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，衬砌混凝土产生裂缝的原因是多方面的。因此，衬砌混凝土的健康监测，不仅要考虑裂缝的宽度、长度、密度，而且要从裂缝的方向性和成因部位等方面进行综合评价。而且，在每个不同的组织中采用了分类评价方法。然而，目前还没有一种能够更加客观、定量地评价隧道基础设施的指标体系，从而提出合理的隧道基础设施资产管理体系。在这项研究中，被称为隧道裂缝指数（TCI）的新指标的衬砌混凝土的健康监测，作者提出了适用于对真实的隧道裂缝调查。此外，开发了基于TCI的隧道许可管理系统。该系统由数据库系统和地理信息系统两部分组成，对山口县管辖的113条隧道的纸质隧道数据手册进行了扫描，并将其转换为数字信息数据。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、总长、等级、尺寸等）存储到隧道数据库中。然后，利用TCI分布建立了隧道数据手册信息和隧道健康状况信息的地理信息系统。利用该GIS隧道数据库系统，对隧道资产管理系统进行了研究，以最大限度地减少隧道的寿命周期成本。

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.