Table 1 Tested specimens and splicing methods.

BASE

Cast-in-place

ZP1

Previous URF connection

ZP2

Extrusion sleeve connection

ZP3

URF connection with 10d-long welding—identical position between two sides

ZP4

URF connection with 10d-long welding—staggered position between two sides

ZP5

URF connection with 15d-long welding—identical position between two sides

ZP6

URF connection with full-length welding