Experimental study on the coefficient of lateral pressure at rest for calcareous soils |
| |
Authors: | Xing Wang Xin-Zhi Wang |
| |
Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, China;2. University of Chinese Academy of Sciences, Beijing, China |
| |
Abstract: | AbstractThe coefficient of lateral pressure at rest (k0) is a key parameter required to determine the horizontal stress distribution on subsoils. In this paper, k0 was measured from consolidation test for calcareous and siliceous sand, and the effect of water contents on k0 of calcareous sand was also discussed. Comparison of k0 values measured and calculated based on empirical formulas were carried on. Results indicated that (1) the reduction rate of k0 for calcareous sand with an increase in relative density was less than that of siliceous sand. The k0 at low water content was generally smaller than that of siliceous sand, and it was similar to that of siliceous sand for high-water content; (2) the k0 of calcareous sand increased with increasing initial water content initially, and then decreasing. However, the magnitude of variation was small. So the impact of water content on the k0 of calcareous sand was limited; (3) the formulas proposed by Abdelhamid and Krizek (1976 Abdelhamid, M. S., and R. J. Krizek. 1976. At-Rest Lateral Earth Pressure of Consolidating Clay. Journal of the Geotechnical Engineering Division 102 (7): 721–738. Google Scholar]) for estimation of the k0 was highly applicable to calcareous fine sand.- Highlights
The k0 of calcareous fine sand was investigated. The k0 of calcareous and siliceous sand were compared. Shape parameters of sand particles for calcareous and siliceous sand were analyzed. Effects of related density and initial water content on the k0 were discussed, respectively. The applicability of various empirical formulas for calculating k0 of calcareous fine sand was evaluated.
|
| |
Keywords: | Coefficient of lateral pressure at rest calcareous sand siliceous sand empirical formula |
|
|