Cast-in-placement pile with protective connection structure of coated steel pipe and composite structure of steel pipe

摘要

PURPOSE: A cast-in-place pile having a coating steel pipe protective connection structure and a steel-concrete composite structure is provided to improve the strength of a pile through integration of steel pipes and concrete in the steel pipes. CONSTITUTION: A cast-in-place pile having a coating steel pipe protective connection structure and a steel-concrete composite structure comprises steel pipes(10) which are connected lengthwise and bolt and nut connectors which are assembled together on the interior and exterior of the contact ends of the steel pipes. The bolt connector comprises a connector band and a bolt member which is extended from the connector band to the outside of the steel pipes by passing through the connection part of the steel pipes. The nut connector contacts the exterior surface of the steel pipes and has a through hole in which the bolt member is inserted.