CAJ | 학술논문

三峡库区30 m 消落带的岩质岸坡是一个脆弱敏感地带，其岸坡岩体质量及其劣化规律日益成为人们研究的重点。选取三峡库区消落带巴东段某典型岸坡的紫红色粉砂岩为研究对象，通过现场钻探取芯、室内试样加工和“烘干－饱水”循环试验手段，对红层粉砂岩试样进行了单轴压缩和耐崩解试验研究。试验成果表明：研究区粉砂岩属于较坚硬岩，其单轴压缩强度随干湿循环次数增加而降低，经过20次干湿循环后，粉砂岩强度软化呈较软岩特征；粉砂岩具有高耐崩解性，耐崩解性指数 Id 与循环次数 N 呈对数关系，Id 随 N 的增加而降低，Id 下降速率随 N的增加呈放缓趋势发展；相同循环次数条件下，高程越高的粉砂岩试样其 Id 越低。试验研究成果对三峡库区消落带岸坡岩体的劣化机理和岸坡稳定性分析等具有一定的参考价值。
삼협고구30 m 소락대적암질안파시일개취약민감지대，기안파암체질량급기열화규률일익성위인문연구적중점。선취삼협고구소락대파동단모전형안파적자홍색분사암위연구대상，통과현장찬탐취심、실내시양가공화“홍간－포수”순배시험수단，대홍층분사암시양진행료단축압축화내붕해시험연구。시험성과표명：연구구분사암속우교견경암，기단축압축강도수간습순배차수증가이강저，경과20차간습순배후，분사암강도연화정교연암특정；분사암구유고내붕해성，내붕해성지수 Id 여순배차수 N 정대수관계，Id 수 N 적증가이강저，Id 하강속솔수 N적증가정방완추세발전；상동순배차수조건하，고정월고적분사암시양기 Id 월저。시험연구성과대삼협고구소락대안파암체적열화궤리화안파은정성분석등구유일정적삼고개치。
As the hydro-fluctuation belt of 30 meters high in the Three Gorges Reservoir area becomes fragile and sensitive,the bank slope’s rock mass quality and its deterioration rules are increasingly becoming a research focus. In this paper,a typical siltstone rock slope in Badong segment of the Three Gorges Reservoir area was selected as a research object.Uniaxial compression test and slake durability test on siltstone samples were carried out by means of drilling in-site,in-door machining and wetting and drying cycles.The test results suggest that siltstones in the research area belong to hard rock,and its uniaxial compressive strength reduces along with the increase of cyclic number.However after 20 cycles of wetting and drying,the strength of siltstone weakens and displays the character-istics of soft rock.Moreover,the siltstone has high slake durability,and the slake durability index (Id )is in log-arithm function relationship with the wet-dry cycle number (N),which means that Id reduces with the increase of N,and the decrease of Id gradually slows down along with N increasing.Meanwhile,in the presence of the same cy-clic number,the higher elevation siltstone samples come from,the lower Id value they have.These research results could be reference for obtaining the deterioration rules of rock mass and rock slope stability analysis in the hydro-fluctuation belt of Three Gorges Reservoir area.