Korea Railroad Research Institute

Ki Young Eum

Taehoon Kim

Ki Hyun Kim

Yun Suk Kang

Inho Yeo

Sungil Kim

Jeong Ryol Shin

Choon Seok Bang

Dae-Sang Kim

The present disclosure provides an assembly type bridge lower structure having a socket type elastic duct coupler and a method of constructing the same in which, in construction of an assembly type bridge lower structure that consists of an assembly type foundation part, an assembly type pillar part, and an assembly type coping part, a socket type elastic duct coupler is utilized, thus enabling shear key joining at connection portions of the assembly type foundation part, the assembly type pillar part, and the assembly type coping part, easily accommodating of construction error displacements of the socket type elastic duct coupler, improving watertightness at connection portions of the precast segments, easily accommodating an insertion angle of the insertion member including a steel strand, a steel bar, a reinforcing bar, a FRP, or the like, and preventing an overflow phenomenon that occurs when epoxy is excessively applied during bonding between the precast segments.

Assembly type bridge lower structure having socket type elastic duct coupler and method of constructing the same

The present disclosure provides a curve portion mold structure for manufacturing a curved concrete panel for a mountain railway rack track and a curved concrete panel manufacturing method using the same in which, by forming a curve portion mold structure made of an outer mold and an inner mold to manufacture a curved concrete panel for a mountain railway rack track, the curvature of the outer mold and the curvature of the inner mold can be simultaneously adjusted, and a curve can be implemented by a difference in pressure introduction of a screw jack at a side surface of the outer mold. Also, by dividing a bottom plate of the outer mold to form the bottom of the curved concrete panel, application to various forms of curvatures of the curved concrete panel is possible, and by implementing a curvature by coupling between blocks using a fastening pin in an inner mold made of an intermediate block, an end block, and an impact-absorbing block, the curved concrete panel for a mountain railway rack track can be easily manufactured.

Curve portion mold structure for manufacturing curved concrete panel for mountain railway rack track, and curved concrete panel manufacturing method using the same

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Gyeonggi-do, South Korea

Ki Young Eum