Open AccessStudy on Dynamic Characteristics of Unsaturated Strongly Weathered Sericite Schist Residual Soil
Author(s) -
Nie Guang-ying,
Xia Yu,
Qingwen Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/647/1/012103
Subject(s) - sericite , schist , shear modulus , geotechnical engineering , residual , shear (geology) , overburden pressure , geology , materials science , composite material , metamorphic rock , geochemistry , mathematics , quartz , algorithm
Sericite schist residual soils are widely distributed on the shallow surface of western Yunnan, and most of them are in an unsaturated state. In order to study its dynamic characteristics, a resonance column tester was used to target the strongly weathered unsaturated sericite schist residuals in the Dali Railway. The soil carries out dynamic characteristic test to study. The results show that the confining pressure has a great influence on the dynamic characteristics of the specimen, the dynamic shear modulus increases with the increase of the confining pressure, the phenomenon that the damping ratio decreases with the increase of shear strain is more obvious. Using the Hardin-Drnevich model can better fit the dynamic shear modulus with shear strain. The application of the improved linear equation can better describe the relationship and analyse its mechanism.