市域铁路工作井工程造价分析研究

Analysis and Research on the Engineering Cost of Working Shaft in Suburban Railway

目前国内对于市域铁路工作井造价方面的研究文献较为匮乏。为研究市域铁路工作井造价投资组成及造价影响因素,基于上海轨道交通市域铁路机场联络线项目工程实践,对工作井工程造价影响因素开展分析研究。结果表明:工作井类别对其工程造价影响较大,始发工作井工程投资大于接收工作井;工作井设计参数中基坑深度、特殊外部条件、环境保护等级、工程水文地质条件对工作井工程造价影响较大,设计过程应重点关注;围护体系、主体结构在工作井投资占比高,分别约占50%、30%,地下连续墙、墙板结构为对应分项工程投资占比最高的分部工程;综合分析上海市采用地下连续墙作为围护体系的市域铁路工作井,其体积指标在3 000元/m^(3)左右。

Currently,there is a relative lack of domestic research literature on the cost of suburban railway working shaft.In order to investigate the investment composition and factors influencing the cost of these working shafts,an analysis and research study was conducted based on the engineering practice of Shanghai Suburban Railway Airport Link Line.The study focused on identifying the influencing factors affecting the engineering cost of working shaft construction.The findings indicate that:the type of working shaft has a significant impact on engineering costs,with starting working shaft requiring greater investment compared to receiving ones.Factors such as foundation pit depth,special external conditions,environmental protection grade,and engineering hydrological conditions have a substantial influence on working shaft construction costs and should be given more attention during the design process.The envelope system and main structure account for a high proportion(approximately 50%and 30%,respectively)of total investment in working shaft construction.Among them,underground diaphragm walls and wall structures are sub-projects with the highest investment proportion.In Shanghai′s suburban railway projects utilizing underground diaphragm walls as envelope systems,the volume index for working shafts is approximately 3000 yuan/m^(3).