地铁渡线段大断面施工方案比较

Heavy Section Construction Schemes Comparison in the Subway Crossing the Line

在地铁工程建设中,可能遇到软土地层,也可能遇到硬土地层。针对遇到的软土地层或硬土地层,是采用明挖法施工还是采用矿山法施工,目前还没看到过相关研究与报道。为此,此文以北京地铁14号线某区间施工为依托,就硬土地层渡线段是采用明挖法施工还是采用矿山法施工,从造价、经济指标、工期、地下车站结构和存在的风险等方面进行比较。结果表明,采用明挖法施工,风险小、可以节省工期,而且每平方米的造价约为矿山法施工的60%。

During the construction of the subway, soft soil layer and hard soil layer both may be encountered. For the soft soil layer or hard soil layer, it is not seen related studies and reports on the construction with open cut method or mining method. To this end, taking the construction in some interval of Beijing metro line 14 as an example, the cost, economic indicators, time limit for a project, the underground station structure and the risk etc. are compared with the two construction method. The results show it has small risk and can save the time limit＇ for a project, , and the cost of every square meter is lower about 60% than that of the mining method, if the open cut method is use.