Research on Influence Laws of Vibration by Rotary Drilling During Foundation Excavation on Surrounding Buildings and the Environment

To study the influence law of vibration induced by rotary drilling during foundation excavation on surrounding buildings and the environment, the vibration of the adjacent ground and buildings were monitored under construction of rotary drilling for foundation excavation of the comprehensive well 5 in Shenzhen metro line 16. The following main conclusions were drawn based on time and frequency domain analysis on the field-recorded vibration data. Firstly, the vertical vibration of surrounding buildings caused by rotary drilling was stronger than horizontal vibration. Secondly, the vertical peak particle velocity (PPV) and the vertical vibration acceleration level on the floor of adjacent buildings linearly increased as the floor rosed. Thirdly, in the one-third octave spectrum of vibration acceleration, the maximum vibration acceleration in the vertical direction increased with the increase in the floor. The floor vibration in vertical and horizontal directions caused by rotary drilling was mainly in low and medium frequencies, mainly concentrated in 4 to 40 Hz. And the range of center frequency corresponding to the horizontal and vertical peak vibration acceleration of the nearby buildings was in 8 to 25 Hz. Finally, except the maximum vertical vibration level on the roof and the surrounding ground were larger than 75 dB, the maximum vertical vibration level measured at other observation points was below 75 dB. The relevant findings were of guiding significance for analysis of the impact of vibration induced by rotary drilling on surrounding buildings and the environment.