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http://dx.doi.org/10.12814/jkgss.2014.13.4.033

A Study on the Consolidation Characteristics Using the Constant Strain Rate Test of Remolded Gwangyang Marine Clay  

Jang, Joeng-Min (Department of Rural & Boisystems Engineering, Chonnam National University)
Kim, Jin-Young (Department of Rural & Boisystems Engineering, Chonnam National University)
Joeng, Woon-Ki (Department of Rural & Boisystems Engineering, Chonnam National University)
Choi, Jin (Department of Rural & Boisystems Engineering, Chonnam National University)
Jin, Young-Sik (Department of Rural & Boisystems Engineering, Chonnam National University)
Kang, Kwon-Soo (Department of Civil Engineering, Seonam University)
Baek, Won-Jin (Department of Rural & Boisystems Engineering, Chonnam National University)
Lee, Kang-Il (Department of Civil Engineering, Dae-Jin University)
Publication Information
Journal of the Korean Geosynthetics Society / v.13, no.4, 2014 , pp. 33-43 More about this Journal
Abstract
Recently, the case to construct the structure on the soft clayey ground has increased and in order to the reduction of the cost of construction and maintenance on the social infrastructure facilities we have been trying to improve the soft clayey ground using the existing methods such as the pre-loading method and the vertical drain method. Like this, when various ground improvement methods are applied on the soft clayey ground, a long-term consolidation settlement will be key issue due to low permeability coefficient of cohesive soil. According to existing research results that relate to the consolidation settlement, the loading periods for existing the standard consolidation test (Oedometer test) to obtain the consolidation parameters are needed for minimum ten days or more. Therefore, in this study, the standard consolidation test (24 hours step-loading) and constant strain rate consolidation test changed by strain rate was performed using the remolded marine clay on Gwangyang bay composed of a soft clayey ground of the south-west coast. From the laboratory test results, the characteristics of compression, strain-effective stress relations by constant strain rate and the variation characteristic of the pore water pressure by different of loading speed and the relation between consolidation parameters and constant strain rate are compared and analyzed.
Keywords
Consolidation; Ground improvement; Constant strain rate; Loading periods;
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  • Reference
1 Aboshi, H. and K. and Maruyama, S., (1970), "Constant loading Rate Consolidation Test", Soils and Foundations, Vol.10 pp.43-56.   DOI
2 Annual Book of ASTM (1989), "Standard test method for one-dimensional consolidation of using controlled-strain loading", American Soc. for Testing and Materials, Philadelphia, D4186-89. pp.1-5.
3 ASTM D 4186-89, (1989), "Standard Test Method for One-dimensional Consolidation Properties of Soils using Controlled-Strain Loading", American Soc. for Testing and Materials, Philadelphia.
4 Bang, E., (1997), The Experimental Study on the Consolidation Characteristics of Ooni at Han-River due to Constant Strain Rate of Consolidation Test, Master thesis of Su-won University.
5 Casgrande, A. (1936), "The determination of the pre-consolidation load and its practical significance", Proceedings, 1st International Conference on Soil Mechanics and Foundation Engineering, Cambridge, Vol.3, pp.60-64.
6 Crawford, C. B., (1964), "Interpretation of the consolidation test", J. SMFD., ASCE., SM 5, pp.87-102.
7 Crawford, C. B., (1988) "On Importance of Rate of Strain in the Consolidation Test", Geotechnical Testing Journal, Vol.11, No.1, pp.60-62.   DOI
8 Gorman, C. T., Hopkins, T.C.,Deen, R. C. and Drnevich, V.P., (1978) "Constant Rate of Strain and Controlled Gradient Consolidation Testing", Geotechnical Tsting Journal, Vol.1, No.1, pp.3-15.   DOI
9 Jung, N., (2002), "The Study on the selection of the strain rate for the constant rate-of-strain consolidation test by applying several soil indexes, Master thesis of Daejeon University.
10 Kim, S., (2001), A study on the Consolidation Charateristics of Soft Clay by CRS and Conventional tests, Master thesis of Chosun University.
11 Lee, J., (1986), The Characteristics of Constant Rate of Strain Consolidation on the Nakdong River Soils, Master thesis of Dong-A University.
12 Lee, N., Lee, D., Chung, S. and Yoo, G., (1996), "Characteristics of Constant Rate of Strain Consolidation on Yang-San clay", Korea Geotechcical Society of '96 National Conference, pp.267-276.
13 Oh, I., (2002), A Study on Consolidation Characteristics of Recomposed Clay by CRSC and Standard Consolidation Tests, Master thesis of Chonnam National University.
14 Yoshikuni, H., (1991), "An Interpretation of Consolidation and Compression Curves of Soft Clayey Soils (IV), Procedings of Japanese Geotechnical Society, No.3, pp.354-355.
15 Smith, R. E. and Wahls, H. E. (1969), "Consolidation under constant rate of strain", J. SMFD., ASCE., SM2, pp.519-539.
16 Wissa, A. E. Z., Christian, J. T., Davis, E. H. and Heiderg, S., (1971), "Consolidation at Constant Rate of Strain", J. SMFD, ASCE, SM 10, pp.1393-1413.
17 Yoshikuni, H., (1990), "An Interpretation of Consolidation and Compression Curves of Soft Clayey Soils (I), Procedings of Japanese Geotechnical Society, No.3, pp.307-310.
18 Yoshikuni, H. and Kusakabe, O., Hirao, T. & Ikegami, S., 1994. "Elasto-viscous modeling of time dependent behaviour of clay." Proc. of the 13th ICSMFE, New Delhi, Vol.1, pp.417-420.