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A treatment method for roadbed hazards

A roadbed and filling technology, applied in chemical instruments and methods, soil protection, infrastructure engineering, etc., can solve problems such as increased deformation, decreased strength, and impact on engineering performance of saline soil, achieving interaction enhancement and improvement Water retention and the effect of reducing shrinkage cracks

Active Publication Date: 2022-04-15
天津建设发展集团股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soluble salt in saline soil is dissolved in water, resulting in a significant decrease in strength and increased deformation, which seriously affects the engineering performance of saline soil as roadbed filler

Method used

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  • A treatment method for roadbed hazards
  • A treatment method for roadbed hazards
  • A treatment method for roadbed hazards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The soluble calcium salt used in the examples of the present invention is a mixture of calcium chloride, calcium dihydrogen phosphate, calcium carbonate, and calcium iodide, and the mass ratio of the four is 1:1:1:1.

[0038] The preparation method of microbial preparation used in the embodiment of the present invention:

[0039] Helicobacter pylori was inoculated in the culture medium (Bruchner's broth medium with 10% inactivated horse serum, with or without 3'-methoxy apigenin 0.2g / L), in a medium containing 5% O 2 , 10% CO 2 and 85%N 2 Under micro-aerobic conditions, cultured at 37°C for 72h, the density was 4×10 9 CFU / mL of bacterial liquid. Helicobacter pylori is a public strain, commercially available, and the deposit number is ATCC 43504.

[0040] The saline soil used in the embodiment of the present invention is chlorine saline soil, the water content of the soil is 18wt%, and the particle size is 0.15-0.20 mm.

[0041] Example 1:

[0042] Preparation of m...

Embodiment 2

[0051] The difference between the preparation of modified acrylate copolymer emulsion and Example 1 is: the molar ratio of MMA, BA, AA and entecavir impurity SSS in the mixed monomer is 1:0.4:0.3:0.2; the amount of emulsifier is the mass of the mixed monomer 3.7%; the amount of the initiator is 0.65% of the mass of the mixed monomers.

[0052] The raw materials of filling soil for prevention and treatment of roadbed hazards include, in parts by weight, 110 parts of saline soil, 7 parts of modified acrylate copolymer emulsion prepared in this embodiment, 10 parts of microbial preparations, 20 parts of soluble calcium salt, 15 parts 1 part urea, 2.5 parts polypropylene fiber.

[0053] A treatment method for roadbed hazards is the same as in Embodiment 1.

Embodiment 3

[0055] The difference between the preparation of the modified acrylate copolymer emulsion and Example 1 is that the molar ratio of MMA, BA, AA and entecavir impurity SSS in the mixed monomer is 1:0.25:0.35:0.28; the amount of emulsifier is the mass of the mixed monomer of 4.36%; the amount of the initiator is 0.57% of the mass of the mixed monomers.

[0056] The raw materials of filling soil for prevention and treatment of roadbed hazards include, in parts by weight, 95 parts of saline soil, 4 parts of modified acrylate copolymer emulsion prepared in this embodiment, 15 parts of microbial preparations, 32 parts of soluble calcium salt, 28 parts 1 part urea, 5 parts polypropylene fiber.

[0057] A treatment method for roadbed hazards is the same as in Embodiment 1.

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Abstract

The invention discloses a method for treating roadbed hazards, which relates to the technical field of geotechnical engineering, comprising: applying filling soil to the surface of the soil by paving and / or stirring and / or injecting, and controlling the thickness to 25-50 cm . Wherein, the filling soil includes saline soil, curing materials, microbial preparations, soluble calcium salts, urea and fibers; the above-mentioned curing materials include modified acrylate copolymer emulsions, and the above-mentioned modified acrylate copolymer emulsions contain at least carboxyl groups, hydroxyl groups, amino groups, The amide group hydrophilic group and the long polymer chain have a solid content of 24.5-30%. The method for treating roadbed hazards provided by the present invention, while the filling soil prepared in the treatment method has good compressive strength, the ability to resist compression deformation is significantly improved, and the drying shrinkage strain value is reduced, which effectively reduces the dryness of roadbed soil. shrinkage cracks; at the same time, it also has excellent frost resistance and prolongs the service life of the subgrade.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a method for treating roadbed hazards. Background technique [0002] As an important part of the entire transportation system, the subgrade directly bears the long-term effects of the superstructure load and the static and dynamic load of the vehicle, and the quality of the subgrade directly affects the driving speed and driving safety. Entering the 21st century, with the acceleration of the construction of high-speed railways, express passenger lines, heavy-duty railways, expressways, railway tunnels, road tunnels and urban subways in China, as well as the in-depth advancement of the national coastal strategy and the western development strategy, more and more More and more basic engineering constructions are located in saline soil areas. However, due to the high salt content of saline soil and engineering problems such as dissolution, salt expansio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C09K17/20E02D3/12C09K103/00
CPCC09K17/40C09K17/20E02D3/12C09K2103/00
Inventor 王玲
Owner 天津建设发展集团股份公司
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