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笔者在多年水土保持监测工作中发现,高速公路、河道等基础设施广泛采用的六角空心砖护坡技术普遍存在着严重的土壤流失问题,根据对该类工程大量实际监测计算,土壤流失强度达(1.5万～6.0万)t/km2.a。目前,这种形式的水土流失还未引起人们的重视,其直接危害是影响边坡稳定,造成土壤资源的浪费,而且给排水系统以及河道、湖库造成了大量的泥沙淤积,并缩短其使用年限。为解决这种“隐蔽”的水土流失危害,开展了“坡改平”生态护坡技术的研发。通过应用“坡改平”生态护坡技术,把不稳定的坡面分解为若干个小的稳定水平面,使坡面土壤达到稳定,从而控制土壤流失,并通过草—灌—乔相结合的植被防护体系,丰富坡面绿化设计的内容和空间,为生态护坡提供一种新的解决方案。
During many years of soil and water conservation monitoring, the author found that there is a serious problem of soil erosion in hexagonal hollow brick revetment widely used in infrastructure such as expressways and rivers. According to a large number of actual monitoring and calculation of such projects, the intensity of soil erosion reaches 15,000 ~ 60,000) t / km2.a. At present, this form of soil and water loss has not drawn the attention of people. Its direct harm affects the stability of the slope, resulting in the waste of soil resources. It also causes a large amount of sediment deposition and shortening of the drainage system and the rivers and lakes. Use life. In order to solve this “hidden” soil and water loss hazards, carried out “slope change flat” ecological slope protection technology research and development. Through the application of “slope to level” eco-slope protection technology, the unstable slope is decomposed into a number of small stable levels to stabilize the slope soil to control soil erosion and through the grass-irrigation-Qiao combination Vegetation protection system enriches the content and space of the slope greening design and provides a new solution for ecological slope protection.