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Journal of Ocean University of China : Volume 8, Issue 2, June 2009

Journal of Ocean University of China : Volume 8, Issue 1, March 2009

Journal of Ocean University of China : Volume 7

Journal of Ocean University of China : Volume 6

Journal of Ocean University of China : Volume 5

Journal of Ocean University of China : Volume 4

Journal of Ocean University of China : Volume 3

Journal of Ocean University of China : Volume 2

Journal of Ocean University of China : Volume 1

Characteristics and causes of the preconsolidation stress of soils in the Yellow River Delta

Content Provider	Springer Nature Link
Author	Yang, Xiujuan Jia, Yonggang Liu, Hongjun Shan, Hongxian
Copyright Year	2009
Abstract	Preconsolidation stress (σ′$_{ P }$) is the maximum effective stress that a soil has suffered throughout its life. From a geotechnical point of view, pre-consolidation stress has great importance because it separates elastic and reversible deformations from inelastic and only partially irreversible deformations and marks the starting point of high compressibility. In this study we calculated the preconsolidation stress for 72 undisturbed soil samples from the Yellow River Delta, using the oedometer test and applying the method proposed by Casagrande. The results showed that the over-consolidation ratio (OCR—the ratio of pre-consolidation stress to current natural overburden stress) values of the soil from soil surface to 6m depth varied from 1.72 to 15.34 and the maximum pre-consolidation stress was above 200 kPa. In consequence, the soils of the Yellow River Delta are highly over-consolidated within the upper 6 m, the OCR decreasing gradually with depth from 6 to 12 m. For samples from deeper than 12 m the soils were found to be under-consolidated, which was proved by standard penetration tests (SPTs). The main causes of this type of consolidation are the mineral composition and the designability of the soil body.
Starting Page	215
Ending Page	222
Page Count	8
File Format	PDF
ISSN	16725182
Journal	Journal of Ocean University of China
Volume Number	8
Issue Number	3
e-ISSN	19935021
Language	English
Publisher	SP Science Press
Publisher Date	2009-07-25
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	pre-consolidation stress Casagrande method OCR Yellow River Delta Oceanography
Content Type	Text
Resource Type	Article
Subject	Oceanography Ocean Engineering

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