Risk Assessment Of Slope Geological Hazards In Shanyang County

Slope disasters have always been a major problem in the field of engineering research.After slopes are deformed and destroyed,they are prone to geological disasters such as landslides and collapses,causing unpredictable life and property safety losses and adverse social impacts.It is not clear that slope disasters.Under the premise of when it happens,it is very important to study the risk assessment of slope geological hazards.This paper takes the urban slope of Shanyang County,Shangluo City as the research object.Based on the comprehensive collection and analysis of the research results of relevant scholars at home and abroad,the idea of individual geological hazard risk assessment is used to evaluate the geological hazard risk of the urban slope of Shanyang County.On the basis of field investigation and indoor experiment,first calculate the stability coefficient and instability probability of the slope in the county and urban area under natural,continuous rainfall of 15mm/hr for 48 hours and saturated conditions,and then use the method of probability statistics to calculate the slope The threatened hazard-bearing body is subjected to vulnerability assessment,and finally the risk value is calculated by formula.Risk assessment is carried out on the slopes of the county and urban areas,and risk management and control measures suitable for slope disasters in the urban area of Shanyang County are proposed.The research content is as follows:(1)Based on actual field surveys,the basic characteristics of the slopes in the county and urban areas were basically clarified,the slope stability was qualitatively analyzed,and the Geo-Studio software was used to perform stability analysis under three working conditions;(2)Using the Bishop method as the stability state function equation,the Monte Carlo method is used to calculate the probability of slope instability under natural,15mm/hr rainfall for 48 hours and saturated conditions,and the empirical method is used to predict the movement of the slope after instability.Distance and range of influence;(3)Carry out classification statistics on the disaster-bearing body within the influence range,and determine the vulnerability of the disaster-bearing body;on the basis of obtaining the instability probability,time probability,and space probability,etc.,according to the risk calculation formula,the Shanyang is calculated The magnitude of the population casualty risk and the economic loss risk of the slope in the county and urban area under the three working conditions;(4)Research on the acceptable risk levels of slopes in Shanyang County.Under natural conditions,the risk levels of population casualties on all slopes are acceptable risk levels;there are 4 slopes under the condition of continuous rainfall of 15mm/hr for 48 hours It is a tolerable risk level,and the rest are acceptable risk levels;under saturated conditions,9 slopes are unacceptable risk levels,4 slopes are tolerable risk levels,and the rest are acceptable risk levels;(5)The economic loss risk level of slopes in the urban area of Shanyang County is studied.The economic loss risk level of all slopes in the natural state is level one;the economic loss of two slopes under the condition of 15mm/hr continuous rainfall for 48 hours The risk level of loss is level two,and the rest are level one;in the saturated state,the economic loss risk level of one slope is level five,one is level four,one is level three,three are level two,and the rest are all One level.