Study on dynamic response characteristics of shallow buried pipe gallery structure under vehicle vibration load

The pipe gallery structure is a shallow underground structure, which is the dynamic response characteristics and failure of the pipe gallery structure caused by the vibration of the surface vehicle load are more significant. In this paper, taking an underground comprehensive utility tunnel construction as the research object, give the shallowly buried pipe gallery structure vibration characteristics and deformation mechanism under the condition of vehicle load. Meanwhile, this paper derived a model of the shallowly buried pipe gallery structure dynamic response affected by vehicle vibration characteristics, and the rationality was verified by carry out the model test. Some important points: (1) the stress characteristics of the top of the shallow buried pipe gallery structure are mainly as follows: both ends are pressure, while the middle is tension; (2) the stress characteristics of the bottom are opposite to that of the top; (3) the strain value of the pipe gallery structure is the largest in the range of 6 times the pipe diameter, and the dynamic response of the pipe gallery structure gradually decreases with the increase of soil depth; (4) Under the same depth condition, the below position of the vehicle is the most unfavorable; and the influence of load frequency on the dynamic response of the whole pipe gallery structure and stratum is more intense at low frequency. This paper provides a reference for the stability analysis and safety evaluation of shallowly buried pipe gallery structures under vehicle vibration load.