滨海深厚软弱地层条件下地铁线路设计研究

Research on subway line design under conditions of deep and weak stratum in coastal area

以深圳地铁20号线一期工程两站一区间线路设计为例,通过对地铁线路设计的合理性、结构方案的安全性及工程造价进行对比,论证比选填海区域软弱地层地铁线路方案的合理性。结果显示,采用"V"字坡的线路方案、明挖与盾构组合的结构方案,可以有效地解决地铁结构在软弱地层的安全性,且具有较好的工程经济性。希冀该研究为类似工程采取针对性措施提供参考依据。

Taking the line design of two stations and one section of Phase I project of Shenzhen metro line 20 as examples,through the comparison of rationality of metro line design,safety of structural scheme and engineering cost,this paper demonstrates the comparison and selection of line scheme in soft stratum in reclamation area.The results show that the safety of subway structure in weak stratum is effectively solved by adopting the route scheme of V-shaped slope and the structural scheme of combination of open cut and shield,and has better engineering cost effective solutions.It is expected that the study provides reference for future similar projects to take targeted measures.