直剪条件下根土复合体抗剪强度研究

Study on Shear Strength of Root-Soil Composites under Direct Shearing Condition

植株根系体量庞大,纯天然地形成于土壤表层,它不仅可以涵养水分,而且对土壤有加筋作用,因此植物根系对提高根土复合体的抗剪强度有十分积极的作用。为研究根土复合体的抗剪强度性能,采用控制变量的思维,对复合体试样进行直剪试验,测量并评估复合体的孔隙比、含根率以及含水率对复合体抗剪强度的具体影响效果,得出孔隙比、含根量以及含水量的最优化选择。这有利于推动"植株加固土壤"在具体工程中的应用,进而降低施工难度和成本,收获环保、经济、高效的多重社会效益。

The plant root system has a large volume and it is naturally formed on the surface of the soil. It can not only conserve water but also reinforce the soil. Therefore, the plant root system has a very positive effect on improving the shear strength of root-soil composites.In order to study the shear strength properties of the root-soil complexes, the control variables were used to perform a direct shear test on the composite samples. The specific effects of the pore ratio, the root ratio and the moisture content of the composites on the shear strength of the composites were tested and evaluated, and the optimal selection of void ratio, root volume and moisture content was obtained. This is conducive to promoting the application of ＂plant-enhanced soil＂ in specific projects, thereby reducing construction difficulties and costs,and gaining multiple social benefits of environmental protection, economy and efficiency.