香根草—铰链式混凝土块护岸系统机理分析

Analysis of mechanism of Vetiveria zizanioides-hinge jointed concrete bank protection system

铰链式混凝土块护面系统因为对小规模变形具有高度的适应性,本身强度、密实度大,具有很强的抗冲击能力而被护岸工程广泛运用。香根草具有纵深发达的根系系统,具有较高的锚固力和抗剪力。通过在开孔的铰链式混凝土块铺面系统中种植香根草,其根系在基土中盘根错节,使基础土体成为土与草根的复合材料,草根可视为三维加筋材料,使土体强度提高;更有利于护岸防冲系统的稳定。基于条分法的基本原理,对根系加固堤岸机理进行了较为详尽的分析。

Hinge jointed concrete facing system is extensively used in bank protection engineering because of its good applicability to small-scale deformation and its high strength, intense compactness and strong shock resistance. Vetiveria zizanioides with strong deep roots have better anchoring force and shear resistance. Vetiveria zizanioides grow in ringent hinge jointed concrete extending system, and its roots are interlaced and make foundation soil into compound materials of soil and roots, but grass roots are considered as three-dimensional reinforced materials which increase soil strength and the stability of bank protection. Based on the theory of slice method, the mechanism of reinforcement with roots is analyzed.