Open AccessExperimental Study on Creep Characteristics of Saturated Sandy Soil with Different Fines Content
Author(s) -
Jintao Su,
Shijie Wang
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 - 10.1088/1755-1315/719/4/042070
Subject(s) - creep , geotechnical engineering , grain size , materials science , water content , stress (linguistics) , deformation (meteorology) , geology , composite material , linguistics , philosophy
In order to better study and predict the post-construction settlement of sand with fine-grained blow-filled sand, sand samples with different fine-grained contents were prepared according to the actual engineering geological conditions, and one-dimensional creep tests were carried out to reveal the effect of fine-grained content on the creep characteristics of saturated sand. The results show that the creep curve of saturated sand has nonlinear characteristics and is basically divided into three stages: instantaneous deformation, rapid deformation and steady-state creep; When the content of fine grain is less than 25%, the strain is smaller than that of sand without fine grain, and the average strain is minimum when the content of fine grain is between 15%∼25%; When the content of fine grain is more than 25%, the strain of sand under the same load increases with the increase of fine grain content; The 5-element generalized Kelvin model can describe the creep characteristics of saturated sand with different fine grain content, the correlation coefficient of fitting curve is 0.964∼0.997, the creep parameters in the model are related to normal stress, and all the parameters increase with the increase of normal stress.