ANALYSIS OF ON-SITE VIBRATION MONITORING OF STEEL SHEET PILE DRIVING CONSTRUCTION

In this paper, the self-designed system for ground vibration acceleration monitoring was used to monitor the ground vibration caused by steel sheet pile driving in three sites with different soil properties. The peak acceleration and frequency characteristics of ground vibration were analyzed. The vibration attenuation law and the influence on surrounding buildings were discussed. The results show that soil strength has significant influence on the vibration caused by steel sheet pile construction. The penetration rate of steel sheet pile in soil with low resistance is high, causing slight ground vibration response. While in soil with high resistance, the penetration rate is low and the ground vibration is relatively much more obvious. The ground longitudinal and tangential accelerations caused by steel sheet pile construction are close to each other at the same depth, and have a trend to increase with the depth. There is little influence of vibration source distance and soil property on the dominant frequency of ground vibration caused by steel sheet pile construction. A good positive linear correlation shows between the dominant frequency of ground vibration and the vibration frequency of pile construction. The construction vibration of steel sheet pile attenuates rapidly in the range of 4m from the vibration source. The minimum safety distance of steel sheet piles for surrounding buildings due to construction is far smaller than that of soil compaction pile.