Study On Inclined Tower Construction Technology Of Ground-anchor Concrete Cable-stayed Bridge

Inclined tower cable-stayed bridge is a kind of elegant bridge structure form;Compared to straight tower cable-stayed bridge,cable tower and girder of the inclined cable-stayed bridge construction process more complex and more factors which affect the structure state error.The construction technology of inclined tower cable-stayed bridge demand is higher.Based on science and technology project of GuiZhou province transportation hall "the study on construction key technology of FuRong river extra-large bridge ground-anchor concrete Inclined tower cable-stayed bridge"(contract number: 2016-123-048)of the crosshead "Study on inclined tower construction technology of ground-anchor concrete cable-stayed bridge" as the research content.The following research work was carried out:1.The inclined tower of no cable area construction stage static analysis.Stress balance method is used to solve temporary support pushing force range of no cable area construction;using mathematical software MATLAB optimization pushing force value.2.The inclined tower of cable area construction stage static analysis.Introduces the concept of concurrent force system to the force analysis of cable tower area,analyzed included angle change rule between the resultant force consisted of the weight of the tower and cable force and the bracket support force and the tower axis.Based on resultant force direction change rule,research on the best time of Inclined Tower bracket dismantle.Discussed the order of bracket dismantle,and the influence to stress and line of the tower and girder.According to the stress characteristics of the tower construction Give Suggestions on the tower construction control sensors.3.Inclined Tower sensitive parameter analysis.Discuss the impact of girder weight and tower weight,pushing force,cable tension,girder stiffness,inclined tower stiffness,temperature variation and shrinkage creep of nine parameters on the tower construction and finished state of cable-stayed bridge.