Numerical assessment on the consolidation characteristics of clays from strain holding, self-boring pressuremeter test SCIE SCOPUS

Cited 16 time in WEB OF SCIENCE Cited 18 time in Scopus
Title
Numerical assessment on the consolidation characteristics of clays from strain holding, self-boring pressuremeter test
Author(s)
Jang, IS; Chung, CK; Kim, MM; Cho, SM
KIOST Author(s)
Jang, In Sung(장인성)
Publication Year
2003
Abstract
The strain holding test (SHT), part of the self-boring pressuremeter test (SBPT), has been effectively utilized to determine the horizontal coefficient of consolidation (c(h)). However, the commonly used procedure proposed by Clarke et al. [Proc. 7th Eur. Comp. Soil Mech., Brighton 2 (1979) 207.] can lead to an erroneous estimation of c(h), because of its simplified assumptions. This paper deals with numerical analyses based on realistic test conditions of the generally accepted testing procedure, and using the most commonly used type of pressuremeter. The effects of the pressuremeter geometry, the partial drainage during cavity expansion, and the cavity strain level for the holding test are investigated with the radial distribution of the initial excess pore pressure and its dissipation rate. Based on the results of the numerical analyses, the curve of the time factor for the 50% degree of consolidation (T-50) needed to estimate c(h) is proposed with a modification method for soil permeability. Comparisons are made,between c(h) values estimated from the SHT of the SBPT and those obtained from other in situ and laboratory tests performed at two sites in Korea. These results confirm the improved capability of the T-50 values proposed herein. (C) 2002 Elsevier Science Ltd. All rights reserved.
ISSN
0266-352X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/40527
DOI
10.1016/S0266-352X(02)00031-9
Bibliographic Citation
COMPUTERS AND GEOTECHNICS, v.30, no.2, pp.121 - 140, 2003
Publisher
ELSEVIER SCI LTD
Keywords
strain holding test (SHT); self-boring pressuremeter test (SBPT); coefficient of consolidation; distribution of initial excess pore pressure; time factor
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCI LTD
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