The shaking table test of buried pipelines under multi-point non-uniform excitation is carried out to investigate the nonlinear seismic response of site soil with the use of a nine sub-table array shaking table system in Beijing University of Technology. Through experiments

the macroscopic phenomena

the dynamic characteristics

and the acceleration response of site soil during vibration were observed. Also

the seismic response characteristics and variation of the soil under different earthquake motions and different seismic intensities were studied. The acceleration amplification factor of the free-field and non-free-field soils and the acceleration time history and Fourier spectrum of the same measuring point were compared. The results show that the seismic response of the soil is not only related to the ground motion record and the loading level

but also has a relationship with the buried structures. The damping ratio and the basic frequency of the non-free field are larger than the parameters of the free field. The seismic response of the pipeline is basically subordinate to the response of the soil under lower loading level

but with the increase of loading level

the restraint effect of soil decreases

and the acceleration of the pipeline is slightly larger than that of the soil. The existence of the buried pipeline has a certain influence on the dynamic characteristics of the soil within a certain range

but if the location is beyond that range

the impact will be rapidly weakened. The conclusions obtained are consistent with the macroscopic phenomena of seismic response obtained by the test

which corroborated each other's rationality. Furthermore

the conclusions support the analysis of seismic damage mechanisms of subsequent buried pipelines.