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土工布加筋黄土力学性能研究
刘少博,顾强康,梁建伟,屈波,张昊
摘 要
(空军工程大学航空航天工程学院, 西安 710038)

[摘要]采用较高水平的围压,对土工布加筋黄土进行三轴剪切试验,探究了不同围压和加筋方式下土工布加筋黄土的强度及变形特性。结果表明:在较高围压条件下,土工布加筋土体的应力-应变曲线由应变软化型转变为应变硬化型,土体强度有所提高,导致强度提高的主要原因是其黏聚力的增大;随围压的增大、加筋层数的增多,土体强度不断增大;较低围压条件下加筋效果不明显,围压越大,筋材对土体的加固效果越难得到充分发挥。因此,在适当的围压范围内可以使用加筋方法来加固土体。
[关键词]加筋黄土; 土工布; 三轴剪切试验; 应力-应变特征
中图分类号:TU431      文献标识码:A      文章编号:1002-848X(2015)14-0099-04

Research on the mechanics property of fabric reinforced loess
Liu Shaobo, Gu Qiangkang, Liang Jianwei, Qu Bo, Zhang Hao
(Institute of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi'an 710038, China)
 
Abstract: Triaxial shear test under high confining pressure on fabric reinforced loess samples was carried out to investigate the strength and deformation characteristic of fabric reinforced loess through varying confining pressure and forms of reinforcement. The results demonstrate that stress-strain curve of fabric reinforced loess turns into strain-softening characteristics from strainhardening under the condition of high confining pressure, and the strength of fabric reinforced loess is improved mostly for the reason that cohesion of the soil increases. The strength of the soil increases with the increase of confining pressure and reinforced layers. The effect of setting fabric is not apparent under the condition of low confining pressure, and the strengthening effect of fabric to loess dose not play a role sufficiently with the increase of confining pressure. So setting fabric method in the soil can be used to strengthen the soil within the scope of the appropriate confining pressure.
Keywords: reinforced loess; fabric; triaxial shear test; stress-strain characteristic

作者简介:刘少博,硕士研究生,Email:tju_boshaoliu@163.com。
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