海水入侵地区滨岸生态护坡植被抗剪性能试验研究

Experimental study on shear resistance of ecological slope protection vegetation in seawater intrusion coastal area

海水入侵对河口海岸的生态功能造成了极大危害,采用生态护坡工程配套技术,将生态护坡植被防止水土流失和生态修复的作用真正应用于海水入侵地区的研究较少。从根系提高土体抗剪强度的角度出发,选取灌木的柽柳根系作为试验材料,通过室内直剪试验,探讨了根土复合体中含根量、含水量以及根系径级的变化对土体抗剪强度的影响,研究成果可为植被固土护坡的机理研究提供参考依据,对滨岸地区采用生态护坡技术防治海水入侵的研究具有重要的指导意义。

Seawater intrusion was a great harm to the ecological functions of the estuarine and coastal,ecological slope protection technology was used widely.However,there was a little previous literature on the study about ecological slope protection vegetation′s function on renovating ecological environment and preventing water loss and soil erosion in Seawater Intrusion area.This paper mainly embarks from the plants roots′act on improving shear strength of soil,choosed bush′s tamarix roots as experiment materials,direct shear test had been carried out in laboratory,several influencing factor to root-soil composite′s function on soil′s shear strength was approached,such as the root content,liquid water content and diameter grades structure of root.This study supplied some theoretical foundation for the study of root reinforcement of soil′s mechanism,could be a guide to the sdudy to prevent seawater intrusion by using ecological slope protection technology at coastal areas.