preferably calcium chloride, calcium bromide and calcium iodide at least
It is a kind of.
There is no particular limitation for type of service of the present invention to the soluble calcium salt, can be solution and/or solid
Form, for example, when form of the soluble calcium salt for solution, can directly use；When the soluble calcium salt is solid
Form when, can be first configured to solution and be used, or can in presence of water, by solid solubility calcium salt and remaining
Raw material mixes.
In the present invention, to the form of the microorganism formulation, there is no particular limitation, if can ensure urase and/or
The bacterium of urease-producing has bioactivity, for example, can be the form of liquid and/or solid, it is preferable that when the microorganism
When preparation is liquid form, wherein any solvent of the bioactivity also containing the bacterium for being suitable to keep urase and/or urease-producing, example
Such as, the solvent can be culture medium commonly used in the art.
In the present invention, to the source of the microorganism formulation, there is no particular limitation, for example, can be by conventional business
Available from, it is also possible to prepared by conventional biological means.
According to the present invention, on the basis of the total amount of the salinized soil, the content of the bacterium of the urease-producing can be at least 1
×107CFU/g, preferably 1-100 × 107CFU/g。
In the present invention, the bacterium of the urease-producing can be bacillus and/or coccus, preferably bacillus, gemma coccus,
At least one in proteus and micrococcus, more preferably Pasteur's gemma sarcine, Bacillus pasteurii, urea pellets bacterium
With at least one in helicobacter pylori, more preferably Pasteur's gemma sarcine (Sporosarcina
) and/or Bacillus pasteurii (Bacillus pasteurii) pasteurii.
According to the present invention, the pH value of the Salty Soil Subgrade filler can be 6-9, preferably 7-8；Water content can be
10-40 weight %, preferably 20-30 weight %.
In the present invention, in order to ensure the Salty Soil Subgrade filler pH value within the above range, the salt marsh dirt road
Based filler can also contain pH adjusting agent, and relative to the salinized soil of 100 weight portions, the content of the pH adjusting agent is 0.1-10 weights
Amount part, preferably 0.5-5 weight portions.
In the present invention, to the pH adjusting agent, there is no particular limitation, can be commonly used in the art for adjusting
The various acid and/or alkaline, inorganic salts of section pH, it is preferable that the pH adjusting agent is in sodium acid carbonate and/or saleratus
It is at least one.
Present invention also offers the preparation method of above-mentioned Salty Soil Subgrade filler, the preparation method include by salinized soil, can
Dissolubility calcium salt, urea and microorganism formulation mixing, the microorganism formulation contain the bacterium of urase and/or urease-producing.Wherein, each original
The consumption of material, species and performance parameter etc. are as described above, will not be repeated here.
In the present invention, to the condition of the mixing, there is no particular limitation, as long as each raw material can be made well mixed i.e.
Can, for example, the form of the mixing can be stirring, the temperature of the mixing can be 20-45 DEG C.
According to the present invention, present invention also offers a kind of method for improveing roadbed, the method includes：Roadbed filling is applied
In the surface of the soil body, wherein, the above-mentioned Salty Soil Subgrade filler that the roadbed filling is provided for the present invention.
According to the present invention, the condition of the administration can include：Temperature is 10-40 DEG C, preferably 30-35 DEG C；PH value is
5-10, preferably 6-9；Time is 5-21 days, preferably 7-14 days.
In the present invention, the mode of the administration can be pave, at least one in mix and injection.
According to the present invention, methods described can also include：Sprinkled water during the administration and compaction treatment, institute
State watering and cause that the water content of the roadbed filling is 10-40 weight %, preferably 20-30 weight %.
In the present invention, to the type of the soil body, there is no particular limitation, can be the common soil body, or special
The different soil body, it is preferable that the soil body is made up of salinized soil, that is to say, that in the Salty Soil Subgrade filler that the present invention is provided
The salinized soil can be obtained by in-situ acquisition.
In the present invention, the salt content of the soil body is more than or equal to 0.3 weight %, preferably 0.3-10 weight %, more excellent
Elect 1-5 weight % as；Preferably, the particle diameter of the soil body is more than or equal to 0.05mm, preferably preferably 0.075-2mm, 0.25-
2mm；It is highly preferred that the water content of the soil body is 10-40 weight %, preferably 20-30 weight %；It is further preferred that institute
The soil body is stated by least one structure in chlorine saline soil, sulfate-salinized soil, carbonate-saline soil, sub- chlorine saline soil and sulfurous acid salinized soil
Into the preferably at least one in chlorine saline soil, sulfate-salinized soil and carbonate-saline soil.
In situations where it is preferred, the invention provides a kind of method for improveing roadbed, the method is comprised the following steps：
(1) salinized soil is gathered from salinized soil soil in-situ, by the salinized soil and soluble calcium salt, urea and microorganism system
Agent mixes, to obtain Salty Soil Subgrade filler；
(2) the Salty Soil Subgrade filler obtained by step (1) is applied to the surface of the salinized soil soil body；
Wherein, the microorganism formulation contains the bacterium of urase and/or urease-producing.
Below will the present invention will be described in detail by embodiment.
In following examples and comparative example,
Salt content in soil is measured according to method disclosed in LY/T 1251-199；
Unconfined compressive strength according to《Railway earthwork test rule TB10102-2010》It is measured.
Preparation example 1
This preparation example is used for the method for illustrating manually to prepare salinized soil.
Sodium sulphate is added into soil particle (gathering from Harbin Bin County suburb), ground and sieving treatment is obtained
Salt content takes 1%, 3%, the 5% artificial salinized soil prepared of its mass fraction respectively, wherein, particle diameter is the soil of 0.25-0.5mm
Earth particle accounts for the 20% of total soil particle weight, and particle diameter accounts for the 20% of total soil particle weight, grain for the soil particle of 0.5-1mm
Footpath accounts for the 60% of total soil particle weight for 1-2mm particles.
Preparation example 2
This preparation example is used to illustrate the preparation method of microorganism formulation.
Pasteur's gemma sarcine (is purchased from China General Microbiological culture presevation administrative center CGMCC, deposit number is
CGMCC NO.1.3687) it is inoculated in culture medium (formula：Beef extract 5g/L, peptone 15g/L, sodium chloride 5g/L) in, in 30 DEG C
Lower culture 48h, it is 1 × 10 to obtain density9The bacterium solution of CFU/mL.
Embodiment 1
The present embodiment is used to illustrate Salty Soil Subgrade filler of present invention offer and preparation method thereof.
100g is weighed to be urinated by salinized soil that the salt content that preparation example 1 is obtained is 1 weight %, 5g anhydrous calcium chlorides powder, 8g
Bacterium solution and 1g sodium acid carbonates that element (being purchased from chemical company of western Shandong, similarly hereinafter), 10mL are obtained by preparation example 2, are placed on and stir
Mix in machine in 0.5h is stirred under room temperature (25 DEG C), obtain Salty Soil Subgrade filler A1 (pH value is 8, and water content is 25 weight %).
After measured, the result of the unconfined compressive strength of Salty Soil Subgrade filler A1 is as shown in table 1.
Embodiment 2
The present embodiment is used to illustrate Salty Soil Subgrade filler of present invention offer and preparation method thereof.
100g is weighed by salinized soil, 10g anhydrous calcium chlorides powder, 12g that the salt content that preparation example 1 is obtained is 1 weight %
Bacterium solution and 0.5g sodium acid carbonates that urea, 30mL are obtained by preparation example 2, are placed in mixer in being stirred under room temperature (25 DEG C)
0.5h, obtains Salty Soil Subgrade filler A2 (pH value is 8, and water content is 30 weight %).
After measured, the result of the unconfined compressive strength of Salty Soil Subgrade filler A2 is as shown in table 1.
Embodiment 3
The present embodiment is used to illustrate Salty Soil Subgrade filler of present invention offer and preparation method thereof.
100g is weighed to be urinated by salinized soil that the salt content that preparation example 1 is obtained is 1 weight %, 1g anhydrous calcium chlorides powder, 4g
Element, the bacterium solutions that are obtained by preparation example 2 of 10mL and 5g sodium acid carbonates, are placed in mixer in being stirred under room temperature (25 DEG C)
0.5h, obtains Salty Soil Subgrade filler A3 (pH value is 7, and water content is 00 weight %).
After measured, the result of the unconfined compressive strength of Salty Soil Subgrade filler A3 is as shown in table 1.
Embodiment 4
The present embodiment is used to illustrate Salty Soil Subgrade filler of present invention offer and preparation method thereof.
Method according to embodiment 1 is carried out, except that, use the salt content obtained by preparation example 1 of identical weight
It is the salinized soil of 3 weight % instead of the salinized soil that the salt content used in embodiment 1 is 1 weight %, obtains Salty Soil Subgrade and fill out
Material A4.
After measured, the result of the unconfined compressive strength of Salty Soil Subgrade filler A4 is as shown in table 1.
Embodiment 5
The present embodiment is used to illustrate Salty Soil Subgrade filler of present invention offer and preparation method thereof.
Method according to embodiment 1 is carried out, except that, use the salt content obtained by preparation example 1 of identical weight
It is the salinized soil of 5 weight % instead of the salinized soil that the salt content used in embodiment 1 is 1 weight %, obtains Salty Soil Subgrade and fill out
Material A5.
After measured, the result of the unconfined compressive strength of Salty Soil Subgrade filler A5 is as shown in table 1.
Embodiment 6
The present embodiment is used to illustrate Salty Soil Subgrade filler of present invention offer and preparation method thereof.
Method according to embodiment 1 is carried out, except that, (had purchased from Shang Hai Tuo Yang biotechnologies using 10g urases powder
Limit company, article No. is Y020089) instead of the bacterium solution that is used in embodiment 1, obtain Salty Soil Subgrade filler A6.
After measured, the result of the unconfined compressive strength of Salty Soil Subgrade filler A6 is as shown in table 1.
Embodiment 7
The method that the present embodiment is used to illustrate the improvement roadbed of present invention offer.
Method according to embodiment 1 is carried out, except that, using the collection of identical weight from the Jiayu Pass to Anxi one-level
(the weight % of salt content 4.5,8) below particle diameter 2mm, pH value is, instead of the salinized soil used in embodiment 1, to obtain to the salinized soil of highway
To Salty Soil Subgrade filler A7.
Salinized soil filler A7 is paved on the soil body of this area, is then compacted, in roadbed maintenance is carried out at 35 DEG C, supported
Constantly sprinkled water during shield, 30 weight % be not less than with the water content for ensureing salinized soil filler A7, after maintenance 7 days, sample into
Row is determined.
After measured, the result of the unconfined compressive strength of Salty Soil Subgrade filler A7 is as shown in table 1.
Comparative example 1
Method according to embodiment 7 is carried out, except that, bacterium solution is added without, obtain roadbed filling D1.
After measured, the result of the unconfined compressive strength of roadbed filling D1 is as shown in table 1.
Comparative example 2
Weigh 100g collection from the Jiayu Pass to Anxi Class I highway salinized soil (salt content 4.5 weight %, particle diameter 2mm with
Under, pH value is 8), to add 24g lime powders, is placed in mixer in 0.5h is stirred under room temperature (25 DEG C), obtains salt marsh
Dirt road based filler D2.
After measured, the result of the unconfined compressive strength of roadbed filling D2 is as shown in table 1.
Table 1
Compared with the result of comparative example 1-2 by by above example 1-7, the Salty Soil Subgrade that the present invention is provided
Filler has compression strength higher, simultaneously as the microorganism being widely present in using the soil body, will not be to environment and people
Body causes harm, the advantage with environmental protection, and also can shorten curing cycle, improves efficiency of construction.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned implementation method
Detail, in range of the technology design of the invention, various simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of Salty Soil Subgrade filler, it is characterised in that the Salty Soil Subgrade filler contains salinized soil, soluble calcium salt, urine
Element and microorganism formulation, the microorganism formulation contain the bacterium of urase and/or urease-producing.
2. Salty Soil Subgrade filler according to claim 1, wherein, in terms of butt, relative to the salt marsh of 100 weight portions
Soil, the content of the soluble calcium salt is 1-40 weight portions, and the content of the urea is 2-30 weight portions, the microorganism formulation
Content be 1-20 weight portions；
Preferably, in terms of butt, relative to the salinized soil of 100 weight portions, the content of the soluble calcium salt is 1-10 weight portions,
The content of the urea is 4-12 weight portions, and the content of the microorganism formulation is 4-6 weight portions.
3. Salty Soil Subgrade filler according to claim 1 and 2, wherein, the salt content of the salinized soil is more than or equal to 0.3
Weight %, preferably 0.3-10 weight %, more preferably 1-5 weight %；
Preferably, the particle diameter of the salinized soil is more than or equal to 0.05mm, more preferably preferably 0.075-2mm, 0.25-2mm；
It is highly preferred that the salinized soil is chlorine saline soil, sulfate-salinized soil, carbonate-saline soil, sub- chlorine saline soil and sulphite
At least one in stain soil.
4. Salty Soil Subgrade filler according to claim 1 and 2, wherein, the soluble calcium salt is selected from calcium chloride, nitric acid
At least one in calcium, calcium dihydrogen phosphate, calcium bicarbonate, calcium bisulfate, calcium bisulfite, calcium bromide and calcium iodide, preferably
At least one in calcium chloride, calcium bromide and calcium iodide.
5. Salty Soil Subgrade filler according to claim 1 and 2, wherein, it is described on the basis of the total amount of the salinized soil
The content of the bacterium of urease-producing is at least 1 × 107CFU/g, preferably 1-100 × 107CFU/g；
Preferably, the bacterium of the urease-producing is bacillus and/or coccus, preferably bacillus, gemma coccus, proteus and small
At least one in coccus, more preferably Pasteur's gemma sarcine, Bacillus pasteurii, urea pellets bacterium and H. pylori
At least one in bacterium, more preferably Pasteur's gemma sarcine (Sporosarcina pasteurii) and/or Pasteur
Bacillus (Bacillus pasteurii).
6. Salty Soil Subgrade filler according to claim 1 and 2, wherein, the pH value of the Salty Soil Subgrade filler is 6-
9, preferably 7-8；Water content is 10-40 weight %, preferably 20-30 weight %；
Preferably, the Salty Soil Subgrade filler also contains pH adjusting agent, and relative to the salinized soil of 100 weight portions, the pH is adjusted
The content for saving agent is 0.1-10 weight portions, preferably 0.5-5 weight portions；
It is highly preferred that the pH adjusting agent is sodium acid carbonate and/or saleratus.
7. a kind of method for improveing roadbed, the method includes：Roadbed filling is applied to the surface of the soil body, it is characterised in that institute
State Salty Soil Subgrade filler of the roadbed filling described in any one in claim 1-6.
8. method according to claim 7, wherein, the condition of the administration includes：Temperature is 10-40 DEG C, preferably 30-
35℃；PH value is 5-10, preferably 6-9；Time is 5-21 days, preferably 7-14 days；
Preferably, the mode of the administration be pave, at least one in mix and injection.
9. the method according to claim 7 or 8, wherein, methods described also includes：Spilt during the administration
Water and compaction treatment, the watering cause that the water content of the roadbed filling is 10-40 weight %, preferably 20-30 weight %.
10. method according to claim 7, wherein, the salt content of the soil body is more than or equal to 0.3 weight %, preferably
0.3-10 weight %, more preferably 1-5 weight %；
Preferably, the particle diameter of the soil body is more than or equal to 0.05mm, more preferably preferably 0.075-2mm, 0.25-2mm；
It is highly preferred that the water content of the soil body is 10-40 weight %, preferably 20-30 weight %；
It is further preferred that the soil body is by chlorine saline soil, sulfate-salinized soil, carbonate-saline soil, sub- chlorine saline soil and sulfurous acid
At least one composition in salinized soil.
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| CN107267152A (en) * | 2017-07-12 | 2017-10-20 | 天津城建大学 | A kind of Inorganic whisker improvement of salt and alkaline land agent |
| CN107365587A (en) * | 2017-07-12 | 2017-11-21 | 天津城建大学 | A kind of Inorganic whisker salinized soil prevents molten sunken agent |
| CN107603637A (en) * | 2017-10-19 | 2018-01-19 | 朱东洋 | A kind of preparation method of biological soil curing agent |
| CN107987845A (en) * | 2017-11-30 | 2018-05-04 | 河海大学 | A kind of bacterium breaks born of the same parents' enzyme liquid dust storm prevention liquid and preparation method thereof |
| CN108049390A (en) * | 2017-11-30 | 2018-05-18 | 河海大学 | A kind of method for breaking born of the same parents' enzyme solution treatment fluid reinforcing silty sand and its soil that desertifies using bacterium |
| CN108824111A (en) * | 2018-06-25 | 2018-11-16 | 重庆大学 | It is a kind of that real method is hit based on biological cementing road foundation |
| CN108929701A (en) * | 2018-09-08 | 2018-12-04 | 佛山市禅城区诺高环保科技有限公司 | A kind of preparation method of hillside soil-solidified-agent |
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| CN109580908A (en) * | 2018-11-07 | 2019-04-05 | 西南石油大学 | A method of sodium sulphate salinized soil is improved based on new material |
| CN110195380A (en) * | 2019-05-17 | 2019-09-03 | 中铁二院工程集团有限责任公司 | Consider Ballast track coarse grain salt marsh dirt road embankment structure and construction method that violent temperature influences |
| CN111501454A (en) * | 2020-04-23 | 2020-08-07 | 山东交通学院 | Method for treating soft soil roadbed at bridge head roadbed transition section based on biological enzyme curing material and construction process |
| CN111501455A (en) * | 2020-04-23 | 2020-08-07 | 山东交通学院 | Construction process for reinforcing roadbed by combining biological enzyme curing material with cured powder soil roadbed and compacted sand piles |
| CN113621379A (en) * | 2021-08-12 | 2021-11-09 | 天津建设发展集团有限公司 | Treatment method for subgrade damage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1778934A (en) * | 2005-10-10 | 2006-05-31 | 东南大学 | Preparation of calcium carbonate by microbe deposition |
| CN101119942A (en) * | 2004-12-20 | 2008-02-06 | 墨道什大学 | Microbial biocementation |
| CN101270369A (en) * | 2008-05-06 | 2008-09-24 | 清华大学 | Microorganism cause concrete or concrete, producing method and application thereof |
| CN103289919A (en) * | 2012-04-23 | 2013-09-11 | 清华大学 | Urease-producing microorganisms and method for solidifying heavy metals in subgrade by using same |
| CN103289921A (en) * | 2012-04-23 | 2013-09-11 | 清华大学 | Urease-producing microbes and curing method for heavy metals in foundation |
| CN103290750A (en) * | 2013-06-04 | 2013-09-11 | 北京航空航天大学 | Road subgrade, base layer and subbase layer made of cementing ultra-strong chloride saline soil and construction method thereof |
| CN105200979A (en) * | 2015-10-16 | 2015-12-30 | 中国科学院新疆生态与地理研究所 | Method for solidifying sand by utilizing halotolerant bacteria |
-
2017
- 2017-01-09 CN CN201710013851.3A patent/CN106701100B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119942A (en) * | 2004-12-20 | 2008-02-06 | 墨道什大学 | Microbial biocementation |
| CN1778934A (en) * | 2005-10-10 | 2006-05-31 | 东南大学 | Preparation of calcium carbonate by microbe deposition |
| CN101270369A (en) * | 2008-05-06 | 2008-09-24 | 清华大学 | Microorganism cause concrete or concrete, producing method and application thereof |
| CN103289919A (en) * | 2012-04-23 | 2013-09-11 | 清华大学 | Urease-producing microorganisms and method for solidifying heavy metals in subgrade by using same |
| CN103289921A (en) * | 2012-04-23 | 2013-09-11 | 清华大学 | Urease-producing microbes and curing method for heavy metals in foundation |
| CN103290750A (en) * | 2013-06-04 | 2013-09-11 | 北京航空航天大学 | Road subgrade, base layer and subbase layer made of cementing ultra-strong chloride saline soil and construction method thereof |
| CN105200979A (en) * | 2015-10-16 | 2015-12-30 | 中国科学院新疆生态与地理研究所 | Method for solidifying sand by utilizing halotolerant bacteria |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109137692A (en) * | 2017-06-13 | 2019-01-04 | 新疆北方建设集团有限公司 | A kind of gobi roadbed salt marsh chemical treatment construction |
| CN107365587A (en) * | 2017-07-12 | 2017-11-21 | 天津城建大学 | A kind of Inorganic whisker salinized soil prevents molten sunken agent |
| CN107267152A (en) * | 2017-07-12 | 2017-10-20 | 天津城建大学 | A kind of Inorganic whisker improvement of salt and alkaline land agent |
| CN107603637A (en) * | 2017-10-19 | 2018-01-19 | 朱东洋 | A kind of preparation method of biological soil curing agent |
| CN107987845A (en) * | 2017-11-30 | 2018-05-04 | 河海大学 | A kind of bacterium breaks born of the same parents' enzyme liquid dust storm prevention liquid and preparation method thereof |
| CN108049390A (en) * | 2017-11-30 | 2018-05-18 | 河海大学 | A kind of method for breaking born of the same parents' enzyme solution treatment fluid reinforcing silty sand and its soil that desertifies using bacterium |
| CN108824111A (en) * | 2018-06-25 | 2018-11-16 | 重庆大学 | It is a kind of that real method is hit based on biological cementing road foundation |
| CN108929701A (en) * | 2018-09-08 | 2018-12-04 | 佛山市禅城区诺高环保科技有限公司 | A kind of preparation method of hillside soil-solidified-agent |
| CN109580908A (en) * | 2018-11-07 | 2019-04-05 | 西南石油大学 | A method of sodium sulphate salinized soil is improved based on new material |
| CN110195380A (en) * | 2019-05-17 | 2019-09-03 | 中铁二院工程集团有限责任公司 | Consider Ballast track coarse grain salt marsh dirt road embankment structure and construction method that violent temperature influences |
| CN110195380B (en) * | 2019-05-17 | 2023-04-07 | 中铁二院工程集团有限责任公司 | Ballast track coarse-grained saline soil embankment structure considering severe air temperature influence and construction method |
| CN111501454A (en) * | 2020-04-23 | 2020-08-07 | 山东交通学院 | Method for treating soft soil roadbed at bridge head roadbed transition section based on biological enzyme curing material and construction process |
| CN111501455A (en) * | 2020-04-23 | 2020-08-07 | 山东交通学院 | Construction process for reinforcing roadbed by combining biological enzyme curing material with cured powder soil roadbed and compacted sand piles |
| CN113621379A (en) * | 2021-08-12 | 2021-11-09 | 天津建设发展集团有限公司 | Treatment method for subgrade damage |
| CN113621379B (en) * | 2021-08-12 | 2022-04-15 | 天津建设发展集团有限公司 | Treatment method for subgrade damage |
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