Abstract
We quantitatively study magnetic anomalies of reinforcement rods in bored in-situ concrete piles for the first time and summarized their magnetic anomaly character. Key factors such as measuring borehole orientation, borehole-reinforcement distance, and multiple-section reinforcement rods are discussed which contributes valid and quantitative reference for using the magnetic method to detect reinforcement rods. Through tests with model piles, we confirm the accuracy of theoretical computations and then utilize the law discovered in theoretical computations to explain the characteristics of the actual testing curves. The results show that the Za curves of the reinforcement rod reflect important factors regarding the reinforcement rods, such as rod length, change of reinforcement ratio, length of overlap, and etc. This research perfects the magnetic method for detecting reinforcement rods in bored in-situ concrete piles and the method has great importance for preventing building contractor fraud.
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The work is supported by Transportation Research Project of Jiangsu Province (05Y015), China.
Bin Sun received his Bachelor of Science degree in 2002 from Nantong University of China. Now he is a PhD candidate at Nanjing University (successive postgraduate and doctoral programs of study). His recent research projects include engineering geophysics and ore exploration.
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Sun, B., Dong, P., Wang, C. et al. Quantitative analysis of magnetic anomaly of reinforcements in bored in-situ concrete pilesℜ . Appl. Geophys. 6, 275–286 (2009). https://doi.org/10.1007/s11770-009-0027-9
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DOI: https://doi.org/10.1007/s11770-009-0027-9