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Jun 20, 2018
Study of the Coefficient of At-Rest Earth Pressure for Unsaturated Residual Soils with Different Weathering Degrees
Authors: Thaiana A. Silva [email protected], Regina T. Delcourt [email protected], and Tácio M. P. de Campos, Ph.D. [email protected]Author Affiliations
Publication: PanAm Unsaturated Soils 2017
Abstract
To evaluate the stress-strain behavior of soils under loading in engineering practice it’s usually required to know the natural, initial state of stresses acting in the soil mass. This is not an easy task when dealing with sedimentary soils. When it comes to tropical residual soils, this challenge is even greater due to variations in the weathering degree and soil profile moisture. The natural state of the soil is usually expressed by the coefficient of at-rest earth pressure (K0). To determine K0, three classes of methods can be used: correlation methods, in situ determination and laboratory tests. On this research, one rigid cell with a system of suction control was used to obtain values of K0 in laboratory tests, three samples of gneissic residual soil with different degrees of weathering were analyzed, and each one tested in three different levels of moisture. In general, the results attended the expected trend.
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© 2018 American Society of Civil Engineers.
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Published online: Jun 20, 2018
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Dept. of Civil and Environmental Engineering, Pontifícia Universidade Católica do Rio de Janeiro, PUC-Rio, Rio de Janeiro, RJ, Brazil. E-mail: [email protected]
Dept. of Civil and Environmental Engineering, Pontifícia Universidade Católica do Rio de Janeiro, PUC-Rio, Rio de Janeiro, RJ, Brazil. E-mail: [email protected]
Dept. of Civil and Environmental Engineering, Pontifícia Universidade Católica do Rio de Janeiro, PUC-Rio, Rio de Janeiro, RJ, Brazil. E-mail: [email protected]
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