Simulation Study On Temperature Field And The Effect Of Pipe Cooling By Multi Parameter Combination In Sluice During The Construction Period

With the development of water resources, sluices, as the construction for water retaining, drainage or water building, has been widely applied. Since concrete structures such as sluices are mostly built from high-performance concrete, the hydration thermal reaction usually takes place relatively quickly, releasing large amounts of heat, and thus lead to dramatic changes of internal temperature. As a result, cracks easily occur on the bottom plate and pier of the sluices, affecting the properties of sluices, such as waterproof ability and pressure resistance. Therefore it is particularly important to control the temperature and prevent cracks of sluices.In this paper, based on the summary analysis of predecessors’ research work on temperature field, stress field and cooling water pipes, the parametric programming language in ANSYS, a commonly used finite element analysis software, was used for programming. The indirect coupling algorithm of thermal-stress was applied to calculate the temperature field and creep stress field. Then possible locations and reasons for that were given out through analysis. As an effective measure to control the temperature and prevent cracks, cooling water pipes were embedded into the bottom plate and pier of the sluices. Parameters such as the water temperature, the spaces between the pipes, the flowing time, the arrangement were all closely related to the cooling effect. Based on the heat-flow coupling algorithm, the effects of different parameters over cooling were quantified. And three of them, including the spaces between the pipes, the arrangement and the flowing time, with the actual situation of the sluice considered, were selected for combination research to achieve the best cooling effect during the whole construction.Due to the huge influence of pipe spacing over the cooling effect, the water pipes were gradually arranged closer. Since the structure section of the sluice was relatively special, the cooling effects over the bottom plate and pier were compared. Eventually the space between pipes was determined to be 1.0m for the bottom plate and 0.75m for the pier. On this basis, the arrangement for cooling water pipes at the same level was then optimized. Two-way arrangement was put forward and simulated, and the results showed that:Compared to one-way arrangement and symmetric arrangement, the bidirectional arrangement can effectively even the distribution of the temperature inside the bottom plate, reducing creep the temperature stress. Finally the flow period of water was determined. All of the experiments in the paper provided the theoretical basis for effectively preventing cracks of the sluices.