一种新的盾构隧道双层衬砌解析分析方法

doi:10.13722/j.cnki.jrme.2019.0723

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Abstract Based on the curved Euler beam theory，this paper presents an analytical solution for the double lining structure of shield tunnels. Partial-interaction composite curved beam theory is employed to simulate the double lining，and mechanical springs are used to reflect the radial joints effect. The solutions for the internal forces and deformations can be derived by the state space method for arbitrary loadings and variable joint distributions. The solutions revalidated by a comparison with the results of the existing analytical method and numerical model. Using the present solutions，the influence of different joint distributions on internal forces and deformations of the lining are discussed，and the variation trends of internal forces and deformations varying with interlayer shear stiffness between inner and outer linings are also examined under different joint stiffness conditions. The results show that：(1) Increasing the interlaminar shear stiffness can enhance the overall stiffness of the double lining，while the axial force increases，and the bending moment decreases. (2) The bending stiffness of the joint has a significant influence on the bending moment and deformation，but has less influence on the axial force；(3) When the tension and compression stiffness of the joint is too small，the double lining with larger interlayer shear stiffness will be more likely to exhibit a deformation mode different from the‘elliptical’mode because of the greater tendency of the inward contraction. The results obtained from this study may provide useful guidance for design of the double lining structure of shield tunnels.

Key words： tunnelling engineering shield tunnel double lining composite beam；state space method joint of lining segment

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	Articles by authors
	CHEN Qiujie
	YANG Zhongxuan
	XU Rongqiao
	HUANG Weiming
	WANG Jinchang

Cite this article:

CHEN Qiujie,YANG Zhongxuan,XU Rongqiao, et al. A new analytical solution for shield tunnel with double lining[J]. , 2020, 39(S1): 2713-2724.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0723 OR http://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS1/2713

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