贵州省印江县罗场中学滑坡的影响因素及稳定性分析

Influence factors and stability analysis of Luochang Middle School Landslide in Yinjiang,Guizhou

分析了贵州省印江县罗场中学滑坡的影响因素,主要是有利的地形地貌及地质环境条件,大气降雨以及人类工程活动。该滑坡分为已滑动和潜在滑动两部分,采用极限平衡法分析了潜在滑坡体的稳定状态及剩余下滑推力。分析表明,滑坡在自然条件下处于基本稳定或暂时稳定状态,在暴雨情况下处于欠稳定或基本稳定状态,在地震作用下处于不稳定或局部稳定状态。根据保护对象和滑坡的特点,建议采取分区分段治理,治理方案包含截流排水、抗滑支挡、削坡锚固及爆破卸荷等工程。

In this paper,we analyzed the influence factors of Luochang Middle School Landslide in Yinjiang,Guizhou. The landslide was mainly affected by the topography,the geological environment,atmospheric rainfalls and human engineering activities. The landslide included two parts： already-slid part and potentially-sliding part. By using limit equilibrium analysis method,we evaluated the stability and the residual sliding forces of the potential landslide mass. Analytical results indicated that the landslide mass was in basically stable or temporarily stable states under natural conditions,that it was in understable or basically stable states under rainstorm conditions,and that it was in unstable or partially stable states under earthquake conditions. Considering the protection objects and the characteristics of the landslide,we suggest that zoning management measures should be taken,and the measures include interception and drainage,anti-slide support,slope cutting and anchorage,and unloading by blasting,etc.