云南省漾濞县石钟村滑坡体特征及发展趋势研究

Research on the characteristics and development trend of landslide in Shizhong Village,Yangbi County,Yunnan Province

云南省漾濞县石钟村的滑坡体属土质浅层滑坡,所处地貌类型多为高山、陡坡、深谷等,属地质灾害易发区。H17-1滑坡顺坡纵向斜长78.0 m,后缘宽53.0 m,中部宽76.0 m,前缘宽93.0 m,坡体面积为6008.0 m^(2),滑体土—岩界面深2.9~4.9 m,岩—岩界面深6.0~8.2 m,体积约61882.4 m^(3)。该滑坡受地形、岩土、构造条件影响,在降水、人类工程活动和地震的影响下,易引发滑坡地质灾害。滑坡稳定性评价认为,滑坡处于极限平衡状态蠕滑挤压(变形)阶段,在地震、特大暴雨或持续性强降雨条件下将处于欠稳定—不稳定状态,可能出现陡坡段和滑体后缘较大范围的滑塌,危及后缘不远处的核桃园村,对村民生命财产安全构成较大的威胁。

The landslide in Shizhong Village,Yangbi County,Yunnan Province,is classified as a shallow soil landslide,and the area′s landform consists mostly of high mountains,steep slopes and deep valleys,making it prone to geological disaster.The H 17-1 landslide has a longitudinal slope length of 78.0 m,a trailing edge width of 53.0 m,a middle width of 76.0 m,and a front width of 93.0 m,covering an area of 6008.0 m^(2).The depth of the sliding body(soil-rock)interface ranges from 2.9 m to 4.9 m,while the depth of the sliding body(rock-rock)interface ranges from 6.0 m to 8.2 m.The volume is approximately 61882.4 m^(3).With the terrain,rock and soil,and tectonic conditions,the landslide is susceptible to geological disasters due to rainfall,human engineering activities and earthquake.According to the evaluation of landslide stability,the landslide is in the creep extrusion(deformation)stage in the limit equilibrium state.Under condition of earthquake,heavy rainstorm or continuous heavy rainfall,the landslide may become unstable.This could lead to collapse of the steep slope section and the rear edge of the landslide in a large range,endangering the nearby Hetaoyuan village and posing a significant threat to villagers′live sand property safety.