Strength of expansive soil reinforced by polypropylene fiber under optimal water content

被引：0
|
作者：
Deng Y.-S. [1 ,2 ]
Wu P. [2 ]
Zhao M.-H. [3 ]
Duan B.-Z. [2 ]
机构：
[1] School of Civil Engineering & Architecture, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi
[2] School of Civil Engineering & Architecture, Hubei University of Technology, Wuhan, 430068, Hubei
[3] Institute of Geotechnical Engineering, Hunan University, Changsha, 410082, Hunan
来源：
| 1600年 / Academia Sinica卷 / 38期
基金：
中国国家自然科学基金;
关键词：
Expansive soils; Optimal water content; Polypropylene fiber; Shear strength; Unconfined compressive strength;
D O I：
10.16285/j.rsm.2017.02.006
中图分类号：
学科分类号：
摘要：
Many experiments are carried out to study strength of expansive soil reinforced by polypropylene fiber with different lengths and weight ratios of fiber to dry soil (0.0%, 0.1%, 0.2%, 0.3% and 0.4%), respectively. The results show that the shear strength of expansive soil is enhanced significantly by adding fiber, and the unconfined compressive strength increases dramatically with the increase of fiber contents. While the fiber content exceeds the optimal content 0.3%, the unconfined compressive strength and the shear strength all decrease. Under the condition of the same fiber content, the strength of expansive soil also increases significantly with the increase of fiber length. Polypropylene fiber can also improve the peak strength and fracture toughness of expansive soil, delay the destruction of expansive soil. The study results provide a useful method for improvement of expansive soil. © 2017, Science Press. All right reserved.
引用
收藏
页码：349 / 353and360
相关论文
共 15 条
  • [1] Li J., Sun Y.-X., Study on expansive soil in motorway, Advances in Science and Technology of Water Resources, 18, 1, pp. 41-46, (1998)
  • [2] Zhao X.-R., Hou T.-S., Wang H.-B., Discussion on modified methods for dilative soil, Subgrade Engineering, 1, pp. 95-96, (2008)
  • [3] Prabakar J., Sridhar R.S., Effect of random inclusion of sisal fibre on strength behaviour of soil, Construction and Building Materials, 16, 2, pp. 123-131, (2002)
  • [4] Shi L.-G., Zhang M.-X., Cao P., Triaxial shear strength characteristics of lime-soil reinforced with polypropylene fiber inclusions, Rock and Soil Mechanics, 32, 9, pp. 2721-2728, (2011)
  • [5] Jie Y.-X., Li G.-X., Chen L., Study of centrifugal model tests on texsol and cohesive soil slopes, Chinese Journal of Geotechnical Engi- neering, 20, 4, pp. 12-15, (1998)
  • [6] Jie Y.-X., Li G.-X., Equivalent additional stress method for numerical analysis of reinforced soil, Chinese Journal of Geotechnical Engineering, 21, 5, pp. 614-616, (1999)
  • [7] Jie Y.-X., Wang N.-D., Li G.-X., Modified equivalent additional stress method for numerical analysis of reinforced soil, Rock and Soil Mechanics, 28, pp. 129-132, (2007)
  • [8] Lei S.-Y., Analysis of the reinforced soils strength using damage theory, Journal of Railway Science and Engineering, 3, 6, pp. 42-45, (2006)
  • [9] Ding W.-T., Study of strength of reinforced expansive soils, (2002)
  • [10] Zhang Y.-M., Zhang X.-D., Zhang H.-R., Test research of geotechnique textile soil reinforcement mechanism and engineering application, Rock and Soil Mechanics, 26, 8, pp. 1323-1326, (2005)
12