Research Of The Construction Monitoring Of A Long-span Continuous Rigid Frame Bridge In High-mountain Area

After the reform and opening up of China's massive infrastructure, all kinds of bridges have erected. But with the long-span bridge construction, the construction process of a variety of engineering accidents are not uncommon, resulting in huge economic losses. Bridge construction safety and quality have been more and more attention, and the bridge construction monitoring technology has been comprehensive promoted ever since 1990 s.Presently, intelligent construction monitoring has been widely used in foreign countries, but China's bridge construction monitoring technology is still relatively low, and there is a large geographical gap. In this paper, the construction monitoring of a continuous rigid frame bridge is analyzed and studied based on Khan cow bridgein the high mountain area of Ganzi, Sichuan.The construction monitoring is closely related to the construction technology of the bridge. This paper firstly introduced the characteristics of the continuous rigid frame bridge and the characteristics of the continuous rigid frame bridge. The influence factors in the process of construction monitoring has also been analyzed, the influence degree of each factor as well, so as to provide a reliable reference for the later monitoring. According to the environment characteristics of the high mountain region, the current situation of bridge construction monitoring in high mountain area has been studied, the future development direction has been discussed. In order to ensure the construction safety and quality, the linear control, stress control and local stress of the prestressed anchorage are analyzed in detail. In the linear control process of the Khan cow bridge, combining the grey control theory, Midas-civil simulation and the inversion analysis theory, the control the forecast segment was elevated. In order to ensure the bridge linear to achieve the desired objectives, the elevation results were used to make timely adjustments, In the process of construction stress control, the selection of sensors and the reasonable arrangement of sensors in the high mountain area has also been carried out. According to the comparison of measured Results,1# pier and 0# block were found to be stress anomaly the causes were found out, and to evaluate the stress development trend, to ensure that during the construction period of stress in the controllable range, and ultimately ensure the construction safety and quality of the bridges. In the monitoring process of the bridge, when the sensor wire was damaged, the remedial measures were taken to ensure the integrity of the stress control point. Analysis and summary of various problems encountered in the monitoring process, put forward the improvement suggestions in the future monitoring process. Combining with the stress distribution theory model of anchorage end and the simulation model of ABAQUS, the local stress of the anchorage end of the bridge was analyzed, and the stress and strain distribution law of the anchorage end was mastered. According to the law of stress and strain, the measures to ensure the carrying capacity of the anchorage end are adopted, and finally, the safety construction of the.In this paper, a variety of advanced construction control theory and mature simulation software have been used to complete the construction monitoring and control of the construction safety and smooth. This paper was not only limited to the use of supervisory control theory, but also the closely combination of monitoring theory and construction management, so as to summarize the problems encountered in the process of construction monitoring, and to find out the construction monitoring wether needed to be improved optimization or not, to improve the bridge construction monitoring program.