Research On Alignment Error Of Cable-Stayed Bridge Based On Stream Of Variation

The cable-stayed bridge is one of the modern long-span bridges，the main type structureof the bridge includes the foundation, suspension cable, tower pier, girders and deck structure.Relative to the suspension bridge, cable-stayed bridge construction process is simple, morediverse forms and aesthetics, therefore, many cable-stayed bridge has become the citylandmark. Cable-stayed bridge in the transportation construction projects in the is graduallyincreasing, Therefore, the cable-stayed bridge design, construction and technologydevelopment stage of China’s transportation construction and national economic developmentwith the key issues. As the important part of the transportation system, the cable-stayed bridgeis continuously updated along with the related theories raise the level of construction toolsand technical equipment, which greatly promoted the development of cable-stayed bridge.Therefore, the cable-stayed bridge has gradually become an important research topic intransportation construction business.The cable-stayed bridge in the construction process, the construction of the main beam isof great significance for the construction of full-bridge. With the raising the level of designcalculations and installation capacity enhancement, to pursue and achieve the ideal bridgestructure geometric alignment has become an important indicator to measure the level oflong-span bridge construction, due to the calculation of the limit of the span and relatedconstruction environment, cable-stayed the main beam of the bridge construction is generallycantilever erection. Compared to support construction and pushing construction method ofconstruction, cantilever assembly has a short construction period, influenced by theenvironment, the process is simple.Domestic and foreign cable-stayed bridge the cantilever erection linear control ofexisting research results of this paper made a summary analysis of the cable-stayed bridgegirder Assemble Error sensitivity analysis. To determine the highest-performing assemblyprograms to improve the direction of the source of error sensitivity coefficient definitions andcalculation methods. Analysis of cable-stayed bridge cantilever erection process, types oferror sources and passed on the basis of the existing theory of error stream to establish themain beam assembly error stream state space model, modeling space the technologicalcapacity of the cable-stayed bridge assembly process. Derivation of the cable-stayed bridgegirder assembly error expression, the expression of including main beam linear displacementerror angular displacement error. Finally, from the controllability and observability of bothdiscussed in detail the applicability of the cable-stayed bridge cantilever erection error stream space model. Bridge during Construction of the Third Ring Road, Fuzhou City, Huai’an mainbeam cantilever erection control space model of the cable-stayed bridge cantilever erectionerror error flow theory, for example, are described in the application process of the linearcontrol method, through the final actual costs bridge status linear assessment proved thevalidity of the above methods.