Compound stabilizing method for silty soil in Yellow River flooded areas

Abstract

The invention discloses a compound stabilizing method for silty soil in Yellow River flooded areas and belongs to the technical field of road construction materials and road building. The method can be realized through reasonable mix proportion of a sodium methyl silicate aqueous solution, polyacrylamide, pulverized coal, lime and silty soil. According to the method, not only can the cost be lowered, but also the non-laterally confined compressive strength and anti-penetrability performance of the silty soil can be improved. In addition, the method also has the advantages that the functions of resisting capillary water and preventing rise of the capillary water can be achieved, and the stability property of the water can be enhanced so as to prevent the damage of roadbed and road surfaces; and the maintenance cost can be lowered, the road service life can be prolonged, and the like.

Description

technical field

[0001] The invention relates to a new method for improving and enhancing the properties of silt soil in yellow flooding areas, and belongs to the technical field of road construction materials and road construction. Background technique

[0002] The silt soil in the Yellow Flooding Area is a kind of soil unique to the banks of the Yellow River and surrounding areas. It has the characteristics of loose texture, easy moisture absorption, low plasticity index, and good permeability. The silt soil in the yellow flood area belongs to sandy silt soil. The capillary water of silt soil rises quickly and has a large height. When the temperature is negative, the water accumulates seriously. After the water increases, the soil structure is easily lost, and subsidence deformation and longitudinal cracking occur. , Mud, freeze-thaw, collapse and other damage. The alluvial and alluvial plain of the Yellow River is in the seasonally frozen area, the groundwater level is re...

Examples

Embodiment 1

[0027] Mix 600g of air-dried silt soil, 300g of fly ash, 60g of lime, 10g of polyacrylamide with a molecular weight of 3 million, and 30g of sodium methyl silicate aqueous solution with a mass percentage of 15%, and mix them evenly. 203.1g, weighed three parts, respectively made into Φ50×50mm test blocks, sealed for standard health preservation. Using a computerized constant stress pressure testing machine, load the specimen continuously and uniformly at a speed of 0.05kN / s until the specimen is destroyed, and record the failure load. The measured 7d unconfined compressive strength is 1.59MPa, and the permeability coefficient of the formula sample tested according to the aforementioned experimental method is 8.84×10 -5 .

Embodiment 2

[0029] Mix 700g of air-dried silt soil, 200g of fly ash, 60g of lime, 10g of polyacrylamide with a molecular weight of 3 million, and 30g of sodium methyl silicate aqueous solution with a concentration of 15% by mass, and stir evenly. Each piece is 203.1g, and three parts are weighed, respectively made into Φ50×50mm test blocks, sealed for standard health preservation. Using a computerized constant stress pressure testing machine, load the specimen continuously and uniformly at a speed of 0.05kN / s until the specimen is destroyed, and record the failure load. The measured 7d unconfined compressive strength is 1.56MPa, and the permeability coefficient of the formula sample tested according to the aforementioned experimental method is 8.92×10 -5 .

[0030] Depend on figure 1 It can be seen that for the same mix ratio, as the curing time increases, the required failure load increases. For different mix proportions, the failure load required for the stabilization of silt soil b...

technical field

[0001] The invention relates to a new method for improving and enhancing the properties of silt soil in yellow flooding areas, and belongs to the technical field of road construction materials and road construction. Background technique

[0002] The silt soil in the Yellow Flooding Area is a kind of soil unique to the banks of the Yellow River and surrounding areas. It has the characteristics of loose texture, easy moisture absorption, low plasticity index, and good permeability. The silt soil in the yellow flood area belongs to sandy silt soil. The capillary water of silt soil rises quickly and has a large height. When the temperature is negative, the water accumulates seriously. After the water increases, the soil structure is easily lost, and subsidence deformation and longitudinal cracking occur. , Mud, freeze-thaw, collapse and other damage. The alluvial and alluvial plain of the Yellow River is in the seasonally frozen area, the groundwater level is re...

Examples

Embodiment 1

[0027] Mix 600g of air-dried silt soil, 300g of fly ash, 60g of lime, 10g of polyacrylamide with a molecular weight of 3 million, and 30g of sodium methyl silicate aqueous solution with a mass percentage of 15%, and mix them evenly. 203.1g, weighed three parts, respectively made into Φ50×50mm test blocks, sealed for standard health preservation. Using a computerized constant stress pressure testing machine, load the specimen continuously and uniformly at a speed of 0.05kN / s until the specimen is destroyed, and record the failure load. The measured 7d unconfined compressive strength is 1.59MPa, and the permeability coefficient of the formula sample tested according to the aforementioned experimental method is 8.84×10 -5 .

Embodiment 2

[0029] Mix 700g of air-dried silt soil, 200g of fly ash, 60g of lime, 10g of polyacrylamide with a molecular weight of 3 million, and 30g of sodium methyl silicate aqueous solution with a concentration of 15% by mass, and stir evenly. Each piece is 203.1g, and three parts are weighed, respectively made into Φ50×50mm test blocks, sealed for standard health preservation. Using a computerized constant stress pressure testing machine, load the specimen continuously and uniformly at a speed of 0.05kN / s until the specimen is destroyed, and record the failure load. The measured 7d unconfined compressive strength is 1.56MPa, and the permeability coefficient of the formula sample tested according to the aforementioned experimental method is 8.92×10 -5 .

[0030] Depend on figure 1 It can be seen that for the same mix ratio, as the curing time increases, the required failure load increases. For different mix proportions, the failure load required for the stabilization of silt soil b...

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