Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Tokyo, Japan.
J Environ Manage. 2024 May;359:120970. doi: 10.1016/j.jenvman.2024.120970. Epub 2024 Apr 26.
Changes in land use significantly impact landslide occurrence, particularly in mountainous areas in northern Thailand, where human activities such as urbanization, deforestation, and slope modifications alter natural slope angles, increasing susceptibility to landslides. To address this issue, an appropriate method using soilbags has been widely used for slope stabilisation in northern Thailand, but their effectiveness and sustainability require assessment. This research highlights the need to evaluate the stability of the soilbag-based method. In this study, a case study was conducted in northern Thailand, focusing on an area characterised by high-risk landslide potential. This research focuses on numerical evaluation the slope stability of soilbag-reinforced structures and discusses environmental sustainability. The study includes site investigations using an unmanned aerial photogrammetric survey for slope geometry evaluation and employing the microtremor survey technique for subsurface investigation. Soil and soilbag material parameters are obtained from existing literatures. Modelling incorporates hydrological data, slope geometry, subsurface conditions, and material parameters. Afterwards, the pore-water pressure results and safety factors are analysed. Finally, the sustainability of soilbags is discussed based on the Sustainable Development Goals (SDGs). The results demonstrate that soilbags effectively mitigate pore-water pressures, improve stability, and align with several SDGs objectives. This study enhances understanding of soilbags in slope stabilisation and introduces a sustainable landslide mitigation approach for landslide-prone regions.
土地利用的变化会显著影响滑坡的发生，特别是在泰国北部的山区，人类活动如城市化、森林砍伐和边坡改造改变了自然边坡角度，增加了滑坡的易发性。为了解决这个问题，一种使用土袋的适当方法已经在泰国北部广泛用于边坡稳定，但需要评估它们的有效性和可持续性。本研究强调了评估基于土袋方法稳定性的必要性。在这项研究中，在泰国北部进行了一个案例研究，重点是一个具有高滑坡风险的地区。本研究专注于数值评估土袋加固结构的边坡稳定性，并讨论环境可持续性。该研究包括使用无人机摄影测量调查进行边坡几何形状评估的现场调查，并采用微震调查技术进行地下调查。土壤和土袋材料参数取自现有文献。模型结合了水文数据、边坡几何形状、地下条件和材料参数。然后，分析孔隙水压力结果和安全系数。最后，根据可持续发展目标 (SDGs) 讨论土袋的可持续性。研究结果表明，土袋可有效减轻孔隙水压力，提高稳定性，并符合几个可持续发展目标的目标。本研究增强了对边坡稳定中土袋的理解，并为易发生滑坡的地区引入了一种可持续的滑坡缓解方法。
