Application study of NDT technology in bridge and tunnel

With the continuous construction of bridge and tunnel engineering, more and more examples show that the generation of disease will greatly shorten the service life of structure and even cause great harm to the operation safety of structure. Therefore, ensuring disease timely detection and diagnosis and treatment is an important measure to ensure the stability and safety of structure operation. However, traditional detection techniques have disadvantages such as low efficiency, strong subjectivity, and even damage to the structure. Nondestructive testing technology gradually enters people's attention and attracts people's attention with more and more attention. The development status of nondestructive testing technology in bridge engineering and tunnel engineering is summarized. They studied the NDT technology in bridge engineering and tunnel engineering two direction, in bridge engineering, analyzed the current application of various methods advantages and deficiencies, discussed with the continuous development of computer technology, the future NDT detection technology can be combined with various algorithms to achieve NDT detection technology in bridge disease detection. In terms of the tunnel engineering, the lining diseases, as a more common form of the tunnel diseases, will seriously affect the stability and safety of the tunnel operation. Therefore, the detection of the tunnel lining diseases is the most important content of the tunnel disease detection. Based on the common lining diseases, introduced the main types and influencing factors of lining diseases, the existing common nondestructive detection methods are summarized in apparent state detection and internal state detection, analyzed the advantages and disadvantages of image processing and 3D laser scanning, and discussed the development trend of NDT of lining diseases in the future.