T/JSJTQX 26-2022 Active

Scope: This document specifies the basic requirements, testing instruments, preparation for testing, qualitative testing, quantitative testing, and testing reports for detecting the compactness of grout in pre-stressed holes using the impact elastic wave method. This document is applicable to the non-destructive detection of the compactness of grout in pre-stressed holes in pre-stressed prefabricated and cast-in-place components. Main technical content: After introducing the technical content of the "Technical Regulations for Detecting the Compactness of Grout in Pre-stressed Holes Using the Impact Elastic Wave Method", the construction of grout in pre-stressed holes is an important process to ensure the quality of pre-stressed structures. In recent years, quality defects in grout in pre-stressed holes have become quite common. As a concealed project, it is difficult to control the quality of grout in pre-stressed holes, and there is a lack of corresponding inspection methods. The compactness of grout can only be evaluated through destructive inspections, which is time-consuming and labor-intensive. The impact elastic wave method is a non-destructive detection technology that has emerged in recent years. Through practical research on the testing principle, testing methods, and data analysis methods of the impact elastic wave method, this document formulates technical standards for compactness detection using the impact elastic wave method, provides key points for operating the impact elastic wave method to detect the compactness of grout, and adopts criteria for judging the results of qualitative and quantitative testing. It provides a theoretical basis for the quality inspection of pre-stressed holes in highway bridges.