Research on Reliability of Straight Thread Connection of Reinforcement Cage of Bridge Foundation

With the continuous improvement of bridge construction technology in our country, although service life has been greatly extended, mechanical connection steel bar is still stage straight thread connection, which nearly 30 years behind that foreign countries. According to development status and application requirements China, it great practical significance explore new technologies methods solve problem insufficient strength reinforcement. In this paper, reliability reinforcement foundation cage studied as main breakthrough point, problems encountered are analyzed.