松花江干流治理工程堤防砂土动力学特性研究

(1吉林建筑大学 测绘与勘查工程学院,长春 130118;2中水东北勘测设计研究有限责任公司,长春 130000)

饱和砂土,动三轴,动弹模,阻尼比,液化

Study on the dynamic characteristics of embankment sand soil in the songhua river main stream treatment project
FANG Zhi-hui1,SUN Chao1,BAO Shuo-chao1*,LI Ming1,MA Dong-he2,NIU Jia-bao1

(1 School of surveying exploration engineering,Jilin Jianzhu university,Changchun 130118,China;2 Zhongshui northeast survey design & research CO.,LTD.,Changchun 130000,China)

saturated sand,dynamic tri-axial,dynamic mould,damping ratio,liquefied

备注

为了研究松花江干流治理工程堤防及建筑物地基的砂土动力学特性,本文对研究区域饱和处理后土样进行了动三轴试验,研究了土样的动弹模和阻尼比,分析了饱和砂土的动力学特性指标.结果表明,在动荷载作用下土的有效应力随超孔隙水压增大而减小,在轻微振动(如车辆等)作用下砂土地基会先密实并趋近稳定,但当动应力较大时,则不利于砂土地基的稳定.

In order to study the dynamic characteristics of sandy soil for embankment and building foundation of Songhua river main stream treatment project,in this paper,the dynamic tri-axial tests of saturated soil samples were carried out,the dynamic modulus and damping ratio of the samples were studied,and the dynamic characteristics of saturated sand were analyzed.The results show that the effective stress of soil decreases with the increase of excess pore water pressure under dynamic load,and under the action of slight vibration(such as vehicles,etc.),the sand foundation will first be compacted and tend to be stable,but when the dynamic stress is large,it is not conducive to the stability of the sand foundation.