Tunnel health monitoring system by using the tunnel crack index

山岭隧道衬砌拱结构一般采用素混凝土施工。因此，衬砌混凝土出现裂缝的原因是多方面的。因此，无论是裂缝的宽度、长度、密度，还是对衬砌单个裂缝的裂缝的方向性和成因区域位置进行综合评价，都是衬砌混凝土健康监测的重要内容。而且，每个不同的组织都采用了分类评估的方法。然而，提出合理的隧道基础设施资产管理体系，还需要更客观、更定量的指标评价方法。本研究以实际隧道裂缝调查为例，验证了作者提出的隧道裂缝指数(TCI)这一新指标在衬砌混凝土健康监测中的适用性。此外，还开发了基于TCI的隧道资产管理系统。该系统由数据库系统和地理信息系统组成，对山口县113条隧道的纸质隧道数据进行了扫描，并进行了数字化信息数据的转换。然后，将隧道数据手册中描述的隧道信息(隧道名称、隧道位置、隧道全长、类别、尺寸等)存储到隧道数据库中。在此基础上，利用TCI分布建立了隧道数据手册信息和隧道健康状况地理信息系统。在此基础上，以最小化隧道全寿命周期成本为目标，对隧道资产管理系统进行了研究。

Generally, the lining arch structure of the mountain tunnel is constructed by plain concrete. So, the cracks on the lining concrete have occurred by various causes. Therefore, not only widths and lengths, density of the cracks but also the total evaluation by directivity and genesis region place of the crack of individual crack on the lining are important for the health monitoring of the lining concrete. And, a categorized evaluation method has been adopted at each various organization. However, the index which can more objectively and quantitatively evaluation method is desired to propose the reasonable asset management system of tunnel infrastructure. In this study, the applicability of the new index called as the Tunnel Crack Index (TCI) for health monitoring of the lining concrete which the author has proposed is examined against the real tunnel crack investigation. In addition, the tunnel assent management system based on TCI has developed. This system consists of the data base system and the geographic information system.The scanning of paper based tunnel data book of 113 tunnels which controlled Yamaguchi Prefecture was done and it converted the digital information data. Then, tunnel information such as (tunnel name, tunnel position, overall length, class, dimension, etc ) described in the tunnel data book was stored into the tunnel data base. Then, the geographic information system which displayed information of the tunnel data book and the tunnel health situation by using the TCI distribution was made. Using this GIS tunnel database system, the asset management system for tunnel was examined for minimizing life cycle cost of the tunnel.