Research on Geological Environment Evaluation of Jinan Based on 3D Model

Jinan is a famous spring city, and the springs have carried the long history and civilization of Jinan. 3D geological environment evaluation of Jinan can better coordinate the harmonious coexistence between urban underground space development and spring protection. In this study, 742 borehole data are used as the main modeling data to construct a three-dimensional stratigraphic structure model by Geomodeller, and on this basis, 14 kinds of geological environment quality evaluation indexes in four aspects, such as geological environment stability, geological resources, geological environment quality, and human activity impact, are selected to construct the Jinan geological environment evaluation index system, and the collected multi-source index data are processed and unified as Drill hole point data. The evaluation index weights are determined by using hierarchical analysis method, and the geological environment of Jinan is evaluated by fuzzy comprehensive evaluation method, and finally a three-dimensional geological environment evaluation model is formed. By analyzing the three-dimensional evaluation results, it was found that the percentage of areas with poor, poor, good and good geological environment quality in the region were 5%, 22%, 35% and 38%, respectively. The three-dimensional geological environment evaluation model formed in this study has important significance for Jinan spring protection and underground space development.