净化城市径流的柔性排护岸技术研究

设计了对沿岸坡径流而下的雨水有强化净化作用的柔性排护岸,该结构充分利用了城市岸坡普遍具有一定坡度和落差的特点,将大孔隙混凝土砖的砖间隙作为布水通道,实现了径流雨水在排体内植物和骨料间逐层阻滞后的深度渗滤,强化了对径流雨水的阻滞作用和渗滤强度.配合比优化试验、植物种植试验和工业化生产中试等试验表明,该排体材料可保证植物生长,在强度上可满足护岸要求,并可进行规模化生产.该结构对径流污水有较好净化效果好,整洁美观,运行成本低,维护简单,不占用土地,在我国有很高的推广应用价值.

Research on technology of flexible concrete mattress revetment for purification of urban runoff

A flexible concrete mattress revetment for enhanced purification of rain-water from the runoff along slope of river bank is designed herein,for which the characteristics of urban banks those have certain slopes and water drops are fully utilized for the structure and the clearances in between large pored concrete bricks are taken as the water distribution passages.This kind of revetment realizes the deep filtering of the rain-water runoff after the gradual retardation in layers from the grass planted in the mattress revetment and the aggregate of the brick,and then enhances the retardation effect on the rain-water runoff and the filtering intensity of it.It is indicated from the test of optimized mixing ratio of the concrete,the planting test of grass and the pilot test on industrialized production of the revetment that the mattress revetment can not only ensure the growth of grass and meet the requirement of river bank protection,but can also be built with industrialized production.On the whole,the structure has a better purification effect on the runoff sewage with the merits such as neat and nice looking,lower operation cost,simple maintenance,less land occupation etc.,and then can be widely popularized in China.