一种植入型生态护坡的制备工艺及施工方法

工程材料覆盖物护坡和传统的生态护坡均会一定程度上扰动河流边坡，改变原有的生境，使河流生态系统面临不同程度的危机.针对这一问题，研究开发了一种植入型生态护坡配方工艺和施工方法:以城市污水处理厂剩余污泥为主要原料，氧化钙和氯化镁作为微生物灭活剂和胶凝剂，混合草种制成“植入泥浆”，采用泥浆泵加压，应用直径为10cm的高速旋转(1000r/min)喷射头在地表以下10~50cm深度范围内注入“植入泥浆”.“植入泥浆”内的草种发芽，经过约20天的生长后形成生态护坡.对比试验表明，这种方法一方面利用剩余污泥的保水性能和肥效，另一方面采用独特的地表下旋喷植入工艺，对河流边坡表层土壤扰动很小，在保持河道边坡稳定的同时，很好地保护生境，有利于河流生态系统持续健康发展.

A Preparation Technology and Construction Method of Implantable Ecological Slope Protection

The slope protection made of engineering materials or the traditional ecological slope protection will disturb river slopes to a certain extent， which will change the original habitat and endanger the river ecological system at different levels.Aiming at this problem， a new type of implantable ecological slope protection was developed. This kind of slope protection is mainly made of surplus sludge from municipal sewage treatment plants. CaO and MgCl₂were used as the microbial inactivating agent and gelatinizing agent. The above materials were mixed with appropriate grass seeds and certain amounts of water to produce implantation mud(IM).Driven by pumps， the IM was injected into the soil under the earth surface from 10cm to 50cm through a rapidly rotating(1000r/min) injector. The grass seeds would sprout in the IM. About 20 days later， the grass would grow and the ecological slope protection would come into being. On the one hand， this method could take advantage of the surplus sludge’s water-retaining property and fertilizing effect; on the other hand， the special rotating injection technology was expected to have less disturbance to the surface soil. Therefore， this kind of ecological slope protection could not only keep slope stability but also conserve habitats perfectly， which would be beneficial for the sustainable and healthy development of the river ecosystem.