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在人工阶梯深潭泥石流治理技术的基础上提出适宜于小流域或支、毛沟防护的拱式生态护岸技术。拱式生态护岸是指在岸坡坡脚修筑L型石笼挡墙,在沟谷中间隔一定距离顺应地势抛填块石形成倒拱,有效地将岸坡土体下滑推力传递到沟谷底部并互相支撑。该技术结合生态护坡理念,在河谷两岸种植根系发达的乔、灌、草组合的多样植被,提高坡积体强度,改善流域的水文特性,抑制浅层滑坡和崩岸的发生。数值模拟表明:植被固土可约束边坡的变形,减小滑坡推力,护脚处柔性石笼可变形自适应,释放滑坡推力,抛石倒拱形基础可有效抑制坡面泥石流。
On the basis of artificial turbulent debris flow control technology, arched ecological revetment technology suitable for small watershed or branch and furrow protection is put forward. Arch ecological revetment refers to the construction of L-shaped gabion wall at the foot of the slope, and at a certain distance in the valleys, the inverted arch is thrown to fill the rock mass, effectively transferring the thrust force of the slope soil to the bottom of the valley and interacting with each other support. Based on the idea of ecological slope protection, this technology integrates diversified vegetation of well-developed root, shrub and grass assemblages on both banks of the river valley to improve the slope strength, improve the hydrological characteristics of the watershed, and suppress the occurrence of shallow landslides and bank collapse. The numerical simulation shows that vegetation can restrain the deformation of the slope and reduce the thrust of the landslide. The flexible gabion at the foot can be adaptively deformed and the thrust of the landslide can be released. The dumped arching foundation can effectively restrain the debris flow on the slope.