[1]程兆杰,杨忠年,王阳阳,等.有压单向冻结橡胶加筋膨胀土的动力特性研究[J].西安建筑科技大学学报(自然科学版),2024,56(06):819-828.[doi:10.15986/j.1006-7930.2024.06.004]
　CHENG Zhaojie,YANG Zhongnian,WANG Yangyang,et al.Study on dynamic characteristics of unidirectional frozen rubber-reinforced expansive soil under confining pressure[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2024,56(06):819-828.[doi:10.15986/j.1006-7930.2024.06.004]
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有压单向冻结橡胶加筋膨胀土的动力特性研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
56
期数:
2024年06期
页码:
819-828
栏目:
出版日期:
2024-12-28

文章信息/Info

Title:
Study on dynamic characteristics of unidirectional frozen rubber-reinforced expansive soil under confining pressure
文章编号:
1006-7930(2024)06-0819-10
作者:
程兆杰1; 杨忠年1; 王阳阳2; 崔郁雪1; 凌贤长1; 3; 孙振兴1; 王荣昌1
（1.青岛理工大学 土木工程学院，山东 青岛 266033；2.山东省第四地质矿产勘查院，山东 潍坊 261021；3.哈尔滨工业大学 土木工程学院，黑龙江 哈尔滨 150001）
Author(s):
CHENG Zhaojie1;  YANG Zhongnian1;  WANG Yangyang2;  CUI Yuxue1;  LING Xianzhang1;  3;  SUN Zhenxing1;  WANG Rongchang1
（1.Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China; 2.Shandong Provincial No.4 Institute of Geological and Mineral Survey, Shandong Weifang 261021, China; 3.Department of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China）
关键词:
膨胀土; 橡胶加筋; 有压单向冻结; 橡胶粒径; 骨干曲线; 动剪切模量
Keywords:
expansive soil;  rubber-reinforced;  unidirectional freezing under pressure;  rubber particle size;  backbone curves;  dynamic shear modulus
分类号:
TU432
DOI:
10.15986/j.1006-7930.2024.06.004
文献标志码:
A
摘要:
废旧橡胶在岩土工程和环境地质工程中已得到广泛应用，许多学者利用橡胶进行土体的改良.然而橡胶加筋膨胀土有着更加复杂的力学性质，尤其是动力特性方面仍处于空白.因此本文利用自研温控动三轴设备，探究了有压单向冻结条件下冻结温度及橡胶粒径对橡胶加筋膨胀土动力特性的影响.结果表明：（1）有压冻结条件下，随温度的降低动剪切模量呈先增加后减小的趋势，当T=-12 ℃时，动剪切模量达到最大.（2）相同掺量下随着橡胶粒径增加，橡胶加筋膨胀土最大动剪切模量出现的负温也随之提高.粒径为0.25 mm时最大动剪切模量出现在-4 ℃，而粒径为043 mm时出现在-8 ℃.（3）橡胶粒径从2 mm降至0.18 mm，橡胶加筋膨胀土应力应变曲线的线弹性阶段范围略有增加，线弹性范围增加了0.283%.
Abstract:
Waste rubber has been widely used in geotechnical engineering and environmental geological engineering, and many scholars have used waste rubber for soil improvement. However, rubber-reinforced expansive soils have more complex mechanical properties, especially in terms of its dynamic characteristics, which remain unexplored. In this paper, the effects of freezing temperature and rubber particle size on the dynamic properties of rubber-reinforced expansive soil under confining pressure are investigated by using self-developed temperature-controlled dynamic triaxial equipment. The results show that: (1) Under confining pressure, the dynamic shear modulus tends to increase and then decrease with decreasing temperature. When T=-12 ℃, the dynamic shear modulus reaches the maximum. (2) With the increase of rubber particle size under the same mixture, the negative temperature for the maximum dynamic shear modulus of rubber-reinforced expansive soil also increases. When the particle size is 0.25 mm, the maximum dynamic shear modulus appears at -4 ℃, and when the particle size is 0.43 mm, it appears at -8 ℃. (3) When the rubber particle size decreases from 2 mm to 0.18 mm, and the range of linear elastic phase of rubber reinforced expanded soil stress-strain curve increases slightly, and the range of linear elasticity increases by 0.283%.

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相似文献/References:

[1]时伟,张亮,杨忠年,等.冻融循环条件下膨胀土力学特性试验研究[J].西安建筑科技大学学报(自然科学版),2019,51(04):480.[doi:10.15986/j.1006-7930.2019.04.003]
　SHI Wei,ZHANG Liang,YANG Zhongnian,et al.Experimental study on mechanical properties of expansive soilof artificial preparation under freeze-thaw cycle conditions[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(06):480.[doi:10.15986/j.1006-7930.2019.04.003]
[2]杨寓友,王叶娇,程 岩.裂隙性对膨胀土抗剪强度的影响研究[J].西安建筑科技大学学报(自然科学版),2024,56(04):554.[doi:10.15986/j.1006-7930.2024.04.009]
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备注/Memo

备注/Memo:
收稿日期:2022-09-08修回日期:2024-11-19
基金项目:国家自然科学基金（4217071578）；国家重大仪器开发项目（41627801）
第一作者:程兆杰（1998—），男，硕士生，主要从事特殊土力学方面研究.E-mail: 1441419738@qq.com
通信作者:杨忠年（1985—），男，博士，副教授，主要从事特殊土力学方面研究.E-mail: yzhnqd@qut.edu.cn
更新日期/Last Update: 2025-02-11