Ryegrass root-soil composites mechanical properties and its slope stability: Experimental study and numerical analysis.

IF 2.1 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Zhibo Zhang, Angran Tian, Yu Zhou, Chuanjin Ding, Qiang Tang
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引用次数: 0

Abstract

Urbanization and infrastructure projects generate huge amount of construction and demolition waste (CDW), posing significant challenges for the environment and human health. In order to reduce the environment and safety risks caused by the CDW landfills, this study was amid to utilize plant roots to develop a root-CDW-soil system for strengthening the CDW and enhancing the slope stability of CDW landfills. A series of experimental analyses were conducted, focusing on shear tests of root-soil composites under various moisture conditions and root content ratios. The results indicate that the inclusion of ryegrass roots plays a critical role in significantly enhancing the shear strength of the soil, and the soil samples reinforced with 0.6 g of ryegrass roots exhibited a shear strength increase of up to 35% compared to the unreinforced samples. The slope stability treated by the plant roots was evaluated by finite element simulations under different rainfall conditions. The factor of safety (FoS) for reinforced slopes increased from 1.18 to 1.59 after five days of heavy rainfall (480 mm/d), highlighting the significant improvement in stability provided by the root systems. These findings suggest that the root-soil system offers a sustainable solution for slope management, reducing risks associated with construction waste and extreme weather conditions.Implications: Urbanization and infrastructure projects generate significant waste, posing environmental and safety challenges. This study investigates the enhancement of slope stability through the integration of ryegrass root systems. The findings indicate that ryegrass roots substantially improve soil shear strength and overall slope stability. Furthermore, the study demonstrates that these root systems enhance resilience to heavy rainfall, thereby mitigating the risk of slope failure. These results suggest that plant root systems offer a sustainable solution for slope management, effectively addressing environmental concerns related to construction waste and extreme weather conditions. This research provides a comprehensive understanding of the physical and mechanical properties of root-soil composites, thereby promoting their practical application in slope stabilization.

城市化和基础设施项目产生了大量的建筑和拆除废物(CDW),给环境和人类健康带来了重大挑战。为了降低建筑垃圾填埋场带来的环境和安全风险,本研究旨在利用植物根系开发根系-建筑垃圾填埋场-土壤系统,以加固建筑垃圾填埋场并增强其边坡稳定性。研究人员进行了一系列实验分析,重点是在不同湿度条件和根系含量比例下对根系-土壤复合材料进行剪切试验。结果表明,黑麦草根的加入对显著提高土壤的剪切强度起到了关键作用,与未加固的土壤样品相比,添加了 0.6 克黑麦草根的土壤样品的剪切强度提高了 35%。在不同降雨条件下,通过有限元模拟对植物根处理过的斜坡稳定性进行了评估。经过五天的强降雨(480 毫米/天)后,加固斜坡的安全系数(FoS)从 1.18 提高到 1.59,这表明根系系统显著提高了斜坡的稳定性。这些研究结果表明,根土系统为斜坡管理提供了一种可持续的解决方案,降低了与建筑垃圾和极端天气条件相关的风险:影响:城市化和基础设施项目会产生大量废物,对环境和安全构成挑战。本研究探讨了通过整合黑麦草根系增强斜坡稳定性的问题。研究结果表明,黑麦草根系可显著提高土壤抗剪强度和整体边坡稳定性。此外,研究还表明,这些根系能增强对暴雨的抵御能力,从而降低斜坡坍塌的风险。这些结果表明,植物根系为边坡管理提供了一种可持续的解决方案,可有效解决与建筑垃圾和极端天气条件相关的环境问题。这项研究让人们全面了解了根土复合材料的物理和机械特性,从而促进了它们在边坡稳定方面的实际应用。
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来源期刊
Journal of the Air & Waste Management Association
Journal of the Air & Waste Management Association ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
5.00
自引率
3.70%
发文量
95
审稿时长
3 months
期刊介绍: The Journal of the Air & Waste Management Association (J&AWMA) is one of the oldest continuously published, peer-reviewed, technical environmental journals in the world. First published in 1951 under the name Air Repair, J&AWMA is intended to serve those occupationally involved in air pollution control and waste management through the publication of timely and reliable information.
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