堆积体滑坡典型特征分析及工程防治对策——以贵州习水县某堆积体滑坡为例

Analysis on the Typical Characteristics of Accumulation Landslide and Engineering Prevention and Control Measures—A Case Study of an Accumulation Landslide in Xishui of Guizhou Province

为研究堆积体滑坡的典型特征、滑动机理,提出更为合理的防治对策,以贵州某堆积体滑坡为研究对象,并通过分析已有类似滑坡案例,得出如下结论:堆积体滑坡的地形具有明显的汇水特征,单面斜坡地形是常见的堆积体滑坡地形;坡体粗颗粒含量较高,碎块石土为常见的滑体岩土类型;滑面上下岩土体的渗透性具有明显差异,土石界面是该类滑坡常见的滑面类型;滑床为砂泥岩等软质易风化岩的堆积体滑坡较硬质岩滑床的滑坡更易发生滑动破坏;降水是该类滑坡的主要诱发因素,累计降雨量是影响该类滑坡整体稳定性的重要指标。防治措施应重视排水,并注重治理措施实施的时效性,及时采取措施进行治理,避免发生大规模滑动。

A accumulation landslide in Guizhou Province,combined with similar landslide cases published in literatures,was analyzed to study the typical characteristics and sliding mechanism of this kind of landslide,and to draw a more reasonable prevention and control measures.It is concludeed that the terrain of accumulation landslide has obvious catchment characteristics,one-sided slope is a common landslide terrain;The content of coarse particles in slope body is high,and the gravel-soil is a common geotechnical type of sliding body;the permeability of layers above and below the sliding surface is obviously different,and the soil-rock interface is a common sliding surface of this kind of landslide;the landslide with the sliding bed of soft and easily weathered rock such as sandstone and mudstone is more prone to sliding damage than the landslide with hard rock sliding bed;rainfall is the main inducing factor of this kind of landslide,and the accumulated rainfall is a main factor affecting the stability of landslide.The prevention and control measures should pay attention to drainage and the timeliness of the implementation of treatment measures,and take timely measures to avoid large-scale sliding.