长江科学院院报 ›› 2016, Vol. 33 ›› Issue (2): 71-73.DOI: 10.11988/ckyyb.20140843

• 岩土工程 • 上一篇    下一篇

聚丙烯纤维土受力性能试验研究

孙舒1, 袁学锋1, 李福林2, 王月华1   

  1. 1.泰州职业技术学院 建筑工程学院,江苏 泰州 225300;
    2.中国矿业大学 力学与建筑工程学院,江苏 徐州 221006
  • 收稿日期:2014-09-29 出版日期:2016-02-01 发布日期:2016-02-17
  • 作者简介:孙 舒(1983-),男,江苏连云港人,讲师,硕士,主要研究方向为建筑地基新技术应用,(电话)13961042107(电子信箱)116258624@qq.com。
  • 基金资助:
    2013年国家自然科学基金项目(51308533);2015年泰州职业技术学院重点基金项目(TZYK153)

Mechanical Properties of Polypropylene Fibre-reinforced Soil

SUN Shu1, YUAN Xue-feng1, LI Fu-lin2, WANG Yue-hua1   

  1. 1.School of Civil Engineering, Taizhou Polytechnic College, Taizhou 225300, China;
    2.School of Mechanics &Civil Engineering, China University of Mining and Technology, Xuzhou 221006, China
  • Received:2014-09-29 Published:2016-02-01 Online:2016-02-17

摘要: 为了解决由煤层采动和重载车辆导致的路基砂土大变形问题,依据三轴压缩试验,研究了4种纤维长度和4种纤维掺量下砂土的强度和抗变形能力。结果表明:纤维土的应力-应变关系近似呈双曲线关系,主要破坏形式为鼓胀破坏;纤维土的力学性能随纤维掺量和长度的增加而增大,但对内摩擦角影响很小。最后在试验基础上通过1stOpt进行多因素回归分析得到黏聚力与纤维长度和掺量的拟合公式,并通过与实测值比较,认为其能够满足工程需要。

关键词: 纤维土, 路基砂土, 变形性能, 三轴压缩试验, 黏聚力

Abstract: In order to solve the problem of excessive deformation of sandy soil at road foundation caused by mining and automobile with heavy duty, we study the strength and deformation resistance of sandy soil under four different fiber lengths and blending amounts through triaxial compression test.Results show that the stress-strain relation of fiber-reinforced soil is approximately a hyperbolic function, in which the main failure form is swollen failure. With the increase of blending proportion and length of fibre, the mechanical properties of fibre-reinforced soil strengthen, but the angle of internal friction is barely affected. Finally, a fitting formula of cohesion vs. fiber length and mixing amount is obtained by multivariate regression analysis based on the 1stOpt experiment and the results meet the requirement of actual projects by comparison with measured data.

Key words: fiber-reinforced soil, sandy soil of subgrade, deformation properties, triaxial compression test, cohesion

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