[Oral Presentation]Study On The Characteristics And Laws of Soil Surface Crack Development Under Drying-Wetting Cycles
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[Oral Presentation]Study On The Characteristics And Laws of Soil Surface Crack Development Under Drying-Wetting Cycles

Study On The Characteristics And Laws of Soil Surface Crack Development Under Drying-Wetting Cycles
ID:414 Submission ID:376 View Protection:ATTENDEE Updated Time:2024-05-19 15:21:39 Hits:537 Oral Presentation

Start Time:2024-05-31 16:10 (Asia/Shanghai)

Duration:15min

Session:[S9] Environmental Pollution Control and Ecological Restoration » [S9-2] Afternoon of May 31st

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Abstract
自然条件下干湿循环引起的土壤表面裂缝对地表污染物的输送具有重要影响。对改造粉土和改造黑土两个土壤样品进行了10次D-W循环试验,水分含量和土壤样品类型各不相同。结果表明,土样类型是影响裂纹发展的关键因素,高粘性土的裂纹发展更为突出。此外,含水量的增加导致总裂缝面积、裂缝比例、平均长度和最大长度以及宽度增加,而裂缝条数量和总长度减少。循环次数对裂纹发展也有显著影响,循环次数越多,裂纹比例越大,裂纹条数量越大,最大宽度越大,最大长度和平均长度越小。基于SEM的观测表明,在D-W循环下,内部孔隙结构的调整与表面裂纹发展密切相关,凸显了孔隙结构变化是裂纹演化的重要因素。研究结果可为土壤污染防治提供一定参考。
Keywords
drying-wetting cycles; cracks; evolution patterns; quantitative analysis; microstructure
Speaker
Lin Sun
China University of Mining and Technology

Submission Author
Lin Sun 中国矿业大学
Wanxu Wang 中国矿业大学
Jishan Xu 中国矿业大学
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