Research On Time Optimization Of Control Of The Project About The Making And Contrating Of Box Beam Of He-Ning Railway Engineering

New railway line in Xi'an, Nanjing, Hefei to Nanjing Section, located in Shanghai and the Han-Rong fast-track the eastern part of national planning ,Which is one of "four vertical and four horizontal net of expressing passenger". The line from Hefei port hub station 30 to bring out the He-ning along the highway,to east Feidong, Chaohu City, to Nanjing in Jiangsu Province, is 166 kilometers in all length lines. He Ning railway project is the first article of the rapid speed of 200 km railway,whose roadbed and bridges with control standards high and high technology. The project have a great deal of works, meanwhile a tight construction period. According to the characteristics of the production box and related regulatory requirements, the box beam have a complex manufacturing process and a long process period. The project is the focus of the company's construction projects, management and control of the project quality, progress and investment by the Ministry of the project is a great significance.This paper, which based on the theoretical basis of Project management body of knowledge, give the introduction of procedures of project management ,analysis in the item of railway projects and the engineering characteristics and the project difficult to take the construction of the project network , we formulate plan and construction process , which give a adjust in time following tight construction period, meanwhile the box of the larger engineering work production process a detailed construction network plan and give the progress of the project construction plan a optimization, analysis existence problem of previous project plans to implement the process, the use of CPM method keeped new ideas, methods and technology, carry out project management, by optimization of project plan and cost to promote the completion of project by keeped quality and quantity And met the project required.