[1]孟 靖,庄心善,周睦凯,等. 粉煤灰改良膨胀土动弹性模量与阻尼比试验研究[J].湖北工业大学学报,2022,(2):70-74.
　MENG Jing,ZHUNG Xinshan,ZHOU Mukai,et al. An Experimental Study on Elastic Modulus and Damping Ratio of Expansive Soil Improved by Fly Ash[J].,2022,(2):70-74.
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 粉煤灰改良膨胀土动弹性模量与阻尼比试验研究()
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《湖北工业大学学报》[ISSN:1003-4684/CN:42-1752/Z]

卷:
期数:
2022年第2期
页码:
70-74
栏目:
湖北工业大学学报
出版日期:
2022-04-29

文章信息/Info

Title:
 An Experimental Study on Elastic Modulus and Damping Ratio of Expansive Soil Improved by Fly Ash
文章编号:
1003-4684(2022)02-0070-05
作者:
 孟 靖;  庄心善;  周睦凯;  周 荣
 湖北工业大学土木建筑与环境学院， 湖北 武汉 430068
Author(s):
 MENG Jing;  ZHUNG Xinshan;  ZHOU Mukai;  ZHOU Rong
 School of Civil Engin.,Architecture and Environment,Hubei Univ.of Tech.,Wuhan 430068,China
关键词:
 ; 膨胀土;  粉煤灰;  动三轴试验;  动弹性模量;  阻尼比
Keywords:
 ; expansive soil;  fly ash;  dynamic triaxial test;  dynamic elastic modulus;  damping ratio
分类号:
TU443
文献标志码:
A
摘要:
 以合肥某高速公路膨胀土为研究对象，利用GDS真动三轴仪对不同粉煤灰掺量与不同围压条件下的改良膨胀土进行分级荷载动力试验，研究改良膨胀土动弹性模量与阻尼比的变化规律。结果表明：掺入粉煤灰可以显著提高膨胀土的动弹性模量，当掺灰率小于10%时，改良土动弹性模量Ed及其峰值Edmax随着掺灰率的增大而增大，当掺灰率大于10%时，改良土Ed与Edmax随着掺灰率的增大而减小；改良土阻尼比λ随着围压的增大而增大，每50 kPa能提高5%~10%，但掺灰率对阻尼比无明显影响。
Abstract:
 Taking the expansive soil of a certain expressway in Hefei as the research object, using the GDS true dynamic triaxial instrument to carry out the graded load dynamic test of the improved expansive soil under different fly ash content and different confining pressure conditions, the dynamic elastic modulus and The changing law of damping ratio is studied. The results show that mixing fly ash can significantly increase the dynamic elastic modulus of expansive soil. When the ash mixing rate is less than 10%, the modified soil dynamic elastic modulus Ed and its peak Edmax increase with the increase of the ash mixing rate. When the ash mixing rate is greater than 10%, the Ed andEdmax of the modified soil decrease with the increase of the ash mixing rate; the damping ratio λ of the modified soil increases with the increase of the confining pressure, and it can increase by 5% every 50kPa~10%, but the ash mixing rate has no obvious effect on the damping ratio.

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备注/Memo

备注/Memo:
［收稿日期］ 2021-04-25
［基金项目］ 国家自然科学基金（51708190）
［第一作者］ 孟 靖（1996-），男，湖北武汉人，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: 2022-04-28