Pile Stud Method

As connecting method for existing concrete pile and foundation slab, conventionally after arrangement of reinforcement cage into inside pipe, infilling concrete method was mainly used, but improvement of endurance of connecting part and workability of construction is thought to be necessary.
Then we developed Pile Stud Method, pile head joint technique, by which design and construction work can be done making maximum use of pile function, and furthermore construction waste and man hour can be extremely reduced.
Pile Stud Method is a stud welding method by which Pile Stud Deformed Bar (KSW490) can be welded to Pile Head Steel Plate as joint bar.
*Pile Stud is a trade mark of Nippon Stud Welding Co., Ltd.

Certificate of examination for construction technique

• Secure stress transmission
• Wide variety of reinforcement bar selection

• Excavation depth 10cm at pile hollow part
• Simplification of work process

• 78 – 95% reduction of excavation at pile hollow part

• Construction work by skilled pile stud welding workers

In order to support rationality of this method at the engineering point of view and aim to authorize, pile bent test with cantilever method was conducted by military of construction Building Research Institute. This resulted in remarkable difference in destruction property as compared with conventional method.