Risk Assessment Of Fengxi Villa Slope In Feng County

Slope disaster has always been a problem that human is faced with.After the slope deformation and failure,geological hazards such as landslide,collapse,debris flow and so on are formed,resulting in huge casualties and economic losses.Therefore,the study of slope risk assessment is particularly important.This paper has summarized research status of risk assessment of monomer slope at home and abroad,and the theory,method and system of monomer slope risk assessment.Taking Fengxi Villa slope of Feng County as an example,the risk of monomer slope disaster was studied.Based on the field investigation and laboratory experiment,firstly,the stability analysis of Fengxi Villa slope in Feng County was carried out.The numerical simulation of slope instability process was carried out.That was slope hazard assessment.Then,the disaster-bearing probability,loss rate and value of the hazard bearing body which the slope endangered was analyzed and calculated by using the probability statistical method.That was vulnerability assessment of hazard bearing body.Finally,the risk value was obtained through the risk calculation formula,and the slope risk assessment was carried out.The main research results were as follows:1.The slope instability probability was calculated based on the Monte Carlo method.It was concluded that:Under natural conditions,the probability of slope instability was 30.34%,which was a medium-risk slope.Under rainstorm conditions,the probability of slope instability was 52.17%,which was a medium-risk slope.Under earthquake conditions,the probability of slope instability was 61.79%,which was a high-risk slope.2.The movement process of slope instability was simulated by using 2D-Block discrete element software.It was predicted that the slope was destroyed in the form of the landslide.Under natural conditions,rainstorm conditions and earthquake conditions,the maximum horizontal displacement of slope motion was 44.90m,55.07m and 64.36m respectively,and the influence scope was 5625.65m~2,6943.67m~2 and 8161.72m~2 respectively.3.The slope was under three conditions of natural,rainstorm and earthquake.The risk values of the total population was 13 people,50 people and 99 people respectively.And the risk values of the total population were all in an unacceptable area.The risk values of the total economic loss was 1101.83 ten thousand yuan,2207.08 ten thousand yuan,3667.99 ten thousand yuan respectively.And the risk grade of economic loss all belonged to level 5.