【摘要】 地面沉降灾害对基础设施的安全运营造成了很大的威胁.轨道交通作为一种线状结构穿越于上海软土地层中,地面沉降灾害不可避免地会对轨道交通的安全运营产生影响,轨道交通自建成以来长期遭受地面沉降灾害带来的风险.基于梯形模糊AHP(Analytical Hierarchical Process)和集对分析法,通过主客观相结合的方式,以GIS(Geographic Information System)平台为分析工具,对上海地面沉降造成轨道交通沉降风险进行全面综合的评估,从而得出以考虑基础设施安全为侧重点的地面沉降防治区划以及轨道交通沿线的沉降风险等级.分析表明,采用梯形模糊AHP与集对分析相结合的方法可以对区域地面沉降综合风险进行合理有效的评估,并对重要基础设施所在区域的风险等级进行合理的识别.轨道交通沿线沉降风险等级表明中心城区以北和靠近黄浦江地区的轨道交通相比于其他区域具有较高的沉降风险,建议对该部位的轨道交通线路采取必要的沉降监测及防治措施.更多还原

【Abstract】 Land subsidence disasters pose a great threat to the safe operation of infrastructure. As linear structures,metro systems cross the soft soil layer in Shanghai. Land subsidence disasters inevitably affect the safe operation of metro system. Metro system has long suffered from the risks of land subsidence since its completion. Based on trapezoidal fuzzy Analytical Hierarchical Process(AHP)and Set Pair Analysis(SPA),using the combination of subjective and objective analyses,this paper attempts to assess the risk of metro system settlement caused by land subsidence in Shanghai. Moreover,the land subsidence prevention zoning with the emphasis on infrastructure safety and the settlement risk level along the rail transit are obtained. The results show that the combination of trapezoidal fuzzy AHP and SPA can reasonably and effectively assess the risk of regional land subsidence,and reasonably identify the risk level of the important infrastructure. The settlement risk level within 500 m along the metro system indicates that the metro system in the north of the central city and close to the Huangpu River areas have higher settlement risk than other areas. It is recommended to take monitoring and prevention measures for the metro system in this area.更多还原