先进的机器学习模型用于从奈和班加罗尔岩石样本的点负载强度指数预测不受限制的压力强度
Sowmya Kochukrishnan1, Premalatha Krishnamurthy2, Chintaluri Venkata Prasad3
1Department of Civil Engineering, Anna University, Chennai, Tamil Nadu, India. sowmya.civil@gmail.com.
Scientific reports
|October 21, 2025
概括
点负荷测试 (PLI) 准确地预测了岩石不受限制的压力 (UCS). 轴向PLI显示出比直径PLI (R2=0.991) 更强的相关性 (R2=0.996),神经网络和高斯过程回归模型表现最好.
科学领域:
- 地质技术工程 地质技术工程
- 岩石力学 岩石力学 岩石力学
- 机器学习应用 机器学习应用
背景情况:
- 精确预测岩石无界压力 (UCS) 对于工程设计至关重要.
- 点负荷指数 (PLI) 测试为估计岩石强度的传统方法提供了切实可行的替代方案.
- 机器学习 (ML) 模型可能会提高基于 PLI 的 UCS 预测的准确性.
研究的目的:
- 评估直径 (PLId) 和轴向 (PLIa) 点负荷测试在预测岩石UCS中的有效性.
- 实施和比较五种机器学习模型,以提高UCS预测准确度.
- 确定最可靠的预测模型,并评估特定岩石类型的PLI和UCS之间的相关性.
主要方法:
- 在Pallavaram和Panathur的岩石样本上进行直径和轴点负载测试.
- 应用了五种机器学习模型:线性回归,逐步线性回归,支持矢量机,高斯过程回归和神经网络,使用回归学习器应用程序.
- 使用平均绝对误差 (MAE),根平均平方误差 (RMSE) 和相关系数 (R2) 验证模型性能.
主要成果:
- 所有测试的机器学习模型在PLI和UCS的相关性方面表现良好.
- 与其他方法相比,神经网络和高斯过程回归模型表现出优越的预测能力.
- 对两个样本位置的轴向PLI测试显示出与UCS (R2=0.996) 的相关性比直径PLI测试 (R2=0.991) 更强.
结论:
- 点负荷指数 (PLI) 是预测岩石无限制压力 (UCS) 的可靠指标.
- 与直径测试相比,轴方向点负载测试提供了更准确的UCS预测.
- 先进的机器学习模型,特别是神经网络和高斯过程回归,显著提高了岩石强度参数的预测精度.
相关概念视频
Strength of Cement
926
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
926
Bonding and Strength of Aggregate
1.2K
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
1.2K
Non-destructive Tests for Concrete Strength
1.0K
The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
1.0K
Behavior of Concrete Under Compressive Load
954
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
As the concrete specimen fractures under...
954
Relation Between Tensile Strength and Compressive Strength of Concrete
1.0K
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the...
1.0K
Dynamic Modulus of Elasticity of Concrete
1.3K
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
1.3K
