CN114316995A - Improvement method of saline soil for highway construction - Google Patents
Improvement method of saline soil for highway construction Download PDFInfo
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- CN114316995A CN114316995A CN202210023282.1A CN202210023282A CN114316995A CN 114316995 A CN114316995 A CN 114316995A CN 202210023282 A CN202210023282 A CN 202210023282A CN 114316995 A CN114316995 A CN 114316995A
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- solution
- saline soil
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- organic monomer
- soil
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- 239000002689 soil Substances 0.000 title claims abstract description 63
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 52
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010276 construction Methods 0.000 title claims abstract description 18
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000178 monomer Substances 0.000 claims abstract description 20
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 17
- 239000003999 initiator Substances 0.000 claims abstract description 14
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims abstract description 13
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 13
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims abstract description 13
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims abstract description 11
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical group C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 8
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 8
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 6
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims abstract description 5
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims abstract description 5
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229940047670 sodium acrylate Drugs 0.000 claims abstract description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 62
- 238000003756 stirring Methods 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 abstract description 5
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 238000006116 polymerization reaction Methods 0.000 abstract description 3
- 230000005012 migration Effects 0.000 abstract description 2
- 238000013508 migration Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 description 16
- 238000003825 pressing Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 238000004090 dissolution Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
Abstract
The invention provides a method for improving saline soil for highway construction, which mainly comprises an organic monomer, a polymer, an initiator and a cross-linking agent, wherein the organic monomer is one or more of acrylamide, acrylic acid, methyl methacrylate, maleic anhydride, styrene, sodium acrylate and hydroxyethyl methacrylate, the polymer is polyvinyl alcohol, polyoxyethylene ether or polyethylene glycol, the initiator is ammonium persulfate and sodium bisulfite, and the cross-linking agent is N, N methylene bisacrylamide. The polymer network structure formed by the in-situ polymerization reaction of the organic monomer in the soil fixes soil particles and inhibits the migration of salt. The improved saline soil has higher compressive strength and can meet the use requirement of a high-strength roadbed.
Description
Technical Field
The invention relates to an improvement method of saline soil for highway construction, and belongs to the field of improvement of saline soil roadbed treatment in cold and dry areas.
Background
Because of lack of research results, technical supports and related engineering application examples in the aspect of using a saline soil improving agent for roads, the saline soil treatment scheme adopted in the prior highway construction process in the saline soil area mainly comprises a roadbed improvement method, a partition layer arrangement and a roadbed replacement and filling treatment method, most roadbed fillers adopt a non-saline soil or weak saline soil replacement and filling mode, and a large amount of replacement and filling needs long-distance soil material transportation, so that the engineering cost is greatly improved. CN201710013851.3 discloses a salinized soil filler composed of salinized soil, soluble calcium salt, urea and a microbial agent, wherein the salinized soil matrix filler has high compressive strength. CN201810927232.X discloses an active salt isolation construction method for a roadbed in a saline soil area. Although the physical improvement method used in the above patents has an isolation effect on the salt content of the roadbed in the saline soil area, the problems of high construction difficulty, high construction cost and incomplete later isolation still exist.
Disclosure of Invention
The invention provides an improvement method of salinized soil for chemical highway construction aiming at the problems encountered in the salinized soil roadbed construction in the west corridor area of Gansu Hexi, wherein the active components used in the improvement method mainly comprise organic monomers, polymers, initiators and cross-linking agents, and the mechanical strength and the water-resistant stability of the salinized soil are enhanced and improved by utilizing the method that the organic monomers and the initiators are subjected to in-situ polymerization in the salinized soil.
A method for improving saline soil for highway construction comprises the following steps:
(1) adding an organic monomer into water, and fully stirring and dissolving in a water bath at 25-50 ℃ to obtain an organic monomer aqueous solution; wherein the organic monomer is one or more of acrylamide, acrylic acid, methyl methacrylate, maleic anhydride, styrene, sodium acrylate and hydroxyethyl methacrylate; the addition amount of the organic monomer is 0.5-10% of the mass of the saline soil.
(2) Adding a polymer into the organic monomer aqueous solution, stirring and dissolving, and marking as a solution A; wherein the polymer is polyvinyl alcohol, polyoxyethylene ether or polyethylene glycol; the addition amount of the polymer is 0-5% of the mass of the saline soil.
(3) Adding an initiator into water, and fully stirring and dissolving in a water bath at 25-50 ℃ to obtain an initiator solution; wherein the initiator is ammonium persulfate and sodium bisulfite; the addition amount of the initiator is 0.5-8% of the mass of the organic monomer, wherein the mass ratio of the ammonium persulfate to the sodium bisulfite is 1: 1.
(4) Adding a cross-linking agent into the initiator solution, fully stirring and dissolving, and marking as a solution B; wherein the cross-linking agent is N, N methylene bisacrylamide; the addition amount of the cross-linking agent is 0.5-6% of the mass of the organic monomer.
(5) Adding the solution A into the saline soil, stirring to fully mix the solution A with the saline soil, and then stewing for 0.5-4 h at 25-40 ℃.
(6) And after the material stewing is finished, adding the solution B, and uniformly stirring to obtain the improved saline soil. And (3) putting the improved saline soil into a grinding tool for compression molding, and measuring the unconfined compressive strength after curing for 2 days at room temperature.
The invention has the beneficial effects that:
(1) according to the invention, a chemical improvement method is used, so that the organic monomer is subjected to in-situ polymerization reaction in the saline soil, soil particles and salt are adsorbed and fixed on the organic polymer to the maximum extent, the strength and stability of the improved saline soil are improved, and the migration of the salt is inhibited;
(2) the addition amount of the active component for improvement in the saline soil is very low, and compared with a physical improvement method of the saline soil, the method has the advantages of low cost and simple construction mode;
(3) the improved saline soil has very high mechanical compressive strength, the unconfined compressive strength is higher than 2.5 MPa, and the use requirement of a high-strength roadbed can be met.
Detailed Description
The following examples are provided to further illustrate the method for improving saline soil for road construction of the present invention:
example 1
Firstly, dissolving 30 g of acrylamide in 41 g of water, stirring for dissolving, adding 23 g of acrylic acid, stirring for 20 min at 25 ℃, adding 8 g of polyoxyethylene ether into the solution, fully stirring for dissolving, and marking as solution A; 0.5 g of ammonium persulfate and sodium bisulfite were added to 32 g of water, and after stirring and dissolving at 30 ℃, 1 g of N, N-methylenebisacrylamide which is a crosslinking agent was added and dissolved with stirring, and the solution was labeled as solution B. Adding the solution A into 1000 g of saline soil, fully stirring and uniformly mixing, sealing, stewing for 2 hours at room temperature, then adding the solution B, fully mixing uniformly, putting the obtained improved saline soil into a mold, pressing to form a cylindrical test piece, and then curing for 2 days at room temperature, and measuring the unconfined compressive strength.
Example 2
Firstly, dissolving 42 g of acrylamide in 60 g of water, stirring for dissolving, adding 15 g of methyl methacrylate, stirring for 20 min at 30 ℃, adding 5 g of polyvinyl alcohol into the solution, fully stirring for dissolving, and marking as solution A; 0.3 g of ammonium persulfate and sodium bisulfite were added to 12 g of water, and after stirring and dissolution at 40 ℃, 0.8 g of N, N-methylenebisacrylamide which is a crosslinking agent was added and dissolved with stirring, and the solution was labeled as solution B. Adding the solution A into 1000 g of saline soil, fully stirring and uniformly mixing, sealing, stewing for 2 hours at room temperature, then adding the solution B, fully mixing uniformly, putting the obtained improved saline soil into a mold, pressing to form a cylindrical test piece, and then curing for 2 days at room temperature, and measuring the unconfined compressive strength.
Example 3
Firstly, 35 g of sodium acrylate is dissolved in 35 g of water, 25 g of maleic anhydride is added after stirring and dissolving, 2 g of polyvinyl alcohol and 2 g of polyoxyethylene ether are added into the solution after stirring for 20 min at 40 ℃, and the solution is fully stirred and dissolved and marked as solution A; 1.2 g of ammonium persulfate and sodium hydrogen sulfite were added to 37 g of water, and dissolved by stirring at 40 ℃ to obtain a solution, and 1.5 g of N, N-methylenebisacrylamide as a crosslinking agent was added and dissolved by stirring to obtain a solution B. Adding the solution A into 1000 g of saline soil, fully stirring and uniformly mixing, sealing, stewing for 2 hours at room temperature, then adding the solution B, fully mixing uniformly, putting the obtained improved saline soil into a mold, pressing to form a cylindrical test piece, and then curing for 2 days at room temperature, and measuring the unconfined compressive strength.
Example 4
Firstly, dissolving 30 g of maleic anhydride in 42 g of water, stirring for dissolving, adding 35 g of methyl methacrylate, stirring for 20 min at 30 ℃, adding 5 g of polyvinyl alcohol and 2 g of polyoxyethylene ether into the solution, fully stirring for dissolving, and marking as solution A; 1.5 g of ammonium persulfate and sodium bisulfite were added to 30 g of water, and after dissolving them under stirring at 35 ℃, 1.0 g of N, N-methylenebisacrylamide which is a crosslinking agent was added and dissolved under stirring, and the mixture was labeled as solution B. Adding the solution A into 1000 g of saline soil, fully stirring and uniformly mixing, sealing, stewing for 2 hours at room temperature, then adding the solution B, fully mixing uniformly, putting the obtained improved saline soil into a mold, pressing to form a cylindrical test piece, and then curing for 2 days at room temperature, and measuring the unconfined compressive strength.
Example 5
Firstly, 45 g of hydroxyethyl methacrylate is dissolved in 32 g of water, 10 g of styrene is added after stirring and dissolving, 43 g of polyvinyl alcohol is added into the solution after stirring for 40 min at 50 ℃, and the solution is fully stirred and dissolved and marked as solution A; 5 g of ammonium persulfate and sodium bisulfite were added to 50 g of water, and after stirring and dissolving at 50 ℃, 5.0 g of N, N-methylenebisacrylamide which is a crosslinking agent was added and dissolved with stirring, and the solution was labeled as solution B. Adding the solution A into 1000 g of saline soil, fully stirring and uniformly mixing, sealing, stewing for 2 h at 35 ℃, then adding the solution B, fully mixing uniformly, putting the obtained improved saline soil into a mold, pressing to form a cylindrical test piece, curing for 2 days at room temperature, and measuring the unconfined compressive strength.
Example 6
Firstly, dissolving 10 g of maleic anhydride in 42 g of water, stirring for dissolving, adding 40 g of acrylamide, stirring for 20 min at 50 ℃, adding 23 g of polyvinyl alcohol into the solution, fully stirring for dissolving, and marking as solution A; separately, 2.3 g of ammonium persulfate and sodium bisulfite were added to 38 g of water, and after dissolving them under stirring at 40 ℃, 2.0 g of N, N-methylenebisacrylamide which is a crosslinking agent was added and dissolved under stirring, and the mixture was labeled as solution B. Adding the solution A into 1000 g of saline soil, fully stirring and uniformly mixing, sealing, stewing for 1 h at 35 ℃, then adding the solution B, fully mixing uniformly, putting the obtained improved saline soil into a mold, pressing to form a cylindrical test piece, curing for 2 days at room temperature, and measuring the unconfined compressive strength.
Example 7
Firstly, dissolving 30 g of hydroxyethyl methacrylate in 50 g of water, stirring for dissolving, adding 15 g of acrylic acid, stirring for 60 min at 30 ℃, adding 10 g of polyoxyethylene ether into the solution, fully stirring for dissolving, and marking as solution A; 6 g of ammonium persulfate and sodium bisulfite were added to 25 g of water, and after stirring and dissolution at 30 ℃, 3.0 g of N, N-methylenebisacrylamide which is a crosslinking agent was added and stirred and dissolved, and the solution was labeled as solution B. Adding the solution A into 1000 g of saline soil, fully stirring and uniformly mixing, sealing, stewing for 3 h at 35 ℃, then adding the solution B, fully mixing uniformly, putting the obtained improved saline soil into a mold, pressing to form a cylindrical test piece, curing for 2 days at room temperature, and measuring the unconfined compressive strength.
Example 8
Firstly, dissolving 60 g of methyl methacrylate in 40 g of water, stirring for dissolving, adding 25 g of acrylic acid, stirring for 60 min at 30 ℃, adding 15 g of polyoxyethylene ether into the solution, fully stirring for dissolving, and marking as solution A; 5 g of ammonium persulfate and sodium bisulfite were added to 35 g of water, and after stirring and dissolution at 40 ℃, 2.0 g of N, N-methylenebisacrylamide which is a crosslinking agent was added and stirred and dissolved, and the solution was labeled as solution B. Adding the solution A into 1000 g of saline soil, fully stirring and uniformly mixing, sealing, stewing for 4 h at 40 ℃, then adding the solution B, fully mixing uniformly, putting the obtained improved saline soil into a mold, pressing to form a cylindrical test piece, curing for 2 days at room temperature, and measuring the unconfined compressive strength.
Claims (5)
1. A method for improving saline soil for highway construction comprises the following steps:
(1) adding an organic monomer into water, and fully stirring and dissolving in a water bath at 25-50 ℃ to obtain an organic monomer aqueous solution; wherein the organic monomer is one or more of acrylamide, acrylic acid, methyl methacrylate, maleic anhydride, styrene, sodium acrylate and hydroxyethyl methacrylate;
(2) adding a polymer into the organic monomer aqueous solution, stirring and dissolving, and marking as a solution A; wherein the polymer is polyvinyl alcohol, polyoxyethylene ether or polyethylene glycol;
(3) adding an initiator into water, and fully stirring and dissolving in a water bath at 25-50 ℃ to obtain an initiator solution; wherein the initiator is ammonium persulfate and sodium bisulfite;
(4) adding a cross-linking agent into the initiator solution, fully stirring and dissolving, and marking as a solution B; wherein the cross-linking agent is N, N methylene bisacrylamide;
(5) adding the solution A into the saline soil, stirring to fully mix the solution A with the saline soil, and then stewing for 0.5-4 h at 25-40 ℃;
(6) and after the material stewing is finished, adding the solution B, and uniformly stirring to obtain the improved saline soil.
2. The method for improving saline soil for road construction as claimed in claim 1, wherein: in the step (1), the adding amount of the organic monomer is 0.5-10% of the mass of the saline soil.
3. The method for improving saline soil for road construction as claimed in claim 1, wherein: in the step (2), the addition amount of the polymer is 0-5% of the mass of the saline soil.
4. The method for improving saline soil for road construction as claimed in claim 1, wherein: in the step (3), the addition amount of the initiator is 0.5-8% of the mass of the organic monomer, wherein the mass ratio of ammonium persulfate to sodium bisulfite is 1: 1.
5. The method for improving saline soil for road construction as claimed in claim 1, wherein: in the step (4), the addition amount of the cross-linking agent is 0.5-6% of the mass of the organic monomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210023282.1A CN114316995A (en) | 2022-01-10 | 2022-01-10 | Improvement method of saline soil for highway construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210023282.1A CN114316995A (en) | 2022-01-10 | 2022-01-10 | Improvement method of saline soil for highway construction |
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| Publication Number | Publication Date |
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| CN114316995A true CN114316995A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210023282.1A Pending CN114316995A (en) | 2022-01-10 | 2022-01-10 | Improvement method of saline soil for highway construction |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880355A (en) * | 2005-09-23 | 2006-12-20 | 中国矿业大学(北京) | Humic acid base ecological treating agent for water reservation of agriculture and forestry, and its preparation method |
| CN101508895A (en) * | 2009-03-17 | 2009-08-19 | 西安鸿森农业生态科技股份有限公司 | Agricultural water-loss reducer and production process |
| CN106495615A (en) * | 2016-11-03 | 2017-03-15 | 天津城建大学 | A kind of method of the cured modified salinized soil of acrylamide in-situ polymerization |
| CN112391170A (en) * | 2019-08-12 | 2021-02-23 | 李进东 | Organic polymer soil curing agent and preparation method thereof |
| CN112961284A (en) * | 2021-02-24 | 2021-06-15 | 青岛理工大学 | Saline-alkali-resistant slow-release water-absorbent resin with semi-interpenetrating network structure and application thereof |
-
2022
- 2022-01-10 CN CN202210023282.1A patent/CN114316995A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880355A (en) * | 2005-09-23 | 2006-12-20 | 中国矿业大学(北京) | Humic acid base ecological treating agent for water reservation of agriculture and forestry, and its preparation method |
| CN101508895A (en) * | 2009-03-17 | 2009-08-19 | 西安鸿森农业生态科技股份有限公司 | Agricultural water-loss reducer and production process |
| CN106495615A (en) * | 2016-11-03 | 2017-03-15 | 天津城建大学 | A kind of method of the cured modified salinized soil of acrylamide in-situ polymerization |
| CN112391170A (en) * | 2019-08-12 | 2021-02-23 | 李进东 | Organic polymer soil curing agent and preparation method thereof |
| CN112961284A (en) * | 2021-02-24 | 2021-06-15 | 青岛理工大学 | Saline-alkali-resistant slow-release water-absorbent resin with semi-interpenetrating network structure and application thereof |
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Application publication date: 20220412 |