既有大直径盾构隧道改建为调蓄隧道结构选型研究
Research on Structural Selection of Renovation of Existing Large Diameter Shield Tunnels into Regulating and Storing Tunnels
张晨光 1柳献 2张达石1
作者信息
- 1. 上海市城市建设设计研究总院(集团)有限公司 200125
- 2. 同济大学 上海 200092
- 折叠
摘要
输排水隧道需要同时承受外部水土压力和内部水压力作用,相比普通盾构隧道,衬砌结构轴向压力水平降低且存在开裂的风险,通常在隧道管片内部施作二衬以形成双层衬砌结构.本研究依托某既有大直径隧道改建为调蓄隧道的背景,采用数值模拟方法,分析界面粘结方式、二衬材料和二衬厚度等对双层衬砌结构受力特性和安全性的影响,并明确不同形式双层衬砌结构的传力机制,进而为结构选型和二衬设计提供建议.
Abstract
The drainage tunnel needs to withstand both external soil and water pressure and internal water pressure.Compared to ordinary shield tunnels,the axial pressure level of the lining structure is reduced and there is a risk of cracking.Usually,a secondary lining is applied inside the original tunnel segment to form a double-layer lining structure.Based on an existing large-diameter tunnel into a regulating and storage tunnel,Numerical simulation methods were used to analyze the effects of interface bonding methods,secondary lining materials,and secondary lining thickness on the stress characteristics and safety of the double-layer lining struc-ture.The force transmission mechanisms of different forms of double-layer lining structures were clarified,and suggestions were provided for structural selection and secondary lining design.
关键词
隧道改建/二衬/双层衬砌结构/界面粘结方式Key words
Tunnel reconstruction/Secondary lining/Double lining structure/Interface bonding method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据