Research on Borehole Data Consistency and Stratum Reconstruction Methods in Geotechnical Investigation
岩土勘察钻孔数据一致性与地层重构方法研究

摘要

岩土勘察钻孔资料涵盖孔位坐标、孔口标高、钻孔深度等多类信息，数据一致性对地层界面识别与空间重构可靠 性起直接影响。以38个勘探点及工程勘察成果为基础，构建钻孔基础字段、竖向闭合关系和坐标异常校核流程，运用 层序约束与空间插值方法完成地层界面的重构。结果显示，报告钻探总进尺和明细孔深合计差值为 2.70m，差异率达 0.44%，水位闭合残差为0.00m，竖向字段关系保持稳定，个别坐标异常会显著放大孔位极差且影响插值权重，钻孔数 据一致性控制是提高地层重构可靠性的关键前置环节。

Abstract

Borehole data in geotechnical investigation cover various types of information, including borehole coordinates, collar elevation, and drilling depth. Data consistency has a direct impact on the reliability of stratum interface identification and spatial reconstruction. Based on 38 exploration points and engineering investigation results, this study constructs a verification process involving basic borehole fields, vertical closure relationships, and coordinate anomaly checks, and completes the reconstruction of stratum interfaces by using stratigraphic sequence constraints and spatial interpolation methods. The results show that the difference between the reported total drilling footage and the sum of detailed borehole depths is 2.70 m, with a discrepancy rate of 0.44%. The residual of groundwater-level closure is 0.00 m, and the relationships among vertical fields remain stable. Individual coordinate anomalies may significantly enlarge the range of borehole positions and affect interpolation weights. Therefore, consistency control of borehole data is a key prerequisite for improving the reliability of stratum reconstruction.