滑坡堆积体前缘层状岩体工程特性分析

Engineering Characteristics Analysis of the Layered Rock Masses at the Leading Edge of the Talus Landslides

西部水电工程存在大量滑坡堆积体,部分滑坡堆积体前缘堆积物未分解,结构完整,形成坡体前缘的层状岩体。由于这些层状岩体处于滑坡堆积体底部前缘,分析其对上部堆积体,以及整个坡体的稳定性影响有着重要意义。利用某水电工程的滑坡堆积体实例,计算其在水位下降工况下前缘块状岩体稳定性;同时分析其对上部堆积体的稳定性影响。通过分析计算,该滑坡堆积体前缘层状岩体对滑坡堆积体有阻滑作用,可以当作天然挡土墙处理,不需要稳定加固处理。论证了将这些滑坡体前缘层状岩体当作挡土墙处理的可行性。

A large number of talus landslides have been existed in the western hydropower projects. Some deposits, leading edge of the landslides, have not been decomposed, and have complete structures. Therefore, they have formed the layered rock masses at the leading edge of the slopes. These layered rock masses are in the bottom of the leading edge of the talus landslides, so it has important significance to analyze the effect of the upper accumulation of body as well as the entire slopes stability. Used a talus landslide of western hydropower projects as engineering example, to calculate the stability coefficient of the mass at the condition of the reservoir water levels drawdown, And to analyze effect of the whole slope. Through analysis and calculation, this layered rock masses at the leading edge of the slopes has the role of sliding resistance to the talus landslides. It can be used as retaining wall, and not be strengthened. So the layered rock masses at the leading edge of the talus landslides being treated as a retaining wall is viable.