锚固裂隙岩体冻融损伤测试与表征参量研究综述

Overview of freeze-thaw damage measurement and characterization of anchored fractured rock mass

寒区冻融循环作用可能导致边坡锚固岩体发生崩塌、滑坡灾害,为深入认识裂隙季节性体积变化对锚固岩体产生的损伤效应,开展锚固岩体的冻融损伤测试与评价研究。通过文献调研综述了裂隙岩体及锚固岩体宏细观损伤测试与表征量研究进展,从破坏性测试与非破坏性测试两个方面系统总结了岩体冻融损伤测试技术特点及适用范围。简要论述了适用于锚固裂隙岩体的损伤测试方法,包括拉拔试验、模型试验等破坏性测试,以及CT、声发射、超声波等非破坏性测试,并指出需注意非破坏性测试时金属材料的特殊响应问题。对岩体冻融损伤特征与表征参量进行了分析,并对锚固岩体冻融损伤测试问题的研究趋势进行了展望。综述成果对锚固裂隙岩体冻融损伤分析与研究具有一定参考意义。

The freeze-thaw cycle in cold region may lead to rock collapse and landslide disasters.In order to deeply understand the damage effect of the seasonal fissure volume changed on the rock mass,it is of great significance to carry out the freeze-thaw damage test and evaluation of the rock mass.We reviewed the research progress of macroscopic and microscopic damage measurement and characterization of fractured rock mass and anchored rock mass.The technical characteristics and applicable scope of freeze-thaw damage testing for rock mass were systema-tically summarized from two aspects of destructive testing and non-destructive testing,and damage testing methods suitable for anchoring fissure rock mass were preliminarily explored.It was pointed out that destructive tests such as pull test and model test can be used to evaluate the freeze-thaw damage of rock mass.The special response of metal materials should be paid attention to when non-destructive tests such as CT,acoustic emission and ultrasonic were used to evaluate the freeze-thaw damage of rock mass.In addition,the characteristics and characterization parameter of freeze-thaw damage of rock mass were analyzed,and the development trend of freeze-thaw damage testing of anchored rock mass was forecasted.The summarized results can provide a reference for the analysis and research of freeze-thaw damage of anchored fractured rock mass.