Research On Construction And Maintenance Technology Of New Expressway Bridge Bearing

The support is an important structure connecting the superstructure and substructure of the bridge.It plays the role of conveying the superstructure load and adapting to the deformation of the structure.Its quality and working condition directly affect the durability and usability of the bridge.From the regular inspection data of the service expressway bridges in Guangdong,the bearing disease has become a common disease and multiple disease of the highway bridge.The cause of the disease is multifaceted.On the one hand,the purchase and installation cost of the support is not very important in the overall project cost of the bridge,and on the other hand,it is not paid attention to,on the other hand.Design selection,manufacturing,installation,maintenance and other aspects.In view of the characteristics of multiple and early onset of bridge bearing diseases in Guangdong area,this paper relies on Zhaohua expressway which has a cumulative ratio of 63% to the bridge,and carries out a series of research on the construction and maintenance technology of the new highway bridge from four aspects of design and selection,production and manufacture,construction and installation and maintenance and maintenance.The main research content and results are as follows:1.It is put forward that double support is adopted in the middle pier bearing of curved continuous box girder,and eccentricity is set up,which can make the force of the piers and piers support more reasonable,and at the same time it can make the force of the beam tend to be reasonable.2.A new type of anti slip highway bridge plate rubber bearing has been designed,which not only solves the problem of slip and loss in the normal operation of the bearing,but also realizes the quick and convenient replacement of the support.3.Put forward the admittance management method in the supply management of highway bridge support,and through the combination of factory inspection and verification test,selected the qualified candidate suppliers for the support of the project,standardized the supply management work of the new highway bridge support,and controlled the quality of the bridge support from the source.4.According to the structural characteristics of the plate type rubber bearing of the highway bridge,the plate type rubber bearing of the highway bridge is installed by the grouting method,which overcomes the problem that the pedestal flatness of the support can not meet the requirement of the installation precision.5.According to the common disease types of plate type rubber bearing,basin bearing and ball type support,the classification and inspection method of support inspection are clarified,and the inspection contents of the typical diseases of the bearing are refined,which can provide a useful supplement to the technical status evaluation of the support of the highway bridge and culvert maintenance code(JTG H11-2004).