地下水对人工堆积碎石土滑坡的影响机制分析

Analysis on the Influence Mechanism of Groundwater to the Landslide of Artificial Accumulation Gravel Soil

摘要: 边坡的稳定性与地下水的关系极为密切，而人工堆积碎石土固结性差，地下水作为重要营力之一，在其变形过程中发挥重要的作用。本文以安徽省南部黟县林川滑坡为例，结合地层岩性、地形地貌、人类工程等方面分析了地下水对人工堆积碎石土滑坡的影响，阐述其触发机制。结果表明：地下水对人工堆积碎石起到软化、冲蚀、掏蚀的作用，使其重力、抗剪强度增加，与滑面的摩擦力减少，碎石土中土体减少，粘度降低，致使滑坡下滑力增加。

Abstract: The stability of landslide is very sensitive to groundwater. The consolidation of artificial accumu-lation gravel soil is very poor. Groundwater plays an important role in the deformation process as one of the important force. This paper, taking Lin Chuan landslide in Yixian County of southern Anhui Province as an example, analyzes the impact of groundwater on the artificial pile of debris landslide, combining with the formation lithology, topography and geomorphology human engi-neering activity. The results show that: groundwater increase the sliding force of the landslide by softening, erosion and undercutting the artificial accumulation gravel soil.