Optimization Construction Methods Of Multi-tower Steel Box Girder And The Key Mechanical Issues Examination Of Erection

The sleek modern bridge construction, the construction of cable-stayed bridge,structural performance, ability to super leap, which has been the bridge experts,scholars and other construction worker who is widely recognized.Many characteristicsof the multi-tower cable-stayed bridge, more than ever to have all the advantages ofcable-stayed bridge, safer and more secure, more convenient construction, more costsaving and more convenient to apply.Program of long-span bridges, and planning anddesign, multi-tower cable-stayed bridge has become widely accepted, has been widelyused in the bridge construction at home and abroad.Planning, design, construction, monitoring, etc., are an important part of thecable-stayed bridge construction.Construction control is a key technology in thecable-stayed bridge during construction, has a crucial role in the success or failure ofthe bridge construction and efficiency.At present, domestic and foreign scholars on themulti-tower cable-stayed mostly lag beyond the design theory, methods ofconstruction and erection problems is relatively small.This article Bridge to Jiashao asthe engineering background study for the construction complexity of the project, itsconstruction process, brackets and steel box girder lifting force, focusing on its overallstability and the critical stage in the construction process analyzed.The main contentsare as follows:(1) In the analysis of the structural characteristics of the multi-tower cable-stayedbridge-Jiashao Bridge, and to determine on the basis of reasonable constructionprocess, using Midas/Civil2010space model, the simulation analysis of the wholeprocess, to verify the structural design and construction process to determine andcable-stayed drawn up by the cable tension rationality.Later on Jiashao Bridge construction phase of the ramp Lazio tension simplified. Theresults show that the reduction of a certain process is feasible.(2) Large multi-tower cable-stayed bridge without cable section requires the useof stents construction. The stent is an indispensable part of the multi-towercable-stayed bridge construction, strength and stability can not be ignored.Construction of the Jiashao Bridge side span cable District bracket and tower weeksSok district stent and stent installation luffing crane Pro components were studied andare safe structure. (3) As the span increases, the bridge main program used, the steel box girderdesign (construction) preferred. Jiashao main girder of the bridge steel box girderstructure is an example. By the following two factors: a) before the fulcrum of thecrane and lower section of a beam weight lifting process; b) lifting the roof towithstand its own weight. Therefore, the roof of local by uneven load and its strengthand stability checking is particularly important. The selected part of a typical steel boxgirder segment space finite element analysis.(4) In order to on with Bridge Jiashao at the as the background, to research the thethe stability of the of the multi-tower cable-stayed construction a critical stage.Analysis of influencing factors on the stability of the bridge, to increase the stiffnessof the main tower to a certain extent, improve the stability of the bridge, and eachpiece of the bridge by the double cable planes to change a single cable plane, willgreatly reduce the stability of the bridge, while increase the connection between eachpiece of the main beam, but also to some extent, improve the stability of the bridge.