为了客观评价地下空间开发地质适宜性并为评价工作提供一种新思路和参考，提出了一种基于三角模糊数的模糊层次分析法（fuzzy analytic hierarchy process based on triangular fuzzy numbers, FAHP）和优劣解距离法（technique for order preference by similarity to ideal solution, TOPSIS）相结合的评价方法。通过地质调查研究构建基于土体工程地质性质、水文地质条件、不良地质作用、地形地貌等影响因素为主的层次分析关系模型。基于专家判别利用FAHP计算各评价因素的权重，以各评价指标层的分级临界值作为典型评价样本，利用TOPSIS法对适宜性等级进行非等分划分，基于区间值优化的TOPSIS法建立最终评价模型，通过ArcGIS的空间分析功能等确定每个评价单元适宜性等级。该方法与传统方法相比一定程度上减少了评价过程中专家评判的过多主观影响，评价过程更倾向于定量化，结果更为客观。利用该方法对无锡市区浅层地下空间开发地质适宜性进行评价，评价结果与实际工程经验相符，证明了该方法的有效性，因此该方法对地下空间开发适宜性评价工作具有一定借鉴意义。

To objectively evaluate the geological suitability of underground space development and provide a new approach and reference for evaluation work, an evaluation method combining FAHP (fuzzy analytic hierarchy process) and TOPSIS (technique for order preference by similarity to ideal solution) was proposed. Based on geological survey research results, an evaluation factor set was established, primarily encompassing rock and soil engineering geological conditions, hydrogeological conditions, adverse geological processes, and terrain and landforms. FAHP was employed to determine factor weights, and TOPSIS was innovatively applied to determine non-uniform suitability classification. Given that interval numbers were primarily used to express evaluation factors, a new TOPSIS method based on an improved interval number approach was developed, and an evaluation model was constructed using this new method. Then, the evaluation area was divided into multiple evaluation unit grids using ArcGIS, the suitability rating of each unit grid was calculated through evaluation model at the same time. Compared with traditional methods, this method reduces the subjective influence of expert to some extent. The evaluation process are more quantitative, and the evaluation results are more objective. The geological suitability of shallow underground space development in Wuxi City was evaluated using this method, and the evaluation results were consistent with actual engineering experience, proving the effectiveness of this method. Therefore, this method has certain reference significance for the suitability evaluation of underground space development.