Comprehensive Evaluation Of Underground Space Suitability In Longyang District Of Baoshan City Based On GIS

At present,the social value,economic value,ecological value and other aspects of urban underground space resources have not received full attention.The acceleration of global urbanization has brought huge challenges to the sustainable development of urban society,economy and environment.Urban planning puts forward higher requirements,and underground space is a new direction for urban development.Based on the "Research on the Construction Methods of Yunnan Urban Geological Information Platform" project,this subject research uses the theory of grey analytic hierarchy process to construct an evaluation index system for the suitability of urban underground space construction.The urban planning area of Longyang District,Baoshan City is selected as the research area,the geological environment characteristics of this area are studied,and the basic geological environment conditions and main geological problems of the research area are analyzed.Finally,a three-dimensional numerical model of the suitability of urban underground space construction in the study area was established,and scientific and reasonable geological suggestions were put forward for the reasonable planning and sustainable development of the urban underground space in the study area.The main research results are as follows:1.Establish a suitability system for urban underground space construction.Divided into three evaluation levels of comprehensive pipe gallery engineering,foundation pit engineering,and underground traffic tunnel engineering,a set of standardized,standardized and unified urban underground space construction suitability evaluation system has been constructed.2.The urban planning area of Longyang District,Baoshan City is selected as the research area,and the basic geological environmental conditions of the research area are collected.Analyzed the basic geological environmental conditions of the study area,studied various geological environmental factors in the study area,discussed the degree of influence of these factors on the construction of urban underground space engineering in the study area,and analyzed the main geological problems affecting the construction of underground space.Provide data and results support for the suitability evaluation of the later study area.3.Based on the actual geological environment of the study area and its main geological problems,the analytic hierarchy process combined with the expert scoring method was used to calculate the weight values of the various factors in the suitability evaluation index system of comprehensive pipe gallery engineering,foundation pit engineering,and underground traffic tunnel engineering.Provide a basic basis for the factor overlay analysis of suitability evaluation.4.Use the gray correlation theory and natural break point theory to classify and process the suitability zoning results of each factor in the study area,and at the same time superimpose the unsuitable areas in the sensitive factors to construct the comprehensive pipe gallery project,foundation pit project,and underground traffic tunnel in the study area The project suitability evaluation partition numerical model analyzes the regional characteristics of each evaluation level,and puts forward scientific and reasonable geological suggestions for the reasonable planning and sustainable development of the urban underground space in the study area.