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节理的复杂性使得岩体工程具有许多安全隐患，研究复杂节理岩体在三向应力环境下的力学行为对岩体工程安全生产具有重要意义.为研究不同三向应力下不同节理空间产状节理岩体的力学特性与各向异性特征，开展了节理砂岩真三轴力学试验，对比分析节理砂岩试样强度、弹性模量等各向异性特征.结果表明：在相同的围压下，随着节理倾角和倾向的增加，砂岩试样的强度先减小后增大，在60°时最低，节理倾角和倾向对强度的影响呈“勺”形规律；节理倾角和倾向保持一定时，围压越大，节理砂岩的强度越高，围压大小对节理砂岩强度有增强作用，各向异性强度减弱，围压的增加对节理岩石强度的各向异性具有一定抑制作用.
Abstract：The complexity of joints poses numerous safety hazards in rock engineering, and studying the mechanical behavior of complex jointed rock under triaxial stress conditions is of great significance for the safe production of rock engineering.To investigate the mechanical properties and anisotropic characteristics of jointed sandstone with different spatial attitudes under different triaxial stresses, true triaxial mechanical experiments on jointed sandstone were conducted, and the anisotropic characteristics such as strength and elastic modulus of the jointed sandstone samples were compared and analyzed.The results indicate: Under the same confining pressure, as the joint dip angle and strike increase, the strength of the sandstone samples first decreases and then increases, reaching the lowest at 60°,and the influence of joint dip angle and strike on strength follows a spoon-shaped pattern; when the joint dip angle and strike are kept constant, the higher the confining pressure, the higher the strength of the jointed sandstone, and the magnitude of confining pressure has a strengthening effect on the strength of jointed sandstone, reducing anisotropic strength, and the increase in confining pressure has a certain inhibitory effect on the anisotropy of jointed rock strength.
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基本信息:
DOI：10.16112/j.cnki.53-1223/n.2025.04.521
中图分类号:TU45
引用信息:
[1]邱帅,李克钢,秦庆词等.贯通节理砂岩真三轴压缩下力学特性研究[J].昆明理工大学学报(自然科学版),2025,50(04):35-42.DOI:10.16112/j.cnki.53-1223/n.2025.04.521.
基金信息:
国家自然科学基金项目（52364005）