石质边坡防护中生态植被毯水土保持效果研究

Soil and water conservation effect of ecological vegetation blanket for rocky slope

为研究石质边坡生态植被毯防护坡面的水土保持效果,在某高速公路施工现场软弱岩石边坡、碎石边坡段设置植被毯防护区和自然撒播草籽防护对照区,分不同时段对各区植被覆盖度、根系土壤根密度、崩解时间、地表径流量及土壤流失量等与水土保持相关的参数进行了测定,并对实测数据进行了对比分析。结果表明:软弱石质坡面采用生态植被毯防护技术,可增加植被覆盖度,减少地表径流量和土壤侵蚀量,有效控制水土流失,水土保持效果明显优于直接撒播草籽护坡。该技术在同类边坡防护工程中具有较高的推广价值。

In order to investigate the soil and water conservation effect of ecological vegetation blanket for rocky s lope, a series of comparative tests aiming at vegetation blanket area and naturally broadcasting sowing grass seeds area were conducted for soft rocky slope and rubble rocky slope at a highway construction field. In the tests, some parameters were measured and compared for the two contrast areas, including vegetation coverage ratio, soil root density, collapsing time, ground runoff, soil erosion quantity. The results show that for the soft rocky slope, the vegetation blanket has superior conservation effect than the method of naturally broadcasting grass seeds in terms of increasing vegetation coverage ratio, reducing ground runoff and soil erosion.