Influence of different fine-grained soil content and saturation state on shear behavior of sandy soil

Abstract

In order to study the shear characteristics of mixed soils with different fine-grained soil contents under the conditions of saturation and optimal water content, a light compaction test was carried out on the original soil. The content is 0%, 5%, 10%, 20%, 60% and 80% respectively. The same remolded soil is set in two States of saturation and optimal water content. The shear strength test of twelve kinds of remolded soil is carried out. The following conclusions are drawn from the test: under the same vertical stress, the shear strength of remolded soil with the same water content decreases with the increase of fine-grained soil content. The internal friction angle and cohesion coefficient of the remolded soil with the optimal water content are larger than those of the plastic soil. With the same amount of fine grained soil, the internal friction angle and cohesion coefficient of the remolded soil with optimal water content are larger than those of the saturated remolded soil. The shear strength of remolded soil in the saturated state is less than that in the optimal water content state.