济南市区轨道交通建设适宜性评价

Subway Construction Suitability Evaluation in Ji'nan Urban Area

济南是著名的泉城,轨道交通建设必须避免影响泉水的正常喷涌。在轨道交通建设可能对泉水产生影响的中心城区,采用多种勘查手段,查明主要交通干线沿线埋藏的孔隙水、裂隙水、岩溶水之间的水力联系,结果表明,泉水出露区孔隙水与裂隙水的水力联系较密切,而岩溶水与孔隙水和裂隙水的水力联系不明显。为此,选取有效隔水层厚度、碳酸盐岩顶板埋深、岩溶水的水位埋深三因子构建评价体系,综合分析得出轨道交通建设按影响深度下限12 m,中心城区的泺源大街一线不适宜地下布置修建地铁;文化路一线地铁建设适宜性中等;明湖路及其以北区域,适宜性较好;经十路、泉城路和南北向的历山路,采取适当措施也不会对泉水产生明显影响。适宜性结果对济南中心城区轨道交通线网规划提供了重要水文地质依据。

Ji＇nan is a city famous for springs, and the underground railway transit construction has to avoid affectingsprings. Some geology surveys were carried out in the city center where rail transit construction may affect the springs, andthe results show that pore water has a closer hydraulic contact with fissure water than with karst water. Based on theconclusion, the three factors-thickness of effective confining layer, depth of carbonate rock roof, depth of kacrst water, aretorsion to build evaluation system. Comprehensive analyze showed the lower limit of influence depth 12 meter in railwaytransit construction, Luoyuan road was inappropriate for metro construction, Wenhua road was moderately appropriate for metroconstruction, Minghu road and the northern part was more appropriate, Jingshi Road, Quancheng road and Lishan road willnot appreciable effect springs under taking appropriate measures. And evaluate the suitability of rail transit construction in thecity center. This article provides an important hydrogeologieal basis for rail transit planning in Ji＇nan city.