Research on Reinforcement Cage Connection Techniques for Cast-in-Place Concrete Piles

In this study, various techniques for connecting reinforcement cages in cast-in-place concrete piles are being investigated with the aim of enhancing their overall structural integrity and performance. The traditional method used for connecting steel bars in construction is through overlap. However, there are several issues associated with the overlap or welding shear splicing of steel bars, including insufficient overlap length, poor welding quality, increased labor costs, and joint failures. To address these challenges, a new technique for splicing steel bars is being researched. The focus of the study is on two main aspects: the tendency of loosening at the coupler connection area and the difficulty in aligning the two connected steel bars. To tackle these problems, the use of a shape memory alloy self-repairing coupler for steel bars is proposed. This innovative coupler has the capability to strengthen the connection between the steel bars and the coupler, improve the quality and speed of the connection, and also offer real-time monitoring and recoverable advantages.