The Time to Eliminate the Expansion Joints of Diversion Pipeline in Wanjiazhai Hydropower Station

摘要

At present, many hydropower stations eliminate the expansion joints to solve the pipe leakage problem. It's very important to control the welding environment temperatures in eliminating the final weld joint of the expansion joints. To address this problem, by adopting three-dimensional finite element model in studying the hydro project of Wanjiazhai, this paper analyzes the stress state of steel pipe in all welding environment temperatures in details and suggests the proper range of welding environment temperatures. Researchers suggest that May is suitable to perform welding.