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[1]顾鹏,徐洪钟,孙义杰,等.基于分布式应变感测的纤维加筋膨胀土干缩湿胀特性试验[J].南京工业大学学报(自然科学版),2018,40(05):112-117.[doi:10.3969/j.issn.1671-7627.2018.05.018]
 GU Peng,XU Hongzhong,SUN Yijie,et al.Test on shrinkage-swelling effect of fiber-reinforced expansive soil based on distributed strain sensing technology[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2018,40(05):112-117.[doi:10.3969/j.issn.1671-7627.2018.05.018]
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基于分布式应变感测的纤维加筋膨胀土干缩湿胀特性试验()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
40
期数:
2018年05期
页码:
112-117
栏目:
出版日期:
2018-09-20

文章信息/Info

Title:
Test on shrinkage-swelling effect of fiber-reinforced expansive soil based on distributed strain sensing technology
文章编号:
1671-7627(2018)05-0112-06
作者:
顾鹏徐洪钟孙义杰尤波
南京工业大学 交通运输工程学院,江苏 南京 210009
Author(s):
GU PengXU HongzhongSUN YijieYOU Bo
College of Transportation Science & Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
膨胀土 纤维加筋 干缩湿胀 布里渊光时域分析技术(BOTDA)
Keywords:
expansive soil fiber reinforced shrinkage-swelling Brillouin optical time domain analysis(BOTDA)
分类号:
TU443
DOI:
10.3969/j.issn.1671-7627.2018.05.018
文献标志码:
A
摘要:
为了研究素膨胀土和玄武岩纤维加筋膨胀土在干缩湿胀过程中的应变分布及其裂缝发育规律,试验设计了一个长100 cm、宽7 cm、高5 cm的室内模型钢槽,将传感光纤埋于钢槽中以测量素膨胀土和玄武岩纤维加筋膨胀土应变。基于布里渊光时域分析技术(BOTDA)获得了土体应变分布。结果表明:在膨胀土干缩湿胀过程中,膨胀土模型区域最大收缩应变与含水率之间呈近似线性的负相关。随着含水率的变化,纤维加筋膨胀土应变量和应变变幅均小于素膨胀土的应变量和变化幅度,说明玄武岩纤维显著降低膨胀土的拉伸应变和收缩应变,限制膨胀土的变形和抑制裂缝的发育。
Abstract:
The difference between expansive soil and fiber-reinforced expansive soil in the strain distribution and the development of cracking during shrinkage-swelling cycle were investigated with a model box of 100 cm long,7 cm wide and 5 cm high.The Brillouin optical time domain analysis(BOTDA)was used to monitor the strain distribution of the sensing fibers embedded in the soil.Results indicated that the max value of regional compression deformation was inversely linear to moisture content approximatively during dry-wet cycle.The value of strain amplitude and deformation of fiber-reinforced expansive soil was less than that of expansive soil with the change of moisture content.The basalt fiber could reduce the value of tensile strain and shrinkage strain of expansive soil.In addition,the basalt fiber was useful to restrain the deformation and cracking of soil.

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备注/Memo

备注/Memo:
收稿日期:2017-04-12
基金项目:江苏省青蓝工程; 江苏省自然科学基金(BK20160997); 江苏省高校自然科学研究面上项目(16KJB410001)
作者简介:顾鹏(1992—),男,江苏兴化人,硕士,主要研究方向为岩土工程监测; 徐洪钟(联系人),教授,E-mail:hzhxu@163.com.
引用本文:顾鹏,徐洪钟,孙义杰,等.基于分布式应变感测的纤维加筋膨胀土干缩湿胀特性试验[J].南京工业大学学报(自然科学版),2018,40(5):112-117..
更新日期/Last Update: 2018-09-30