土木与环境工程学报（中英文）2024，Vol.46Issue(6)：89-99,11.DOI:10.11835/j.issn.2096-6717.2022.095
基于极限分析理论的复合地层中双模盾构开挖面稳定性研究
Study on the stability of double-mode shield excavation face in composite strata based on limit analysis theorem
摘要
Abstract
To study the stability of the tunnel face for dual-mode shield machine excavated in a composite strata,a two-dimensional failure mechanism of the tunnel face was constructed by using spatial discretization technique.The objective function of the soil chamber pressure in the limit state was derived by using this failure mechanism and the upper limit theorem of limit analysis.The upper bound solution of the soil chamber pressure to maintain the stability of tunnel face during the shield machine pass through the interface of the soil/rock was obtained from optimization.Moreover,the influence of different parameters on the soil chamber pressure and the failure mode of the tunnel face were discussed.On this basis,based on the probabilistic theory,the reliability model of the soil chamber pressure was established,and the minimum soil chamber pressure which was used to maintain the stability of tunnel face in composite stratum with a tolerable reliability was given.Parametric analysis shows that the soil chamber pressure decreases as the distance between the shield machine and interface of the soil/rock shortens,and failure region in front of the tunnel face increases with the increase of the interface inclination angle.关键词
复合地层/双模式盾构/土舱压力/可靠度/极限分析理论/上限定理Key words
composite strata/double-mode shield/soil chamber pressure/reliability/limit analysis theorem/upper bound theorem分类
交通工程引用本文复制引用
黄阜,陈晶晶,王勇涛,杨云强,谭瑞..基于极限分析理论的复合地层中双模盾构开挖面稳定性研究[J].土木与环境工程学报（中英文）,2024,46(6):89-99,11.基金项目
国家自然科学基金(51878074、52278395) （51878074、52278395）
湖南省自然科学基金(2021JJ30714) （2021JJ30714）
长沙理工大学研究生科研创新项目(CX2021SS25)National Natural Science Foundation of China(Nos.51878074,52278395) （CX2021SS25）
Natural Science Foundation of Hunan Province(No.2021JJ30714) （No.2021JJ30714）
Changsha University of Science&Technology Postgraduate Innovation Program(No.CX2021SS25) （No.CX2021SS25）
