[1]张丹,许强,郭莹.玄武岩纤维加筋膨胀土的强度与干缩变形特性试验[J].东南大学学报(自然科学版),2012,42(5):975-980.[doi:10.3969/j.issn.1001-0505.2012.05.032]
 Zhang Dan,Xu Qiang,et al.Experiments on strength and shrinkage of expansive soil with basalt fiber reinforcement[J].Journal of Southeast University (Natural Science Edition),2012,42(5):975-980.[doi:10.3969/j.issn.1001-0505.2012.05.032]
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玄武岩纤维加筋膨胀土的强度与干缩变形特性试验()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
42
期数:
2012年第5期
页码:
975-980
栏目:
其他
出版日期:
2012-09-20

文章信息/Info

Title:
Experiments on strength and shrinkage of expansive soil with basalt fiber reinforcement
作者:
张丹12 许强2 郭莹3
1 南京大学地球科学与工程学院,南京 210093; 2 成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059; 3 中国建筑西南设计研究院有限公司,成都610000
Author(s):
Zhang Dan1 2 Xu Qiang2 Guo Ying3
1 School of Earth Science and Engineering, Nanjing University, Nanjing 210093, China
2 State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
3 China Southwest Architectural Design and Research Institute Corp. Ltd, Chengdu 610000, China
关键词:
膨胀土 玄武岩纤维 干缩 FBG 应变分布
Keywords:
expansive soil basalt fiber shrinkage fiber Bragg grating(FBG) strain distribution
分类号:
P642.13
DOI:
10.3969/j.issn.1001-0505.2012.05.032
摘要:
通过掺入玄武岩纤维对膨胀土进行改良,采用快剪试验、收缩试验得到了加筋膨胀土的直剪强度参数和收缩变形特征.研制了矩形制样器,通过分层压实的方法将传感光栅串埋入土体中,采用光纤光栅传感技术(FBG),分别得到了素膨胀土和纤维加筋膨胀土试样在干缩过程中的光栅应变,对比了2种试样干缩变形的空间分布特征及其发展规律.试验结果表明,通过掺入一定量的玄武岩纤维,可以在一定程度上提高膨胀土的强度参数,使膨胀土的收缩系数显著下降,较大改善了膨胀土收缩过程中土体内部应变分布不均匀的状态,对膨胀土裂隙的产生具有显著的抑制效果.
Abstract:
With the incorporation of basalt fiber, the expansive soil can be reinforced. By using quick direct shearing test and shrinkage test, shear strength parameters and shrinkage characteristics of the reinforced expansive soil are obtained. A steel cuboid vessel is designed to make strip samples for further shrinkage test with fiber Bragg grating(FBG)sensing technology. Through the hierarchical compaction with oil jack, sensing fibers with FBG sensors are embedded into the soil. The strain of the FBG sensors is obtained during the dehydration process of expansive soil and reinforced expansive soil. The temporal and spatial distribution of the soil shrinkage deformation is investigated. The results show that adding a proper amount of basalt fibers into the expansive soil is helpful to increase the strength parameters, reduce the contraction coefficient, average the strain state of the soil and restrain its cracking effectively.

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备注/Memo

备注/Memo:
作者简介: 张丹(1976—),男,博士,副教授, zhangdan@nju.edu.cn.
基金项目: 国家自然科学基金青年科学基金资助项目(40702045)、地质灾害防治与地质环境保护国家重点实验室开放基金资助项目(SKLGP2011K011)、中央高校基本科研业务费专项资金资助项目(1116020605).
引文格式: 张丹,许强,郭莹.玄武岩纤维加筋膨胀土的强度与干缩变形特性试验[J].东南大学学报:自然科学版,2012,42(5):975-980. [doi:10.3969/j.issn.1001-0505.2012.05.032]
更新日期/Last Update: 2012-09-20