Research and Engineering Application of Modular Bridge-along Cable OFFSET

Abstract

The cable expansion compensation device， better known as OFFSET， is required as an expansion joint on the bridge. At present， the technology has its limitations and thus cannot meet the demand of narrow spaces and expansion joints of different sizes. This paper proposes a design scheme modularizing and miniaturing the OFFSET which copes with big， medium and small expansion joint compensation in limited spaces using continuous arc alternation technology， equally divided equidirectional synchronized mechanism and angle mechanism. The research discovery is applied to two 220 kV bridge-along cable projects in Zhejiang， completing engineering practice including manufacturing， installation， operation and maintenance， and resolving the real engineering problems.

Keywords

• bridge-along cable
• bridge
• expansion joint
• modularization
• equidirectional synchronized movement
• offset