Zhang Zhibo, Tian Angran, Zhou Yu, Ding Chuanjin, Tang Qiang
School of Rail Transportation, Soochow University, Suzhou, People's Republic of China.
Department of Civil Engineering, The University of Hong Kong, Hong Kong, People's Republic of China.
J Air Waste Manag Assoc. 2025 Feb;75(2):164-179. doi: 10.1080/10962247.2024.2436531. Epub 2025 Jan 24.
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.: 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CDW填埋场对环境和安全造成的风险，本研究旨在利用植物根系开发一种根系 - CDW - 土壤系统，以加固CDW并提高CDW填埋场的边坡稳定性。进行了一系列实验分析，重点是在各种湿度条件和根系含量比下对根系 - 土壤复合材料进行剪切试验。结果表明，黑麦草根系的加入在显著提高土壤抗剪强度方面起着关键作用，与未加固的样品相比，用0.6克黑麦草根系加固的土壤样品抗剪强度提高了35%。通过有限元模拟评估了不同降雨条件下植物根系处理后的边坡稳定性。在暴雨（480毫米/天）持续五天后，加固边坡的安全系数（FoS）从1.18提高到1.59，突出了根系系统在稳定性方面的显著改善。这些发现表明，根系 - 土壤系统为边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。：城市化和基础设施项目产生大量废物，带来环境和安全挑战。本研究调查了通过整合黑麦草根系系统提高边坡稳定性的情况。研究结果表明，黑麦草根系显著提高了土壤抗剪强度和整体边坡稳定性。此外，研究表明这些根系系统增强了对暴雨的抵御能力，从而降低了边坡失稳的风险。这些结果表明，植物根系系统为边坡管理提供了一种可持续的解决方案，有效解决了与建筑垃圾和极端天气条件相关的环境问题。本研究全面了解了根系 - 土壤复合材料的物理和力学性能，从而促进了它们在边坡稳定中的实际应用。
