| The urban subway construction heat up in our country,among over 40 metropolises of a million,more than 30 of them have undergone urban rapid railway construction and pre-construction work until the end of 2005.During the period from 2006 to 2010,more than 20 subway projects are being constructed or ready for construction,expected to invest over 200billion Yuan.Such a large-scale underground railway construction witness a potential market for shield demand exceeding 15billion Yuan.For a long time,most shields in our country need to be imported with a high price,furthermore,domestic enterprise have to pay additional high labor cost as they have to rely on overseas manufactures for shield maintenance,considering the fact that core technology,key spare parts,controlling system and others are kept secret. Therefore,nationalization of shield has become an urgent task now.The tunnel advancing automatic guiding system is one of important control systems for the shield.Making use of advanced surveying technique,automatic control technology,electric sensor and computer technology,the system can calculate actual position of shield in soil,related attitude and advancing trend and other data. In this way,it can guide shield driving along the designed axis with accuracy,arriving at destination in the end.Its core technologies have long been mastered by a few oversea enterprises.Currently the automatic systems applied at home are mainly imported from overseas.As a result of lacking precise math and physic model,scientific reasonable systematic structure design and hardware equipment,domestic automatic guiding system still remains in the stage of autonomous study,not yet mature.Therefore,autonomous research on a set of scientific effective tunnel advancing automatic guiding system has become an issue of high concern between theory and reality,which needs to be addressed in development of domestic shield industry.Based on personal working experience on tunnel guiding work,relying experts and research groups of Shanghai tunnel Engineering Corporation,the author presents complete technology solution to tunnel advancing automatic guiding system. Meanwhile,during implementation of research on tunnel advancing guiding system, scientific project management theory and tools such as project life cycle,organization structure,period management,progress management,quality management,risk management and others are fully used to improve the efficiency and reliability of the traditional research mode,finally achieving success of system research. The essay includes seven chapters,focusing on research of tunnel advancing automatic guiding system.The first chapter----preface,mainly introduce background,purpose,significance of essay study as well as domestic and international research situation.The chapter two introduces the project task and objective of tunnel advancing automatic guiding system,and analyzes the importance of research and technological improvement on enterprise development.The chapter three carries out feasibility analysis on research of tunnel advancing automatic guiding system.The chapter four presents complete technological solution to research on tunnel advancing automatic guiding system.The chapter five set up detailed construction scheme of the project.The chapter six introduces project management application in implementation stage of project.The chapter seven is summarization and prospect.The technological solutions to tunnel advancing automatic guiding system in this essay are presented based on massively drawing on the advantages of oversea automatic guiding system,and fully combining practice on domestic shield construction,with system mold reliable and practicable.Meanwhile the essay applies advanced method of project management into implementation management of systematic research,thus ensuring research of system with high quality.At present, the system has been applied in underground construction of many cities nationwide, its actual accuracy entirely reaching the level of the same kind overseas and its good and inexpensive feature receiving universal high appraisal.The essay aims to provide effective control on implementation of project using scientific reasonable technological solutions to the project combining project management method,to increase success rate of development project,to present certain reference experience for similar project research.The research result of the essay receive subsidize from Eleventh Five-Year Plansubject 863 issued by National Ministry of Science and Technology--"key technology and sample manufacture of slurry balance shield",and mountain climbing scheme issued by Municipal Scientific and Technological Commission—"manufacture and application of large diameter slurry shield and combined shield"(No.06DZ11201 ), with Shanghai Tunnel Engineering Co.in charge of both subjects. |
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