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| I background of bridge inspection 1 Frequent bridge accidents With the development of public bridges in China, there are more and more bridges At the same time, many existing bridges have gradually entered the stage of maintenance and repair Relevant experts believe that bridges that have been used for more than 25 years will enter the aging period According to statistics, 40% of the total number of bridges in China already fall into this category, all of which belong to “ Aging ” Bridges And with the passage of time, its number is still growing, and Bridge managers have paid more and more attention to the maintenance of bridges In order to meet the requirements of the continuous development of highway transportation load, make full use of the existing highway bridges, so that they can continue to serve highway transportation safely, the bridges must be identified according to the requirements of the technical specifications for highway maintenance issued by the Ministry of communications With the development of bridges in full swing, the ensuing bridge construction accidents have also frequently sounded the alarm of safety production 2 Summary of bridge construction safety accidents The frequent bridge construction accidents are shocking, and the reasons may be different The negligence of geology, survey, design, construction, supervision and other processes may lead to safety accidents, http://www chinajy-sh com cn/ But one thing is certain The accident reflects the lack of safety construction monitoring technology and means, as well as the lack of construction safety management and supervision The high-tech content and high-risk in bridge construction all need strong safety awareness, thorough safety management and strict safety supervision Bridge engineering is to a large extent a test of safety management The frequent accidents such as collapse are not only technical mistakes, but also the collapse of safety awareness In order to know the status of bridge construction at any time, give early warning of sudden accidents, maintain the safety and social stability of bridge construction, and prevent the tragedy like Hangzhou bridge collapse from happening again, it is urgent to monitor the safety of bridge construction! 2、 Bridge construction safety monitoring solution 1 Bridge online safety monitoring content (1) Geometric alignment monitoring and construction measurement, including: arch rib alignment monitoring, main beam alignment monitoring, main beam deflection monitoring, axis offset measurement, arch seat displacement measurement (2) Arch rib stress and strain monitoring (3) Stress and strain observation of steel box girder (4) Stress and strain monitoring at the stress concentration position of the anchor end of the tie bar (5) Tether cable force monitoring (6) Temperature monitoring, including: control section temperature value and ambient temperature value during construction (7) Material parameter test, etc (8) Monitoring of stability during construction |
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