辽宁工程技术大学学报（自然科学版）2023，Vol.42Issue(6)：649-655,7.DOI:10.11956/j.issn.1008-0562.2023.06.002
水-岩相互作用下华南红层软岩力学特性
Mechanical properties of red-bed soft rocks in South China under water-rock interaction
摘要
Abstract
In order to study the water-rock interaction of red-bed soft rock,triaxial compression tests of red-bed soft rock with different water content were carried out,the effects of water content on mechanical properties,failure forms,microstructure and damage mechanism were analyzed,and the statistical damage constitutive model of red-bed soft rock with water content was constructed.The results show that the peak strain increases linearly with the increase of water content,and the peak strength and elastic modulus decrease linearly and exponentially respectively.Water content has obvious influence on the failure mode of red-bed soft rock.When the water content is low,the failure mode is shear failure.With the increase of water content,the failure mode changes to shear-tension composite failure.Under the water-rock interaction,the pore particles of the soft rocks in the red-bed of South China are adsorbed to each other and form a sheet structure.In the saturated state,the lamellar and scaly structures further increase,and the overall structure becomes more loose and fragmented.Considering the water-rock interaction,the damage correction coefficient is introduced to improve the constitutive model.The calculated results of the improved statistical damage constitutive model are consistent with the experimental results,which can better describe the influence of water-rock interaction on the mechanical properties of red layer soft rock.关键词
红层软岩/水-岩相互作用/力学特性/损伤/本构模型Key words
red-bed soft rock/water-rock interaction/mechanical properties/damage/constitutive model分类
建筑与水利引用本文复制引用
张树光,郭家昊,云霄,杨珏峰,李言墨..水-岩相互作用下华南红层软岩力学特性[J].辽宁工程技术大学学报（自然科学版）,2023,42(6):649-655,7.基金项目
国家自然科学基金项目(42067041) （42067041）
