A Waveform Steel Webs Back Without The Part Of The Cable-stayed Bridge Construction Monitoring Technology Research

Waveform steel webs without cable construction process back part of the cable-stayed bridge complex,cable-stayed bridge design and construction highly coupled,construction process all kinds of affecting the structure deformation and internal force of the parameters(such as stents settlement,heavy,and the beam structure stiffness,temperature field,prestressed tension order and tension in size,and cable tension in error,and not only will these errors caused by the integral structure has great linear deviations,stress state will also and the theoretical analysis value deviation is very big,can make the quality of bridge construction in serious decline,can appear even engineering accident;To ensure that the bridge into the appearance quality and practical bridge after force are in the reasonable scope,in bridge construction process must be strict construction monitoring and control.Through the construction of monitoring and control the organic combination of the adjustment of the linear and internal control bridge,as far as possible to cross the bridge structure close to or to design linear expected value,ensure the whole bridge main control section stress value during the whole construction process in safe range,to ensure the normal operation of the bridge construction safety and.This paper XinMi city ZhenShui river bridge in water for practical engineering,the waveform steel webs cable-stayed bridge construction monitoring research part,mainly to complete the following job:1.According to the design unit provides bridge design drawings,using finite element software based on the Midas/Civil can simulate the waveform steel webs back part of the cable-stayed bridge construction without the whole process of calculation model,based on the actual bridge material properties,and combining with the construction error on the situation of calculation model to correction,for the compliance with steel webs wave back part of the cable-stayed bridge without the actual finite element calculation model.2.On a waveform steel webs back on the part of the cable-stayed bridge without the entire construction process simulation analysis,analysis shows that the main girder structure section are in compression state,by pressure are in bridge design specifications set area,the results show that the bridge structure security;The calculation results for waveform steel webs back part of the cable-stayed bridge construction without the monitor to provide the theory basis.3.Formulate waveform steel webs cable-stayed bridge construction of monitoring schemes to feedback control method guidance waveform steel webs of cable-stayed bridge construction supervision of implementation.Use of the measured data,and the model calculation value contrast,get error value and adjust it.4.On a waveform steel webs cable-stayed bridge construction process of implementing monitoring,using the monitoring tracking measurement instrument control section in bridge each construction stage of internal force and deformation,and with the calculation results were compared,the comprehensive understand the bridge of the security situation,provide monitoring instructions,and guide the waveform of steel webs cable-stayed bridge safety construction.