Abstract
A tunnel is a coupled system of the surrounding rock and the supporting structure. The health status of a tunnel structure is complex and is influenced by various factors. In addition, these factors are coupled and interacted with each other, which calls for the linguistic description of the tunnel safety level. In this paper, we describe the health status of a highway tunnel structure in terms of four levels: safe; basically safe; potentially unsafe and unsafe. Based on the analysis of the safety characteristics of the tunnel structure and its proposed safety level, this research develops a multi-level fuzzy synthetic evaluation model for the long-term safety evaluation system of a tunnel structure. The Cang Ling Tunnel, which has embedded sensors to measure the stress values of the secondary lining and the contact pressure, is used as an example to study the proposed method. The results show that the structure of the entire Cang Ling Tunnel is in almost a safe condition under the current conditions, which is consistent with the actual operational situation.
Highlights
Over the past two decades, China has observed the rapid development of highway and railway transportation systems, including many tunnels
Evaluation of Structural Health Status of Cang Ling Tunnel Based on Filed Data
The safety status of the tunnel structure is a complex system that is influenced by various factors
Summary
Over the past two decades, China has observed the rapid development of highway and railway transportation systems, including many tunnels. With the increase of the service time of these tunnels, various problems, such as lining cracks, water leakage, and even falling linings, have been widely observed and attracted attention from practicing engineers and academic researchers. The concepts of “prevention” and “early discovery” have been developed and gradually put into practice. The long-term structural monitoring of tunnels that pass through complex and special environmental conditions has received additional attention in recent years. One example is the research on the application of structural health monitoring in Hangzhou Qiantang River Tunnel done by Wu et al [1]. Ke et al studied the structural health monitoring system for Nanjing Yangtze
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