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A Note on Soil Structure Resistance of Natural Marine Deposits
作者姓名:洪振舜  刘松玉  刘志方
作者单位:InstituteofGeotechnicalEngineering,SoutheastUniversity,Nanjing210096,China
基金项目:hisresearchprojectispartiallysupportedbyScientificResearchStartingFundforReturnedResearchers,MinistryofEducation,China (GrantNo .2 0 0 3 4 0 6 )
摘    要:It has been well documented that natural normally-consolidated marine soils are generally subjected to the effects of soil structure. The interpretation of the resistance of soil structure is an important issue in the theory study and engineering practice of ocean engineering and geotechnical engineering. It is traditionally considered that the resistance of soil structure gradually disappears with increasing stress level when the applied stress is beyond the consolidation yield stress. In this study, however, it is found that this traditional interpretation of the resistance of soil structure can not explain the strength behavior of natural marine deposits with a normally-consolidated stress history A new interpretation of the resistance of soil structure is proposed based on the strength behavior. In the preyield state, the undrained strength of natural marine deposits is composed of two components: one developed by the applied stress and the other developed by the resistance of soil structure. When the applied stress is beyond the consolidation yield stress, the strength behavior is independent of the resistance of soil structure.

关 键 词:固体屈服应力  海洋粘土  后屈服状态  土壤结构  强度

A Note on Soil Structure Resistance of Natural Marine Deposits
HONG Zhen-shun ,LIU Song-yu and LIU Zhi-fangInstitute of Geotechnical Engineering,Southeast University,Nanjing ,China.A Note on Soil Structure Resistance of Natural Marine Deposits[J].China Ocean Engineering,2004,18(2):321-326.
Authors:HONG Zhen-shun  LIU Song-yu and LIU Zhi-fangInstitute of Geotechnical Engineering  Southeast University  Nanjing  China
Institution:HONG Zhen-shun 1,LIU Song-yu and LIU Zhi-fangInstitute of Geotechnical Engineering,Southeast University,Nanjing 210096,China
Abstract:It has been well documented that natural normally-consolidated marine soils are generally subjected to the effects of soil structure. The interpretation of the resistance of soil structure is an important issue in the theory study and engineering practice of ocean engineering and geotechnical engineering. It is traditionally considered that the resistance of soil structure gradually disappears with increasing stress level when the applied stress is beyond the consolidation yield stress. In this study, however, it is found that this traditional interpretation of the resistance of soil structure can not explain the strength behavior of natural marine deposits with a normally-consolidated stress history. A new interpretation of the resistance of soil structure is proposed based on the strength behavior. In the preyield state, the undrained strength of natural marine deposits is composed of two components: one developed by the applied stress and the other developed by the resistance of soil structure. When the applied stress is beyond the consolidation yield stress, the strength behavior is independent of the resistance of soil structure.
Keywords:consolidation yield stress  marine clays  normally-consolidated stress history  postyield state  resistance of soil structure  strength behavior  structured soils
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