新型功能材料生态护坡现场试验研究

Field Test and Monitoring a Rocky Slope Stabilization with New Materials in Bio-Engineering

选取深圳市龙城中专后山典型岩质边坡作为新型功能材料生态护坡现场试验点,介绍了基于新型功能材料及其生态护坡施工工艺,设置现场试验对比组,对现场环境、植被长势及土壤性质进行长期监测和对比研究。半年多的现场试验表明：坡面土壤施加功能材料后,能有效提高植被发芽率,缩短出芽时间,促进植株和根系快速生长,加快坡面植被覆盖速率,提高边坡抗冲刷侵蚀能力,增强坡面浅层土体的稳定性。土壤性质监测结果表明：施加功能材料后,坡面土壤pH值范围为7.0～7.5,土壤温度在阴雨天提升0.56°C,在高温炎热天气下降低0.3°C;土壤含水率提高10.1%～16%;土壤活性有机质含量提升31%,土壤电导率提升11.5%,土壤氧气含量提升2%,二氧化碳含量降低30.6%;土壤紧实度降低27.6%。在土壤中施加新型功能材料的方法,是南方岩质边坡生态护坡技术未来研究和发展的方向。

This paper presents a case history the bio-engineering method by implementing a new material with better functions for the stabilization of a rock slope site,which was selected in the backside campus of Longcheng Secondary Vocational College.The bio-engineering slope stabilization construction methods and new bio-engineering materials are introduced in the paper.The test site had a comparison groups to monitor the effect of new bio-engineering material with site environment the vegetation growing,and soil properties.After the six months monitoring,the following results were observed：After applying the new material on the top soils,the vegetation germination rates and time were improved;both the stems and roots of the vegetation grew more rapidly to enhance the slope erosion resistance and shallow soil stability.After applying the new material,the soil property monitoring results indicate the pH value at the slope was between 7.0 and 7.5.Temperature in the soil increased average of 0.56 Celsius degrees in the cloudy and rainy days and decreased average 0.3 Celsius degrees at the sunny days in summer.The soil activity organic content and electrical conductivity developed by 31% and 11.5% respectively;the soil oxygen content increased by 2% while the soil carbon-dioxide content decreased by 30.6%.Moreover,the degree of soil compaction declined by 27.6%.The new bio-engineering material can improve the rocky slope stability with cost effective and environmental friendly advantages.It can improve the moisture and thermal activities of top soil and enhance the vegetation growth.