武汉市主城区次浅层地下空间利用适宜性评价

Suitability evaluation of sub shallow underground space utilization in main urban areas of Wuhan

随着武汉市主城区地铁以及大型地下综合体的兴建,次浅层(10~30 m)地下空间开发利用成为主城区提高综合承载能力的重点区域。基于武汉市主城区收集的大量钻孔数据,从岩土体条件、水文地质、地质结构与地震效应和不良地质灾害等四方面构建影响武汉市主城区次浅层地下空间开发利用适宜性评价指标体系。采用指数标度法及最优判断矩阵对层次分析法进行改进,确定各评价指标权重值。结合MapGIS平台进行二次开发,运用模糊综合评判法计算武汉市主城区适宜性评价结果值,结果表明:适宜性优、良、中及差区域的面积占比分别为7.14%、55.62%、26.69%及10.55%,该评价结果可为武汉市主城区地下空间开发利用前期规划提供参考。

With the construction of subway and large underground complex in the main urban areas of Wuhan,the development and utilization of sub shallow(10-30 m)underground space has become the focus of improving the comprehensive bearing capacity of the main urban area based on a large number of drilling data.The suitability evaluation index system for the development and utilization of sub shallow underground space in the main urban areas of Wuhan is constructed from four aspects of rock and soil conditions,hydrogeology,geological structure and seismic effects and adverse geological disasters.In order to determine the weight values of each evaluation indicator,AHP is improved by exponential scaling and optimal judgment matrix methods.The suitability evaluation results for the main urban areas of Wuhan is calculated by fuzzy comprehensive evaluation method with the assistance of secondary development on the MapGIS platform.The suitability evaluation results of sub shallow underground space in the main urban areas are obtained by fuzzy comprehensive evaluation method.The results show that the proportion of areas with excellent,good,medium and poor suitability is 7.14%,55.62%,26.69%and 10.55%,respectively.The evaluation results can provide reference for the early planning of underground space development and utilization.