一种典型的生物砖护岸结构抗冲性能物理模型试验研究
发布时间：2019-02-23 19:37
【摘要】：针对护坡工程及中小河流护岸建设中植被护坡抗冲性能问题,建立了深圳市葵涌河生物砖护岸结构的抗冲性能物理模型,基于有压管流最大可产生流速达6m/s,对生物砖结构进行冲刷试验。结果表明,对浸泡12h的生物砖,经3.2~5.8m/s流速冲刷12h后其抗冲性能表现良好,最大冲深为2~6cm;抗冲性能取决于水泥砖、营养土、植被之间的复合结构,其中水泥砖12cm×12cm内孔及4cm厚壁有效控制了向下螺旋流的发展,阻止了土壤冲坑的无限扩大;营养土可提高狗牙根草的植被成活率,提高植被密度;狗牙根草形成的植被覆盖层有助于减小水流对土壤的直接侵蚀。
[Abstract]:Aiming at the problem of slope protection performance of vegetation in slope protection engineering and bank revetment construction of medium and small rivers, a physical model of erosion resistance of biological brick revetment structure of Kwai Chung River in Shenzhen City is established. Based on the maximum velocity of 6 m / s produced by pressurized pipe flow, Scour test of biological brick structure was carried out. The results showed that the impact resistance of biological brick soaked for 12 h was good after 12 h scour with 3.2~5.8m/s flow rate, and the maximum impact depth was 2? 6 cm. The impact resistance depends on the composite structure of cement brick, nutritious soil and vegetation, in which 12cm 脳 12cm inner hole and 4cm thick wall effectively control the downward spiral flow and prevent the infinite expansion of soil scour. Vegetative soil can increase the vegetation survival rate and increase the vegetation density, and the vegetation cover formed by the grass can help to reduce the direct erosion of the soil caused by the water flow.
【作者单位】： 广东省水利水电科学研究院广东省水动力学应用研究重点实验室;广东省水利水电科学研究院河口水利技术国家地方联合工程实验室;深圳市水务工程建设管理中心;
【基金】：广东省水利科技创新项目(2016-12,2015-11)
【分类号】：TV861
本文编号：2429132
[Abstract]:Aiming at the problem of slope protection performance of vegetation in slope protection engineering and bank revetment construction of medium and small rivers, a physical model of erosion resistance of biological brick revetment structure of Kwai Chung River in Shenzhen City is established. Based on the maximum velocity of 6 m / s produced by pressurized pipe flow, Scour test of biological brick structure was carried out. The results showed that the impact resistance of biological brick soaked for 12 h was good after 12 h scour with 3.2~5.8m/s flow rate, and the maximum impact depth was 2? 6 cm. The impact resistance depends on the composite structure of cement brick, nutritious soil and vegetation, in which 12cm 脳 12cm inner hole and 4cm thick wall effectively control the downward spiral flow and prevent the infinite expansion of soil scour. Vegetative soil can increase the vegetation survival rate and increase the vegetation density, and the vegetation cover formed by the grass can help to reduce the direct erosion of the soil caused by the water flow.
【作者单位】： 广东省水利水电科学研究院广东省水动力学应用研究重点实验室;广东省水利水电科学研究院河口水利技术国家地方联合工程实验室;深圳市水务工程建设管理中心;
【基金】：广东省水利科技创新项目(2016-12,2015-11)
【分类号】：TV861
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