E3S Web Conf.
Volume 92, 20197th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow 2019)
|Number of page(s)||6|
|Section||Geomaterial Behaviour: Compressibility and Time-dependency|
|Published online||25 June 2019|
Experimental Study on Relationship Between Critical State Line and Zero Creep Volume Change Zone in Engineered Silty Sand
Kyung Hee University, Dept. of Civil Engineering, 1732 Deogyeong-daero, Yongin-si, Republic of Korea
2 Korea Institute of Construction and Building Technology, Republic of Korea
3 Seoul National University, Dept. of Civil and Environmental Engineering, Republic of Korea
* Corresponding author: email@example.com
Volume change during creep is one of the important factors to explain various time-dependent problems such as the pile set-up effect. Park  and Park et al.  experimentally measured creep volume characteristics under various stress conditions using engineered silty sand obtained from weathered granite soil in Korea. They found that a zero-creep volume change zone (ZCVZ) exists on the e-log p' plane. If the void ratios at the beginning of the creep are above the ZCVZ on the e-log p' plane, the volume decreases during creep; if they are below the ZCVZ, the volume increases during creep. In this study, a series of simple critical state (CS) tests which can simply determine the critical state parameters in sandy soils were performed to estimate the critical state line (CSL) and compared with ZCVZ. In addition, the CSL obtained using the method proposed by Santamarina and Cho  was compared with those obtained by the triaxial test. The CSL for Jumunjin sand and engineered silty sand is close to ZCVZ. Therefore, the CSL can be used as a reference line to determine the volume change pattern by creep.
© The Authors, published by EDP Sciences, 2019
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