南阳师范学院学报2025，Vol.24Issue(3)：48-55,8.
沉积方向对饱和砂土动态性能影响的试验研究
Experimental study on the influence of sedimentary direction on the dynamic properties of saturated sand
摘要
Abstract
Based on the capillary phenomenon of soil,specimens with different deposition directions are pre-pared.The dynamic characteristics of sandy soil are then studied.The influence of deposition direction and ef-fective consolidation stress on dynamic parameters and their regularities are investigated.The results show that under the same effective consolidation stress,the dynamic shear modulus of the specimen in the deposition direc-tion changes significantly.When the effective consolidation stress is 100 kPa,200 kPa,and 300 kPa,the re-duction rates of the maximum dynamic shear modulus at deposition directions of 0° and 60° are 7.83%,5.80%,and 13.62%respectively.The dynamic shear modulus first decreases and then increases with the increase of the deposition direction,reaching the lowest value at around 60°.At low effective consolidation stress,the deposi-tion direction has a more obvious influence on the damping ratio of the specimen.However,at high effective con-solidation stress,this influence can be ignored.When the most unfavorable failure surface(45°+φ/2)(where α is the internal friction angle)of the specimen is consistent with the deposition direction,it has the smallest dy-namic shear modulus.A fitting formula for the maximum dynamic shear modulus and deposition direction of sandy soil is established,providing a scientific basis for predicting the dynamic performance of sandy soil.关键词
毛细现象/沉积方向/共振柱/动剪切模量/阻尼比Key words
capillary phenomenon/deposition direction/resonant column/dynamic shear modulus/damping ratio分类
土木建筑引用本文复制引用
王辉,罗强,宋文谦..沉积方向对饱和砂土动态性能影响的试验研究[J].南阳师范学院学报,2025,24(3):48-55,8.基金项目
国家自然科学基金(51609117) （51609117）
