生态混凝土植生与抗冲刷性能研究

Study on Planting Performance and Scouring Resistance of Eco-Concrete

通过设计生态混凝土植生试验以及包含3种坡面状况、4种边坡坡度、3种降雨强度的冲刷试验对生态混凝土的植生性能及其与植物结合后的抗冲刷性能展开研究。植生试验结果表明:植生20天时,生态混凝土组植株最高为22.5 cm,植物斑化指数为95.37%,植物覆盖率为102.6%,生态混凝土组与素土组的植物茎叶生长状况相差不大,但素土组植物根系普遍更长;植生40天时,两组根系分布范围接近。冲刷试验结果表明:素土边坡与生态混凝土覆土边坡的土体流失量在特定条件下会随降雨累积量的增加产生激增,而生态混凝土植生边坡的土体流失量在各条件下均未激增;相同冲刷条件下抗冲刷性能为生态混凝土植生边坡>生态混凝土覆土边坡>素土边坡。

Through designing eco-concrete planting tests and scouring tests containing three slope conditions,four slope gradients,and three rainfall intensities,the planting performance of eco-concrete and its scouring resistance after combining with plants were studied.The planting test results show that at 20 d of planting,the plant height of eco-concrete planting group is up to 22.5 cm,the plant spotting index is 95.37%and the plant coverage is 102.6%.The plant stem and leaf growth conditions of the eco-concrete planting group and plain soil planting group are not significantly different,but the plant root in plain soil planting group is generally longer.At 40 d of planting,the root distribution of the two groups is close in extent.The scouring test results show that soil loss in plain soil slope and eco-concrete cladding slope can produce a surge with the increase of rainfall accumulation under specific conditions,while soil loss from eco-concrete planting slope does not surge under all experimental conditions.The scouring resistance under the same scouring condition is eco-concrete planting slope>eco-concrete cladding slope>plain soil slope.