Non-Uniform Settlement of Compacted Earth Structures Caused by the Deformation Characteristics of Unsaturated Soil on Wetting
Non-Uniform Settlement of Compacted Earth Structures Caused by the Deformation Characteristics of Unsaturated Soil on Wetting
复制标题
DOI：
10.3208/sandf.47.195
复制
发表时间：
2007-04
影响因子：
3.7
通讯作者：
K. Kawai;A. Iizuka;E. Hayakawa;Weichuan Wang
中科院分区：
文献类型：
--
作者：
K. Kawai;A. Iizuka;E. Hayakawa;Weichuan Wang
采用非饱和土力学的土-水耦合有限元分析方法，对降雨作用下的压实土结构进行了分析。Karube等人（1996，1997）提出并由Karube和Kawai（2001）修改的本构模型被公式化用于初始和边界问题，并被编码为DACSAR-U（Iizuka等人，2000）。采用DACSAR-U软件对一个由压实非饱和土组成的深填土进行了分析。在有限元模拟中，将不同的降雨模式应用于深填土。结果表明，可以计算深填土的不均匀沉降，深填土的沉降量取决于塌陷量，即吸力减小引起的压缩量。此外，由于降雨和积累的不可逆的沉降，由于周期性降雨的延迟沉降进行了观察。
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.