Research On Safety Evaluation Method And The Application Of Existing Building Slopes

A large number of engineering construction activities not only creat many new slopes,but also cause damage to the inherent stability of the original slope,on the other hand,a large number of existing building slopes have been built for a long time.Many problems that the decline or failure in durability of it's reinforcement and accessory structure have become more and more serious,extreme climate and human factors further increase the possibility of geological disasters,every year,landslide and other geological disasters can cause a lot of economic loss and casualties.In this paper,the slope stability assessment method is studied by site survey?numerical analysis and mathematical calculations methods based on a hillside slope behind a stamping plant,the main research contents and research results include:(1)The fuzzy Petri net not only has a strict mathematical derivation,but also its model can be visually represented,can clearly express the dynamic behavior of the system.In this paper,the fuzzy Petri net is used to replace the traditional safety and stability assessment method,which not only considers the probability of the occurrence or occurrence of each influencing factor in the slope engineering,but also the contribution value of each influencing factor to the safety of the slope.(2)Most of the slope assessment methods use AHP or entropy weight method to determine the weight of the influencing factors.However,these methods have the problem of strong subjectivity or difficulty in data acquisition.This paper establishes a connection between sensitivity of factors and weight,uses Geostuio to calculate the sensitivity of each factor,and then uses the correlation formula to obtain the weight value.(3)There is a ambiguity in the understanding of the relationship between the degree of sensitivity to weight,cohesion,and internal friction angle,the paper study the relationship using numerical simulation,at the same time the effects of internal friction angle,slope height and slope angle as a single variable on the safety and stability of the slope are studied.(4)Regarding the credibility of the proposition is calculated by using the expert scoring method ? the calculation of the rule transition confidence ? i has noexplanation and the initial state matrix M(0)adopts an value of author-made in the relevant fuzzy Petri net literature,combining with the actual slope engineering,this paper attempts to innovate the calculation methods of these three parameters and compares the final evaluation result with the numerical simulation results and the results of field survey and evaluation,and verifies the rationality of the method and the correctness of the parameter innovation calculation.(5)The slope deformation monitoring data is used as an intuitive manifestation of the slope deformation.In this paper,the GM(1,1)model is used to fit and predict the horizontal displacement of the slope,and uses the GM(1,2)model that the vertical displacement is used as the input variable to predict horizontal displacements,The result shows that the GM(1,1)model can only make rough predictions or even invalid,but the GM(1,2)model with input variables has a very high fitting accuracy and prediction accuracy for other historical data,in addition to the first few datas.