Abstract
A bearing capacity estimation method for bridge piles was developed. In this method, the pulse echo test was used to select the intact piles; the dynamic stiffness was obtained by the impulse transient response test. A total of 680 bridge piles were tested, and their capacities were estimated. Finally, core drilling analysis was used to check the reliability of this method. The results show that, for intact piles, an obvious positive correlation exits between the dynamic stiffness and bearing capacity of the piles. The core drilling analysis proved that the estimation method was reliable.
Highlights
The ultimate capacity of a single pile is regarded as one of the most important issues in pile testing [1]
The low-strain dynamic test, known as the pulse echo method (PEM), is a method that is usually used to check the integrity of the pile
The velocity spectrum is divided by the force spectrum to determine the mobility or mechanical admittance spectrum [10], which helps provide more information compared to the PEM to identify defects near the top of the pile [11]
Summary
The ultimate capacity of a single pile is regarded as one of the most important issues in pile testing [1]. Some key information from the graph, such as the peak/mean mobility ratio, mobility, and damping, is widely used to evaluate the pile integrity and pile length [12,13,14,15]. Another important parameter from the curve was the dynamic stiffness (Kd). Kd is the slope of the low frequency (i.e.,
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