Model for quality classification of dam foundation rock mass based on Gaussian function weighted KNN algorithm and its application

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2024-11-28 DOI:10.1007/s10064-024-03993-3

Xian-biao Wang, Zheng-kun Feng, Hua-chen Wang, Wei-ya Xu, Sheng-lin Wang

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Abstract

The geological conditions in the dam area of Baihetan Hydropower Station are very complex, with columnar joints accounting for up to 39.9% of the base area. None of the existing methodologies for rock mass classification are fully suitable for the purposes of quality classification of columnar jointed basalt rock masses. This article addresses the challenges in evaluating and classifying the quality of the columnar jointed basalt rock mass at the dam foundation of the Baihetan Hydropower Station on the Jinsha River. Considering the engineering geological conditions, rock mass characteristics, and environmental context of the Baihetan dam area, evaluation indicators were selected for engineering rock mass quality classification. It also introduces a new rock mass classification model that combines the Gaussian function with the K-nearest neighbor (KNN) classification algorithm. Different weight coefficients were assigned based on the similarity of the samples. Thus, the proposed model was used for the evaluation and classification of the rock mass at the dam foundation in the key area. Ultimately, a new classification tool is proposed for assessing engineering properties of the rock mass at Baihetan dam foundation, providing a viable solution for quality classification in this particular area.

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基于高斯函数加权 KNN 算法的坝基岩体质量分类模型及其应用

白鹤滩水电站坝区地质条件十分复杂，柱状节理占坝基面积高达 39.9%。现有的岩体分类方法都不完全适用于柱状节理玄武岩岩体的质量分类。本文探讨了金沙江白鹤滩水电站坝基柱状节理玄武岩岩体质量评价与分类的难题。考虑到白鹤滩坝区的工程地质条件、岩体特征和环境背景，选取了工程岩体质量分类的评价指标。研究还引入了一种新的岩体分类模型，该模型结合了高斯函数和 K-nearest neighbor（KNN）分类算法。根据样本的相似性分配不同的权重系数。因此，所提出的模型被用于关键区域坝基岩体的评估和分类。最终，为评估白鹤滩坝基岩体的工程特性提出了一种新的分类工具，为这一特定区域的岩体质量分类提供了可行的解决方案。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.