The study of GCTS triaxial apparatus function and mixing sand void ratio

• Main Authors: Yu-Ting Cho, 卓玉庭
• Other Authors: 葛宇甯
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/11192560907624878502

碩士 === 國立臺灣大學 === 土木工程學研究所 === 102 === The shear strength of soil is a very important engineering parameter. There are many methods which can determine the it shear strength in the laboratory, including the direct shear test and the conventional triaxial test, etc. This study attempts to use the newly updated GCTS triaxial apparatus to carry out the drained and undrained compression triaxial tests on quartz sand. Before the tests, the function of the GCTS triaxial apparatus needs to be precisely calibrated. In order to make the GCTS triaxial apparatus easy to operate for future users, this study established procedures of calibration and operation. Also, the maximum and minimum void ratios of soil sample are important parameters to represent soil density. The relationship between particles and particles are mainly influenced on the result. The ASTM D 4253 and ASTM D 4254 are different from the Japanese Industrial Standard (JIS) A1224. If different specification is used to obtain the maximum and minimum void ratio, the trend of the maximum and minimum void ratio curves are very similar for both ASTM and JIS specifications. However, the value of the maximum void ratio curve by ASTM specification is different that that of JIS method. The curve are generally in parallel to each other.