Abstract：Taking the project of Renhechang shallow tunnel for Chongqing—Huaihua railway as the background，the field experiments of vibration effects of the ground in tunneling blasting have been done. Based on the measurement of the waveforms of the vibration velocity in different distances away from the tunneling blasting sources on the ground，the vibration characteristic of the ground and its varying laws are studied. Four blasting experiments for the shallow tunnel were carried out and twenty-seven waveforms of measured point vibration were obtained. The results of the tests and analysis show that：(1) the seismic effect of cutting hole blasting is the most intensive and its vibration intensity is over two times greater than that of the other blast-holes blasting；(2) the vibration velocities of the ground resulting from relief，breast and trim holes blasting do not always become greater with the increase of their single period charges；(3) the excavation region of the shallow tunnel may cause the hollow effect of ground vibration in tunneling blasting；and (4) the blasting vibration effect along the tunneling direction can be forecasted by Sadov¢s formula，but the formula is not suited to the forecast of the opposite direction. Moreover，for Renhechang shallow tunnel，the attenuation parameters of seismic waves along the tunneling direction are K = 232.8 and a = 1.90.
