【摘要】：針對(duì)護(hù)坡工程及中小河流護(hù)岸建設(shè)中植被護(hù)坡抗沖性能問題,建立了深圳市葵涌河生物磚護(hù)岸結(jié)構(gòu)的抗沖性能物理模型,基于有壓管流最大可產(chǎn)生流速達(dá)6m/s,對(duì)生物磚結(jié)構(gòu)進(jìn)行沖刷試驗(yàn)。結(jié)果表明,對(duì)浸泡12h的生物磚,經(jīng)3.2~5.8m/s流速?zèng)_刷12h后其抗沖性能表現(xiàn)良好,最大沖深為2~6cm;抗沖性能取決于水泥磚、營(yíng)養(yǎng)土、植被之間的復(fù)合結(jié)構(gòu),其中水泥磚12cm×12cm內(nèi)孔及4cm厚壁有效控制了向下螺旋流的發(fā)展,阻止了土壤沖坑的無(wú)限擴(kuò)大;營(yíng)養(yǎng)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蓋層有助于減小水流對(duì)土壤的直接侵蝕。
[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.
【作者單位】： 廣東省水利水電科學(xué)研究院廣東省水動(dòng)力學(xué)應(yīng)用研究重點(diǎn)實(shí)驗(yàn)室;廣東省水利水電科學(xué)研究院河口水利技術(shù)國(guó)家地方聯(lián)合工程實(shí)驗(yàn)室;深圳市水務(wù)工程建設(shè)管理中心;
【基金】：廣東省水利科技創(chuàng)新項(xiàng)目(2016-12,2015-11)
【分類號(hào)】：TV861

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