公开(公告)号：US20230167614A1

公开(公告)日：2023-06-01

申请号：US17982522

申请日：2022-11-08

Applicant: KOREA RAILROAD RESEARCH INSTITUTE

Inventor： TAEHOON KIM ,  Ki Young Eum ,  InHo Yeo ,  Yun Suk Kang ,  Dae-Sang Kim ,  Choon Seok Bang ,  Sungil Kim ,  Jeong Ryol Shin ,  KI HYUN KIM

IPC: E01D19/02 ,  E01D21/00

CPC classification number: E01D19/02 ,  E01D21/00 ,  E01D2101/285

Abstract: 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.

公开(公告)号：US10662588B2

公开(公告)日：2020-05-26

申请号：US15580354

申请日：2016-05-19

Applicant: KOREA RAILROAD RESEARCH INSTITUTE

Inventor： Yong Hyeon Cho ,  Jin Yu Choi ,  Yun Suk Kang ,  Joo Uk Kim

IPC: E01B5/08 ,  B61C15/08 ,  B61H11/00 ,  E01B5/02 ,  B60B17/00 ,  B60B21/08 ,  C21D10/00 ,  C21D9/34 ,  C21D9/04 ,  B60B19/00 ,  C21D1/09 ,  C21D1/10

Abstract: A friction apparatus is provided. The friction apparatus includes: a first member having a first surface; and a second member having a second surface that contacts the first surface, and moving while in contact with the first member, wherein at least one of the first surface and the second surface is hardened.