Abstract: In recent years, with the continuous acceleration of the urbanization process, the scale of my country's transportation construction has continued to expand. Many advanced technologies have been introduced into the construction of bridges and tunnels, and good results have been achieved.However, in the actual work process, aff ected by many factors such as weather and geological conditions, there are certain diffi culties in the construction of bridges and tunnels. If eff ective measures are not taken in time, a series of problems such as cracks are likely to occur.Based on this, it is necessary to introduce some advanced construction techniques when carrying out bridge and tunnel construction.Research has shown that through the reasonable application of grouting technology, cracks and other problems in the project can be eff ectively improved in a short time, thereby greatly improving the construction quality of bridges and tunnels.