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隧道建设（中英文） ›› 2018, Vol. 38 ›› Issue (6): 1052-1059.DOI: 10.3973/j.issn.2096-4498.2018.06.023
WANG Dujuan, NING Xiangke
王杜娟, 宁向可
摘要：
With reference to the construction conditions and features of metro tunnels, the design features of doubleshield TBMs are analyzed and key issues to be considered and settled when a doubleshield TBMs is used for metro tunnel construction are proposed. The issues include cutterhead′s rockbreaking capacity, small curve excavation, selection of backfill grouting technology and jamming prevention and release function in fault and fracture zone, etc., which all have a direct effect on the geological adaptability, tunnel lining quality and tunneling performance of doubleshield TBMs. Subsequently, the specific design and optimization scheme, which includes the design of cutterhead thick steel plates, tapered shield, monorail hoist and pea gravel backfill and cement slurry grouting, etc., are studied. The success of doubleshield TBMs in Shenzhen Metro project well proved its remarkable geological adaptability and advantages in efficient mechanized construction.
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