基于应变能密度映射的黄土结构性参数研究

doi:10.13722/j.cnki.jrme.2021.0244

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Abstract The destruction of natural soils occurs when the external loading energy is greater than the limit deformation energy of the soils，thus，a structure parameter in terms of the deformation energy is more suitable to describe the essential characteristic of soil structure. The confined compression tests were conducted on compacted remolded and undisturbed loess samples with various water contents and dry densities from the Taohua Hill，Yan¢an city. Test results suggest that there is an obvious piecewise linear relationship between the void ratio e and the vertical pressure P in -lgP bi-logarithmic coordinate system. Based on this，a structure parameter in terms of the mapping energy was derived according to the strain energy density theory，and further extended into complex loading conditions. Moreover，the verification of the proposed parameter was carried out based on the oedometer tests on remolded and undisturbed soils with different water contents，dry densities，burial depths and particle size distributions，as well as the isotropic compression tests with various water contents. The results show that the proposed parameter has a clearly physical meaning and is able to represent the soil structure quantitatively and accurately under diverse experimental conditions.

Key words： soil mechanics loess structure parameter confined compression test mapping of strain energy density

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	Articles by authors
	LV Longlong1
	LIAO Hongjian1
	FU Yingpeng1
	XIA Longfei1
	2
	LENG Xianlun3

Cite this article:

LV Longlong1,LIAO Hongjian1,FU Yingpeng1, et al. Study on structural parameter of loess based on the mapping of the strain energy density#br#[J]. , 2022, 41(2): 399-411.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0244 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I2/399

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