原状非饱和风积土结构性参数与强度指标关系的试验研究

doi:10.3969/j.issn.1002-0268.2016.01.007

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Abstract Triaxial shear experimental research is conducted on intact unsaturated aeolian soil, remolded unsaturated aeolian soil, and intact saturated aeolian soil under three different dry densities and seven different moisture contents using the true triaxial apparatus TSW-40. Moreover, the relationship between structural parameters and structural strength indexes of intact unsaturated aeolian soil is explored. Test results show a negative correlation between structural parameter ratio m_ε/m_ε0 and moisture content w but a linear positive correlation between structural parameter ratio m_ε/m_ε0 and dry density ρ_d. The functional relationships between the ratio of structural strength indexes tan φ/tan φ₀ and c/c₀ and structural parameter ratio m_ε/m_ε0 are all a quadratic function. The quantitative index or value of synthetic structural state P_cs, which reflects the effect of different factors on the structural characteristics of intact unsaturated aeolian soil synthetically, is constructed. This paper considers the strength indexes of intact aeolian soil under natural moisture contents, so that the shear strength indexes of intact unsaturated aeolian soil under discretional structural state can be calculated. This research provides a novel method for the practical use of shear strength of intact unsaturated aeolian soil for aeolian soil engineering in the west of Liaoning Province.

Key words： road engineering intact unsaturated aeolian soil dry density moisture content strain-CSP structural strength index

Received: 22 December 2015

Fund:Supported by the National Natural Science Foundation of China (No.50978131);the Specialized Research Fund for Doctoral Program of Higher Education (No.20112121110004)

Corresponding Authors: LI Qing-wen,E-mail address:lgjzlqw@163.com E-mail: lgjzlqw@163.com

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LI Qing-wen,ZHANG Xiang-dong,ZHANG Jin. Experimental Research on Relationship between Structural Parameters and Structural Strength Indexes of Intact Unsaturated Aeolian Soil[J]. Journal of Highway and Transportation Research and Development, 2016, 10(2): 8-15.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/10.3969/j.issn.1002-0268.2016.01.007 OR http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/Y2016/V10/I2/8

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