A capillary blocking coating for slope protection and its preparation method and application

A technology of capillary blockage and slope protection, applied in the field of slope protection, can solve the problems of insufficient nutrition, high economic cost, entering the slope, etc., achieve strength and internal friction angle, easy and simple maintenance, and ensure air permeability Effect

Active Publication Date: 2021-12-10
GUANGZHOU HKUST FOK YING TUNG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) Consume a lot of soil resources
The covering layer requires the use of a large amount of natural soil or artificial soil materials, which will cause difficulties in obtaining soil and exacerbate the shortage of soil resources; in addition, a large amount of soil resources need to be transported and allocated from outside, which increases the construction cost of the covering layer
[0006] (3) High economic cost
According to the above situation, the use of a large amount of soil materials to construct the covering layer will inevitably require a large amount of soil materials to be transported outside, and long-distance transportation from other places will inevitably increase the project cost
[0007] (4) The covering material is not green and environmentally friendly, and the construction waste in the landfill cannot be fully utilized
[0009] (1) The compaction degree of vegetation soil is low, which affects the slope stability
In order to ensure soil permeability and plant growth, the compaction of slope vegetation soil is generally low (60-80%); however, the existence of such a low compaction vegetation soil layer will lead to a large amount of rainwater infiltration and Finally, it enters the slope body, thus affecting the stability of the slope
[0010] (2) Insufficient soil nutrition requires artificial fertilization
However, generally speaking, this kind of slope soil lacks nutrients, and it is difficult to ensure the growth of slope plants. Artificial fertilizers are needed to provide nutrients, and even provide soil amendments to improve the soil aggregate structure.

Method used

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  • A capillary blocking coating for slope protection and its preparation method and application
  • A capillary blocking coating for slope protection and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The invention provides a capillary retardation covering layer for slope protection, which includes a water storage green layer and a drainage layer sequentially arranged from outside to inside, the water storage green layer is composed of improved muck, and the improved muck includes engineering dregs Soil and biochar with a mass fraction of 5%-15%, the particle size of engineering dregs shall not exceed 10mm, the particle size of biochar shall not exceed 1mm, and the degree of compaction of the water storage green layer shall not be lower than 95%. The permeability coefficient is 1×10 -7 -1×10 -5 m / s, the thickness is 0.6-1 meter, and can plant vegetation; the drainage layer is mainly composed of recycled coarse aggregate with a particle size of 20mm-50mm, the compacted relative density is not less than 0.9, and the saturated permeability coefficient is not less than 1×10 -1 m / s, the thickness is 0.4-1 meter. A geotextile is arranged between the drainage layer and t...

Embodiment 2

[0067] Such as figure 1 As shown, the present invention provides a capillary retardation covering layer for slope protection, which includes a water storage green layer 1 and a drainage layer 2 arranged sequentially from the outside to the inside, the water storage green layer 1 is made of improved muck, The improved dregs include engineering dregs and biochar with a mass fraction of 10%, the particle size of engineering dregs is not more than 10mm, the particle size of biochar is not more than 1mm, and the compaction degree of water storage green layer 1 is 95% , the saturated permeability coefficient is 1*10 -6 m / s with a thickness of 1 meter. Shrub and grass plant communities are planted on the surface of the water storage green layer 1 . The drainage layer 2 is mainly composed of recycled coarse aggregate with a particle size of 25mm-40mm, a compacted relative density of 90%, and a saturated permeability coefficient of 5×10 -1 m / s, the thickness is 0.6 meters. A geotex...

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Abstract

The invention provides a capillary retardation covering layer for slope protection and its preparation method and application. The capillary retardation covering layer includes a water storage green layer and a drainage layer sequentially arranged from outside to inside, and the water storage green layer consists of The composition of improved dregs includes engineering dregs and biochar with a mass fraction of 5%-15%. The particle size of engineering dregs does not exceed 10mm, and the particle size of biochar does not exceed 1mm. Water storage greening layer The compaction degree is not less than 95%, and vegetation can be planted; the drainage layer is mainly composed of recycled coarse aggregate with a particle size of 20mm-50mm, and the relative compaction density is not less than 90%. The covering layer is laid on the slope body to reduce the infiltration of rainwater into the slope body, maintain a low moisture content of the slope body, that is, maintain a high soil suction, and thus maintain the stability of the slope.

Description

technical field [0001] The invention relates to the technical field of slope protection, in particular to a capillary retardation covering layer for slope protection and its preparation method and application. Background technique [0002] In recent years, with global warming, the frequency of rainstorms and the risk of floods have increased, landslide disasters have increased year by year, and have seriously threatened the safety of people's lives and property. The main cause of landslides is often the infiltration of rainwater, which will lead to an increase in the moisture content of the slope soil or an increase in the groundwater level, and the decrease in the shear strength of the soil will cause the slope to become unstable. In order to prevent rainwater infiltration, stone or concrete retaining walls and shotcrete armor are often used. Although this method can effectively prevent the infiltration of rainwater, it also brings serious economic and environmental proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20E03F5/00E03F5/10A01G22/00A01G24/10A01G24/12A01G24/20
Inventor 吴宏伟卢邦稳郭浩文倪钧钧平扬
Owner GUANGZHOU HKUST FOK YING TUNG RES INST
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