In the process of quality management of road and bridge engineering, test and inspection work is an indispensable part, and it is a technical means to ensure the quality and safety of road bridges. Driven by the vigorous development of automation technology, computer technology and microcomputer technology in China, the road test detection technology has made remarkable progress. Among them, the non-destructive testing technology can complete the test without compromising the structure of the road and bridge, and judge whether the road bridge is at Under healthy conditions. At present, China's transportation industry is in a new era of rapid development, and it is of great practical significance to strengthen the application of non-destructive testing in road and bridge engineering.
1. Overview NDT
The so-called non-destructive testing technology is a general term for technologies such as engineering appearance defects, workpiece feature inspection and measurement, on the basis of no damage to engineering structure or quality. Non-destructive testing technology includes many aspects. Traditionally, it involves distinguishing between cracks in road engineering by tapping and listening. Nowadays, this method is still used. However, this traditional non-destructive testing method cannot accurately determine the location of the defect and has great limitations. Through non-destructive testing technology, it is possible to ensure strict quality inspection and acceptance standards, and to control road engineering quality within reasonable performance requirements, so as to avoid excessive quality of road and bridge engineering due to excessive improvement of engineering quality. Non-destructive testing technology can accurately determine the location of engineering defects, and will not affect the engineering design performance. If the engineering defects are within the machining allowance, they can be repaired or adjusted by the construction process. Quality requirements. Therefore, through non-destructive testing technology, not only can improve engineering construction efficiency, reduce production cost, but also meet engineering quality performance requirements.
2. The significance of the application of non-destructive testing technology in road and bridge engineering
At this stage, China's transportation industry is developing rapidly, especially in the continuous deepening of infrastructure construction in China, making road and bridge construction more and more important. Road and bridge engineering is not only related to the fate of China's transportation, but also the quality of road and bridge engineering is directly related to traffic safety, which determines people's life and property safety. In addition, the road and bridge project has the characteristics of long construction line, large project investment and large construction volume. There are many factors affecting the quality of the project, including not only the construction environment, geological and hydrological conditions, but also the construction technology. If there is a problem in the quality of any link in the construction process, it will seriously affect the quality of the project, causing huge losses to the project, and strengthening the detection of the quality of road and bridge engineering is of great significance. At this stage, China's construction project is mainly implemented with government supervision, social supervision and construction enterprise self-inspection as a guarantee system. In the operation of this security system, engineering inspection technology is very important. It can be said that engineering inspection technology is road engineering quality control. With the core of management. Relevant government departments, either supervisory enterprises or construction enterprises, need to supervise the laboratories that meet the construction requirements, and jointly complete the quality inspection of road and bridge engineering to provide guarantee for the smooth implementation of the project. As an important part of the construction technology management of road and bridge engineering, the detection technology is also an important link in engineering construction control and completion acceptance. Through the test and inspection of the quality of various workpieces and materials, it is possible to make a reasonable evaluation of the construction quality, ensure the quality of construction components and raw materials, and improve the overall construction quality of the project. In order to improve the quality of road and bridge engineering and extend the life of highway trials, it is necessary not only to carry out reasonable design of the engineering foundation, but also to strictly follow the acceptance criteria of construction materials and construction technical parameters, and to ensure the construction quality through strict quality inspection.
Through non-destructive testing technology, it can also ensure the full utilization of construction materials, and it is also of great significance for the promotion of new processes, new technologies and new materials, and make an accurate evaluation of the project quality. Through a lot of practice, it is proved that if the role of detection is neglected in the road and bridge engineering, it is difficult to guarantee the construction quality and bring the quality hazard to the project. In short, the significance of non-destructive testing technology for road engineering includes improving the quality of the project, ensuring the construction period, extending the service life of the project, and improving the economics of the project.
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