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Improvement method of salinized soil for highway construction

A technology for highway construction and saline soil, applied in chemical instruments and methods, applications, building structures, etc., can solve the problems of incomplete isolation, difficult construction, and high engineering costs, and achieve simple construction methods, low costs, and restraint. The effect of migration

Pending Publication Date: 2022-04-12
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the physical improvement method used in the above patents has the effect of isolating the salinity of the subgrade in saline soil areas, it still has the problems of difficult construction, high engineering cost, and incomplete isolation in the later stage

Method used

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  • Improvement method of salinized soil for highway construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, 30 g of acrylamide was dissolved in 41 g of water, and after stirring, 23 g of acrylic acid was added, and after stirring at 25 ° C for 20 min, 8 G polyoxyethylene ether was added to the above solution, stirred and dissolved, and labeled a solution The other 0.5 g of ammonium sulfate and sodium hydrogen sulfite were added to 32 g of water, and after stirring at 30 ° C, a 1 G crosslinker N, N methylene bisacrylamide, stirred and dissolved, and labeled B Solution. The solution A was added to 1000 g of saline soil, and mixed well and mixed well. After sealed 2 h at room temperature, then the B solution was added, and after mixing well, the obtained modified saline soil was placed in the mold, pressed into a cylinder. The test piece was then maintained at room temperature for 2 days, and there was no supened compressive strength.

Embodiment 2

[0019] First, 42 g of acrylamide was dissolved in 60 g of water, and after stirring, 15 g of methyl methacrylate was added, and after stirring at 30 ° C for 20 min, 5 g of polyvinyl alcohol was added to the above solution, stirred and dissolved, and labeled For a solution; another 0.3 g of ammonium sulfate and sodium hydrogen sulfite, after stirring at 40 ° C, 0.8 g of crosslinking agent N, N methylene bis acrylamide, stirred, and labeled The B solution. The solution A was added to 1000 g of saline soil, and mixed well and mixed well. After sealed 2 h at room temperature, then the B solution was added, and after mixing well, the obtained modified saline soil was placed in the mold, pressed into a cylinder. The test piece was then maintained at room temperature for 2 days, and there was no supened compressive strength.

Embodiment 3

[0021] First, 35 g of sodium acrylate was dissolved in 35 g of water, and after stirring, 25 g of maleic anhydride was added, and after stirring at 40 ° C for 20 min, 2 g of polyvinyl alcohol and 2 g of polyoxyethylene ether were added to the above solution, thoroughly stirred Dissolve, and labeled a solution; another 1.2 g of ammonium sulfate and sodium hydrogen sulfite was added to 37 g of water, and after stirring at 40 ° C, the 1.5 G crosslinking agent N, N methylene bis acrylamide, The mixture was dissolved and labeled a B solution. The solution A was added to 1000 g of saline soil, and mixed well and mixed well. After sealed 2 h at room temperature, then the B solution was added, and after mixing well, the obtained modified saline soil was placed in the mold, pressed into a cylinder. The test piece was then maintained at room temperature for 2 days, and there was no supened compressive strength.

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Abstract

The invention provides an improvement method of salinized soil for road construction, active components used in the improvement method mainly comprise an organic monomer, a polymer, an initiator and a cross-linking agent, the organic monomer is one or more of acrylamide, acrylic acid, methyl methacrylate, maleic anhydride, styrene, sodium acrylate and hydroxyethyl methylacrylate, and the polymer is one or more of acrylamide, acrylic acid, methyl methacrylate, maleic anhydride, styrene, sodium acrylate and hydroxyethyl methylacrylate. The polymer is polyvinyl alcohol, polyoxyethylene ether or polyethylene glycol, the initiator is ammonium persulfate and sodium hydrogen sulfite, and the cross-linking agent is N, N-methylene bisacrylamide. Through a polymer net structure formed by in-situ polymerization reaction of organic monomers in soil, soil particles are fixed, and salt migration is inhibited. The improved salinized soil has high compressive strength and can meet the use requirements of high-strength roadbeds.

Description

Technical field [0001] The present invention relates to a method of improvement of saline soil for highway construction, belonging to the field of saline soil grate on the harvest of saline soil in the drought area. Background technique [0002] Due to the lack of research results, technical support, and related engineering applications in saline soil improvement agent, the current production of saline soil treated plans in the highway construction process, there is mainly improved road-based method, set partition layer and subgrade Filling treatment method, the roadbed filler is mostly unsatisfactory soil or weak saline soil, and a large amount of flux is required to transport long-distance soil transportation, which greatly improves the project cost. CN201710013851.3 disclose saline soil filled with saline soil, soluble calcium salt, urea and microbial formulations, and the saline soil base filler has a high compressive strength. CN201810927232.X discloses a construction method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/22C09K17/20C09K103/00
Inventor 唐志诚赵海军李联伟王玉忠边庆华
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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