Study Of Closure Technics For Long Span Continuous Rigid-frame Bridge

With the development of the transportation and the construction of highway, more and more continuous rigid-frame bridge was built,the bridge pier higher,the span bigger and more aperture count.the different closure schemes to the closure methods, internal force state, and linear of the continuous rigid-frame bridge has the important influence.The paper rely on the Han-jiang Bridge of the ten-day highway as the research background, consult a large number of references, discusses the construction measures of continuous rigid-frame bridge in closuring.The impact on different closure temperature to internal force is discussed and analyzed, linear and internal state backed the altering of different closure sequence is analyzed and calculated.The closure scheme was recommend as follow:first,side-span; nest, middle span, got application in Han-jiang Bridge, the results show that, line shape and internal force behind the Han-jiang Bridge is completed meet requirement of design, and the calculation methods of analysis and research results can be used at the similar bridge type.