绿色基础设施中土体-植物-纤维-水-大气相互作用的基本机理

With the rapid urbanization development and increasing demands for the environment-friendly materials, the application of natural materials, for example biochar and plant fiber, in green geotechnical infrastructures attract more attentions. Previous studies mainly focussed on analysing vegetation or natural fiber reinforcement effects. Though, there are some studies on hydrological effects of vegetation, but they are conducted either for short term (Without considering age of plant, vegetation leaf/root characteristics) and also without presence of fiber. Fibers can help to stabilize soil, which can help to grow plants. Further, fiber degradation in long term can provide organic content to soil, that can help vegetation to establish in long term. This study aims to use vegetation including natural materials (such as fiber) as the engineering material to improve the water retention, strength and stability of green geotechnical infrastructures. The objectives within the study will be to (1) investigate bio-physical processes within soil-plant-fiber-water-atmospheric interaction; (2) Investigate water retention and strength properties of soil-plant-fiber composites in long term considering bio-degradation of fiber and plant age and (3) Investigate influence of vegetation root/leaf characteristics such as leaf area/root area on soil-plant-fiber composites. This study will thoroughly aims to reveal fundamental mechanism of soil-plant-fiber-water-atmospheric interaction so as to provide scope for theoretical developments for modeling soil-plant-fiber properties in bio-engineered slopes. Since, fibers are developed from invasive water hyacinth, it will also provide basis of alternate waste management approach.

生物炭和植物纤维等天然材料在绿色岩土基础设施中的应用受到越来越大的重视。已有研究集中在分析植被或天然纤维的加固效应。虽然有一些关于植被水力学效应的研究，但这些研究要么短期的要么没有研究植物纤维的影响。植物纤维不仅可以提高土体的稳定性，而且其长期降解可提高土壤的有机质含量，从而有助于植被生长。本研究旨在将植被和纤维等天然材料作为工程材料以提高绿色岩土基础设施的保水性，强度和稳定性。研究目标如下：（1）分析土体-植物-纤维-水-大气相互作用中的生物-物理过程；（2）揭露纤维生物降解和植物年龄对土壤-植物纤维复合材料持水性和强度的长期影响机理；（3）研究植被根/叶特性（如叶面积/根面积）对土壤-植物纤维复合材料的影响规律。本研究通过揭露土体-植物-纤维-水-大气相互作用的基本机理，为生物工程边坡土体-植物-纤维特性模拟提供理论依据。鉴于纤维提取于入侵杂草凤眼蓝，这将为此废物处理方法提供基础。

生物炭和植物纤维等天然材料在绿色岩土基础设施中的应用受到越来越大的重视。虽然有一些关于植被水力学效应的研究，但这些研究要么短期的要么没有研究植物纤维的影响。植物纤维不仅可以提高土体的稳定性，而且其长期降解可提高土壤的有机质含量，从而有助于植被生长。本项目研究内容主要包括生物炭改良土壤、植被土壤保水性能研究；生物炭改良土壤抗裂抗侵蚀性能研究；植物健康状态检测技术；农业用吸水聚合物改良土壤性能研究等。研究表明生物炭在绿色基础设施中有着良好的应用前景，例如垃圾填埋场，生物炭的加入可以有效地减少裂缝提高土壤稳定性，此外生物炭的保水性能优异，可用于绿色屋顶蓄雨。在本研究中植被减轻边坡破坏的相关机制进行了深入探讨。有关植物健康状态检测技术、植物最佳生长和死亡的临界吸力的研究成果，可用于干旱地区去荒漠化植物的精确灌溉。

内容获取失败，请点击重试