榆林地区岩土体剪切波速与埋深的相关性分析

doi:10.12196/j.issn.1000-3274.2024.01.006

摘要/Abstract

摘要： 岩土剪切波速是地质工程、地震工程和工程勘察领域需要涉及到的重要参数之一。以榆林地区218个钻孔数据为研究对象, 定量研究了榆林地区Ⅱ类场地常见的6种土类的剪切波速和埋深的关系, 通过最小二乘法优化参数, 并以拟合优度、根均方误差与中值误差作为评价指标, 给出推荐的函数模型和适用范围, 并以两个工程场地实测钻孔为例对比了两个常用模型, 验证了本文模型的可靠性。结果显示: 研究区各类土的剪切波速和埋深都呈较为明显的正相关, 不同岩性的埋深和剪切波速的相关性规律应该具体问题具体分析; 经过对模型参数优化并对比三种模型评估指标, 可知用三次多项式表达更为合适。该研究成果有助于更好的理解岩土体剪切波速和埋深之间的关系, 为榆林地区工程项目建设提供参考。

关键词: 榆林地区, 岩土体, 剪切波速, 埋深, 函数模型

Abstract: Shear wave velocity of rock and soil is a crucial parameter in the fields of geological engineering, seismic engineering, and engineering exploration. In this study, we quantitatively investigate the relationship between shear wave velocity and burial depth for six common types of soil in Class Ⅱ sites in the Yulin area, using 218 borehole data as the research foundation. Parameters are optimized using the least squares method, and goodness of fit, root mean square error, and median error are employed as evaluation metrics. Based on these findings, we provide recommended functional models and their applicable ranges. To validate the reliability of our proposed model, we compare it with two commonly used models using borehole data from two engineering sites. The results demonstrate a significant positive correlation between shear wave velocity and burial depth for different soil types in the study area. The correlation patterns between burial depth and shear wave velocity vary for different rock types and should be analyzed on a case-by-case basis. After optimizing the model parameters and comparing three model evaluation metrics, we find that a third-degree polynomial expression is more suitable. This research contributes to a better understanding of the relationship between shear wave velocity and burial depth in rock and soil, offering valuable insights for engineering projects in the Yulin area.

Key words: Yulin area, Rocks and soils, Shear wave velocity, Burial depth, Function model

中图分类号:

P315.9

郑萌, 黄月民, 梁积伟, 何斯渊, 李旭东, 陈红卫, 苏博, 苏晓明, 谢超. 榆林地区岩土体剪切波速与埋深的相关性分析[J]. 地震, 2024, 44(1): 78-93.

ZHENG Meng, HUANG Yue-min, LIANG Ji-wei, HE Si-yuan, LI Xu-dong, CHEN Hong-wei, SU Bo, SU Xiao-ming, XIE Chao. Correlation Analysis of Shear Wave Velocity and Burial Depth in Rock and Soil in the Yulin Area[J]. EARTHQUAKE, 2024, 44(1): 78-93.

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