Experimental Research on Permeability and Strength of Grassroots-reinforced Soil

王元战; 刘旭菲; 张智凯

doi:10.13409/j.cnki.jdpme.2017.01.020

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Experimental Research on Permeability and Strength of Grassroots-reinforced Soil

更新时间：2025-12-11

- Experimental Research on Permeability and Strength of Grassroots-reinforced Soil
- Vol. 37, Issue 1, Pages: 140-147(2017)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.2017.01.020
  CLC： U43
- Published：2017
- 稿件说明：
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[1]王元战,刘旭菲,张智凯.草根加筋土渗透性和强度试验研究[J].防灾减灾工程学报,2017,37(01):140-147.

王元战, 刘旭菲, 张智凯. Experimental Research on Permeability and Strength of Grassroots-reinforced Soil[J]. 2017, 37(1): 140-147.
[1]王元战,刘旭菲,张智凯.草根加筋土渗透性和强度试验研究[J].防灾减灾工程学报,2017,37(01):140-147. DOI： 10.13409/j.cnki.jdpme.2017.01.020.

王元战, 刘旭菲, 张智凯. Experimental Research on Permeability and Strength of Grassroots-reinforced Soil[J]. 2017, 37(1): 140-147. DOI： 10.13409/j.cnki.jdpme.2017.01.020.

摘要

通过重塑素土与草根加筋土的三轴渗透剪切试验

分析草根对土体渗透性和强度的影响。结果表明:渗透对素土和草根加筋土的强度均具有弱化效应

弱化幅度随水力比降的增大而提高

但围压的增大可以缓解该弱化作用;重塑素土和草根加筋土的内摩擦角随水力比降的增大变化规律不明显

而粘聚力随水力比降的增大呈明显的降低趋势;通过渗透工况下重塑素土和草根加筋土粘聚力及破坏强度的对比

得出根系的存在可以有效提高土体抵抗渗透破坏的能力;考虑渗透对草根加筋土强度破坏的临界深度随水力比降的变化关系为幂函数形式。

Abstract

The seepage caused by water level change is one of the important factors that cause slope instability.In order to prevent instability

based on the principle of environmental protection

vegetation planting is applied to slope protection engineering.Through triaxial seepage shear tests of remolded soil and remolded grassroots-reinforced soil（RS and RGRS）

the influence of grassroots on permeability and strength were analyzed.The laboratory test results show that:（1）The seepage can weaken the strength of RS and RGRS.The weakening extent increases with increasing hydraulic gradient.However

with the increase of confining pressure

the weakening extent reduces.（2）The internal friction angles of RS and RGRS don’t change obviously with increasing hydraulic gradient

while the cohesions reduce.（3）By comparing the cohesion as well as failure strength of RS and those of RGRS

it can be concluded that the roots can improve the ability of soil resisting seepage damage.（4）The power function is presented to characterize the depth of considering the seepage damage to the strength of grassroots reinforced soil with hydraulic gradient change.

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references

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