人民珠江2025，Vol.46Issue(6)：107-113,7.DOI:10.3969/j.issn.1001-9235.2025.06.012
基于点荷载的砂岩单轴抗压和抗拉强度估算
Estimation of Uniaxial Compressive Strength and Tensile Strength of Sandstone Based on Point Load
摘要
Abstract
In rock mechanics and engineering practice,accurate and rapid evaluation of uniaxial compressive strength and tensile strength of rock is important for engineering design and construction safety.Traditional test methods are time-consuming and laborious,and the method of determining uniaxial compressive strength and tensile strength of rock by point load strength index is simple and fast.In this paper,the point load test,uniaxial compressive test,and Brazilian splitting test under dry conditions were carried out based on 11 different types of sandstone,and the relationship of the point load strength with compressive strength and tensile strength was established by different fitting methods.The results show that the point load strength of sandstone has a significant correlation with compressive strength and tensile strength,and the variation coefficients of the two point load strengths have little difference,which can be used as the index for calculating the point load strength.Three different types of transformation relationships can be used to fit the point load and uniaxial compressive strength,including non-0 intercept linear relationship,0 intercept linear relationship,and power function.The linear fitting method is simple to calculate,and the correlation coefficient of linear fitting with 0 intercept is higher than that of linear fitting with non-0 intercept.Both the power function fitting formula and the 0 intercept fitting formula can be used to estimate the uniaxial compressive strength in practical engineering.For the tensile strength,it is also advantageous to use the 0 intercept linear formula for estimation.关键词
砂岩/试验研究/点荷载强度/线性拟合/幂函数拟合Key words
sandstone/experimental research/point load strength/linear fitting/power function fitting分类
建筑与水利引用本文复制引用
刘勇志,方晴瑶,张坤,姚华彦,刘武,刘广..基于点荷载的砂岩单轴抗压和抗拉强度估算[J].人民珠江,2025,46(6):107-113,7.基金项目
安徽省自然科学基金项目(2208085ME153) （2208085ME153）
