Construction Control Research And Practice Of 2-ring Single Pylon Cable-stayed Bridge

Cable-stayed bridges become one of the main long-span bridges type, because of its appearance, performance by the load, capacity across the river and the economic superiority. Structures will more delicate, more lightweight future and it bring to the construction more difficulties, therefore, the construction control system research of large-span bridges has important practical value. In this paper, a national cable-stayed bridge under construction for the project example adaptive control method is applied to the actual construction control, and tower and beam synchronous construction methods is proposed.A forward-analysis method is introduced, in which the actual construction process is considered. The influences of geometric nonlinearity are taken into account. Adaptive control method is currently considered the best method to cable-stayed bridge construction control. The synthetic method of the least bending energy method and the stress balance method was used, and cable forces are adjusted to get the reasonable forces. Those provide a theoretical basis for the construction control of cable-stayed bridge.This paper introduces the practice of the cable-stayed bridge control method, monitoring of practical reference value. It has been discussed the pair of arch tower assembling job practice. The home position assembling method surpasses the whole vertical extension method: Reduced the time, saved the cost, and the plan economy. But the home position assembling construction also has many difficulties, how is the key to controls in the main tower hoisting process the measuring error. This article analyzed through the model simulation has arched the tower assembling process each working procedure, It has affected the tower synchronization construction the key working procedure to carry on the stress analysis, and has arched the tower to close up smoothly lays the corresponding rationale.