Research On The Construction Control Technology In The Replacing Bearers Of Continuous Girder Bridge

The bearers is the point between upper part and underpart in the bridge structure.Its function is to security transfer the load of the upper part of the structure to the bridge pier.Ensure the free-form deformation of structure because of the load of the upper part of the structure, temperature changes, shrinkage and creep of concrete factors and so on, so that the structure of the actual calculation of the forces in line with the schema and ensure that the beam and pier cap beams from damage.For some reason, most of bridge rubber bearing under varying degrees of damage, and some even threaten the bridge traffic, pedestrian safety, it is imperative to their replacement.Replacement of a bridge bearing is a very troublesome and important work, In this paper, a brief analysis of common diseases and reasons of bearing, the combination of the project introduces a practical use of the top lift, displacement and stress control of the three indicators. Pressure monitoring will help lift the top of the control, displacement control can guarantee the top position or the process of synchronization, stress measurement to avoid stress concentration within the structure of beam damage. In the process of replacement of bearings, in order to avoid the abutment and the pier starting at the top joint dpartment tun office consolidation may damage the main beam in from the top before. First of all, according to estimates from the top of the amount, computing tun office consolidated the main beam of the lower edge of the possible values of tensile stress, tensile stress values calculated in the grade of concrete should be less than the allowed value of tensile stress, and as a process from the top of the control value.At the same time to ensure that the process from the top of the roof jack up the amount of synchronization to prevent the jack lifting the volume as a result of inconsistencies, the deformation caused by inconsistencies between beams, and shear caused by damage to the bridge. From top to determine the location of the jack, and the location of local pressure, the partial pressure in order to ensure the safety of surface. Pressure, displacement and stress of real-time monitoring of the construction process can be effectively controlled to top up to avoid damage to the bridge, is a relatively safe and user-friendly method of construction control, the popularization and application of a certain value.