The Whole Sets Engage In Construction Technology Of Ninety Metres Span Whole Floatable System Self-anchored Cable Suspension Bridge

Zhuyuan Large bridge lies in the midtown of Suzhou City with total length of 378m, it spans Jihang Grant Canal which is busy for watercourse transportation, it is important tache to connect Suzhou midtown with new District, and it is one of emphasis works of Suzhou City. The main bridge is designed as self-anchored cable suspensinon bridge in thress spans (33+90+33)m, the width of deck is 37m, the structure is stell frace concret twice casted beam, cable tower is separate half-bowstringstructure, the modeling is novel, and it is honored as"Bridge Queen".The main characteristic of this engineering is as follows: First: self-anchored cable suspensinon bridge with spans of 33m plus 90m plus 33m(33+90+33m) applied in the main bridge, it is unique in similary bridge in our country, it is unique in construction without supporting frame, the technology is complex, and science and technology content is high; Second, separate whole floating system between steel-concrete twice casted beam and tower beam is applied in main bridge, it is difficult for construction and strict for quality requirements; Third, half bowstring with smooth linear and novel modelinh is applied in main tower, the technology standard and quality requirement is high; Fourth, this bridge lies in Suzhou midtown, it spans Jihang Grant Canal, there is much interference in construction, and the requirement for civilization construction and water protection & environment protection is high.Focus on the characteristic and difficulties of this project, the following factors are performed: First, common rotate drilling machine is applied for underground continuous wall; Second, special structure is applied in cable tower; Third, end transverse beam construction; Fourth, erect and adjust simple cableway; Fifth, erect main cable, as well anticorrosion and linetype control; Sixth, install cable clip and cable hanger; Seventh, studying of construction technology for making and erecting steel beam, as well as linetype control and cable stress adjusment. The abovementioned factors have been succeeded completely, it settled such construction technology difficulty as beam before than cable, insured engineering quality and construction safety, and it has winned better social and economic benefit.