Measuring the Coefficient of Permeability of Sand during Liquefaction in Soil Column Tests

• Main Authors: Min-Chien Chu, 朱民虔
• Other Authors: Louis Ge
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/37114349615855885992

碩士 === 國立臺灣大學 === 土木工程學研究所 === 104 === The previous studies found that permeability was an important factor on excess pore water pressure dissipation and settlement after dynamic loading. Most researchers calculated the permeability during liquefaction from the settlement data based on consolidation theory assuming an upward flow through the soil during consolidation after liquefaction. The phenomenon of particle movements after liquefaction is better interpreted as sedimentation rather than consolidation. The solidification and consolidation theory may not be appropriate for considering the permeability after liquefaction. Therefore, a new experimental approach was proposed by Wang (2014), which combined the seepage and the liquefaction test on two different types of sand specimens to measure the permeability directly. This study was made to verify the behavior discovered by Wang, and to make the project more complete. The permeability of sand during liquefaction was about five times its initial value. From the test results, Darcy’s law was valid during liquefaction.