Hydraulic sand fill method is the most widely adopted land reclamation method in west Taiwan. In this study, the influence of different fines content on shear wave velocity of reclaimed soil is discussed. The relationship between SPT-N values and shear wave velocity of reclaimed soil in Mai-Liaw region (Taiwan) is evaluated. As shown in the results, for "critical shear wave velocity void ratio" (efc) with 10% of fines content, there exists a maximum shear wave velocity. the fines content exceed 10%, the shear wave velocity would decrease as the fines content increases. The relationships between shear wave velocity, SPT-N value and soil depth is discussed. The results can be presented for soil property evaluation in land reclamation area and coastal area.
In early study, the elastic wave transmission theory was applied in exploration of ground stratum and earth crust. Richart (1962) was the first to adopt elastic wave transmission theory into geotechnical engineering. The elastic wave can be separated into surface wave and real wave. Where, the shear wave velocity in real waveform was widely adopted to discuss the properties of soil. As shown in the basic soil mechanics, the soil properties are related with the void ratio of soil. Therefore, analysis of shear wave velocity and void ratio is important for safety evaluation in earthquake region. In this paper, the relationships between shear wave velocity (adopted by resonant column test), and engineering parameters are presented, and the influences of different fines content on shear wave Velocity of reclaimed soil are discussed. Based on the shear wave velocity measured in the reclamation site (Mai-Liaw region in west Taiwan), the differences between the shear wave velocity measured in laboratory and those measured in the reclamation site are illustrated in this paper.
