路堑边坡植被防护固土效果室内外试验

选取土工格室、三维网垫和铁丝网3种建植方式以及高羊茅与百喜草两种草种进行室内边坡模拟建植与防护抗冲刷试验.试验结果表明,不同草种对应的固土效果均为土工格室最好,铁丝网最差;相同降雨强度下边坡冲刷量随坡角的增大而减小;百喜草抗冲刷能力优于高羊茅,百喜草常青期约300d左右,较高羊茅少40d.现场植被生长试验表明,播种后100d内,高羊茅根系生长速度大于白三叶,此后,白三叶根系生长速度超过高羊茅,且根系长度比高羊茅大,高羊茅株高一直大于白三叶;试验前三个月,百喜草根系长势强于狗牙根,此后狗牙根根系长于百喜草,百喜草株高一直低于狗牙根.

Solidify effect of cut slope ecology protection with indoor and outdoor tests

The indoor protection anti-scouring tests are done with three planting methods and two grasses.Three building ways are the geocell,three dimensional nets and wire netting.Two grasses are festuca and bahia.Through the indoor slope simulation washout test,the solidify effect of geocell is the best to three different grasses.And the wire netting is the worst.The soil erosion quality reduces with the addition of slope angle under the same raining intensity.The anti-scouring ability of bahia is better than festuca.The evergreen time of bahia is three hundred days,which is fourty days less than festuca.The outdoor test results show that the root grown speed of festuca is higher than white clover during one hundred days after planting.But later the root grown speed of white clover is higher than festuca.It is the same with bahia and bermuda grass.First is bahia,then it is bermuda grass.During the test,the plant height of festuca and bermuda grass is bigger than white clover and bahia.