| Technology for tunnel construction and substructure construction develops so fast that more and more rail tunnels longer than 3km appear with obvious feature of long, large and deep. Traditional method (MIS system connecting with graph files) cannot meet the requirements of multisource data management of long & large rail tunnels till developing GIS space technology provides a great renovation for it. Study of multisource data management platform for long & large rail tunnel is mainly on how to use data seamless integration technology, 3-D technology and data mining technology. Geological reconnaissance for rail tunnel involves various kinds of information including graphic and geological data from multi-aspects such as geology, topography, remote control and geophysical prospecting, with massive documentations and pictures corresponding. And how to store, manage and integrate those data efficiently concerns much to the study and application of modern GIS technology in rail geological reconnaissance.This thesis, on requirements of information integration, share and exchange from Ministry of Railways, raises a basic way to construct a geological space information share & exchange platform. On the base of universal rail engineering investigation & construction and standards & specifications of geological space, an information platform, used for centralizing and managing basic geo-data, as well as a multisource database can be established on a public hardware and network facilities, through which data integration of analysis & strategy systems could be realized. Here follows the details:1. Collecting multisource data of rail tunnel. Multisource data of rail tunnel mainly consists of basic geographic data, basic geological data, field-collecting data and multimedia data. Formats are various and a whole data handling & controlling procedure based on spatial information technology is designed.2. Designing and developing multisource data management platform and database. A geological reconnaissance database shall be set up on theoretical foundation of advanced GIS technology for dynamically managing, tracking, searching and spatially analyzing multisource data during the primary reconnaissance, comprehensive reconnaissance and final construction reconnaissance. Powerful GIS function of data organizing and analyzing can achieve complete share of basic geographical data & basic geological data & engineering investigation data, and integrated management of documents & pictures, as well as comprehensive application of visual analysis. It can also provide data service for other systems, through which can we realize efficient management and application of geological information science.The data of long large railway tunnel is complex and diverse ; seamless integration of spatial data technology, 3D technology, database mining and GIS component technology are used to achieve the large, long railway tunnel's multi-source data storage, management, integration, analysis, evaluation, modeling, visual management, etc. It's of major significance to the long large railway tunnel construction. |
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