Determining Pipeline Depth of Cover at River Crossings by Data Integration

Pete Chan, J. Wei
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Abstract

Having sufficient depth of cover ensures pipeline protection and is a regulatory requirement. Confirming the pipeline depth of cover on dry land is generally easy and produces accurate results. However, determining the pipeline depth of cover at a river crossing can be problematic because of accessibility difficulties and the increased measurement errors from aboveground surveys. The difficulty of determining the pipeline depth of cover at river crossings can be resolved by integrating both the aboveground survey data and the inline inspection data. By comparing both sets of data, errors from both above survey data and inline inspection data can be detected. This paper describes watercourse management, aboveground DOC surveys, and a spreadsheet based tool developed for both the quick verification of aboveground survey results, and the calculation of the true DOC at water crossings without needing to set new GPS tie-points on both banks of the crossing and running a new ILI.
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基于数据集成的渡口管道覆盖深度确定方法
有足够的覆盖深度确保管道的保护,是监管要求。在陆地上确定覆盖层的管道深度通常比较容易,结果也比较准确。然而,由于难以接近和地面测量误差增加,确定河流渡口的管道覆盖深度可能会有问题。将地面测量数据与在线检测数据相结合,可以解决河流渡口管道覆盖深度确定的困难。通过比较两组数据,可以检测出上述测量数据和内联检测数据的误差。本文介绍了水道管理、地上DOC调查和基于电子表格的工具,该工具既可以快速验证地上调查结果,又可以计算渡口的真实DOC,而无需在渡口两岸设置新的GPS连接点并运行新的ILI。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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