CAJ | 학술논문

按水电行业HC法将丹巴水电站片理状岩体质量分类定为IV类，围岩稳定性差。通过对丹巴石英云母片岩的宏细观力学特性试验，提出石英云母片岩的“似块状”岩体结构，对岩体质量分类进行合理修正。通过单轴压缩试验、不同围压下真三轴试验表明，高应力作用下片岩的各向异性不明显，并通过薄片的细观试验提出丹巴石英云母片岩并非“层状结构”岩体结构，而是“似块状”结构。在此基础上，对丹巴水电站引水隧洞岩体质量分类进行了修正，隧洞围岩以III类为主。最后，通过现场回弹测试、声波检测和变形分析表明，围岩自稳能力强，修正后的分类标准具有良好的适用性。因此，研究不同应力环境下特殊岩石的力学特征对于岩体质量分类具有重要意义，可为同类水电工程围岩分类提供借鉴。
안수전행업HC법장단파수전참편리상암체질량분류정위IV류，위암은정성차。통과대단파석영운모편암적굉세관역학특성시험，제출석영운모편암적“사괴상”암체결구，대암체질량분류진행합리수정。통과단축압축시험、불동위압하진삼축시험표명，고응력작용하편암적각향이성불명현，병통과박편적세관시험제출단파석영운모편암병비“층상결구”암체결구，이시“사괴상”결구。재차기출상，대단파수전참인수수동암체질량분류진행료수정，수동위암이III류위주。최후，통과현장회탄측시、성파검측화변형분석표명，위암자은능력강，수정후적분류표준구유량호적괄용성。인차，연구불동응력배경하특수암석적역학특정대우암체질량분류구유중요의의，가위동류수전공정위암분류제공차감。
According to HC method applied to hydropower field,quality level of Danba hydropower station schistosity-like rock is classified as IV and the stability of surrounding rock is poor. The massive-like rock structure of quartz mica schist has been proposed by the macro-micro mechanical properties test of Danba quartz mica schist;and rock mass classification method has been modified reasonably. Uniaxial compression test and true triaxial tests under different confining pressures show that the anisotropy of schistosity is not obvious under the high stress. By casting thin meso-test,we find that Danba quartz mica schist is not rock mass structure of“layered structure”,but“massive-like”structure. On this basis,rock mass quality classification of the water diversion tunnel in Danba hydropower station has been modified to classification III. Finally , the self-stability of surrounding rock is favorable through on-site testing,acoustic detection and deformation analysis. And the revised criterion for classification has good applicability. Therefore,it is of great significance for rock mass classification to research rock mechanical characteristics under different stress environments,which can provide a reference for rock classification of similar hydropower engineering.