ESTIMATING METHOD OF SHEARING RESISTANCE PARAMETERS OF COMPACTED GRAVELLY SOILS IN FIELD BY LABORATORY TESTS

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  • 室内試験にもとづく現場締固め礫質土のせん断強度定数推定法
  • シツナイ シケン ニ モトズク ゲンバ シメカタメ レキシツド ノ センダン

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It is not easy to know shearing resistance parameters cd and ∅d of compacted gravelly soils in field because of difficulty in getting the undisturbed samples for the laboratory test and also in performing the in situ shear test. In order to estimate shearing resistance parameters cd and ∅d of compacted gravelly soils in field from shear test of compacted soils in laboratory, the authers carried out shear tests (∅=150mm, h=100mm) with change of the gradation and the maximum grain size of compacted soils, and compared with the results of direct shear test in field using the 300mm×300mm×180mm shear box. From a series of laboratory tests using Samples I (cut off larger particles simply) and Samples II (replaced larger gravel-particles with smaller gravel-particles of the same weight), it is known that in situ strength parameters cd and ∅d of gravelly soils can be estimated reasonably by laboratory tests with a few kinds of samples I.

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