Numerical simulation of soil behaviour under vibration compaction

• Main Authors: Bo-huan Yang, 楊柏桓
• Other Authors: Chiang, Chine Chung
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/97351546485455693342

碩士 === 國立雲林科技大學 === 營建工程系碩士班 === 97 === The soil under vibration compaction during construction, or moving load by vehicle during transport, is possibly induced excess pore water pressure due to the large vertical cyclic stress. This may decrease the effective stress of soil and damage pavement. In this study the finite element software, the QUAKE/W module of Geo-Studio 2004 was used to simulate the high water table in soil layer during compaction. As the same amplitude of vibration, the maximum displacement and volume strain of soil decreased with the soil strength increased. Furthermore, the development of shear strain at high strength soil concentrated in the range of less than 2m deep, while at low strength soil was evenly outward distributed. In the case of vibration amplitude equal to 111kN, the pore pressure of the soil built up significantly and the effective stress of the soil decreased rapidly within 2m below the loading plate. When the amplitude was 55.5kN, the pore pressure slightly increased at the depth of 1m. In the other case, the pore pressure had no significant response.