NON-UNIFORM SETTLEMENT OF COMPACTED EARTH STRUCTURES CAUSED BY THE DEFORMATION CHARACTERISTICS OF UNSATURATED SOIL ON WETTING

SOILS AND FOUNDATIONS

ATSUSHI IIZUKA⁴  WEICHUAN WANG¹  KATSUYUKI KAWAI²  EIJI HAYAKAWA³ 

[1] Nikken Soil Research Co., Ltd.;Dept. of Civil Engineering, Kobe University;Aichi Prefecture;Research Center for Urban Safety and Security, Kobe University

关键词: earthfill;    finite element method;    rainfall;    suction;    unsaturated soil;    (IGC: E2/E7);   

DOI  :  10.3208/sandf.47.195

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(21)The soil/water-coupled analysis for unsaturated soil mechanics with the finite element method is used to express the behavior of compacted earth structures exposed to rainfall. The constitutive model, which is proposed by Karube et al. (1996, 1997) and modified by Karube and Kawai (2001), is formulated for initial and boundary problems and coded as DACSAR-U (Iizuka et al., 2000). A deep fill, which consists of compacted, unsaturated soil, was analyzed with DACSAR-U. Different patterns of rainfall were applied to deep fills in finite element simulations. As a result, non-uniform settlement of deep fill can be calculated and the magnitude of settlement of deep fills is dependent on the amount of collapse, namely, the compression due to the decrease in suction. Moreover, delayed settlement due to rainfall and an accumulation of an irreversible settlement due to cyclic rainfall was observed.

【 授权许可】

Unknown