CN107698225A - A kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand and preparation method thereof - Google Patents
A kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand and preparation method thereof Download PDFInfo
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- CN107698225A CN107698225A CN201710941101.2A CN201710941101A CN107698225A CN 107698225 A CN107698225 A CN 107698225A CN 201710941101 A CN201710941101 A CN 201710941101A CN 107698225 A CN107698225 A CN 107698225A
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- plastic limit
- sand
- lime
- low plastic
- speed railway
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- 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
- C04B28/18—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 mixtures of the silica-lime type
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
- C04B16/0633—Polypropylene
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Railway Tracks (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand.The Subgrade Filled Soil in High Speed Railway that the present invention is prepared can not only improve the saturation unconfined compressive strength and ductility, the permeability and compressibility and fragility that reduce low plastic limit silt of the low plastic limit silt containing sand, be advantageous to the utilization of solid refuse simultaneously, it can be used for high-speed railway, inter-city passenger rail roadbed filling containing the low plastic limit silt of sand after improvement, help to reduce high speed railway construction cost.Specifically, according to gross weight meter, each component and proportioning are respectively：Lime 4% 5%, flyash 21% 27%, polypropylene fibre 2 ‰ 4 ‰, the fibre length of the polypropylene fibre is 1 5cm, and remaining is containing the low plastic limit silt of sand.
Description
Technical field
The invention belongs to Subgrade Filled Soil in High Speed Railway technical field, and in particular to a kind of height of the low plastic limit silt improvement containing sand
Fast Subgrade Packing and preparation method thereof.
Background technology
High-speed railway is in China's fast development, broadly, train with design start 250 kilometers/hour (containing reserved) and with
Upper motor train unit train, passenger dedicated railway line system of the overall trip speed not less than 200 kilometers/hour at initial stage are referred to as high-speed railway,
It compared with ordinary train speed faster, while requires train high speed, safety, even running, it is desirable to which its rail level should have higher put down
Pliable, therefore, for high-speed railway to being supported under train high speed driving conditions, it proposes higher requirement to Subgrade Packing,
There must be enough strength and stiffness, and it is longitudinally varying uniform, it is permanent stable.
It was found from existing research material, the stressing conditions of roadbed are sufficiently complex under high-speed railway track, and protrusion needs to solve
, there are two aspects certainly the problem of：One is the intensity fatigue unstability of subgrade soils, including bedding and the dynamic stress size transmitted downwards
With the deformation of subgrade soils；The second is the deformation fatigue unstability of sub-rail foundation, include the ballast bed vibration acceleration and base of instantaneous shock
Facial disfigurement.Also therefore, in the selection of high-speed railway subgrade material, it is desirable to which roadbed material is more from the grading for having strict grading requirement
Sand gravel and graded broken stone, based on A, B group filler or conditioned soil, but this method has clearly a need for the money such as more manpower and materials funds
Source.
Silt belongs to fine grained soil, and not only widely distributed in the whole nation, silt also spreads all over the multiple areas in Shandong Province, and it is total to account for the whole province
The 34% of area, this kind of soil have the characteristics that weak plasticity, low cohesiveness, polymolecularity, rainfall infiltration, capillary water rise and
Under the influence of gutter ponding, subgrade soils water suction softening, mechanical property decay may be caused, this soil body grading is poor, soil strength root
Originally the code requirement of roadbed filling can not be met, therefore can not be directly as Subgrade Filled Soil in High Speed Railway.
However, because silt is widely distributed, especially for the relative area lacked of the high quality fillers such as sandstone, if can lead to
Cross improvement rationally can certainly will effectively reduce the construction cost of high-speed railway by the use of silt as roadbed filling.At present, it is understanding
Certainly silt above mentioned problem, it is added frequently with curing agent etc..Conventional curing agent has the industrial raws such as cement, lime, slag
Material or dead meal, although the mineralogical composition of the soil body can be changed, improve the intensity and durability of the soil body, the soil after improvement
Body often shows certain Brittleness, and larger to soil structures stability influence.
The content of the invention
For above-mentioned the deficiencies in the prior art, inventor is through long-term technology and practical exploration, there is provided a kind of low modeling containing sand
Limit the Subgrade Filled Soil in High Speed Railway of silt improvement.The Subgrade Filled Soil in High Speed Railway that the present invention is prepared can not only be improved containing sand
The saturation unconfined compressive strength and ductility of low plastic limit silt, the permeability and compressibility and fragility for reducing low plastic limit silt,
Be advantageous to the utilization of solid refuse simultaneously, can be used for high-speed railway, inter-city passenger rail road containing the low plastic limit silt of sand after improvement
Based filler, help to reduce high speed railway construction cost.
Specifically, the present invention relates to following technical scheme：
The first aspect of the invention, there is provided a kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand, press
According to gross weight meter, each component and proportioning are respectively：Lime 4%-5%, flyash 21%-27%, polypropylene fibre 2 ‰ -4 ‰,
The fibre length of the polypropylene fibre is 1-5cm, and remaining is containing the low plastic limit silt of sand；
Preferably, the roadbed embankment material is according to gross weight meter, each composition and ratio：Lime is 5%, and flyash is
25%, polypropylene fibre is 4 ‰, and the polypropylene fibre length is 3cm, and remaining is containing the low plastic limit silt of sand；
Preferably, the fiber is polypropylene fibre, fibre fineness 300D (danier).
Preferably, the calcareous quick lime (CL85) that the lime is CaO and content of MgO is >=85%.
Preferably, the flyash is II grade, and loss on ignition is not more than 8%.
Preferably, the liquid limit of the low plastic limit silt containing sand<40%, 30%<Coarse fraction≤50%, gravel grain group content≤
Sand grains group content；
The present invention to containing reasonable in the low plastic limit silt of sand by adding lime, flyash and polypropylene fibre, so as to greatly
Improve the saturation unconfined compressive strength and ductility of the low plastic limit silt containing sand, while reduce permeability and the compression of low plastic limit silt
Property and fragility；Specifically, due to relatively low containing the low plastic limit silt plasticity of sand, cohesiveness, and dispersiveness is higher；The present invention passes through
Lime and flyash are added, passes through the poly- effect of flocks and wadding of fine particle so that silt structure changes, silt particle energy
Larger coarse granule is enough formed, and then causes soil structure comparatively dense so that reacted in moisture soil more difficult to get access with particle,
Meanwhile the chemical reaction between lime, flyash and silt further generates calcareous cement, the connection between soil particle is added
Power and snap-in force so that the compression strength and ductility for preparing material improve；But because the aquation of lime, flyash and silt is anti-
It itself should consume the moisture of silt, while the further natural evaporation of moisture so that dehydration shrinkage in material capillary, formed to system
One tension of standby material, because now material is in the plastic stage in itself, the plastic tensile strength of its own is relatively low, then leads
Although cause improves compression strength and ductility, material still easy cracking phenomenon in itself is prepared；In addition high-speed railway subgrade by
Train load influence is very big, and the soil body can produce elastic deformation and plastic deformation under dynamic loading, so as to cause soil fatigue
Destroy, therefore the addition for only relying on lime and/or flyash still can not meet need of the silt as Subgrade Filled Soil in High Speed Railway
Ask, inventor is had been surprisingly found that by test of many times, then can effectively be solved by adding a certain amount of polypropylene fibre into the material
Certainly above mentioned problem.Polypropylene fibre is a kind of high intensity bundle fiber using polypropylene as raw material, being fabricated.In the prior art
It has been reported that it adds in mortar concrete solid plastic shrinkage, drying shrinkage, the temperature change that can effectively control cement concrete
Etc. microcrack caused by factor, prevent and suppress the formation and development in crack, improve the anti-cracking impervious property of concrete, shock resistance and
Shock resistance；The present invention has been surprisingly found that its volume controls by adding the polypropylene fibre compared with low-dosage in the material to preparation
At 2 ‰ -4 ‰, the saturation unconfined compressive strength and ductility of silt can be significantly improved, while does not influence low plastic limit silt
Permeability and compressibility, but further improve volume, then compression strength significantly reduces, and cracking resistance toughening effect difference does not show
Write.
The second aspect of the invention, disclose the system of the Subgrade Filled Soil in High Speed Railway of the above-mentioned low plastic limit silt improvement containing sand
Preparation Method, specifically include：
1) flyash, lime and polypropylene fibre are mixed containing the low abundant mix of plastic limit silt of sand in proportion；
2) Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand plus after water stirring is produced.
Preferably, the lime is the lime after resolution；
Preferably, the amount of water control is in wop~wop+ 2%, wherein wopIt is low containing sand according to modified compaction test measure
The optimum moisture content of plastic limit silt；
The third aspect of the invention, above-mentioned roadbed filling is disclosed in Subgrade Filled Soil in High Speed Railway and/or inter-city passenger rail
Application in roadbed filling.
Beneficial effect of the present invention：The present invention is by rationally adding each component, so as to which a kind of high-speed railway subgrade be prepared
Filler, the filler can not only improve the saturation unconfined compressive strength of the low plastic limit silt containing sand and ductility, reduce the soil
Permeability and compressibility and fragility, improve the intensity and durability of the soil body, while also help the utilization of solid refuse, pass through
Cross after improvement and can be used for high-speed railway, inter-city passenger rail roadbed filling containing the low plastic limit silt of sand, helping, which reduces high-speed railway, builds
It is set as this.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
With reference to instantiation, the present invention is further illustrated, and following instance is not right merely to the explanation present invention
Its content is defined.If unreceipted experiment actual conditions in embodiment, generally according to normal condition, or it is public according to reagent
The recommended condition of department；Reagent used, consumptive material etc., unless otherwise specified, are commercially obtained in following embodiments.
As it was previously stated, existing conventional curing agent has the industrial raw material such as cement, lime, slag or dead meal, although
Can change the soil body mineralogical composition, improve the soil body intensity and durability, but improve after the soil body often show it is certain
Brittleness, and it is larger to soil structures stability influence.
In view of this, a kind of high speed of the low plastic limit silt improvement containing sand is provided in a kind of embodiment of the invention
Subgrade Packing, according to gross weight meter, each component and proportioning are respectively：Lime 4%-5%, flyash 21%-27%, poly- third
Alkene fiber 2 ‰ -4 ‰, the fibre length of the polypropylene fibre is 1-5cm, and remaining is containing the low plastic limit silt of sand；
Wherein, the roadbed embankment material is according to gross weight meter, each composition and ratio：Lime is 5%, and flyash is
25%, polypropylene fibre is 4 ‰, and the polypropylene fibre length is 3cm, and remaining is containing the low plastic limit silt of sand；
Wherein, the fiber is polypropylene fibre, fibre fineness 300D (danier)；
The calcareous quick lime (CL85) that the lime is CaO and content of MgO is >=85%；
The flyash is II grade, and loss on ignition is not more than 8%；
The liquid limit of the low plastic limit silt containing sand<40%, 30%<Coarse fraction≤50%, gravel grain group content≤sand grains group
Content；
In the still another embodiment of the present invention, there is provided the high-speed railway subgrade of the above-mentioned low plastic limit silt improvement containing sand is filled out
The preparation method of material, is specifically included：
1) flyash, lime and polypropylene fibre are mixed containing the low abundant mix of plastic limit silt of sand in proportion；
2) Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand plus after water stirring is produced.
Wherein, the lime is the lime after resolution；
The amount of water control is in wop~wop+ 2%, wherein wopIt is that the low plastic limit powder containing sand is determined according to modified compaction test
The optimum moisture content of soil；
In the still another embodiment of the present invention, there is provided above-mentioned roadbed filling in Subgrade Filled Soil in High Speed Railway and/or
Application in inter-city passenger rail roadbed filling.
Below by embodiment and experimental example, the operation to the present invention, it is described in further detail.
Embodiment 1
A kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand, according to roadbed filling gross weight meter, each component
And proportioning is respectively：Lime is 5%, flyash 25%, and polypropylene fibre is 4 ‰, and the polypropylene fibre length is 3cm,
Remaining is containing the low plastic limit silt of sand；
Wherein, lime：CaO and the calcareous quick lime (CL85) that content of MgO is >=85%.
Flyash：II grade of flyash, loss on ignition are not more than 8%, power plant are defended from the Lingshan.
Fiber：Polypropylene fibre, fibre fineness 300D.
Soil used in the present invention is Dongying, Shandong Province silt, and the basic physical index for testing soil sample is as shown in table 1.
Table 1 tests the basic physical index of soil sample
Specifically preparation method is：
1) flyash, lime and polypropylene fibre are mixed containing the low abundant mix of plastic limit silt of sand in proportion；
2) plus water stirring produces the Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand after standard curing.
Wherein, the lime is the lime after resolution；
The amount of water control is in wop~wop+ 2%, wherein wopIt is that the low plastic limit powder containing sand is determined according to modified compaction test
The optimum moisture content of soil.
Carry out evaluating consolidation effect evaluation using unconfined compressive strength (UCS) experiment.After sample shaping and demoulding, it is put into foster
Protect room and carry out standard curing (20 ± 2 DEG C of temperature, relative humidity >=95%).
Embodiment 2
A kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand, according to roadbed filling gross weight meter, each component
And proportioning is respectively：Lime is 4%, flyash 21%, and polypropylene fibre is 3 ‰, and the polypropylene fibre length is 3cm,
Remaining is containing the low plastic limit silt of sand；
Wherein, lime：CaO and the calcareous quick lime (CL85) that content of MgO is >=85%.
Flyash：II grade of flyash, loss on ignition are not more than 8%, power plant are defended from the Lingshan.
Fiber：Polypropylene fibre, fibre fineness 300D.
Soil used in the present invention is Dongying, Shandong Province silt, and the basic physical index for testing soil sample is as shown in table 2.
Table 2 tests the basic physical index of soil sample
Specifically preparation method is：
1) flyash, lime and polypropylene fibre are mixed containing the low abundant mix of plastic limit silt of sand in proportion；
2) plus water stirring produces the Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand after standard curing.
Wherein, the lime is the lime after resolution；
The amount of water control is in wop~wop+ 2%, wherein wopIt is that the low plastic limit powder containing sand is determined according to modified compaction test
The optimum moisture content of soil.
Embodiment 3
A kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand, according to roadbed filling gross weight meter, each component
And proportioning is respectively：Lime is 4%, flyash 27%, and polypropylene fibre is 3 ‰, and the polypropylene fibre length is 5cm,
Remaining is containing the low plastic limit silt of sand；
Wherein, lime：CaO and the calcareous quick lime (CL85) that content of MgO is >=85%.
Flyash：II grade of flyash, loss on ignition are not more than 8%, power plant are defended from the Lingshan.
Fiber：Polypropylene fibre, fibre fineness 300D.
Soil used in the present invention is Dongying, Shandong Province silt, and the basic physical index for testing soil sample is as shown in table 3.
Table 3 tests the basic physical index of soil sample
Specifically preparation method is：
1) flyash, lime and polypropylene fibre are mixed containing the low abundant mix of plastic limit silt of sand in proportion；
2) plus water stirring produces the Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand after standard curing.
Wherein, the lime is the lime after resolution；
The amount of water control is in wop~wop+ 2%, wherein wopIt is that the low plastic limit powder containing sand is determined according to modified compaction test
The optimum moisture content of soil.
Experimental example 4
A kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand, according to roadbed filling gross weight meter, each component
And proportioning is respectively：Lime is 5%, flyash 27%, and polypropylene fibre is 4 ‰, and the polypropylene fibre length is 5cm,
Remaining is containing the low plastic limit silt of sand；
Wherein, lime：CaO and the calcareous quick lime (CL85) that content of MgO is >=85%.
Flyash：II grade of flyash, loss on ignition are not more than 8%, power plant are defended from the Lingshan.
Fiber：Polypropylene fibre, fibre fineness 300D.
Soil used in the present invention is Dongying, Shandong Province silt, and the basic physical index for testing soil sample is as shown in table 4.
Table 4 tests the basic physical index of soil sample
Specifically preparation method is：
1) flyash, lime and polypropylene fibre are mixed containing the low abundant mix of plastic limit silt of sand in proportion；
2) plus water stirring produces the Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand after standard curing.
Wherein, the lime is the lime after resolution；
The amount of water control is in wop~wop+ 2%, wherein wopIt is that the low plastic limit powder containing sand is determined according to modified compaction test
The optimum moisture content of soil.
According to UCS result of the tests, in lime 4%-5%, flyash 21%-27%, polypropylene fibre 2 ‰ -4 ‰, fiber
Length 1-5cm, fibre fineness 300D, remaining be containing the low plastic limit silt of sand in the range of, the 7d saturations of conditioned soil obtained by various combination
Unconfined compressive strength value is all higher than 250kPa (being shown in Table 5), meets intensity requirement of the high-speed railway subgrade to conditioned soil.
Wherein proportioning for lime 5%, flyash 25%, polypropylene fibre 4 ‰, fibre length 3cm, fibre fineness 300D,
Remaining is 614.6kPa for the 7d saturation unconfined compressive strengths of the conditioned soil of the low plastic limit silt containing sand, with resisting without lateral spacing for plain soil
Compressive Strength (69.2kPa), which is compared, improves nearly 10 times, with not mixing the 7d saturations of fiber (only lime and flyash) without lateral spacing resistance to compression
Intensity compared to improving nearly 2 times, reach 7d saturation unconfined compressive strength peak values axial strain be respectively increased nearly 10 times and
2.5 times, and water stability is good, is the optimum mix of the present invention.
The different mixture ratio conditioned soil saturation unconfined compressive strength of table 5 and residual strength experimental result
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand, it is characterised in that according to gross weight meter, each component
And proportioning is respectively：Lime 4%-5%, flyash 21%-27%, polypropylene fibre 2 ‰ -4 ‰, the fibre of the polypropylene fibre
Dimension length is 1-5cm, and remaining is containing the low plastic limit silt of sand.
A kind of 2. roadbed filling as claimed in claim 1, it is characterised in that the roadbed material according to gross weight meter, respectively into
Divide and ratio is：Lime is 5%, flyash 25%, and polypropylene fibre is 4 ‰, and the polypropylene fibre length is 3cm, its
Remaining is containing the low plastic limit silt of sand.
3. a kind of roadbed filling as claimed in claim 1 or 2, it is characterised in that the fiber is polypropylene fibre, fiber finer
Spend 300D.
A kind of 4. roadbed filling as claimed in claim 1 or 2, it is characterised in that the lime be CaO with content of MgO for >=
85% calcareous quick lime (CL85).
5. a kind of roadbed filling as claimed in claim 1 or 2, it is characterised in that the flyash is II grade, and loss on ignition is little
In 8%.
A kind of 6. roadbed filling as claimed in claim 1 or 2, it is characterised in that the liquid limit of the low plastic limit silt containing sand<
40%, 30%<Coarse fraction≤50%, gravel grain group content≤sand grains group content.
7. the preparation method of the Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand as described in claim any one of 1-6,
Characterized in that, specifically include：
1) flyash, lime and polypropylene fibre are mixed containing the low abundant mix of plastic limit silt of sand in proportion；
2) Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand plus after water stirring is produced.
8. a kind of preparation method as claimed in claim 7, it is characterised in that the lime is the lime after resolution.
9. a kind of preparation method as claimed in claim 7, it is characterised in that the amount of water control is in wop~wop+ 2%, its
Middle wopIt is the optimum moisture content that the low plastic limit silt containing sand is determined according to modified compaction test.
10. any one of the claim 1-6 roadbed fillings are in Subgrade Filled Soil in High Speed Railway and/or inter-city passenger rail roadbed filling
Application.
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| CN109437791A (en) * | 2018-12-30 | 2019-03-08 | 中铁隧道局集团有限公司 | A kind of modified lime soil and preparation method thereof suitable for Han Qu |
| CN111395081A (en) * | 2020-03-25 | 2020-07-10 | 长安大学 | Environment-friendly low-liquid-limit silt subgrade improvement method |
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| CN109437791A (en) * | 2018-12-30 | 2019-03-08 | 中铁隧道局集团有限公司 | A kind of modified lime soil and preparation method thereof suitable for Han Qu |
| CN111395081A (en) * | 2020-03-25 | 2020-07-10 | 长安大学 | Environment-friendly low-liquid-limit silt subgrade improvement method |
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