Abstract
Yangtang Bridge is a single-tower, double-cable-plane, inward-inclined cable-stayed bridge with a total length of 607 m. The main tower features an H-shaped structure with a height of 65 m, and is equipped with 17 cables in total, among which cables 1-8 are cable conduits and 9-17 are steel anchor boxes. To prevent collision between cables and conduit openings and to improve construction efficiency, the precise positioning of cable conduits and steel anchor boxes is critical. Based on actual engineering practices and construction conditions, this paper proposes a three-dimensional coordinate positioning method for cable conduits, and investigates precision positioning devices for conduit openings along with installation techniques for steel anchor boxes, thereby ensuring precise and efficient construction of cable conduits and steel anchor boxes.
Full Text
Precision Positioning Construction Technology for Cable Conduits and Steel Anchor Boxes in Cable-Stayed Bridges
Yuan Hong, Yuan Tao
China Railway 16th Bureau Group Third Engineering Co., Ltd., Huzhou, Zhejiang 313000
Abstract
Yangtang Bridge is a single-tower, double-cable-plane, inward-inclined cable-stayed bridge with a total length of 607 m. The main tower employs an H-shaped structure with a height of 65 m, and incorporates 17 stay cables—cables 1–8 are equipped with cable conduits, while cables 9–17 utilize steel anchor boxes. To prevent collision between stay cables and conduit openings and to improve construction efficiency, precise positioning of cable conduits and steel anchor boxes is essential. This paper proposes a three-dimensional coordinate positioning method for cable conduits based on actual engineering and construction conditions, and develops a precision positioning device for conduit openings along with installation techniques for steel anchor boxes, thereby ensuring accurate and rapid construction.
Keywords: single-tower double-cable-plane; cable-stayed bridge; cable conduit; steel anchor box; positioning construction technology