CN117326842A - Solidified contaminated soil and method for filling roadbed by using solidified contaminated soil - Google Patents
Solidified contaminated soil and method for filling roadbed by using solidified contaminated soil Download PDFInfo
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- CN117326842A CN117326842A CN202311205487.2A CN202311205487A CN117326842A CN 117326842 A CN117326842 A CN 117326842A CN 202311205487 A CN202311205487 A CN 202311205487A CN 117326842 A CN117326842 A CN 117326842A
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- soil
- solidified
- polluted soil
- roadbed
- mass
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- 239000002689 soil Substances 0.000 title claims abstract description 148
- 238000011049 filling Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002893 slag Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000010881 fly ash Substances 0.000 claims abstract description 13
- 239000002910 solid waste Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract 1
- 230000006378 damage Effects 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0409—Waste from the purification of bauxite, e.g. red mud
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
-
- 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
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to the technical field of waste utilization, in particular to solidified polluted soil and a method for roadbed filling by using the solidified polluted soil, wherein the solidified polluted soil comprises polluted soil, carbide slag, blast furnace slag, fly ash and water, the polluted soil is solid waste, the solid waste is red mud, the mixing amount of the carbide slag is 4-8% of the mass of the polluted soil, the mixing amount of the blast furnace slag is 4-8% of the mass of the polluted soil, the mixing amount of the fly ash is 2-4% of the mass of the polluted soil, and the water is 10-20% of the mass of the polluted soil; the invention uses the red mud to form solidified polluted soil for roadbed filling, and after the waste is reused, not only can the reasonable consumption of the red mud be realized and the pollution be reduced, but also the energy consumption of roadbed filling can be reduced while the intensity of roadbed filling can be effectively ensured, and the problems that the existing red mud is large in accumulation amount and cannot be effectively utilized and the energy consumption of roadbed filling is large are solved.
Description
Technical Field
The invention belongs to the technical field of waste utilization, and particularly relates to a method for solidifying polluted soil and filling roadbed by using the polluted soil.
Background
Red mud is an industrial solid waste discharged when alumina is extracted in the aluminum production industry, and is called red mud because of high iron oxide content and similar appearance to red mud. Due to the different ore grade, production method and technical level, about 1.0-1.8 tons of red mud is discharged per 1 ton of alumina produced.
China is used as a large country for alumina production, and as the stockpiling amount of red mud is larger and the pollution to the environment is more serious, the red mud is utilized to the greatest extent in a recycling way, and the red mud is not slowly utilized.
The filling of the road soil subgrade is an important construction link, and the steps of soil excavation, filling, compaction, trimming and the like are required to be carried out according to the design requirements so as to ensure the firmness and stability of the road subgrade.
The existing roadbed is filled usually in a digging mode, the bottom is directly compacted soil, and the roadbed is extremely easy to damage under the action of flowing water and tree roots, so that the pavement is affected, the pavement is cracked and broken, and the maintenance cost is high.
The roadbed is formed by adopting a cement concrete casting mode, but the cost is high, and the resource consumption is too large.
Therefore, the invention provides the method for filling the roadbed by using the red mud to form the solidified polluted soil, which not only can realize reasonable consumption of the red mud to reduce pollution, but also can effectively ensure the strength of the roadbed filling and simultaneously reduce the energy consumption of the roadbed filling after the waste is reused.
Disclosure of Invention
In order to make up the deficiency of the prior art, improve the intensity of the roadbed and reduce the energy consumption of roadbed filling while realizing the reutilization of waste resources, the invention provides a method for solidifying polluted soil and using the polluted soil to fill the roadbed.
The technical scheme adopted for solving the technical problems is as follows: the solidified contaminated soil comprises contaminated soil, carbide slag, blast furnace slag, fly ash and water.
Preferably, the contaminated soil is solid waste.
Preferably, the solid waste is red mud.
Preferably, the mixing amount of the carbide slag is 4-8% of the mass of the polluted soil, the mixing amount of the blast furnace slag is 4-8% of the mass of the polluted soil, the mixing amount of the fly ash is 2-4% of the mass of the polluted soil, and the mixing amount of the water is 10-20% of the mass of the polluted soil.
Preferably, the mixing amount of the carbide slag is 6% of the mass of the polluted soil, the mixing amount of the blast furnace slag is 6% of the mass of the polluted soil, the mixing amount of the fly ash is 3% of the mass of the polluted soil, and the water is 15% of the mass of the polluted soil.
The roadbed filling method uses the solidified polluted soil for filling, and comprises the following steps:
s1: the solidified polluted soil is used on the roadbed, and a lamination method is used for piling up to form road shoulders on two sides;
s2: paving a geomembrane on the roadbed between the shoulders at two sides;
s3: and a plain soil roadbed is paved above the geomembrane, and the plain soil roadbed is paved in a layered compaction mode, so that the plate solidity is ensured.
S4: paving semi-solidified polluted soil on the compacted plain soil roadbed, wherein the semi-solidified polluted soil is compacted in the paving process by adding water into the solidified polluted soil to ensure that the water content of the solidified polluted soil is 15-30%;
s5: paving solidified contaminated soil above the semi-solidified contaminated soil layer, wherein compaction is required during paving each layer;
s6: and after the solidification polluted soil layer is paved, paving the pavement.
Preferably, the moisture content of the semi-solidified polluted soil after each layer of the soil is laid and compacted is lower than 20%, and the next layer of the soil is laid.
Preferably, the ratio of the longest distance to the shortest distance of the road shoulder on the roadbed is 4:3.
Preferably, the thickness ratio of the geomembrane, the thickness of the basic layer of the plain soil and the thickness of the semi-solidified polluted soil to the thickness of the solidified polluted soil is 250:300:1400:1.
Preferably, the geomembrane thickness is 1mm.
The beneficial effects of the invention are as follows:
1. according to the solidified polluted soil and the method for roadbed filling by using the solidified polluted soil, the red mud and other solid wastes are mixed to form the solidified polluted soil for roadbed filling, and after the wastes are reused, the reasonable consumption of the red mud can be realized, the pollution can be reduced, the strength of roadbed filling can be effectively ensured, and meanwhile, the energy consumption of roadbed filling can be reduced.
2. According to the solidified contaminated soil and the method for filling the roadbed by using the solidified contaminated soil, disclosed by the invention, the roadbed strength is effectively improved by matching with the solidified contaminated soil through improving the roadbed filling method, the influence of water and soil loss and tree root spreading on the roadbed is reduced, and the service life of the road is prolonged.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a construction cross-sectional view of a roadbed filling of the present invention;
fig. 2 is a flow chart of the method of the present invention.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in figures 1-2, the solidified polluted soil comprises polluted soil, carbide slag, blast furnace slag, fly ash and water, the polluted soil, the carbide slag, the blast furnace slag and the fly ash are crushed, then water is added into the crushed polluted soil, and the crushed polluted soil is mixed and dried to form the fixed-line polluted soil, so that the solidified polluted soil has high utilization value, has high rigidity and toughness of more metals, is not easy to damage, and can be manufactured into hard blocks in various forms after being mixed with water, and the solidified polluted soil has wide application range.
As a specific implementation mode of the invention, the polluted soil is solid waste, and the solid waste has higher strength, so that the energy can be saved and the high-strength bearing work can be realized.
As a specific implementation mode of the invention, the solid waste is red mud, the red mud is used as industrial solid waste discharged when alumina is extracted in the aluminum production industry, the yield is high, a large amount of ferric oxide components are contained in the red mud, the hardness is high after the solid waste is prepared into solidified pollutants, the water flow scouring is effectively resisted through the insolubility of the red mud, and the service life is long.
As a specific implementation mode of the invention, the mixing amount of the carbide slag is 4-8% of the mass of the polluted soil, the mixing amount of the blast furnace slag is 4-8% of the mass of the polluted soil, the mixing amount of the fly ash is 2-4% of the mass of the polluted soil, and the mixing amount of the water is 10-20% of the mass of the polluted soil.
As a specific embodiment of the invention, the mixing amount of the carbide slag is 6% of the mass of the polluted soil, the mixing amount of the blast furnace slag is 6% of the mass of the polluted soil, the mixing amount of the fly ash is 3% of the mass of the polluted soil, and the mixing amount of the water is 15% of the mass of the polluted soil. The carbide slag and the blast furnace slag red mud are effectively mixed by the fly ash, and are adhered by the water, so that the whole is effectively formed, and the strength is higher.
The roadbed filling method uses the solidified polluted soil for filling, and comprises the following steps:
s1: the solidified polluted soil is used on the roadbed, road shoulders on two sides are formed by stacking through a lamination method, and the road shoulders are formed by high-strength scouring-resistant of the solidified polluted soil, so that the road surface and the roadbed are effectively protected, and the service life is prolonged;
s2: the geomembrane is paved on the roadbed between the shoulders at the two sides, so that the pollution degree of solidified polluted soil to the bottom soil is reduced, the environment is protected while the reutilization is realized, and the damage to the environment is reduced;
s3: the soil roadbed is paved above the geomembrane, the soil roadbed is paved in a layered compaction mode, the plate solidity is guaranteed, the rapid damage caused by the fact that the geomembrane is directly contacted with the semi-solidified polluted soil is prevented through the soil roadbed, the service life of the geomembrane is prolonged, the protection strength to the environment is guaranteed, meanwhile, the semi-solidified polluted soil and pollutants polluted by a fixed phone are absorbed through the soil roadbed, and the pollution injury to a bottom soil layer is further reduced.
S4: paving semi-solidified polluted soil on the compacted plain soil roadbed, wherein the semi-solidified polluted soil is formed by adding water into the solidified polluted soil to ensure that the water content of the solidified polluted soil is 15-30%, compacting is performed in the paving process, water is extruded into the plain soil roadbed layer in the compacting process, the plain soil roadbed layer is adhered to form a whole, and meanwhile, the water of the semi-solidified polluted soil is absorbed, so that the semi-solidified polluted soil is quickly fixed, and the roadbed strength is effectively improved when the compacting step is matched;
s5: the method comprises the steps of paving solidified contaminated soil above a semi-solidified contaminated soil layer, compacting each layer of the solidified contaminated soil when paving, penetrating water and other substances into a soil foundation layer through the semi-solidified contaminated soil paving process, combining the solid-state contaminated soil with the substances crossing in the semi-solidified contaminated soil contact compacting process, improving the bonding strength of the solidified contaminated soil layer, the semi-solidified contaminated soil layer and the soil foundation layer, improving the strength of the whole roadbed, further improving the service life, and effectively reducing the possibility of plant root system extension due to the strength and the substance characteristics of the solid-state contaminated soil, and further improving the service life of the roadbed;
s6: and after the solidification polluted soil layer is paved, paving the pavement.
As a specific implementation mode of the invention, the moisture content of the semi-solidified polluted soil paved and compacted on each layer in the S4 is lower than 20%, the next layer is paved, the strength of the solidified polluted soil is effectively improved after the moisture content is lower than 20%, the overall density is higher, the settlement amount can be effectively reduced by paving the next layer, and the road surface damage caused by settlement after paving the road surface in the later period is avoided.
As a specific embodiment of the invention, the ratio of the longest distance to the shortest distance of the road shoulder on the roadbed is 4:3.
As a specific implementation mode of the invention, the thickness ratio of the geomembrane, the thickness of the basic layer of the plain soil and the thickness of the semi-solidified polluted soil to the thickness of the solidified polluted soil is 250:300:1400:1, the thickness of the geomembrane, the thickness of the basic layer of the plain soil and the thickness of the semi-solidified polluted soil and the thickness of the solidified polluted soil can cause waste of raw materials, meanwhile, the connection between layers is unstable due to the thickness problem, the stability of the roadbed in the use process is effectively improved through controlling the thickness of each layer, the service life is prolonged, and the resource consumption is saved.
As a specific embodiment of the present invention, the thickness of the geomembrane is 1mm.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a solidification contaminated soil which characterized in that: including contaminated soil, carbide slag, blast furnace slag, fly ash and water.
2. A solidified contaminated soil according to claim 1, wherein: the polluted soil is solid waste.
3. A solidified contaminated soil according to claim 2, wherein: the solid waste is red mud.
4. A solidified contaminated soil according to claim 1, wherein: the mixing amount of the carbide slag is 4-8% of the mass of the polluted soil, the mixing amount of the blast furnace slag is 4-8% of the mass of the polluted soil, the mixing amount of the fly ash is 2-4% of the mass of the polluted soil, and the mixing amount of the water is 10-20% of the mass of the polluted soil.
5. A solidified contaminated soil according to claim 4, wherein: the mixing amount of the carbide slag is 6% of the mass of the polluted soil, the mixing amount of the blast furnace slag is 6% of the mass of the polluted soil, the mixing amount of the fly ash is 3% of the mass of the polluted soil, and the water is 15% of the mass of the polluted soil.
6. A roadbed filling method is characterized in that: filling with the solidified contaminated soil according to any one of the preceding claims 1 to 5, comprising the steps of:
s1: the solidified polluted soil is used on the roadbed, and a lamination method is used for piling up to form road shoulders on two sides;
s2: paving a geomembrane on the roadbed between the shoulders at two sides;
s3: and a plain soil roadbed is paved above the geomembrane, and the plain soil roadbed is paved in a layered compaction mode, so that the plate solidity is ensured.
S4: paving semi-solidified polluted soil on the compacted plain soil roadbed, wherein the semi-solidified polluted soil is compacted in the paving process by adding water into the solidified polluted soil to ensure that the water content of the solidified polluted soil is 15-30%;
s5: paving solidified contaminated soil above the semi-solidified contaminated soil layer, wherein compaction is required during paving each layer;
s6: and after the solidification polluted soil layer is paved, paving the pavement.
7. The subgrade filling method as claimed in claim 6, wherein: and (4) paving the semi-solidified polluted soil in the step (S4), wherein the moisture content of the paved compacted soil in each layer is lower than 20%, and paving the next layer.
8. The subgrade filling method as claimed in claim 7, wherein: the ratio of the longest distance to the shortest distance of the road shoulder on the roadbed is 4:3.
9. The subgrade filling method as claimed in claim 8, wherein: the thickness ratio of the geomembrane, the thickness of the plain soil road base layer and the thickness of the semi-solidified contaminated soil to the thickness of the solidified contaminated soil is 250:300:1400:1.
10. The subgrade filling method as claimed in claim 9, wherein: the thickness of the geomembrane is 1mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311205487.2A CN117326842B (en) | 2023-09-18 | 2023-09-18 | Solidified contaminated soil and method for filling roadbed by using solidified contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311205487.2A CN117326842B (en) | 2023-09-18 | 2023-09-18 | Solidified contaminated soil and method for filling roadbed by using solidified contaminated soil |
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| CN117326842B CN117326842B (en) | 2024-05-03 |
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