Experimental study on anti-erosion performance
of polypropylene fiber-reinforced loess

AN Ning; YAN Chang-gen; WANG Ya-chong; LAN Heng-xing; BAO Han; XU Jiang-bo; SHI Yu-ling; SUN Wei-feng

doi:10.16285/j.rsm.2020.0879

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Experimental study on anti-erosion performance of polypropylene fiber-reinforced loess

更新时间：2026-06-25

- Experimental study on anti-erosion performance of polypropylene fiber-reinforced loess
- Vol. 42, Issue 2, Pages: 501-510(2021)
- 作者机构：
  
  1. 长安大学公路学院,陕西,西安,710064
  2. 北京建达道桥咨询有限公司,北京,100020
  3. 中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室,北京,100101
  4. 长安大学地质工程与测绘学院,陕西,西安,710054
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2020.0879
  CLC： TU444
- Online First：09 February 2021，
  
  Published：2021
- 稿件说明：
移动端阅览
AN Ning, YAN Chang-gen, WANG Ya-chong, et al. Experimental study on anti-erosion performance of polypropylene fiber-reinforced loess[J]. 2021, 42(2): 501-510.
DOI：

AN Ning, YAN Chang-gen, WANG Ya-chong, et al. Experimental study on anti-erosion performance of polypropylene fiber-reinforced loess[J]. 2021, 42(2): 501-510. DOI： 10.16285/j.rsm.2020.0879.

摘要

以聚丙烯纤维加筋黄土在黄土边坡坡面防护中的应用推广为研究背景，探讨了聚丙烯纤维加筋黄土的抗侵蚀性能及坡面防护效果。基于室内试验，研究了纤维长度和纤维掺量对加筋黄土抗剪强度、抗崩解性和渗透系数的影响规律，并基于试验获得的加筋黄土最佳配合比，开展降雨冲刷模型试验。结果表明：聚丙烯纤维的掺入可有效提高黄土的抗剪强度和抗崩解性，随着纤维掺量的增加和长度的增长，加筋黄土的黏聚力和崩解速率均呈现出先减小后增大的变化趋势，当纤维长度为15 mm、掺量为0.5%时，加筋土的抗剪强度和抗崩解性达到最优，相比于素黄土，加筋黄土的黏聚力提升了135.3%、崩解速率降低了91.7%；纤维的掺入提升了黄土的渗透系数，聚丙烯纤维加筋黄土的饱和渗透系数随着纤维掺量的增加而增大，随着纤维长度的增大而减小；聚丙烯纤维加筋黄土的坡面防护效果明显，当边坡坡比分别为1:1.5、1:1、1:0.75时，相比于无防护边坡，其冲刷速率分别降低了90%、90.4%和87.3%，累计冲刷量分别降低了85%、85.5%和83.6%。

Abstract

Based on the application and promotion of polypropylene (PP) fiber-reinforced loess in loess slope protection

the anti-erosion performance and slope protection effect of polypropylene fiber-reinforced loess were discussed. A series of laboratory experiments was conducted to study the effects of fiber length and fiber content on the shear strength

disintegration resistance

and permeability coefficient of reinforced loess. Based on the optimum mixture ratio of fiber-reinforced loess obtained by the test

the rainfall scouring model test was carried out. The results showed that the PP fiber could effectively improve the shear strength and disintegration resistance of loess. With the increase of fiber content and fiber length

the cohesion and disintegration rate of fiber-reinforced loess decreased first and then increased. When the fiber length was 15 mm and the fiber content was 0.5%

the shear strength and disintegration resistance of the fiber-reinforced loess were optimized. Compared with plain loess

the cohesion of fiber-reinforced loess increased by 135.3% and the disintegration rate decreased by 91.7%. The permeability coefficient of loess was improved by adding polypropylene fiber. The saturated permeability coefficient of PP fiber-reinforced loess increased with the increase of fiber content

but decreased with the increase of fiber length. The slope protection effect of PP fiber-reinforced loess was obvious. When the slope ratio was 1:1.5

1:1 and 1:0.75

compared with the unprotected slope

the scour rate of protected slope was reduced by 90%

90.4% and 87.3%

respectively

and the cumulative scour amount of protected slope was reduced by 85%

85.5% and 83.6%

respectively.

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