Research And Implementation Of Integrated Urban Underground Pipelines Management System Based On Geodatabase

Underground Pipelines are important components of urban infrastructure, and which offer major information in the urban programming, construction and management. Urban underground pipelines are just like the"nervous"and"vascular"of human body, which transmit information and transport energy day and night. It is the material basis of the urban's survival and development and is called"lifeline".To master and ascertain the status of urban underground pipelines, to set up advanced underground pipelines management system, and to enforce underground pipelines dynamic-update mechanism and file archiving system strictly, which are the requirements of not only the urban's economic and social development, but also the urban programming, construction and management. Moreover, it is the requirements of seismic, prevention and response to emergent accidents. It is great realistic and far-reaching historical significance to maintain the normal operations of urban"lifeline", to guarantee people's common operations and social development.In this dissertation, the project of"The Detecting and Surveying Underground Pipelines and Its Information Construction"is taken as background. The Author involved in the whole project and focused on the construction and implementation of underground pipelines management system, especially studied on the technical standards system, database building technology, data model, system development and system architecture design based on Oracle 9i and ArcGIS platform for urban underground pipelines project construction. With research and implementation on underground pipelines information management from technical and management mechanism, we solved some key problems and algorithms for underground pipelines management system (brief. XMUPIS) and set up dynamic-update mechanism of underground pipelines. So the reality and veracity of pipelines data are ensured, and the functions such as spatial analysis and decision support for underground pipelines are also exerted effectively. Major contributions of this dissertation are as follows.1. Based on the study of urban underground pipelines information construction at home and abroad, with the detecting and surveying experience and system applying requirements, those ideas such as the technical standards system for underground pipelines project, information management model for underground pipelines and dynamic-update mechanism are provided innovatively. Those also provide technical rules for construction, implementation and application of underground pipelines management system. Meanwhile, this project is considered as a successful example for other domestic cities in the information construction of underground pipelines.2. In order to ensure the quality of database building, the"Database Building Rules for Underground Pipelines System in Xiamen"system was established, and the database building for the reunification of synthetic underground pipelines and relief map by using Geodatabase Spatial Data Model was realized firstly. Those data include synthetic underground pipelines, 1:500 zonary relief maps and 1:1000 all elements relief maps. It is beneficial for underground pipelines to a deeply network analysis such as explosion analysis, valve clearance analysis, longitudinal-cross section analysis and 3D dynamic display, etc.3. During the database construction, we have put forward the standards of underground pipelines in the database structure design, hierarchical design, classification and coding methods, and set up the Geodatabase Data Model of"Network– Pipeline– Segment– Point"by adopting dynamic segmentation technology. Based on Geodatabase Data Model, the database building of content, process and implementation were studied deeply. Thus, those key problems in the system development are solved such as underground pipelines spatial data gathering and building, 3D emulation of pipeline, optimization of special pipelines based on genetic algorithms and distributed application, etc.4. With the leading ArcGIS software platform and Oracle 9i database system, based on the combined model of B/S and C/S, the scalable system architecture was raised which included five professional subsystems such as synthetic application, database building, dynamic update, inner network and outer network publishing by the combination of Geodatabase, ArcObjects and MapObjects. Those subsystems are designed according to the user's requirements and each one keeps both independent and data sharing. So, the technical support for different application requirements is provided respectively.5. The XMUPIS was analyzed and designed scientifically and induced software supervision mechanism in the processing of system developing. The aim is to build the system with some certain stability, standardization, practicality, expansion and maintenance. This system realized some functions based on the digital relief map and underground pipelines database which are pipelines data management, query and display, statistics and output, section analysis, spatial analysis, pipeline projects aided design, integrated maps, 3D pipeline emulation, etc..