Hydromechanical behaviour of a slope reinforced by grass roots under rainfall conditions

IF 3.9 2区环境科学与生态学 Q1 ECOLOGY

Ecological Engineering Pub Date : 2024-10-16 DOI:10.1016/j.ecoleng.2024.107427

Gayuh Aji Prasetyaningtiyas , Viroon Kamchoom , Anthony Kwan Leung , Suched Likitlersuang

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引用次数: 0

Abstract

Soil bioengineering using vegetation has been considered an environmentally friendly solution to improve slope stability. Although several studies have demonstrated the contribution of vegetation to slope stability, a gap in understanding the mechanisms of grass root–soil interactions under rainfall conditions remains. This study investigates the effects of the roots of vetiver grass (Chrysopogon zizanioides) on the hydromechanical behaviour of an unsaturated soil slope using the centrifuge modelling technique. The changes in pore water pressure and slope deformation were monitored during the test. The monitored data were subsequently back-analysed and interpreted using seepage–stability analyses. In addition, this study focused on evaluating the effect of roots on slope stability, considering safety and pore water pressure during rainfall. Results revealed that the vetiver roots remarkably affected the initial suction of the slope by increasing the soil's air-entry value. The increased suction and the additional cohesion provided by the roots enhanced slope stability under rainfall conditions.

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降雨条件下草根加固斜坡的水力学特性

利用植被进行土壤生物工程一直被认为是改善边坡稳定性的环保解决方案。尽管多项研究已证明植被对边坡稳定性的贡献，但在了解降雨条件下草根与土壤的相互作用机制方面仍存在差距。本研究利用离心机建模技术研究了香根草（Chrysopogon zizanioides）根系对非饱和土壤边坡水力学行为的影响。试验期间监测了孔隙水压力和边坡变形的变化。随后，利用渗流稳定性分析对监测数据进行了反分析和解释。此外，这项研究还重点评估了根系对斜坡稳定性的影响，同时考虑了降雨期间的安全性和孔隙水压力。结果显示，香根草根系通过增加土壤的空气进入值，显著影响了斜坡的初始吸力。根系增加的吸力和额外的内聚力增强了降雨条件下斜坡的稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ecological Engineering 环境科学-工程：环境

CiteScore

8.00

自引率

5.30%

发文量

293

审稿时长

57 days

期刊介绍： Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. The journal is meant for ecologists who, because of their research interests or occupation, are involved in designing, monitoring, or restoring ecosystems, and can serve as a bridge between ecologists and engineers. Specific topics covered in the journal include: habitat reconstruction; ecotechnology; synthetic ecology; bioengineering; restoration ecology; ecology conservation; ecosystem rehabilitation; stream and river restoration; reclamation ecology; non-renewable resource conservation. Descriptions of specific applications of ecological engineering are acceptable only when situated within context of adding novelty to current research and emphasizing ecosystem restoration. We do not accept purely descriptive reports on ecosystem structures (such as vegetation surveys), purely physical assessment of materials that can be used for ecological restoration, small-model studies carried out in the laboratory or greenhouse with artificial (waste)water or crop studies, or case studies on conventional wastewater treatment and eutrophication that do not offer an ecosystem restoration approach within the paper.