城市地下空间开发利用地质适宜性三维评价指标体系研究——以杭州市为例

地下空间开发地质适宜性三维评价是合理进行地下空间立体化开发、降低开发地质风险的重要手段，也是当前研究热点。作为地质适宜性三维评价全过程的重要一环，科学合理地建立三维评价指标体系是其能否正确开展的前提基础。通过结合杭州城市地下空间开发面临的地质问题，在系统分析各评价指标对地下空间开发建设影响的特征基础上，以三维视角从地层三维结构等多个方面构建完成了一套具有多层次结构的三维评价指标体系，并采用层次分析方法对评价指标进行了目标权重的计算、一致性检验、排序和分析。该指标体系可划分为5个准则层21个指标层，相较于二维评价指标体系，通过融合三维地质模型和三维空间分析方法，使评价过程中能够考虑更多的评价因子，更好地描绘地下复杂的三维地质环境，丰富了三维评价结果的内涵。基于模糊综合评价方法的杭州钱江新城二期的三维评价应用成果表明，该指标体系为三维地质模型和三维空间分析方法之间的整合提供了有力的指导，为提升三维尺度下的地下空间开发地质适宜性评价精度和准确性提供了有力的支持。

The research on 3D evaluation index system of geological suitability for urban underground space development and utilization

3D geological suitability evaluation for urban underground space (UUS) is an important method for the rational development of UUS and reducing the geological risk of development,and it is also a current research hotspot.As an important part of the whole process of 3D geological suitability evaluation,scientific and reasonable establishment of 3D evaluation index system is the premise basis for this. Methods: By combining with the geological problems faced by the development of UUS in Hangzhou,based on the systematic analysis for the characteristics of the impact of each evaluation index on the development and construction of UUS,a 3D evaluation index system with multi-level structure is constructed in three dimension from the 3D structure of the stratum and other aspects.The analytic hierarchy process (AHP) is used to calculate the object weight,consistency test,sort and analysis of the evaluation index.Results:The 3D evaluation index system can be divided into 5 criterion layers and 21 index layers.Compared with the 2D evaluation index system,more evaluation factors can be considered in the evaluation process by integrating 3D geological model and 3D spatial analysis method.The complex 3D geological environment can be better described,which enriches the connotation of 3D evaluation results.Conclusions: The application results of 3D geological evaluation for Qianjiang New Town in Hangzhou based on fuzzy comprehensive evaluation method show that the 3D evaluation index system provides strong guidance for the integration of 3D geological model and 3D spatial analysis method.It also provides strong support for improving the precision and accuracy of UUS geological suitability evaluation in three dimension.