论文部分内容阅读
蒲虹公路是地震灾区的一条灾后新建公路。公路外边坡堆放有大量的弃土,在强降雨的作用下易转化为泥石流。此类现象受到研究者的关注。本文通过对弃土场的分布、组成及成灾特征的研究,提出了科学合理的处理方法。弃土泥石流形成模式包括:(1)沟道内弃土场在沟道洪水侵蚀作用下产生泥石流或土体溜滑形成泥石流;(2)坡面上弃土场滑动,表面液化形成局部坡面泥石流;(3)沟道两侧弃土场的基脚被侵蚀,形成滑坡堵河后溃决形成泥石流。弃土泥石流的成灾特征主要为弃土泥石流翻越挡墙或摧毁挡墙,堵塞涵洞或排水口,淤埋公路,威胁居民点等,它的处置需要特别注意排水,并平整压实,恢复生态。
Pu Hong Highway is a post-disaster new road in the earthquake stricken area. A large amount of spoil is piled on the slope outside the highway and is easily converted to debris flow under the action of heavy rainfall. This phenomenon has attracted the attention of researchers. Through the research on the distribution, composition and disaster characteristics of the spoil ground, this paper puts forward a scientific and reasonable approach. Debris flow debris flow patterns include: (1) The spoil ground in the channel produces debris flow or soil slippery slide to form debris flow under the channel flood erosion; (2) The spoil field on the slope slides and the surface liquefies to form a local slope debris flow ; (3) The footing of the spoil ground on both sides of the channel is eroded to form a debris flow after the landslide has been closed up. Disaster debris debris flow characteristics of the main debris spoil earth debris flow over the retaining wall or destroy the retaining wall, block culverts or drains, buried roads, threatening settlements, its disposal requires special attention to drainage, and compaction and restoration of ecology .