摘要
Abstract
To explore the static and dynamic characteristics of the siltstone in the Liaobai River flood control embankment,triaxial static tests and SHPB dynamic impact tests were conducted on the siltstone.Research has shown that the dry and wet paths can affect the static strain curve characteristics of sandstone samples,with higher saturation resulting in lower triaxial compressive strength of the samples.In power testing,when the water saturation exceeds 70%,the dynamic strength decreases more significantly,but increasing the impact air pressure will weaken the weakening effect of water saturation on the dynamic strength of the sample.The greater the impact pressure,the greater the decrease in peak strain and post peak stress of the sample;There is a positive correlation between strain rate and dynamic compressive strength.Increasing the impact air pressure can promote the correlation between dynamic strength and strain rate.The paper has reference value for exploring the static and dynamic characteristics of sandstone.关键词
廖白河防洪大堤/粉砂岩/三轴静力/SHPB测试/动态抗压强度Key words
Liaobai river flood control embankment/siltstone/three-axis static force/shpb testing/dynamic compressive strength分类
建筑与水利
