含水量对泥石流物源流变特性影响试验研究

doi:10.13722/j.cnki.jrme.2015.0997

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Abstract

Soil material mechanical characteristics are affected by water，which is the intrinsic factor of debris flow initiation. In order to investigate the affect and demonstrate the debris flow initiation mechanism，an apparatus named Vane shear rheomete which was improved by the four-bladed vane and used to carry out the loading-unloading test on the fine granular soil(d≤1m m). In the test，the relationships between shear stress and strain have been checked as in 5 levels of water content. The test data reveal that the strain of soil material converge to a certain value under low water content and the test loading，and the value increases as the water content increasing. While the water content reaches a certain level (28.8% in the test，named initiation level)，the strain will diverge and eventually result in initiation. Those results mean that the debris flow initiation results from the rehology with the high water content. It is found that the rehology can be described by an improved Bingham model which was promoted. The model parameters were calculated by the test data and coherence between model and test data were checked，which shows the test and model can be used to demonstrate the debris flow initiation.

Key words： engineering geology debris flow Vane shear rheometer strain improved Bingham model

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	Articles by authors
	LIU Zhonggang1
	2
	LIU Xiaoli1
	WANG Enzhi1
	WANG Fang1
	WEI Tianqing2
	GAO Chuang2

Cite this article:

LIU Zhonggang1,2,LIU Xiaoli1, et al. STUDY OF RHEOLOGICAL CHARACTERISTICS AFFECTED BY WATER CONTENT WITH SHEAR TEST[J]. , 2015, 34(S2): 3830-3836.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0997 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/3830

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