Research on Wetting-Deformation Regularity and Microstructure Evolution Characteristics of Remoulded Loess in Triaxial Soaking Tests

doi:10.3969/j.issn.0258-2724.20160736

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	Research on Wetting-Deformation Regularity and Microstructure Evolution Characteristics of Remoulded Loess in Triaxial Soaking Tests
	Guo, Nan 1; Chen, Zhenghan 1,2; Yang, Xiaohui 1; Zhou, Yong 1; Xiao, Wencheng 3
刊名	Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University
	2019-02-01
卷号	54 期号:1 页码:73-81 and 90
关键词	Deformation Microstructure Rock pressure Sediments Shotcreting Soil mechanics Soil surveys Soils Strain Stresses Wetting Anisotropic consolidation Damage evolution equation Macroscopic deformations Micro-structure evolutions Structural evolution Triaxial apparatus Unsaturated remoulded loess Wetting deformations
ISSN号	02582724
DOI	10.3969/j.issn.0258-2724.20160736
英文摘要	To explore the wetting-deformation regularity and microstructure evolution characteristics of filled soil, three groups, 17 samples, of immersed anisotropic consolidation tests of reshaped Q2 loess in the Yan'an new district were studied using the improved unsaturated soil triaxial apparatus with computed tomography (CT). The CT scanning was applied to the two sections of the samples in the triaxial soaking studies. The macroscopic deformations, soil samples'internal mesoscopic structure evolution CT images and the corresponding CT data were obtained in the consolidation and the wet process of the soil sample. Structural parameters and structural evolution variables of the soil were defined based on the CT data. The results show that the dry density, net confining pressure, matrix suction, and deviatoric stress have a significant influence on the wetting deformation characteristics. Increased dry density can effectively reduce the wetting deformations and the risk of wet shear failure. (The strains of the dry density specimen at 1.52 g/cm3 and 1.69 g/cm3 during immersion were -0.58% to 4.66% and -0.58% to 2.43%, respectively, and the strain of the dry density specimen of 1.79 g/cm 3 was 0.019%.)The CT data of all samples increased, indicating that the specimens become more and more compacted due to humidification deformation. In the early stage of immersion, the original structures of the soil samples were destroyed, and the change of CT data was more severe, reaching 60% of the total change. Meanwhile, the result is affected by the dry density, net confining pressure, suction, deviatoric stress, and moisture content. These results are valuable for the design of filled soil engineering and provide a scientific basis to establish the structure of the unsaturated remoulded loess damage evolution equation and the structural model. © 2019, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114749]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Department of of Military Installation, Army Service University, Chongqing; 401311, China; 3.Shaanxi Provincial Health Supervision Institute of Nanzheng County Family Planning, Hanzhong; 723100, China
推荐引用方式 GB/T 7714	Guo, Nan,Chen, Zhenghan,Yang, Xiaohui,et al. Research on Wetting-Deformation Regularity and Microstructure Evolution Characteristics of Remoulded Loess in Triaxial Soaking Tests[J]. Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University,2019,54(1):73-81 and 90.
APA	Guo, Nan,Chen, Zhenghan,Yang, Xiaohui,Zhou, Yong,&Xiao, Wencheng.(2019).Research on Wetting-Deformation Regularity and Microstructure Evolution Characteristics of Remoulded Loess in Triaxial Soaking Tests.Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University,54(1),73-81 and 90.
MLA	Guo, Nan,et al."Research on Wetting-Deformation Regularity and Microstructure Evolution Characteristics of Remoulded Loess in Triaxial Soaking Tests".Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University 54.1(2019):73-81 and 90.