Research on physical and mechanical properties of Xinjiang Daxigou loess

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Zhang, Yao^1,2 ; Hu, Zaiqiang^1 ; Lin, Shan^1 ; Li, Zhijuan^1 ; Li, Hongru^1

School of Civil Engineering and Architecture, Xi'An University of Technology, Xi'an, Shaanxi

710048, China^1

School of Human Settlements and Engineering, Xi'An Peihua University, Xi'an, Shaanxi

710100, China^2

关键词: Compaction characteristics;    Compression characteristics;    Compression coefficients;    Compression modulus;    Duncan Chang model;    Methods of constructions;    Physical and mechanical properties;    Wetting deformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/6/012002/pdf
DOI  :  10.1088/1755-1315/186/6/012002

来源: IOP

【 摘 要 】

The technology and methods of construction of embankment dam are closely related with the dam soil. Therefore, physical and mechanical properties of soil material must be studied. In this paper, with the study of Xinjiang Daxigou dam soil, compaction characteristics, compression characteristics, strength properties and wetting deformation characteristics were analyzed. The results showed that compaction work has great impact on the dry density, but the extent must be noted when increasing compaction to improve the compaction degree. Soil compaction has great impact on the compression characteristics. Compression coefficient rapidly decreased as the pressure increases. Inflection point can be observed when the pressure reaches a certain level. Compression modulus increases with the increasing pressure and compaction degree. Water content and void ratio indicators have a certain function with strength index. Duncan - Chang model parameters present certain regularity as the change of moisture content and compaction, and the compaction degree has a great influence on parameters. Stress level has a significant influence on wetting deformation, which is closely related to the compaction degree.