[1]金合意,庄心善,周 荣,等. 冻融循环对风化砂改良膨胀土阻尼比影响试验研究[J].湖北工业大学学报,2023,(4):97-100.
　JIN Heyi,ZHUANG Xinshan,ZHOU Rong,et al. Experimental Study on the Influence of Freeze-thaw Cycles on the Damping Ratio of Weathered Sand Modified Expansive Soil[J].,2023,(4):97-100.
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 冻融循环对风化砂改良膨胀土阻尼比影响试验研究()
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《湖北工业大学学报》[ISSN:1003-4684/CN:42-1752/Z]

卷:
期数:
2023年第4期
页码:
97-100
栏目:
湖北工业大学学报
出版日期:
2023-08-30

文章信息/Info

Title:
 Experimental Study on the Influence of Freeze-thaw Cycles on the Damping Ratio of Weathered Sand Modified Expansive Soil
文章编号:
1003-4684(2023)04-0097-04
作者:
 金合意;  庄心善;  周 荣;  周睦凯
 湖北工业大学土木建筑与环境学院， 湖北 武汉 430068
Author(s):
 JIN Heyi;  ZHUANG Xinshan;  ZHOU Rong;  ZHOU Mukai
 School of Civil Engin.,Architecture and Environment, Hubei Univ. of Tech.，Wuhan 430068,China
关键词:
 ; 膨胀土;  冻融循环;  风化砂;  动三轴试验;  阻尼比
Keywords:
 ; expanding soil;  freeze-thaw cycles;  weathered sand;  dynamic triaxial test;  damping ratio
分类号:
TU411
文献标志码:
A
摘要:
 对风化砂改良后的膨胀土试样进行冻融循环试验与动三轴试验，探究不同冻融周期与风化砂掺量下土体阻尼比的变化规律。试验结果表明二者均对阻尼比有较大影响：冻融循环使土体的微观结构发生改变，孔隙率增加，黏粒含量增多，最终使试样的粘滞性变大，故阻尼比随冻融次数的累积而逐渐增加，但变化幅度越来越小，历经6次冻融后，阻尼比基本趋于稳定值；风化砂的掺入加大颗粒间的摩阻力，使颗粒发生滑动错位的概率减小，故土体等效阻尼比与掺砂率呈反比，随着掺砂率的不断增加，试样等效阻尼比在不断减小。
Abstract:
 The freeze-thaw cycle test and dynamic triaxial test were conducted on the expanded soil specimens modified by weathered sand to investigate the changes of damping ratio of the soil under different freeze-thaw cycles and the amount of weathered sand mixture. The test results show that freeze-thaw cycles and amount of weathered sand mixture have a great influence on the damping ratio: the freeze thaw cycle changes the microstructure of the soil, increase porosity, clay content increase, eventually make the viscosity of the sample, so the damping ratio gradually increased along with the accumulation of freezing and thawing times, more and more small, but changes in over 6 times after freezing and thawing, damping ratio of basic stable value; The addition of weathered sand increases the friction resistance between particles and reduces the probability of sliding dislocation of particles. The equivalent damping ratio of native soil is inversely proportional to the sand mixing rate. With the increase of sand mixing rate, the equivalent damping ratio of samples decreases continuously.

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备注/Memo

备注/Memo:
 ［收稿日期］ 2021-12-16
［基金项目］ 国家自然科学基金（51708190）
［第一作者］ 金合意（1998-），男，湖北红安人，湖北工业大学硕士研究生，研究方向为岩土工程。
［通信作者］ 庄心善（1964-），男，河南周口人，湖北工业大学教授，研究方向为岩土工程及边坡工程。
更新日期/Last Update: 2023-08-26