Data-driven framework for predicting ground temperature during ground freezing of a silty deposit

IF 2.5 3区 工程技术 Q2 ENGINEERING, CIVIL
K. Pham, Sangyeong Park, Hangseok Choi, Jongmuk Won
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引用次数: 4

Abstract

Predicting the frozen zone near the freezing pipe in artificial ground freezing (AGF) is critical in estimating the efficiency of the AGF technique. However, the complexity and uncertainty of many factors affecting the ground temperature cause difficulty in developing a reliable physical model for predicting the ground temperature. This study proposed a data-driven framework to accurately predict the ground temperature during the operation of AGF. Random forest (RF) and extreme gradient boosting (XGB) techniques were employed to develop the prediction model using the dataset of a field experiment in the silty deposit. The developed ensemble models showed relatively good performance (R2 > 0.96), yet the XGB model showed higher accuracy than the RF model. In addition, the evaluated mutual information and importance score revealed that the environmental attributes (ambient temperature, surface temperature, humidity, and wind speed) can be critical in predicting ground temperature during the AFG operation. The prediction models presented in this study can be utilized in evaluating freezing efficiency at the range of geotechnical and environmental attributes.
粉质沉积物冻结期间地温预测的数据驱动框架
人工冻结管冻结区预测是评估人工冻结技术效率的关键。然而,影响地温的诸多因素的复杂性和不确定性给建立可靠的地温预测物理模型带来了困难。本研究提出了一个数据驱动的框架,以准确预测AGF运行过程中的地温。采用随机森林(RF)和极端梯度增强(XGB)技术,建立了粉质沉积物野外试验数据的预测模型。所建立的集成模型表现出较好的性能(R2 > 0.96),但XGB模型的精度高于RF模型。此外,评估的互信息和重要性得分表明,环境属性(环境温度、地表温度、湿度和风速)在预测AFG运行期间的地温方面是至关重要的。该预测模型可用于岩土和环境属性范围内的冻结效率评价。
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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来源期刊
Geomechanics and Engineering
Geomechanics and Engineering ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
5.20
自引率
25.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Geomechanics and Engineering aims at opening an easy access to the valuable source of information and providing an excellent publication channel for the global community of researchers in the geomechanics and its applications. Typical subjects covered by the journal include: - Analytical, computational, and experimental multiscale and interaction mechanics- Computational and Theoretical Geomechnics- Foundations- Tunneling- Earth Structures- Site Characterization- Soil-Structure Interactions
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