摘要
为探讨冻融循环对花岗斑岩破裂面特征及其破坏机制的影响,采用单轴压缩试验与高精度蓝光三维测量技术,结合分形理论定量分析了花岗斑岩在自然状态、饱和状态和冻融循环状态下的破裂面三维形貌特征。结果表明,冻融循环显著降低了花岗斑岩的抗压强度和弹性模量,并增加了破裂面的分形维数;相较于其他2种状态,冻融循环岩石破裂面的微裂隙及孔隙占比最高,颗粒连续性差,结合力弱,从而导致破裂面呈现更加粗糙和不规则的特征;冻融循环增加了破裂过程中的能量耗散比例,3种状态下的分形维数与能量耗散比例呈正相关性。
This study examines the effects of freeze-thaw cycles on the fracture surface morphology and failure nisms mecha-of granite porphyry.Through uniaxial compression tests and high-resolution blue light 3D scanning technology combined with fractal theory,three-dimensional morphology of fracture surfaces under natural,saturated,and thaw freeze-conditions were quantitatively analyzed.The results show that freeze-thaw cycles significantly reduce the sive compres-strength and elastic modulus of granite porphyry while increasing the fractal dimension of fracture surfaces.The freeze-thaw conditions lead to the most extensive development of microcracks and pores compared to natural and saturated states,causing reduced particle continuity,weakened cohesion,and rougher,more irregular fracture surfaces.ally,Addition-the freeze-thaw cycles increase energy dissipation during fracturing,with a positive correlation observed between the fractal dimension and the energy dissipation ratio across all three states.
作者
胡宝文
刘畅
宿辉
南博文
赵辉绩
韩艳超
HU Bao-wen;LIU Chang;SU Hui;NAN Bo-wen;ZHAO Hui-ji;HAN Yan-chao(School of Water Conservancy and Hydroelectric Power,Hebei University of Engineering,Handan 056038,China;Key Laboratory of Intelligent Water Conservancy in Hebei Province,Handan 056038,China;Shandong GEO-Surveying&Mapping Institute,Jinan 250013,China)
出处
《水电能源科学》
北大核心
2025年第10期97-100,109,共5页
Water Resources and Power
基金
河北省自然科学基金项目(E2024402005)。
关键词
花岗斑岩
冻融循环
分形维数
能量耗散
断裂形貌
granite porphyry
freeze-thaw cycles
fractal dimension
energy dissipation
fracture morphology
