Risk Assessment And Prevention Research Of The Loess Landslide At Songpan Mounigou

With the ongoing construction of foundation engineering, the analysis and prevention for landslide is has increasingly becoming a hot research topic in academia and engineering circle both at home and abroad. In this paper, we learn from the risk assessment method, and based on Songpan Mounigou loess landslides actual engineering, carried out a research on the application of risk assessment on the application of loess landslide prevention. This paper carried out mainly cover the following work:1. Considering the researches on risk assessment at home and abroad and the characteristics of loess landslide, we determine setting Analysis Hierarchy Process, the expert investigation and the fuzzy comprehensive evaluation as the main line of the risk assessment and risk management process, and combined quantitative and qualitative assessment methods for Songpan Mounigou loess landslides risk assessment.2. From the natural and geological risk, the survey risk, the design risk, the construction risk and the material risk in five areas in Songpan Mounigou loess landslide points of the work to identify the risk factors and take full account of Songpan Mounigou loess itself middle collapsibility, low shear risk and road excavation formed free face risks.3. According to the characteristics of landslide control, we proposed the concept of risk reassessment. First, through the preliminary risk assessment of the loess landslide worksites, it belongs to high risk, and according to the risk acceptance criteria, we must propose appropriate engineering countermeasures for risk weights greater risk factor; secondly, we make risk assessment of the work site after the landslide control once again, the risk is reduced to low risk.4. On the basis of a risk assessment, combined the ABAQUS finite element analysis software, we study a comparative study of the stress, displacement, the plastic zone development and the stability situation of Songpan Mounigou loess landslides before and after reinforcement,for loess landslides around Songpan Mounigou and verify that the reinforce measures for Songpan Mounigou loess landslides is reasonable.