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基桩钢筋笼长度磁测井法检测技术日趋成熟,数据的采集质量关系到检测结果的准确性。通过分析基桩钢筋笼磁场特征,得出其特征公式。根据平行钻孔三节竖直钢筋和非平行钻孔三节竖直钢筋模型,利用特征公式得到正演磁异常垂直分量随深度变化的曲线。结合实际工程,可知钻孔与桩中心线的平行情况关系到数据采集质量,工程中应引起重视。
Pile reinforcement cage length magnetic logging technology is maturing, the quality of the data collected relates to the accuracy of the test results. By analyzing the magnetic field characteristics of pile reinforcement cage, the characteristic formula is obtained. According to the vertical steel bars with three vertical bracings and the non-parallel bored vertical steel bars of three parallel bores, the curves of vertical component of the anomalous magnetic anomaly with depth are obtained by the characteristic formula. Combined with the actual project, it can be seen that the parallel situation between the borehole and the center line of the pile is related to the quality of data acquisition, and should be paid attention to in the project.