深埋隧道复合式衬砌内力和位移的荷载结构法

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Abstract Research purposes: It has important theoretical significance and engineering value to study the internal force and displacement of composite lining of deep buried tunnels with arbitrary shape. In this paper, the analytical solutions of axial force and displacement of composite lining of circular tunnel under axisymmetric load are derived based on the theory of elastic mechanics, and are compared with the numerical solutions to determine the reasonable value of elasticmodulus of the link element between primary support and secondary lining.The axial force,bending moment anddisplacement of composite lining of non-circular tunnel in grade Ⅳ surrounding rock are analyzed. The constraint effects of surrounding rock on primary support, primary support and secondary lining are simulated by the link element, and the elastic modulus of surrounding rock and primary support are taken respectively. Finally, the influence of lateral pressure coefficient on mechanical properties of non-circular composite lining is discussed.
Research conclusions: (1)Under axisymmetric load, the error between the analytical solution and the numerical solution of axial force and displacement of initial support and secondary lining of circular tunnel is less than 5%.It is determined that when the link element is used to simulate the interaction between initial support and secondary lining of the non-circular tunnel, the elastic modulus of initial support or secondary lining can be used.(2)In the corresponding position of the non-circular tunnel, the axial force and bending moment of secondary lining are greater than those of initial support. For primary support and secondary lining, the maximum axial force occurs at the hance and the bottom, respectively. The maximum bending moment occurs at the arch foot, and the maximum vertical displacement occurs at the bottom.(3)For grade Ⅳ surrounding rock with lateral pressure coefficient in the range of 0.1 to 0.3, the change of lateral pressure coefficient has little effect on the maximum axial force, bending moment and displacement of non-circular tunnel secondary lining.(4)These conclusions can be applied to the engineering structures such as tunnels, shafts, and pipe piles.

Key words： primary support secondary lining axial force bending moment displacement

Received: 06 January 2022

PACS:

TU449

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	Articles by authors
	LIU Shuhong
	WU Chenhao
	CHEN Xuefeng
	ZHU Yongquan

Cite this article:

LIU Shuhong,WU Chenhao,CHEN Xuefeng, et al. Internal Force and Displacement of Composite Lining of Deep Buried Tunnels Based on Load-structure Method[J]. Journal of Railway Engineering Society, 2023, 40(11): 70-74.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2023/V40/I11/70

[1]	Liu S, Duan J, Fan J, etc. Stress and Displacement of Deep-Buried Composite Lining Tunnel under Different Contact Conditions[J].Mathematical Problems in Engineering, 2023, 7467290.
[2]	李德武,杨进京.双层模筑混凝土隧道衬砌受力检算的叠合梁模型及其应用[J]. 现代隧道技术,2016(5):108-113.Li Dewu,Yang Jinjing. Composite Beam Model for the Force Calculation of a Tunnel Lining with Double-layer Molded Concrete [J]. Modern Tunnelling Technology,2016(5):108-113.
[3]	宋玉香,刘勇,齐键旭. 铁路隧道复合衬砌内力计算方法研究[J]. 铁道工程学报,2015(8):73-75.Song Yuxiang,Liu Yong,Qi Jianxu. Research on the Calculation Method of Composite Lining Internal Force for Railway Tunnel [J]. Journal of Railway Engineering Society,2015(8):73-75.
[4]	肖明清. 复合式衬砌隧道的总安全系数设计方法探讨 [J]. 铁道工程学报,2018(1):84-88. Xiao Mingqing. Discussion on Design Method of General Safety Factor of Composite Lining Tunnel [J]. Journal of Railway Engineering Society,2018(1):84-88.
[5]	房倩,张顶立,王毅远,等. 高速铁路隧道初支、二衬间接触压力研究[J]. 岩石力学与工程学报,2011(2):3377-3385.Fang Qian,Zhang Dingli,Wang Yiyuan,etc. Study of Contact Pressure Between Primary Lining and Secondary Lining for Tunnels of Passenger Dedicated Lines [J]. Chinese Journal of Rock Mechanics and Engineering,2011(2):3377-3385.
[6]	李鹏飞,张顶立,赵勇,等. 大断面黄土隧道二次衬砌受力特性研究[J]. 岩石力学与工程学报,2010(8):1690-1696.Li Pengfei,Zhang Dingli,Zhao Yong,etc. Study of Mechanical Characteristics of Secondary Lining of Large-section Loess Tunnel [J]. Chinese Journal of Rock Mechanics and Engineering,2010(8):1690-1696.
[7]	徐芝纶. 弹性力学[M]. 北京:高等教育出版社,2016.Xu Zhilun. Elastic Mechanics[M]. Beijing:Higher Education Press,2016.
[8]	TB 10003—2016,铁路隧道设计规范[S]. TB 10003—2016,Code for Design of Railway Tunnel[S].