CN107620238A - A kind of Subgrade Filled Soil in High Speed Railway and preparation method based on lignin curing agent - Google Patents
A kind of Subgrade Filled Soil in High Speed Railway and preparation method based on lignin curing agent Download PDFInfo
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- CN107620238A CN107620238A CN201710966681.0A CN201710966681A CN107620238A CN 107620238 A CN107620238 A CN 107620238A CN 201710966681 A CN201710966681 A CN 201710966681A CN 107620238 A CN107620238 A CN 107620238A
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Abstract
The invention belongs to Subgrade Filled Soil in High Speed Railway technical field, is related to a kind of Subgrade Filled Soil in High Speed Railway and preparation method based on lignin curing agent.According to Subgrade Filled Soil in High Speed Railway gross weight meter, each component and proportioning are respectively：Lignin 6% 10%, lime 3% 4%, remaining is the low plastic limit silt containing sand.The present invention uses the low plastic limit silt of lignin and lime improvement containing sand; not only increase the native unconfined compressive strength and water stability; also reduce the native compressibility and fragility; soil after improvement can be used for high-speed railway, the roadbed filling of inter-city passenger rail, be advantageous to solid refuse utilization, environmental protection and sustainable development.
Description
Technical field
The invention belongs to Subgrade Filled Soil in High Speed Railway technical field, in particular it relates to a kind of based on lignin curing agent
Subgrade Filled Soil in High Speed Railway and preparation method.
Background technology
Silt is not only widely distributed in the whole nation, and silt is also distributed with the area of Shandong Province 34%.Silt belongs to C group railways more
Roadbed filling, it is impossible to be directly used in high-speed railway, it is necessary to improved.As high-speed railway is in China's fast development, for sand
The relative area lacked of the high quality fillers such as stone and the area of silt large area distribution, rationally roadbed is used as by improveing by the use of silt
Filler is paid attention to by railway and highway industry.
The conventional curing agents commonly used at present in engineering not only produce corrosion, the soil body after improvement to materials such as vegetation, reinforcing bars
Certain Brittleness is also often shown, it is larger to soil structures stability influence.Compared with traditional inorganic solidification agent, as life
The lignin of thing energy byproduct has the advantages that environment-friendly, cost is cheap, chemical property is relatively stable.In addition, lignin
Reserves very abundant in nature and regenerated every year with 50,000,000,000,000 kilograms of speed.Up to the present, China exceedes
95% lignin byproduct burns after rivers or concentration are directly discharged into the form of " black liquor ", and recovery utilization rate is relatively low, not only makes
Into the serious waste of resource, certain harm is also produced to environment.Therefore, silt is carried out using lignin as primary curing dose
Improvement, is allowed to the engine request for meeting roadbed filling, can not only meet the needs of high-speed railway Large scale construction, also help
Economize on resources, environmental protection and sustainable development.
CN103305226A discloses the silt curing agent and its curing of a kind of silt roadbed, the silt solidification
Agent, including lignin, improvement lignin and/or lignin derivative as bioenergy byproduct；More environmentally friendly scheme
It is directly to use a kind of silt curing agent that black liquor caused by paper production proposes for primary raw material as this case.The silt road
The curing of base, is constructed using spray-on process, and master operation is：Sub-layer prepares, lignin is prepared, sprays and mix, leveling
With rolling, initial curing.But although this method enhances the toughness of filler but also sacrifices intensity, can be used for highway subgrade but
The requirement of high ferro railway bed is not reached.
The content of the invention
In order to solve the problems, such as that the low plastic limit silt containing sand cannot be directly used to high-speed railway subgrade, the invention provides one
Subgrade Filled Soil in High Speed Railway and preparation method of the kind based on lignin curing agent.
An object of the present invention is to provide that a kind of intensity and toughness has both can be used for high-speed railway subgrade
Roadbed filling.
The second object of the present invention is to provide that a kind of process is simple, raw material is easy to get, economic and environment-friendly high-speed railway subgrade
The preparation method of filler.
In order to realize above-mentioned technical purpose, present invention employs following technical scheme：
The present invention provides a kind of Subgrade Filled Soil in High Speed Railway based on lignin curing agent, including silt and curing agent, institute
It is lignin and lime to state curing agent.
Preferably, mass fraction of the curing agent in roadbed filling is 9%-14%.
Preferably, mass fraction of the curing agent in roadbed filling is 9%.
Preferably, the mass fraction of the curing agent kind each component is：Lignin 60%-77%, lime 23%-40%.
Preferably, the mass fraction of the curing agent kind each component is：Lignin 67%, lime 33%.
Preferably, the calcareous calcium lime powder of building that the lime is CaO and content of MgO is >=85%.
Preferably, the lignin is sodium lignin sulphate.
Preferably, the silt is the low plastic limit silt containing sand, its liquid limit<40%, 30%<Coarse fraction≤50%, gravel
Grain group content≤sand grains group content.
The present invention also provides a kind of preparation method of the Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand, made
Method includes：
(1) quick lime is fully cleared up；
(2) by the lime after lignin and resolution by low plastic limit silt mix of the proportioning incorporation containing sand；
(3) plus water stirring, amount of water are controlled in wop~wop+ 2%, wopIt is the conditioned soil determined according to modified compaction test
Optimum moisture content, the high ferro roadbed filling after being improved.
Beneficial effects of the present invention
(1) present invention is using lignin and lime as curing agent, can not only improve the low plastic limit silt containing sand without side
Limit compression strength and water stability, reduce the native permeability and compressibility and fragility, it is ensured that its intensity, successfully prepare
The roadbed filling that intensity and toughness have both.
(2) present invention is beneficial to the utilization of solid refuse, saves natural resources and sustainable development, and the soil after improvement can
For high-speed railway and inter-city passenger rail roadbed filling.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the present invention.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with general technical staff of the technical field of the invention
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 present invention.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 and/or combinations thereof.
Really as stated in the Background Art, the conventional conventional curing agents of existing silt roadbed material are not only to vegetation, reinforcing bar etc.
Material produces corrosion, and the soil body after improvement also often shows certain Brittleness, larger to soil structures stability influence, and
The fragility of roadbed is although improved as curing agent using lignin, but also makes the intensity decreases of roadbed, is unable to reach high-speed iron
Road is to the intensity and toughness of roadbed and the requirement of durability.
The present invention provides the Subgrade Filled Soil in High Speed Railway that a kind of intensity and toughness have both, and solidification is used as using lignin and lime
Agent, the wooden effect for being known as surfactant, the low price cation Na in lignin+With the high-valence cationic Ca in system2+Hair
Raw ion exchange, carries Ca2+Lignin form positively charged complex compound and be dispersed in system, complex compound with electricity
The silt particle of negativity combines under electrostatic interaction.Ca2+With the SiO in silt2Isoreactivity silicate generates under alkaline environment
Hard material, lignin are connected with hard material by chemical bond, and the work of blind and adhesive is played in system
With.
Embodiment 1
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.
Prepare 6% lignin, 3% quick lime and low plastic limit silt by proportioning, quick lime is fully cleared up；Will be wooden
Low plastic limit silt mix of the lime incorporation containing sand after element and resolution；Water is added to stir, amount of water is controlled in wop~wop+ 2%, wop
It is the high ferro roadbed filling after being improved according to the optimum moisture content of the conditioned soil of modified compaction test measure.
Embodiment 2
Prepare 10% lignin, 4% quick lime and low plastic limit silt by proportioning, quick lime is fully cleared up；By wood
Low plastic limit silt mix of the lime incorporation containing sand after quality and resolution；Water is added to stir, amount of water is controlled in wop~wop+ 2%,
wopIt is the high ferro roadbed filling after being improved according to the optimum moisture content of the conditioned soil of modified compaction test measure.
Embodiment 3
Change the proportioning of lignin and quick lime, other steps adopt the improvement high ferro roadbed filling of preparation with embodiment 1
Carried out evaluating consolidation effect evaluation with unconfined compressive strength (UCS) experiment.After sample shaping and demoulding, it is put into fog room and enters rower
Quasi- maintenance (20 ± 2 DEG C of temperature, relative humidity >=95%), result of the test is as shown in table 2.
The result of the test of table 2.
According to UCS result of the tests, lignin 6%-10%, lime (CL85QP) 3%-4%, remaining be the low modeling containing sand
Limit in the range of silt, the 7d saturation unconfined compressive strength values of conditioned soil are all higher than 250kPa obtained by various combination, meet at a high speed
Intensity requirement of the railway bed to conditioned soil.
As can be seen from Table 2, match as lignin 6%, lime 3%, conditioned soil that remaining is the low plastic limit silt containing sand
7d saturations unconfined compressive strength is 324kPa, is not disintegrated according to water stability experiment.
Although the embodiment of the present invention is described above-described embodiment, not to invention protection domain
Limitation, one of ordinary skill in the art should be understood that on the basis of the technical scheme of invention those skilled in the art need not pay
Go out various modifications that creative work can make or deformation is still within the scope of the present invention.
Claims (10)
- A kind of 1. Subgrade Filled Soil in High Speed Railway based on lignin curing agent, it is characterised in that：It is described including silt and curing agent Curing agent is lignin and lime.
- 2. the Subgrade Filled Soil in High Speed Railway as claimed in claim 1 based on lignin curing agent, it is characterised in that：The solidification Mass fraction of the agent in roadbed filling is 9%-14%.
- 3. the Subgrade Filled Soil in High Speed Railway as claimed in claim 1 based on lignin curing agent, it is characterised in that：The solidification Mass fraction of the agent in roadbed filling is 9%.
- 4. the Subgrade Filled Soil in High Speed Railway as claimed in claim 1 based on lignin curing agent, it is characterised in that：The solidification The mass fraction of agent kind each component is：Lignin 60%-77%, lime 23%-40%.
- 5. the Subgrade Filled Soil in High Speed Railway as claimed in claim 1 based on lignin curing agent, it is characterised in that：The solidification The mass fraction of agent kind each component is：Lignin 67%, lime 33%.
- 6. the Subgrade Filled Soil in High Speed Railway as claimed in claim 1 based on lignin curing agent, it is characterised in that：The lime For：CaO and the calcareous calcium lime powder of building that content of MgO is >=85%.
- 7. the Subgrade Filled Soil in High Speed Railway as claimed in claim 1 based on lignin curing agent, it is characterised in that：It is described wooden Element is sodium lignin sulphate.
- 8. the Subgrade Filled Soil in High Speed Railway as claimed in claim 1 based on lignin curing agent, it is characterised in that：The silt For the low plastic limit silt containing sand, its liquid limit<40%, 30%<Coarse fraction≤50%, gravel grain group content≤sand grains group content.
- 9. the preparation method of the Subgrade Filled Soil in High Speed Railway based on lignin curing agent as described in claim 1-8 is any, its It is characterised by, made method includes：(1) quick lime is fully cleared up, by the lime after lignin and resolution by low plastic limit silt of the proportioning incorporation containing sand Mix；(2) plus water stirring, amount of water are controlled in wop~wop+ 2%, wopBe according to modified compaction test determine conditioned soil most Excellent water content, the high ferro roadbed filling after being improved.
- 10. the Subgrade Filled Soil in High Speed Railway based on lignin curing agent as described in claim 1-8 is any, which is used as, tells railway The application of roadbed filling.
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| CN201710966681.0A CN107620238A (en) | 2017-10-17 | 2017-10-17 | A kind of Subgrade Filled Soil in High Speed Railway and preparation method based on lignin curing agent |
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| CN201710966681.0A CN107620238A (en) | 2017-10-17 | 2017-10-17 | A kind of Subgrade Filled Soil in High Speed Railway and preparation method based on lignin curing agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921730A (en) * | 2021-01-20 | 2021-06-08 | 南京工业大学 | Discrete reinforced modified silt and modification method based on lignin and fibers |
Citations (5)
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|---|---|---|---|---|
| JPS60170688A (en) * | 1984-02-16 | 1985-09-04 | Kajima Corp | Soil improving material |
| KR0125466B1 (en) * | 1993-12-21 | 1997-12-18 | 백운 | Soil stabilizer and process thereof |
| JP2009291126A (en) * | 2008-06-05 | 2009-12-17 | Kitagawa Giken Kogyo:Kk | Culture soil, and greening construction method using the same |
| CN103305226A (en) * | 2013-05-31 | 2013-09-18 | 东南大学 | Silt soil curing agent of silt soil subgrade, and curing method thereof |
| CN106045437A (en) * | 2016-05-30 | 2016-10-26 | 刘文白 | Soft soil solidification reinforcing agent |
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2017
- 2017-10-17 CN CN201710966681.0A patent/CN107620238A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60170688A (en) * | 1984-02-16 | 1985-09-04 | Kajima Corp | Soil improving material |
| KR0125466B1 (en) * | 1993-12-21 | 1997-12-18 | 백운 | Soil stabilizer and process thereof |
| JP2009291126A (en) * | 2008-06-05 | 2009-12-17 | Kitagawa Giken Kogyo:Kk | Culture soil, and greening construction method using the same |
| CN103305226A (en) * | 2013-05-31 | 2013-09-18 | 东南大学 | Silt soil curing agent of silt soil subgrade, and curing method thereof |
| CN106045437A (en) * | 2016-05-30 | 2016-10-26 | 刘文白 | Soft soil solidification reinforcing agent |
Non-Patent Citations (6)
| Title |
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| 张涛: "基于工业副产品木质素的粉土固化改良技术与工程应用研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 张涛等: "工业副产品木质素改良路基粉土的微观机制研究", 《岩土力学》 * |
| 张涛等: "木质素改良粉土临界状态剪切特性试验", 《中国公路学报》 * |
| 李军海等: "工业副产品木质素的岩土工程应用与发展", 《路基工程》 * |
| 林罗斌: "木质素纤维-粉煤灰改良三轴实验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 马强等: "水利工程施工中软土地基的处理方法", 《河南水利与南水北调》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921730A (en) * | 2021-01-20 | 2021-06-08 | 南京工业大学 | Discrete reinforced modified silt and modification method based on lignin and fibers |
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Application publication date: 20180123 |