Liu Yifei, Ni Junjun, Gu Jiayu, Liu Shusen, Huang Yi, Sadeghi Hamed
Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 211189, China.
Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 211189, China; State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou 510641, China.
Sci Total Environ. 2024 Dec 1;954:176535. doi: 10.1016/j.scitotenv.2024.176535. Epub 2024 Sep 25.
Soil reinforcement using eco-friendly biopolymer and vegetation has been increasingly popular in geotechnical engineering. However, research is still in its early stages due to complex biochemical interactions between biopolymers and plants. Moreover, under the increasing climate change, extreme weather poses severe challenges to the effectiveness of biopolymer-vegetation on soil treatment. Therefore, this paper provides a comprehensive review and summary of recent research on the influence of biopolymer and biopolymer-vegetation interaction on soil properties. First, this paper evaluates the various hydraulic and mechanical properties of soils after biopolymer treatment, including compaction characteristics, Atterberg limits, unconfined compressive strength, shear strength, tensile strength, permeability, water holding capacity, slaking behavior, and erosion resistance, as well as the influence of climate change. Then, the application of biopolymer-vegetation measure in the current field of soil treatment is summarized, and the biopolymer-vegetation interaction is discussed, including the influence of biopolymers on plant germination rate, growth conditions, wilting rate, and other indicators. Under drought and water scarcity conditions, biopolymers can improve soil mechanical strength and water retention, reducing plant wilting rate, and enhancing the survival ability of plants under extreme climate changes. Appropriate biopolymers can increase soil strength by >50 %, reduce strength and mass losses from dry-wet cycles to within 10 %, enhance grass seed germination rates by over 60 %, and reduce wilting rates under drought stress by 80 %. Finally, the research gaps and deficiencies in this field are highlighted, and potential research hotspots that can be strengthened and studied in the future are proposed. This review demonstrates the biopolymer-vegetation measure to be a new ecological restoration technology with widespread application prospects.
在岩土工程中，使用环保型生物聚合物和植被进行土壤加固越来越受到欢迎。然而，由于生物聚合物与植物之间复杂的生化相互作用，相关研究仍处于早期阶段。此外，在气候变化日益加剧的情况下，极端天气对生物聚合物 - 植被土壤处理效果构成严峻挑战。因此，本文对生物聚合物以及生物聚合物 - 植被相互作用对土壤性质影响的近期研究进行了全面综述和总结。首先，本文评估了生物聚合物处理后土壤的各种水力和力学性质，包括压实特性、阿太堡界限、无侧限抗压强度、抗剪强度、抗拉强度、渗透性、持水能力、崩解行为和抗侵蚀性，以及气候变化的影响。然后，总结了生物聚合物 - 植被措施在当前土壤处理领域的应用，并讨论了生物聚合物 - 植被相互作用，包括生物聚合物对植物发芽率、生长状况、萎蔫率等指标的影响。在干旱和缺水条件下，生物聚合物可以提高土壤机械强度和保水能力，降低植物萎蔫率，增强植物在极端气候变化下的生存能力。合适的生物聚合物可使土壤强度提高>50%，将干湿循环导致的强度和质量损失降低至10%以内，使草籽发芽率提高60%以上，并将干旱胁迫下的萎蔫率降低80%。最后，强调了该领域的研究差距和不足，并提出了未来可加强研究的潜在热点。本综述表明生物聚合物 - 植被措施是一种具有广泛应用前景的新型生态修复技术。
