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。
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.
作者
张晨光
柳献
张达石
Zhang Chenguang;Liu Xian;Zhang Dashi(Shanghai Urban Construction Design&Research Institute(Group)Co.,Ltd.,200125,China;Tongji University,Shanghai 200092,China)
出处
《特种结构》
2024年第2期30-38,共9页
Special Structures
关键词
隧道改建
二衬
双层衬砌结构
界面粘结方式
Tunnel reconstruction
Secondary lining
Double lining structure
Interface bonding method
