Circular steel tube concrete lengthening method

• Main Authors: WANG QINGLI, AN RAN, ZHANG YAN, DUAN CHANGZHI
• Format: Patent
• Language: Chinese; English
• Published: 29.01.2021
• Subjects: ASSEMBLY OF BRIDGES; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; OR VIADUCTS; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention belongs to the technical field of structural engineering, and particularly relates to a circular steel tube concrete lengthening method which is characterized by comprising the followingsteps: step 1, properly placing a lengthened steel tube body; step 2, performing preliminary connection through threads; step 3, welding the lengthened steel tube body and a thick-wall steel tube connecting body into a whole at a reserved groove of the thick-wall steel tube connecting body; step 4,preliminarily connecting the tube body of the other lengthened steel tube with the other side of thethick-wall steel tube connecting body through threaded connection; and step 5, welding the tube body of the other lengthened steel tube and the other side of the thick-wall steel tube connecting bodyinto a whole at the reserved groove of the thick-wall steel tube connecting body. The connecting joint is simple in structural form and clear in load transmission path, the working efficiency of concrete-filled steel tube conn