三维植被网加筋草皮坡面土壤侵蚀试验研究

为研究植草型生态护坡的抗坡面侵蚀性能,对比设置三维植被网加筋材料前后草皮护坡的植被防护效果,探讨加筋材料提高草皮抗侵蚀性能的作用机理,在实验室内进行了草皮护坡坡面冲刷模型试验.试验结果表明:当坡面流流速大于2 m/s时,天然草皮的侵蚀模数较之裸露边坡平均减小了90%以上,草皮防护作用随流速的增大而减弱;设置三维土工网垫后,加筋草皮的侵蚀模数较之纯草皮减小了50%以上,防护优势随着流速的增大愈加显著;天然草皮能有效地控制坡面侵蚀,设置三维植被网加筋材料可以大大提高草皮的防护效果,其作用机理表现在边坡土体加筋作用、覆盖防护作用、增强草皮侧向连续性3个方面.

Experimental research on soil erosion of turf slope reinforced by 3D vegetation net

Laboratory model experiments on slope scouring were performed to investigate the erosion-resisting characteristics of ecological slope protection.The effects of turf slope protection before and after reinforcement by 3D vegetation net were compared,and the mechanism of erosion-control by reinforced material was studied.The experimental results show that,when the flow velocity along the slope is over 2m/s,the natural turf protection reduces the erosion modulus of slope by over 90%,and the effect of slope protection weakens with the increase of flow velocity,meanwhile the setting of 3D vegetation net further reduces the erosion modulus by over 50%.Therefore,the natural turf has great effects on slope erosion-control and 3D vegetation net can greatly improve the effect of slope protection.The mechanism of slope protection by 3D vegetation net was described as the following aspects: reinforcement of slope soil,coverage and protection of slope soil,enhancement of side-continuity of turf.