Study On Techniques For Temperature Control Of Pump Concrete Of Baoying South-to-North Water Diversion Elbow Pumping Station During Construction

The key project of Baoying pump station, as a headwaters project of the project of South-to-North Water Diversion in east of China,is locate in Baoying country, Jiangsu province. The pump station is principally use to buildup a First grade pump station with pump station of Jiangdu to suffice the first-stage construction of the project of South-to-North Water Diversion in east of China, and pump drainage water logging from Lixia River zone.The structure style of hydraulic pump station is very complex. It is a unassailable truth that there is crack occur in concrete of those established pump stations during construction period. And the building owners, designers and constructors were puzzled for that for a long time.For supply better experience and insurance to posterior similar pump stations, the building owners approve and initiate this project and consign Hohai University to study it. This task should have very important theory value and utility value.We adopt study methods and technical lines as following:1. We adopt finite-element method to simulate the unsteady temperature field and stress field, to study temperature control and crack prevention of concrete of pump station, and to get result of dynamic simulate analysis to the temperature and stress field of concrete in whole construction process.2. Coorperate with the managers and constructors of the project, base on the result of simulate calculate and analyzes from finite-element method, predominate the quantized stress position and the specificity of possibledehiscence and supply coherent information to the managers and constructors. 3. Base on the back analysis and comparative analysis to field data, verifyand comment the exiting schemes, progress feedback analysis on construction, summarize experience and select measures of crack prevention to insure there is no or little crack in concrete structure.