Cast-in-Place Cantilever Construction Design Of The Main Span Bridge On Suzhou West Ring Expressway Southern Extension Project

With the development of socialist economic construction,infrastructure construction by leaps and bounds.Bridge construction is an important part of the infrastructure construction,with the construction of more and more large bridge,continuous beam cantilever casting method since the last century since the 60 s first used by the former West Germany,because of its good flexibility,strong adaptability,does not need the construction support and a large number of temporary equipment,do not affect bridge navigation,traffic,construction not affected by season,the water level,has become an effective means of construction of large span bridge construction.This paper mainly discusses the construction control of the key link technology of continuous beam cantilever,the main contents include 0 block construction,hanging basket assembly,side span and span closure section of construction control points,construction monitoring and monitoring means.The construction of Block 0 and the closure section is the most critical link in the pouring construction,the construction of Block 0 should strictly control the quality of the foundation treatment and the erection of the support to ensure the stability and safety of the support.The choice of the form of the hanging basket and the way of its walking should be carried out on the basis of the comparison and selection.At the same time,the length of the joint section,the setting of the hanger,the pressure of the water tank and the selection of the temperature should be well controlled.At the same time in Suzhou city elevated western South extension across the Beltway high-speed main line bridge cantilever construction as an example,expounds the control and monitoring method of the cantilever bridge construction process is introduced and the basic means of control,ensure the cantilever construction in the internal force of the structure,the bridge line and elevation to meet the design requirements,highlighting the key points and difficulties of the project the.In addition,through the project of some of the traffic in the construction process of the guiding principles and measures to reveal how the middle part of the normal operation of the highway,the reasonable arrangement of construction schedule,a reasonable set of all kinds of traffic safety facilities,to meet the traffic guide reform to push forward the cantilever construction,for the future similar project to provide certain reference.