In order to understand the anisotropy conditions in soil layers beneath structure foundations, a series of dynamic triaxial tests have been performed to evaluate the liquefaction strength and dynamic loading induced deformation. In this study, the soil samples are adopted from Yun-Lin nearshore area of west Taiwan. The specimens are prepared by moist tamping method with initial relative density of Dr = 55% and different consolidation stress ratios (as Kc=l.0, 1.5, 2.0, 2.5, 3.0). Ottawa sand is also adopted as test sample for comparison under same test conditions. As shown in the test results, for Yun-Lin sand under different double amplitudes (DA=I%, 3%, 5% and 10%), the liquefaction strength would decrease as the consolidation stress ratio increases tendency. For lower consolidation ratio (as Kc < 1.5), the liquefaction strength is very closely, and the influence of Kc has decreasing tendency under large amplitude strain. By use of normalizing the cyclic stress ratio, the relationship of liquefaction strength under different consolidation ratios is given with satisfy results. As for Ottawa sand, the results have different tendency. Under same condition and constant Kc, the liquefaction strength of Ottawa sand is higher than the liquefaction strength of Yun-Lin sand. Based on the one-dimensional consolidation theory, the volumetric strain and vertical settlement of reclaimed soil are evaluated. The vertical settlements of Ottawa (C-109) sand and Yun-Lin sand are decrease as the consolidation stress ratio increases. This result is very useful to predict the liquefaction potential analysis and settlement for planning, design and related research of reclamation engineering. Key Words: Reclaimed soil, Consolidation stress ratio, Liquefaction strength, Settlement.
Hydraulic sand fill is one of the most important reclamation method in West Taiwan. The reclaimed land is important for the development of industrial estate.
