Abstract The earth pressure coefficient at rest K 0 is a key mechanical parameter of soil, so studying K 0 of coarse grained soil has important theoretical value and practical significance in geotechnical engineering works. To investigate the influence factors of K 0 for coarse grained soil, a series of K 0 compression tests for a sandy gravel and a rockfill were conducted by utilizing a newly-developed large-scale K 0 device. The test data show that there is a negative linear correlation between K 0 and initial relative density D r0. The data also show that the increasing vertical effective stress σ′ v , will decrease the K 0 value, and the effect of low σ′ v , on the K 0 is more obvious. Large-scale consolidated drained (CD) triaxial tests for soils used for K 0 compression test were carried out, and according to the data of CD triaxial tests and K 0 compression tests the correlation between K 0 and effective internal friction angle ϕ′ is established. Based on the result, an empirical equation is presented. This equation can be used to predict the K 0 value of the coarse grained soil under a random consolidation condition and stress condition according to the value of ϕ′. Furthermore, this empirical formula is verified by K 0 compression tested data.
Experimental Study on Influence Factors and Empirical Formula of K 0 for Coarse Grained Soil
KSCE Journal of Civil Engineering ; 23 , 8 ; 3305-3314
2019-07-17
10 pages
Article (Journal)
Electronic Resource
English
Experimental Study on Influence Factors and Empirical Formula of K0 for Coarse Grained Soil
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