东北水利水电2025，Vol.43Issue(7)：33-36,4.
盐冻作用下岩溶区引水隧洞软岩力学特性与机理研究
Study on soft rock mechanics and mechanism of diversion tunnel in karst area under salt freezing action
摘要
Abstract
This paper takes the soft rock material of a water diversion tunnel in the karst area of Jiangxi Province as the research object,conducts sulfate corrosion and freeze-thaw cycling treatment,evaluates the variation law of the mechanical behavior of the soft rock by using the uniaxial compressive strength test,and observes the microstructure of the soft rock in combination with the re sults of nuclear magnetic resonance and scanning electron microscopy.The research results show that under multiple salt freezing actions,the compressive strength and elastic modulus of soft rock gradually decline with the increase of salt freezing times.The T2 spectrum of soft rock can quantitatively reflect the changes of the pore structure of soft rock during the salt-freezing process.The strength and porosity have a good linear relationship,indicating that the weakening of the macroscopic mechanical properties of soft rock is closely related to the changes in its microstructure.The research results provide an important reference for the study of the environ mental corrosion effect on the performance of soft rock materials in tunnels in karst areas.关键词
软岩/盐冻/力学特性/矿物成分/微观结构/引水隧洞Key words
soft rock/salt freezing/mechanical properties/mineral composition/microstructure/diversion tunnel分类
建筑与水利引用本文复制引用
王粤,王飞..盐冻作用下岩溶区引水隧洞软岩力学特性与机理研究[J].东北水利水电,2025,43(7):33-36,4.基金项目
江西省水利推广应用项目(JXSLKJTG2024013) （JXSLKJTG2024013）
