花岗岩风化层滑坡的成因机制分析

Evaluation of Slide in a Weathered Granite Slope

广东地区花岗岩分布较为广泛,且花岗岩风化后风化土层厚度一般较大,常在20~30m以上。多呈砂质粘性土状,加之广东年降雨量充沛,花岗岩风化土层浸水后软化严重,强度降低,故广东花岗岩地区多为地质灾害的易发、频发区。连山县太保镇位于典型的深厚花岗岩风化层地区,山地灾害频发,茂古村滑坡即是其中规模较大的一处,通过对该滑坡的变形发展史、地质环境条件等的分析,基本得出了滑坡的成因机制,对同类地区的斜坡稳定性判别和滑坡防治具有一定的借鉴意义。

The granite is a common bedrock type that is widely distributed in Guangdong Province which is underneath approximate 40% of the land area.The weathered granite in this region has a thick deposit depth,low shear strength when it soaks in the water and prone to develop landslide.A landslide in Maogu Village,Taibao Township of Lianshan County is a typical landslide in the weathered granite residual soils.This paper presents the landslide evaluation results and factors that cause the slide from the development of the slide and geological conditions.