CN107671106A - Contaminated soil heterotopic solidifies repairing construction apparatus system and construction method - Google Patents
Contaminated soil heterotopic solidifies repairing construction apparatus system and construction method Download PDFInfo
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- CN107671106A CN107671106A CN201711006195.0A CN201711006195A CN107671106A CN 107671106 A CN107671106 A CN 107671106A CN 201711006195 A CN201711006195 A CN 201711006195A CN 107671106 A CN107671106 A CN 107671106A
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- 238000007711 solidification Methods 0.000 claims abstract description 61
- 230000008023 solidification Effects 0.000 claims abstract description 61
- 238000007906 compression Methods 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 35
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims abstract description 11
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 38
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- 238000012545 processing Methods 0.000 claims description 11
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- 230000000694 effects Effects 0.000 claims description 8
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- 239000004568 cement Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 5
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- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
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- 238000004458 analytical method Methods 0.000 claims description 3
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- 229920000642 polymer Polymers 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 239000012744 reinforcing agent Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 13
- 238000000748 compression moulding Methods 0.000 abstract description 3
- 238000001723 curing Methods 0.000 description 76
- 238000002386 leaching Methods 0.000 description 14
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 10
- 230000006641 stabilisation Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 229910001385 heavy metal Inorganic materials 0.000 description 8
- 239000000395 magnesium oxide Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 238000011105 stabilization Methods 0.000 description 7
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- 229910052793 cadmium Inorganic materials 0.000 description 5
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 5
- 239000000440 bentonite Substances 0.000 description 4
- 229910000278 bentonite Inorganic materials 0.000 description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
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- 238000005067 remediation Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004848 polyfunctional curative Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000013006 addition curing Methods 0.000 description 1
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- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
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- 238000010979 pH adjustment Methods 0.000 description 1
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- 238000006116 polymerization reaction Methods 0.000 description 1
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- 238000011172 small scale experimental method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kind of contaminated soil heterotopic solidification repairing construction apparatus system and construction method, including：Take contaminated soil and be fed through the dry drying of the enterprising sector-style of drying platform for being equipped with impervious element；Sub-sieve is carried out to contaminated soil, the rubbish in contaminated soil separated with soil, and soil is subjected to preliminary crushing；Curing agent is added into the contaminated soil after crushing, is mixed evenly, forms soil/curing agent mixture；Water flood treatment is carried out to soil/curing agent mixture and is mixed evenly；Soil/curing agent mixture after water filling is stirred carries out compression process and forms some pieces of soil solidification blocks；Soil solidification block is conserved under the constant-temperature constant-humidity environment of specified temperature humidity range.The present invention is precisely controlled based on parameters such as high pressure compression molding device, pressure and soil moisture contents, the constructing device that automatic degree is higher and construction method, it can be ensured that the parameter obtained in strict accordance with laboratory implements contaminated soil heterotopic solidification recovery project.
Description
Technical field
The invention belongs to contaminated soil remediation technical field, and in particular to a kind of construction parameter is precisely controlled, automates journey
The higher contaminated soil heterotopic solidification repairing construction apparatus system of degree and construction method.
Background technology
With urbanization and the quickening of industry transfer process, China's urban industry enterprises remove or the contaminated site number left
Measure limiting factor growing day by day, contaminated soil of site has recycled as many big and medium-sized cities Security of Land Resource in China.
The research and practice of ground contamination soil remediation have turned into the important content of China's field of environmental improvement.
Solidification and stabilization has turned into the main technique methods of China's heavy-metal contaminated soil reparation.At present, Hunan, Hubei,
The provinces and cities such as Chongqing, Jiangsu, Zhejiang and Shanghai mainly employ solidification and stabilization technical finesse heavy metal pollution of soil thing.According to not
Statistics completely, the soil solidification stabilisation recovery project case of domestic application is more than 100 at present.
The solidification and stabilization of contaminated soil can be subdivided into curing technology and stabilization technology, and both have different contain
Justice.Contaminated soil curing technology mainly by by pollutant sealing structural integrity solid product (firming body/cured block)
In, isolate contacting for contaminated soil and external environment, so as to reach the purpose of control soil pollutant migration；Stabilization technology will
Soil pollutant be converted into not readily dissolve, form that transfer ability or toxicity are smaller realizes that its is innoxious, reduce to ecosystem
The risk for harmfulness of uniting.According to statistics, for the contaminated soil solidification and stabilization technology in China based on stabilizing, its ratio accounts for 90%
More than.The research and engineering application of curing technology are relatively fewer.
Usually require to carry out recycling after contaminated soil curing process, to carry out final disposal to soil after processing.
One of recycling approach is using the soil (i.e. soil solidification body/cured block) after solidification as roadbed or less demanding built
Build material, thus to pay close attention to the physical properties such as the compression strength of soil solidification body, impact resistance, anti-immersion property and freeze-thaw resistance with
And the chemical index such as pollutant Leaching.The purpose of correlative study and recovery project is to obtain that compression strength is bigger, shock resistance
Property and anti-immersion property and freezing and thawing performance is more excellent, pollutant leaching concentration is lower soil solidification block.
In current contaminated soil curing technology research, the leaching effect of compression strength and pollutant is that two classes are most attached most importance to
The evaluation index, to be most widely used.It is good related that research finds that soil solidification block compression strength and other indexs have
Property, therefore the leading indicator generally using compression strength as soil pollutant curing degree, its intensity are higher, are more advantageous to weaken
The mobility of pollutant.
Porous is the deadly defect of soil solidification block, and larger porosity easily forms cavernous structure communicating together, so as to
So that compression strength and anti-improving soaking are bad, promote the leaching of polluter.Many kinds of measures can improve soil solidification block
Loose structure, but under conditions of the fixation of the parameters such as curing agent component, curing agent and moisture content, extrusion forming is external force compacting
As mode the simplest, the most economic.External force compacting can discharge air between soil particle, shorten between soil particle
Gap, reduce cured block porosity, increase its density, so as to improve its compression strength.At present, domestic contaminated soil solidification is repaired
Engineering is less, and more using shake table combination manual compaction by the way of, smaller due to being compacted dynamics, is unable to reach higher initial
Pressure and soil squeezing effect, cause the compression strength of soil solidification block to be a greater impact, and have a strong impact on that recovery project is implemented
Effect.
The mercury contaminated soil that patent " a kind of mercury contaminated soil solidification and stabilization method " (201510294302.9) provides
Curing, mainly include villaumite addition process, pH adjustment process, mixed processes, addition activator process, digestion shaping work
Sequence, break process process.This method spontaneously dries after simply simply adding reparation medicament into contaminated soil, produces certain strong
Degree, afterwards to complete digestion shaping after product carry out Temperature fall, destroyed afterwards, the soil after destruction backfilled or
For other purposes.It can be seen that the flow does not form more regular soil solidification body, pressing technology, therefore institute are not also used
The formed body intensity of formation is extremely weak, it is impossible to is directly applied as firming body.
Patent " heavy-metal contaminated soil reparation curing agent, heavy-metal contaminated soil restorative procedure "
(201210383318.3) mainly using sulphate aluminium cement as curing agent, its curing is also simply to contaminated soil
Middle addition curing agent, mix, spray water in mixed process.Calcium sulphoaluminate in sulphate aluminium cement reacts to form single sulfur type with water
Calcium hydroaluminosulfate, heavy metal carry out the restructuring of chemical bond with wherein atom, and metallic atom is spatially bound in lattice
And it is not easy to separate out.The purpose of curing heavy metal is thus reached.It can thus be seen that visible, the flow is not formed more
Regular soil solidification body, does not also use pressing technology, and is solidified by chemical bond heavy metal, thus with this patent
The constructing device system and construction method based on high pressure compression molding device have larger difference.
To sum up, it is necessary to which invention is a kind of precisely to be controlled based on parameters such as high pressure compression molding device, pressure and soil moisture contents
The higher contaminated soil heterotopic solidification repairing construction apparatus system of system, automatic degree and construction method, to ensure in strict accordance with reality
The parameter for testing room acquisition implements contaminated soil heterotopic solidification recovery project.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind based on high pressure compacting
The contaminated soil heterotopic solidification reparation that the parameters such as former, pressure and soil moisture content are precisely controlled, automatic degree is higher is applied
Work apparatus system and its construction method, concrete technical scheme are：
A kind of contaminated soil heterotopic solidifies method for repairing and constructing, comprises the following steps：
Step S1, take contaminated soil, and be fed through the dry drying of the enterprising sector-style of drying platform for being equipped with impervious element；
Step S2, sub-sieve is carried out to contaminated soil, the rubbish in contaminated soil is separated with soil, and by soil
Earth carries out preliminary crushing；
Step S3, curing agent is added into the contaminated soil after crushing, be mixed evenly, formed soil/curing agent and mix
Compound；
Step S4, water flood treatment is carried out to soil/curing agent mixture and is mixed evenly；
Step S5, soil/curing agent mixture after water filling is stirred carries out compression process and forms some pieces of soil solidifications
Block；
Step S6, soil solidification block is conserved under the constant-temperature constant-humidity environment of specified temperature humidity range.
Further, in step S3, before the step of adding curing agent, in addition to：Contaminated soil after crushing is carried out
Sample and be sent into laboratory lab scale, determine the stablizing effect of different curing agent species and addition to soil pollutant, and not
With the influence of curing agent species and addition to cured block compression strength, optimal curing agent species and optimal curing agent are filtered out
Addition.
Further, the weight of the curing agent of addition and soil ratio is 1:10~5:10, can be before increase-volume ratio be controlled
Put and obtain higher cured block compactness and compression strength, and relatively low pollutant leaching concentration, the curing agent include
Cement base soil-solidified-agent, lime base soil-solidified-agent, magnesium oxide-based soil-solidified-agent, slag firming agent for soil, ionic species
Curing agent, high molecular polymer firming agent for soil, and Compositional type soil-solidified-agent.It is further preferred that the curing agent
Including portland cement, bentonite, magnesia compounding soil-solidified-agent, and weight ratio is 7:1:2, bentonite and magnesia aquation
Product can fill up the pore of portland cement firming body, so as to improve firming body compactness and compression strength, reduce pollution
Thing leaching concentration.
Further, in step S4, after water flood treatment, the weight ratio of water and soil/curing agent mixture is 1:3~1:
1, it can both meet silicate cement hydration, moisture needed for magnesia hydration process, and can prevent excess moisture from causing to solidify body opening again
Gap increases, and is advantageous to firming body compactness and compression strength is formed.
Further, in step S5, the soil after water filling/curing agent mixture is sent into non-baking brick machine and carries out compression process
Some soil solidification blocks are formed, afterwards each soil solidification block are stacked to form soil solidification block product pile；Suppressed
During processing, the pressure limit of compacting is 15MPa~50Mpa, and vibration frequency is 3000~4500 beats/min, can both ensure that soil obtained
Enough to pressure and pressure, can prevent again to non-baking brick machine cause damage and unnecessary energy resource consumption.
Further, in step S6, each soil solidification block of soil solidification block product pile is transferred to constant temperature and humidity
Care environments are conserved, and reach carry out an acceptance inspection after default curing time sampling and analysis detection；Soil solidification block is in humidity
For 50%~95% and temperature be 5 DEG C~60 DEG C in the environment of conserve, can both ensure that water fully occurs for portland cement, magnesia
Change reaction, destruction of the adverse environment condition to firming body compactness and compression strength in hydration process can be prevented again.
Present invention also offers a kind of contaminated soil heterotopic simultaneously to solidify repairing construction apparatus system, including：
Delivery unit is excavated, the excavation delivery unit is used to excavate contaminated soil and export by delivery unit；
Dewatering unit is air-dried, the air-dried dewatering unit is used to receive the contaminated soil for excavating delivery unit output, and right
Contaminated soil carries out air-drying drying；
Sub-sieve unit, the sub-sieve unit is used for the contaminated soil progress sub-sieve after air-drying and drying, by dirt
While rubbish and soil in dye soil are separated, preliminary crushing processing is carried out to soil；
Curing agent adding device, for adding appropriate quantitative curing agent into the contaminated soil after crushing, mix
Uniformly, soil/curing agent mixture is formed；
Water injection unit, the water injection unit are used to carry out quantitative injection processing to soil/curing agent mixture and mix to stir
Mix uniformly；
Press unit, the press unit are used for soil/curing agent mixture after water filling is stirred and carry out compression process,
Form some pieces of soil solidification blocks；
Unit is conserved, the maintenance unit is used for soil solidification block under the constant-temperature constant-humidity environment of specified temperature humidity range
Conserved.
Further, water injection unit mixes including water tank, constant displacement pump/measuring pump, aqueduct, shower nozzle and soil/water
Equipment is closed, water tank stores water, and the water inlet of constant displacement pump/measuring pump is connected with water tank, and outlet passes through aqueduct and spray
Head connection, shower nozzle are connected with soil/water mixing apparatus.
Further, press unit includes non-baking brick machine, and the non-baking brick machine has charging aperture, hopper, supporting plate, enters plate automatically
Device, supporting plate conveyer, compressing module and automatic plate superposing device.
Further, conserving unit includes maintenance platform, stacking module and temperature and humidity control module, if the stacking module will
Dry ground earth cured block rule be stacked in maintenance platform on, and by temperature and humidity control module by it is described maintenance platform maintain it is specified warm and humid
Spend under the constant-temperature constant-humidity environment of scope.
Compared with prior art, contaminated soil heterotopic solidification repairing construction apparatus system provided by the invention and construction method
With advantages below：
1st, quantitatively add control module by the medicament of integral type soil processing machine and be precisely controlled adding for curing agent in soil
Add ratio, amount of water and soil/curing agent mixture material moisture content are precisely controlled by constant displacement pump, by the compacting of non-baking brick machine
Forming module is precisely controlled compound stalk forming pressure, and the relevant parameter that can be obtained in strict accordance with laboratory implements field pilot test experiment
And extensive recovery project construction；
2nd, elevated pressures are applied to soil during compound stalk forming, is stabilisation and the firming body resistance to compression of soil pollutant
The formation of intensity provides good condition；The purpose saved hardener dose, cut down engineering cost may finally be reached；
3rd, the construction method realize the mechanization of main process such as material mixing, material transferring, compressing and
It is semi-automatic.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is that a kind of contaminated soil heterotopic provided by the invention solidifies showing for repairing construction apparatus system and its construction method
It is intended to.
Embodiment
In the following description, a large amount of concrete details are given to provide more thorough understanding of the invention.So
And it is obvious to the skilled person that the present invention can be able to without one or more of these details
Implement.In other examples, in order to avoid obscuring with the present invention, do not enter for some technical characteristics well known in the art
Row description.
In order to thoroughly understand the present invention, detailed step and detailed structure will be proposed in following description, so as to
Explain technical scheme.Presently preferred embodiments of the present invention is described in detail as follows, but in addition to these detailed descriptions, this
Invention can also have other embodiment.
Embodiment one
The invention provides a kind of contaminated soil heterotopic solidification repairing construction apparatus system and its method for construction, reference picture
Shown in 1, specifically comprise the following steps：
Step S1, the determination that contaminated soil excavates scope is carried out first, and the excavation of contaminated soil is subsequently carried out with this scope.
Step S2, usage mining delivery unit takes contaminated soil and is fed through soil transport equipment, is transported afterwards by soil
Transfer device is delivered to the reparation that repair area carries out soil.Wherein, soil excavate delivery unit include soil excavating equipment and
Contaminated soil is dug out and is loaded into soil transport equipment by soil transport equipment, soil excavating equipment, and soil transport equipment is by dirt
Soil transport is contaminated to repair area.In a specific embodiment, we can use little Song PC200-8M0 type hydraulic excavatings
Machine by soil excavate in the range of contaminated soil dig out, be loaded into east wind DFH3250A type dumpers, short transportation by lighter is transported to reparation and made
Industry area.
Step S3, the contaminated soil of excavation is sent into air-dried dewatering unit and carries out air-drying dehydration by soil transport equipment.Wherein,
Air-drying dewatering unit includes soil drying platform, impervious element and rain-proof facility；Soil dries platform and is used to hold contaminated soil
To be air-dried and be dried, impervious element is laid on soil and dried on platform, and the impervious element includes HDPE antiseepage films and paving
The antiseepage film protection equipment being located above and below HDPE antiseepage films；Rain-proof facility is covered in soil and dries the dirt held on platform
Contaminate on soil.By soil during soil dries the dry drying of the enterprising sector-style of platform, dried to drying in soil on platform
Soil is managed and safeguarded, can stir if necessary, covers rain-proof facility on mound when rainy weather.
Step S4, the progress sub-sieve of sub-sieve unit is admitted to through air-drying the contaminated soil of dewater treatment, by Polluted Soil
Rubbish in earth is separated with soil, soil has been carried out while sub-sieve preliminary broken, is remained in soil and is broken
Building waste on broken bucket is individually stacked.Wherein, sub-sieve unit is that the sieve with soil breaking bucket is disembarked, and sieve is disembarked Polluted Soil
Rubbish in earth is separated with soil, and the impurities outlet that the rubbish screened out is disembarked from sieve is discharged；In the process, soil
Tentatively crushed.Sieve in the present invention is disembarked as the soil breaking bucket with impurity screening function, soil impurity screening bucket or shaken
Dynamic sieve.In a specific embodiment, we can use ALLU DH3-17 type soil breaking buckets to the building in contaminated soil
Rubbish is screened out at least 1 time, and soil is carried out tentatively broken.
Step S5, added using curing agent adding device in soil of the curing agent to after crushing.We are to Polluted Soil first
Earth is sampled, and carries out laboratory small-scale experiment, to determine different curing agent species and addition to the steady of soil pollutant
Determine effect, and the influence of different curing agent species and addition to cured block compression strength, filter out optimal curing agent kind
Class and optimal addition, and appropriate quantitative curing agent is added to the dosing mouth of integral type curing agent addition processor；Afterwards I
Usage mining machine will be preliminary broken after soil be put into integral type curing agent addition processing machine inlet, curing agent addition equipment
Add curing agent into soil, add during curing agent or mixed after the completion of addition, so that soil and curing agent
It is thoroughly mixed to form soil/curing agent mixture.Wherein, selected curing agent includes cement base soil-solidified-agent, lime base
Soil-solidified-agent, magnesium oxide-based soil-solidified-agent, slag firming agent for soil, ionic species curing agent, high molecular polymerization species soil
Earth curing agent, and Compositional type soil-solidified-agent, and the curing agent and the weight ratio of soil added is 1:10.It is specific real one
Apply in example, we can use Kang Heng KH200 type integral type soil processing machines to be stirred mixed processing to soil and curing agent.
Step S6, soil/curing agent mixture is sent into water filling list using the first soil delivery unit (such as conveyer belt)
Member carries out water filling.Water injection unit includes water tank, constant displacement pump/measuring pump, aqueduct, shower nozzle and soil/water mixing apparatus,
Water tank stores water, and the water inlet of constant displacement pump/measuring pump is connected with water tank, and outlet is connected by aqueduct with shower nozzle,
Shower nozzle is connected with soil/water mixing apparatus.The step of water injection unit water filling, is as follows：Constant displacement pump/measuring pump produces power, extracts storage
Water in water pot is simultaneously mixed soil/curing agent that quantitative water is injected into soil/water mixing apparatus by aqueduct, shower nozzle
Compound, the water of injection is set to reach preset value 1 with the weight ratio of soil/curing agent:3.In a specific embodiment, we use
As if pump industry A2F160 types plunger piston fixed displacement pump extracts the water in water tank in, by shower nozzle in the twin-shaft mixer into work
Soil adds water；Soil/curing agent mixture is sent to prestige Austria JS500 types by grace space ENYU-B-10 type belt conveyors and forced
Formula double-horizontal axle concrete-mixer (i.e. water injection unit) carries out water flood treatment.
Step S7, soil/curing agent mixture after water filling is sent using the second soil delivery unit (such as conveyer belt)
Enter press unit, the soil after water filling/curing agent mixture is carried out into compression process forms some pieces of soil solidification blocks.Its
In, press unit includes non-baking brick machine, and the non-baking brick machine has charging aperture, hopper, supporting plate, enters panel assembly, supporting plate transmission automatically
Device, compressing module and automatic plate superposing device.Press unit, which suppresses the step of forming soil solidification block, to be included：Water flood treatment
Soil/curing agent mixture afterwards enters in material bin to store by charging aperture, and soil/curing agent mixture material is delivered to by hopper
In compressing module it is compressing after be stripped, enter panel assembly automatically and deliver to supporting plate below compressing module, shaping it is each
Soil solidification block finished product is loaded on supporting plate is delivered to automatic lamination module by supporting plate delivery module, will be each by automatic lamination module
Soil solidification block finished product is stacked to form soil solidification block product pile.Wherein, compressing module is in pressing process, pressure
Power scope is 15MPa, and vibration frequency is 3000 beats/min.
Step S8, soil solidification block is shifted using cured block short delivery unit of refuting, by soil solidification block from pressure
Unit processed is sent into maintenance unit, and soil solidification block is conserved under the constant-temperature constant-humidity environment of specified temperature humidity range.Wherein,
Conserving unit includes maintenance platform, stacking module, temperature and humidity control module.Wherein, conserve on platform and be equipped with impervious element, soil
Cured block is stacked on maintenance platform by stacking rule module, and controls the soil solidification block to be in humidity by temperature and humidity control module
50%~95% and temperature be to conserve in the environment of 5 DEG C~60 DEG C of constant temperature and humidity.In a specific embodiment, maintenance is flat
For platform in long 50 meters, wide 21 meters, high 8 meters of factory building, ground pours 50cm with reinforced concrete.Stacking machine is pre- from Shanghai China
The stacking machine of Harmann Berstorff, Maschinenbau GmbH's production, the soil solidification block product pile of formation by Hangzhou fork truck company A35 type forklift transports
Conserved to the cured block for having laid impervious element on platform, and from the global building instrument and equipment factory production in Hebei Xian County
The FHBS-150 wet machines of type full-automatic temperature-controlling control are controlled to the humiture for conserving platform.
Step S9, carried out an acceptance inspection sampling by Acceptance Monitoring unit after conserving a period of time, according to pollutant Steep cencentration,
Cured block compression strength is checked and accepted, and is disposed on request after qualified.
In the application of reality, the present invention with regard to water after the weight ratio of curing agent species, curing agent and soil, water flood treatment with
The weight of soil/curing agent than, compacting formed soil solidification block pressure limit and vibration frequency range there may be a variety of choosings
Select, several more typical embodiments are set forth below and illustrate.
Embodiment two
The present embodiment is identical with the construction method of embodiment one, and difference is：Curing agent in step S5 specifically includes silicon
Acid salt cement, bentonite, magnesia compounding soil-solidified-agent, and the weight ratio of three is 7:1:2.Firming body analyzes test result
It has been shown that, the leaching concentration of cadmium, arsenic and lead is below the Leaching target that the project recovery technique scheme is formulated in leachate
Value, reaches acceptance criteria；The compression strength average value of cured block is 2.3MPa, and compression strength monolithic minimum value is 2.1MPa, slightly
(2.0MPa) is required higher than the cured block compression strength that the project recovery technique scheme is formulated.
Embodiment three
The present embodiment is identical with the construction method of embodiment one, and difference is：The curing agent and soil added in step S5
Weight ratio be 5:10.The water in soil/curing agent mixture in step S6 after water flood treatment mixes with soil/curing agent
The weight ratio of thing is 1:1.In step S7 when carrying out compression process, compressing module suppresses the pressure to form soil solidification block
For 50MPa, and vibration frequency is 4500 beats/min.Firming body is analyzed test result and shown, the leaching of cadmium, arsenic and lead in leachate
Concentration is below its detection limit, the Leaching desired value formulated well below the project recovery technique scheme, reaches examination
Standard；And the compression strength average value of cured block is 10.5MPa, compression strength monolithic minimum value is 9.6MPa, is significantly larger than
The cured block compression strength that the project recovery technique scheme is formulated requires (2.0MPa).
Example IV
The present embodiment is identical with the construction method of embodiment one, and difference is：Curing agent in step S5 includes silicate
Cement, bentonite and magnesia compounding soil-solidified-agent, three's weight ratio are 7:1:2, and the curing agent and soil added
Weight ratio is 3:10.The water and soil/curing agent mixture in soil/curing agent mixture in step S6 after water flood treatment
Weight ratio be 2:3.In step S7 when carrying out compression process, compressing module, which is suppressed, to be formed the pressure of soil solidification block and is
30MPa, and vibration frequency is 4000 beats/min.
After soil remediation technique provided by the present invention is completed, it is sent into after maintenance platform conserves 28 days by Acceptance Monitoring list
Position carries out an acceptance inspection sampling, Acceptance Monitoring unit reference《Solid waste Leaching leaching method-sulfonitric method》(HJ/T
299-2007) the soil solidification block after crushing is extracted, analysis detection is carried out to the concentration of cadmium, arsenic and lead in leachate,
Reference《Concrete segment and brick test method》(GB/T 4111-2013) is tested cured block compression strength.
In the present embodiment, soil pollutant is heavy metal, and species and detectable concentration are respectively：Cadmium 43.61mg/kg,
Arsenic 130mg/kg, lead 2050mg/kg.
After being carried out an acceptance inspection after being constructed using the parameters of the present invention to cured block, check and acceptance result table that we draw
Bright, compared in more foregoing several embodiments, embodiment provided by the present invention is optimal one embodiment：Cadmium in leachate,
The leaching concentration of arsenic and lead is below its detection limit, the Leaching target formulated well below the project recovery technique scheme
Value, reaches acceptance criteria；And the compression strength average value of cured block is 10.1MPa, compression strength monolithic minimum value is 8.8MPa,
It is significantly larger than the cured block compression strength that the project recovery technique scheme is formulated and requires (2.0MPa).Although the present embodiment with
Embodiment three is compared, and treatment effect is close, but curing agent adds and its thus caused increase-volume efficiency is smaller, and project cost is low,
Therefore the present embodiment belongs to optimal embodiment.
Compared with prior art, contaminated soil heterotopic solidification repairing construction apparatus system provided by the invention and construction method
With advantages below：
1st, quantitatively add control module by the medicament of integral type soil processing machine and be precisely controlled adding for curing agent in soil
Add ratio, amount of water and soil/curing agent mixture material moisture content are precisely controlled by constant displacement pump, by the compacting of non-baking brick machine
Forming module is precisely controlled compound stalk forming pressure, can in strict accordance with laboratory obtain relevant parameter implement field pilot test test and
Extensive recovery project construction；
2nd, elevated pressures are applied to soil during compound stalk forming, is stabilisation and the firming body resistance to compression of soil pollutant
The formation of intensity provides good condition；The purpose saved hardener dose, cut down engineering cost may finally be reached；
3rd, the construction method realize the mechanization of main process such as material mixing, material transferring, compressing and
It is semi-automatic.
Presently preferred embodiments of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as giving reality with the common mode in this area
Apply；Any those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the disclosure above
Methods and technical content many possible changes and modifications are made to technical solution of the present invention, or be revised as equivalent variations etc.
Embodiment is imitated, this has no effect on the substantive content of the present invention.Therefore, every content without departing from technical solution of the present invention, foundation
The technical spirit of the present invention still falls within the present invention to any simple modifications, equivalents, and modifications made for any of the above embodiments
In the range of technical scheme protection.
Claims (10)
1. a kind of contaminated soil heterotopic solidifies method for repairing and constructing, it is characterised in that comprises the following steps：
Step S1, take contaminated soil, and be fed through the dry drying of the enterprising sector-style of drying platform for being equipped with impervious element；
Step S2, sub-sieve is carried out to contaminated soil, the rubbish in contaminated soil separated with soil, and soil is entered
Row preliminary crushing；
Step S3, curing agent is added into the contaminated soil after crushing, be mixed evenly, form soil/curing agent mixture；
Step S4, water flood treatment is carried out to soil/curing agent mixture and is mixed evenly；
Step S5, soil/curing agent mixture after water filling is stirred carries out compression process and forms some pieces of soil solidification blocks；
Step S6, soil solidification block is conserved under the constant-temperature constant-humidity environment of specified temperature humidity range.
2. contaminated soil heterotopic as claimed in claim 1 solidifies method for repairing and constructing, it is characterised in that in step S3, is adding
Before the step of reinforcing agent, in addition to：Contaminated soil after crushing is sampled and is sent into laboratory lab scale, it is determined that different solid
Agent species and addition are to the stablizing effect of soil pollutant, and different curing agent species and addition are to cured block resistance to compression
The influence of intensity, filter out optimal curing agent species and optimal curing agent addition.
3. contaminated soil heterotopic as claimed in claim 1 solidifies method for repairing and constructing, it is characterised in that the curing agent of addition with
The weight ratio of soil is 1:10~5:10, the curing agent includes cement base soil-solidified-agent, lime base soil-solidified-agent, oxidation
Magnesium-based soil-solidified-agent, slag firming agent for soil, ionic species curing agent, high molecular polymer firming agent for soil, Yi Jifu
Distribution type soil-solidified-agent.
4. contaminated soil heterotopic as claimed in claim 1 solidifies method for repairing and constructing, it is characterised in that in step S4, through note
After water process, the weight ratio of water and soil/curing agent mixture is 1:3~1:1.
5. contaminated soil heterotopic as claimed in claim 1 solidifies method for repairing and constructing, it is characterised in that in step S5, will note
Soil/curing agent mixture after water is sent into non-baking brick machine progress compression process and forms some soil solidification blocks, afterwards by each soil
Earth cured block is stacked to form soil solidification block product pile；
When carrying out compression process, the pressure limit of compacting is 15MPa~50Mpa, and vibration frequency is 3000~4500 beats/min.
6. contaminated soil heterotopic as claimed in claim 5 solidifies method for repairing and constructing, it is characterised in that in step S6, by soil
The care environments that each soil solidification block of earth cured block product pile is transferred to constant temperature and humidity are conserved, and reach default maintenance
Carry out an acceptance inspection sampling and analysis detection after time；
Soil solidification block conserves in the environment of humidity is 50%~95% and temperature is 5 DEG C~60 DEG C.
7. a kind of contaminated soil heterotopic solidifies repairing construction apparatus system, it is characterised in that including：
Delivery unit is excavated, the excavation delivery unit is used to excavate contaminated soil and export by delivery unit；
Dewatering unit is air-dried, the air-dried dewatering unit is used to receive the contaminated soil for excavating delivery unit output, and to pollution
Soil carries out air-drying drying；
Sub-sieve unit, the sub-sieve unit is used for the contaminated soil progress sub-sieve after air-drying and drying, by Polluted Soil
While rubbish and soil in earth are separated, preliminary crushing processing is carried out to soil；
Curing agent adding device, for adding appropriate quantitative curing agent into the contaminated soil after crushing, it is mixed evenly,
Form soil/curing agent mixture；
Water injection unit, the water injection unit are used to carry out soil/curing agent mixture quantitative injection processing and mixed equal
It is even；
Press unit, the press unit are used for soil/curing agent mixture after water filling is stirred and carry out compression process, formed
Some pieces of soil solidification blocks；
Unit is conserved, the maintenance unit is used to carry out soil solidification block under the constant-temperature constant-humidity environment of specified temperature humidity range
Maintenance.
8. contaminated soil heterotopic as claimed in claim 7 solidifies repairing construction apparatus system, it is characterised in that water injection unit bag
Water tank, constant displacement pump/measuring pump, aqueduct, shower nozzle and soil/water mixing apparatus are included, water tank stores water, quantitative
The water inlet of pump/measuring pump is connected with water tank, and outlet is connected by aqueduct with shower nozzle, and shower nozzle is mixed with soil/water and set
Standby connection.
9. contaminated soil heterotopic as claimed in claim 7 solidifies repairing construction apparatus system, it is characterised in that press unit bag
Non-baking brick machine is included, the non-baking brick machine has charging aperture, hopper, supporting plate, enters panel assembly automatically, be supporting plate conveyer, compressing
Module and automatic plate superposing device.
10. contaminated soil heterotopic as claimed in claim 7 solidifies repairing construction apparatus system, it is characterised in that maintenance unit
Some soil solidification slip gauges are then stacked in foster including maintenance platform, stacking module and temperature and humidity control module, the stacking module
Protect on platform, and maintained the maintenance platform under the constant-temperature constant-humidity environment of specified temperature humidity range by temperature and humidity control module.
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| CN108225868A (en) * | 2018-03-05 | 2018-06-29 | 王健 | Highway engineering subgrade produces jointly instrument with filling's dry density measure standard soil sample |
| CN108643265A (en) * | 2018-06-21 | 2018-10-12 | 大庆佳泥科技有限公司 | A kind of hardening soil Multifunctional trench water channel molding machine |
| CN109304359A (en) * | 2018-08-13 | 2019-02-05 | 江苏安识环境科技有限公司 | A kind of system and method that dystopy solidification and stabilization repairs contaminated site |
| CN109807171A (en) * | 2019-03-28 | 2019-05-28 | 长沙埃比林环保科技有限公司 | A kind of method of soil remediation |
| CN110593036A (en) * | 2019-09-20 | 2019-12-20 | 上海市政工程设计研究总院（集团）有限公司 | Method for preparing roadbed filler by utilizing high-water-content engineering waste soil |
| CN111825425A (en) * | 2020-07-07 | 2020-10-27 | 广州市第一市政工程有限公司 | Method and equipment for repairing and safely utilizing organic contaminated soil |
| CN113941266A (en) * | 2020-12-22 | 2022-01-18 | 中山大学 | Small-size integrated device of appointed moisture content of preparation and soil additive content soil sample |
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| CN108225868B (en) * | 2018-03-05 | 2023-12-08 | 王健 | Standard soil sample combined making instrument for dry density measurement of soil for highway engineering roadbed |
| CN108643265A (en) * | 2018-06-21 | 2018-10-12 | 大庆佳泥科技有限公司 | A kind of hardening soil Multifunctional trench water channel molding machine |
| CN108643265B (en) * | 2018-06-21 | 2024-04-12 | 王寿光 | Multifunctional ditching ditch forming machine for hardened soil |
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| CN110593036A (en) * | 2019-09-20 | 2019-12-20 | 上海市政工程设计研究总院（集团）有限公司 | Method for preparing roadbed filler by utilizing high-water-content engineering waste soil |
| CN111825425A (en) * | 2020-07-07 | 2020-10-27 | 广州市第一市政工程有限公司 | Method and equipment for repairing and safely utilizing organic contaminated soil |
| CN113941266A (en) * | 2020-12-22 | 2022-01-18 | 中山大学 | Small-size integrated device of appointed moisture content of preparation and soil additive content soil sample |
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