Experimental Study of Static Disintegration on Unsaturated Soil

Abstract:

In order to explore the disintegration characteristics of compacted loess, through the unsaturated soil disintegration instrument by independently developed,conduct the soaking disintegration experimental study on remolded soil unsaturated samples,obtained a series of experimental results:①The curves can be divided into the slow disintegration, rapid disintegration and stabilization of disintegration in three stages，the degree of compaction and water rate impact on rapidly disintegrating stage;②When the degree of compaction is certain,the disintegration rate decreased with the water contented increasing,the decreased amplitude is increasing with the moisture content increased to18%,the disintegration characteristics disappeared with the moisture content increased to 22%;③When the initial moisture content is certain, the disintegration rate decreased with the degree of compaction increasing, The time significantly prolonged when the disintegration completed. the decreased amplitude is increasing with the degree of compaction increased to 95%,the disintegration characteristics basically disappeared. Based on the relationship of degree of compaction and the moisture content to void ratio, the thesis establishes the model between the disintegration rate and the effective porosity ratio,the formula can be used to calculate the disintegration rate of compacted loess.The specific conclusions are:①When the critical moisture content increased to 22%,the disintegration characteristics disappeared;②When the critical degree of compaction increased to95%，the disintegration characteristics also disappeared.

• Periodical: Applied Mechanics and Materials (Volumes 580-583)
• Pages: 68-72
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.580-583.68
• Online since: July 2014
• Authors: Nian Qin Wang, Qing Tao Wang*, Qian Xue, Xiao Ling Liu
• Keywords: Degree of Compaction, Disintegrating Test, Moisture Content, Unsaturated Loess

References

[1] Li Xi'an, Huang Runqiu, Peng Jianbing. Experimental research on disintegration of loess. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(S1): 3207-3213.

[2] Li Jiachun, Tian Weiping. Experiment of compacted loess disintegration. Journal of ChongQing Jiaotong University, 2005, 24(5): 74-77.

[3] Li Jiachun, Cui Shifu, Tian Weiping. Erosion characteristic of road slope and test of soil disintegration. Journal of Chang'an University(Natural Science Edition), 2007, 27(1): 23-26+49.

[4] Ma Xiao, Zhu Shoujun. Soil disintegration characteristics of terrace hedgerows in Loess hilly-gully areas. Journal of Northwest Forestry University, 2013, 28(4): 21-25.

[5] Wang Jing'e, Xiang Wei, Bi Renneng. Experimental study of influence of matric suction on disintegration of unsaturated remolded loess. Rock and Soil Mechanics, 2011, 32(11): 3258-3262.

[6] Yuan Kekuo, Dang Jinqian, Wang Zikui, Zhuo Li. Study on water character of compacted loess. Yangtze River, 2009, 40(20): 34-37.

[7] FULLER M L. Some unusual erosion feature in the loess of China[J]. Geographical Review, 1922, 12(4): 570-584.

DOI: 10.2307/208591

[8] WILSON G V ，PERIKETI R，FOX G A，et al. Seepage erosion properties contributing to streambank failure[J]. Earth Surface Processes and Landforms, 2007, 32(3): 447-459.

DOI: 10.1002/esp.1405

[9] BRIVOIS O ，BONELLI S，BORGHI R. Soil erosion in the boundary layer flow along a slope: a theoretical study[J]. European Journal of Mechanics(B/Fluids), 2007, 26(6): 707-719.

DOI: 10.1016/j.euromechflu.2007.03.006