The Indoor Model Test on the Characteristic of Expansive Soil Slope under Climatic Conditions

An indoor model of expansive soil filling slope is tested in Pingdingshan city, Henan province, China. Using temperature and humidity detectors, earth pressure cells and so on, the static evaporation - rainfall infiltration cycles are tracked and monitored in the climate condition. The study suggest...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2019-09, Vol.304 (3), p.32056
Main Authors: Zhai, Ju-yun, Ma, Ming-jiang, Hao, Xiao, Zhao, Jin, Zhao, Yu, Yang, Qi-qi
Format: Article
Language:English
Subjects:
Air flow
Air temperature
Atmospheric temperature
Climatic conditions
Condition monitoring
Convection
Earth pressure
Evaporation
Expansive soils
Heat transfer
Humidity
Infiltration
Model testing
Moisture content
Permeability
Pressure
Pressure cells
Rainfall
Rainfall infiltration
Soil conditions
Soil erosion
Soil improvement
Soil permeability
Soil stresses
Soil temperature
Soil testing
Soil water
Surface temperature
Water content
Water depth
Water loss
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Summary:An indoor model of expansive soil filling slope is tested in Pingdingshan city, Henan province, China. Using temperature and humidity detectors, earth pressure cells and so on, the static evaporation - rainfall infiltration cycles are tracked and monitored in the climate condition. The study suggests that atmospheric temperature is the direct cause of soil temperature. Due to the convection heat transfers, the surface temperature of the soil changes rapidly, and the temperature change of the heat transfer to the interior has a hysteresis phenomenon. Under surface evaporation conditions, the greater the depth is, the smaller the change range is in water content. Water loss rate is related to soil, air flow, temperature and humidity, cracks, soil water holding capacity, permeability and other factors. The change of stress in the expansive soil slope is the result of the joint action of soil water content, nature and climatic conditions. Due to the early erosion of rainfall, soil pressure is obviously attenuated. The soil pressure is on the rise due to the effects of rainfall infiltration and expansion force in the late rainfall. In the engineering, the key to prevent and cure engineering disaster of expansive soil is to improve the deformation characteristics and reasonable drainage of expansive soil.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/304/3/032056