Abstract:
This paper discusses the results of a series of direct shear test that were undertaken toinvestigate the behaviour of organic soil with granular soil column. The tests focused oneffect of diameter of granular column in organic soil. Water content of the organic soil waskept constant for all tests. It was 125% that is liquid limit value. Four different column diameters were used. Sand used in the test is poorly graded and passing the No. 5 sieve andretaining on sieve No. 40 sieve. Shear strength properties of the samples were determinedfrom direct shear test. Loading was performed under undrained condition. Test results showed that ratio of sand column area to organic soil (S/O) are an important factor effecting shear strength properties of improved organic soil.
