Study and Application of Precast Concrete Joint of Diaphragm Wall

The application of precast joint has become an important development tendency of precast diaphragm wall.In this technique,precast joint is adopted in the construction of cast-in-site diaphragm wall instead of tube joint.The construction of precast joint is a relative economical technique which is also convenient for construction,and it can overcome a lot of difficulties such as collapsing of slots,flowing over of cement paste during concrete pouring,and pulling out joint when using conventional tube joint.Based on the research and application of precast concrete joint in Shanghai area,this paper mainly introduced the design guideline,construction techniques,relevant countermeasures and engineering application of precast joint.