This study dealt with colored bottles is rapidly desire to find out the effective uses, because of abolishing to reclamations far from recycling. In this study, we aim at the effective use of waste glass fragment produced in breaking the colored bottles. Firstly the basic mechanical properties of waste glass fragment are examined from the permeability and compaction tests to apply it to soft clay layer by improvising method. Secondly the bearing capacities of waste glass fragment is made clear by modified CBR, and evaluate the application to base course material. The laboratory and field tests were carried out to evaluate the heat properties of these materials. Through this study, we examined as a good base course material not to cause heat island phenomena, namely gentle to environment of sidewalk construction.

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Case study into the stability of a sand dune in northern Kyoto is described in this paper. The depositional circumstance of the dune was examined by performing in-situ tests such as SPT, surface-wave seismic survey and density profiling with the basic properties manifested in the laboratory. The strength characteristics were obtained from various tests such as the measurement of critical height associated with the vertical excavation, the metric suction measurement, direct shear box test, bender element test etc. The stability of the slope was examined by means of limit equilibrium analysis by assuming the slip surface being parallel to the slope surface. It is manifested that the sand dune comprises loosely deposited clean sand exhibiting no interparticle bonding. The existing suction with a few kPa contributes greatly to the stability of the sand slope.

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Soil- water coupled analysis of the vacuum consolidation were performed using SYS Cam Clay model, assuming the dredged soil, moisture content of which is high, to be the highly structured soils. The soil void is reduced with the decay of soil structure when the vacuum pressure is loaded under the low effective stress level. As for this consolidation method, the soils are improved by the increase of the effective stress along the soil deep area. Outside the improved area, a shear strain occurred from deep area. From generation of shear strain, a possibility of making the outer foundation heterogeneous from the improved region is being shown. In this paper, it is explained both field cases and numerical simulations. A field and simulation are well similar about settlement, surface shape and lateral displacement. And the possibility of the deformation prediction using FEM was shown.

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