Geological Safety Risk Evaluation Based on Multi-Classification Support Vector Machine Model-Taking Nedang Township of Qushui County, Lhasa City as an Example

The engineering geological conditions in Tibet are complex, in geological disasters occur frequently, causing damage to people's lives and properties in the area and hindering regional economic development. To reduce the degree of losses caused by geological disasters to people's lives and properties in the area and to improve the level of reasonable engineering construction in the development zone, effective geological safety risk evaluation is an important part of urban development and construction. However, the common evaluation model of the hierarchical analysis method has problems such as high subjectivity, large classification error, and single sample type. In this paper, we use the support vector mechanism evaluation model based on the geological safety risk level to evaluate the study area, avoiding the limitations of the traditional evaluation method by subjective weighting evaluation results, the evaluation results coincide with the actual situation, verifying the effectiveness of the model, which better protects the development of the urban engineering and provides an important decision-making basis for the planning and development of engineering and construction.