| Currently, the freeway is booming in our country, our country has built more than 20,000 km highway. Bridges developed very rapidly cause bridges plays an importa nt role in highway engineering. Figure continuous prestressed concrete steel bridge, and it have much integrity, such as construction convenient, driving comfort., for these advantages it has been widely used in highway project especially in the western mountain highway. There are a variety of prestressed concrete bridge, continuous steel bridge is a kind of this bridge, and its mani form is box girder with variable cross-section. Article aiming prestressed continuous rigid frame bridge construction characteristics for Q ing Xihe bridge mo nitoring study. The main research work is as follows:1.Check the security of Q ing Xihe bridge by calculating. C hecking on the use phase of stress and stress tendons Checking, including the construction phase of each cross-section stress checking, checking the degree of disturbance, persistent stress condition checking, the main stress checking Beams, Beams main principal stress checking, checking pier stress and stress-beam steel checking.2.Check mobile Scaffold structures. Q ing Xihe bridge box girder superstructure construction using movable formwork, while the movable scaffolding structure checking using MIDAS finite element analysis software to calculate the first cross-construction process, Calculate the construction process, the first cross, standard across the end of the maximum stress and maximum cross-deformation and check carried out to calculate the maximum pivot bracket and the lateral force and overt urning Stability, obtained by checking that it meets regulatory requirements.3.We control principle elevation and construction monitoring to analyze the key issues and expand construction monitoring. its major projects include the monitoring of the main beam interference degree elevation control points: For each section move mold formwork, pouring concrete, prestressed tension elevation observations, as well as the main beam stress. We monitor the construction generated error analysis and theoretical results were compared with the actual measurements, and error adjustment, structural shapes predict the subsequent construction process, the proposed technical measures should be taken to follow the construction process, the construction of the necessary adjustment process and technology program to make a rear axle and linear structural internal force within the effective control of, and compliance with the design to maximize the desired state, to ensure construction quality and safety. |
