Experimental Studies on the Mechanical Behaivior of the Mixed Soils with Mudstone-soil and Sandtone-soil (1)

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  • 島尻層混合土の力学的特性に関する研究(第1報)
  • 島尻層混合土の力学的特性に関する研究-1-
  • シマジリソウ コンゴウド ノ リキガクテキ トクセイ ニカンスルケンキュウ 1

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Shimajiri Formation, which mainly consists of mudstone (Clayey soft rock or soil) and sandstone (sandy soft rock or soil), is widely distributed over the area of middle and southern Okinawa Island: Though, each of these rocks (or soils) is not available for the soil engineering purpose except for the only back fill and damping materials of reclamation, because of its deficiency in the engineering properties being disturbed. The experimental investigations into the improvement of their mechanical properties by mixing those two soils are undertaken in order to apply for the earth structures (fills, embankments etc.). Also, those studies are referred to the study of the engineering behavior of sand, clay and intermediate soil, respectively. The present paper discribes the strength characteristics of those compacted mix-soils by the results of unconfined, and triaxial compression tests. It's shown that the mechanical behavior of the soils are much affected by the mixing ratio of the two soils, consequently, their grain size compositions. This means that the clay content <or silt content and sand content> is somewhat an index of the mechanical properties, and the availability (or applicability) of test procedure depends on the composition of the soil used.

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