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Title: |
Experimental Study on the Moisture Migration of Reclaimed Soil |
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Source: |
International Workshop on Diffuse Pollution-Management Measures and Control Technique (IWDCT 2010 E-BOOK)
(pp 256-259)
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Author(s): |
Qing-qing Li, School of Earth and Environment Science, Anhui University of Science and Technology,
Guang-quan Xu, School of Earth and Environment Science, Anhui University of Science and Technology,
Yao-ping Chen, School of Earth and Environment Science, Anhui University of Science and Technology,
Yu-qing Zhao, School of Earth and Environment Science, Anhui University of Science and Technology, |
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Abstract: |
Based on the soil structure of reclamation test filed, the three-layer model of soil-fly ash-coalgangue was designed. On the basis of analyzing the physical and chemical properties of filling materials, themoisture retention curves of soil, fly ash and coal gangues were calibrated by a suction plate instrument. Accordingto the conditions of simulating atmospheric precipitation and evaporation, the moisture variationcharacteristics of reclaimed soil can be obtained. The test results show that the matric potential of filling substancesare inverse proportion to the corresponding moisture content, and there are significantly differences inmoisture content characteristic curves among soil, fly ash and coal gangue. With the increasing depth, the effectof evaporation on the moisture content of soli become weak gradually and the reclaimed soil has discontinuouschange. Especially, the fly ash layer has relatively strong ability to hold moisture. The main factorsthat affect the moisture distribution are porosity and particle size of filling material, as well as evaporation effect.
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