岩土工程学报2024，Vol.46Issue(7)：1556-1562,7.DOI:10.11779/CJGE20230324
考虑刀盘推力的泥水盾构隧道开挖面平衡机理研究及应用
Research and application of balance mechanism of excavation surface of slurry shield tunnels considering cutterhead thrust
摘要
Abstract
In the existing balance mechanism of the excavation surface of slurry shield tunnels,the support of the excavation surface is mostly considered to be provided by mud pressure,and the role of cutterhead thrust in the support is rarely mentioned.In response to the specific problem of excavation surface support in the Chuanqin slurry shield tunnel project,based on the analysis of the main control parameters of excavation surface support,the balance mechanism of the excavation surface of the slurry shield tunnel considering the cutterhead thrust is revealed,and a specific expression for the cutterhead thrust is proposed.Using the revealed equilibrium mechanism and the proposed method for estimating the external frictional resistance of the shield shell,the calculation of excavation support force and the stability analysis are conducted for the three key crossing sections of the project.The research shows that in the excavation of the three key crossing sections,the cutterhead thrust accounts for 21%,24%and 11%of the excavation face support force,respectively.Considering both the mud pressure and the cutterhead thrust,the proportion of the combined axial water and soil forces in the presence range in front of the excavation face increases from 0,0 and 78%to 78%,32%and 88%,respectively,compared to only considering the mud pressure.It is indicated that the cutterhead thrust plays an important role in the excavation face support.关键词
泥水盾构/开挖面/支护/稳定/刀盘推力/总推力/泥浆压力Key words
slurry shield/excavation surface/support/stability/cutterhead thrust/total thrust/mud pressure分类
建筑与水利引用本文复制引用
段丽敏,王建,侯丽平,鲁洋,闵凡路,毛子铭..考虑刀盘推力的泥水盾构隧道开挖面平衡机理研究及应用[J].岩土工程学报,2024,46(7):1556-1562,7.基金项目
国家自然科学基金项目(52279099,52078189) （52279099,52078189）
