岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2014年
4期
699-706
,共8页
岩石力学%岩体基本质量%岩体质量指标BQ%工程岩体分级%边坡工程岩体分级%边坡岩体自稳能力
巖石力學%巖體基本質量%巖體質量指標BQ%工程巖體分級%邊坡工程巖體分級%邊坡巖體自穩能力
암석역학%암체기본질량%암체질량지표BQ%공정암체분급%변파공정암체분급%변파암체자은능력
rock mechanics%rock mass basic quality%rock mass quality index BQ%engineering rock mass classification%engineering rock mass classification for rock slope%stand-up time of rock slope
对于线路工程上具有普遍性的岩质边坡，因数量多，范围广，工程勘察深度相对较浅。依据规范的测试和试验，建立一种基础性岩体质量评价方法，实现边坡工程岩体分级，并根据行业要求与经验提出支护措施，对提高岩质边坡工程设计与施工的科学性无疑具有重要的意义。针对现有的《工程岩体分级标准》(GB50218-94)没有涉及边坡工程岩体分级，在深入研究和系统消化边坡工程岩体分级成果基础上，提出基于岩体质量指标BQ的岩质边坡工程岩体分级方法(简称 BQ-RSlope 方法)。该方法在岩体基本质量指标基础上，考虑控制边坡稳定性的主要结构面类型与延伸性、结构面产状与坡面间关系以及边坡内地下水发育程度等影响因素，对岩体基本质量指标进行修正，由此确定边坡工程岩体级别，并给出各级别边坡工程岩体自稳能力的评价。结合4个边坡工程10个坡段的应用性验证，表明依据文中方法获得的各边坡坡段的岩体质量分级以及该基于质量指标对边坡稳定性的评价结果与工程实际总体相符，提出的依据BQ的岩质边坡工程岩体分级方法是合适的。
對于線路工程上具有普遍性的巖質邊坡，因數量多，範圍廣，工程勘察深度相對較淺。依據規範的測試和試驗，建立一種基礎性巖體質量評價方法，實現邊坡工程巖體分級，併根據行業要求與經驗提齣支護措施，對提高巖質邊坡工程設計與施工的科學性無疑具有重要的意義。針對現有的《工程巖體分級標準》(GB50218-94)沒有涉及邊坡工程巖體分級，在深入研究和繫統消化邊坡工程巖體分級成果基礎上，提齣基于巖體質量指標BQ的巖質邊坡工程巖體分級方法(簡稱 BQ-RSlope 方法)。該方法在巖體基本質量指標基礎上，攷慮控製邊坡穩定性的主要結構麵類型與延伸性、結構麵產狀與坡麵間關繫以及邊坡內地下水髮育程度等影響因素，對巖體基本質量指標進行脩正，由此確定邊坡工程巖體級彆，併給齣各級彆邊坡工程巖體自穩能力的評價。結閤4箇邊坡工程10箇坡段的應用性驗證，錶明依據文中方法穫得的各邊坡坡段的巖體質量分級以及該基于質量指標對邊坡穩定性的評價結果與工程實際總體相符，提齣的依據BQ的巖質邊坡工程巖體分級方法是閤適的。
대우선로공정상구유보편성적암질변파，인수량다，범위엄，공정감찰심도상대교천。의거규범적측시화시험，건립일충기출성암체질량평개방법，실현변파공정암체분급，병근거행업요구여경험제출지호조시，대제고암질변파공정설계여시공적과학성무의구유중요적의의。침대현유적《공정암체분급표준》(GB50218-94)몰유섭급변파공정암체분급，재심입연구화계통소화변파공정암체분급성과기출상，제출기우암체질량지표BQ적암질변파공정암체분급방법(간칭 BQ-RSlope 방법)。해방법재암체기본질량지표기출상，고필공제변파은정성적주요결구면류형여연신성、결구면산상여파면간관계이급변파내지하수발육정도등영향인소，대암체기본질량지표진행수정，유차학정변파공정암체급별，병급출각급별변파공정암체자은능력적평개。결합4개변파공정10개파단적응용성험증，표명의거문중방법획득적각변파파단적암체질량분급이급해기우질량지표대변파은정성적평개결과여공정실제총체상부，제출적의거BQ적암질변파공정암체분급방법시합괄적。
The engineering classification in rock slopes is not included in the current standard of engineering classification of rock masses(GB50218-94). This paper presents the engineering classification method for rock slopes(BQ-R Slope) based on the quality index of rock mass BQ. In this method,several modified factors are employed as to correct rock mass basic quality,and the engineering rock mass classifications for rock slopes are determined by the modified rock mass quality , and the evaluation for stand-up time of rock slope in correspondence with each class of rock mass is further proposed. The employed factors consist of the type and the persistence of major structural planes,the relationship between orientations of structural planes in rock mass and rock slope surface and the groundwater conditions in rock slope. The presented method is verified through applications to four rock slope projects and ten slope sections in total. It is found that the engineering classification and the corresponding evaluation results of each slope section with the method proposed are generally in good agreement with the practical situation. This indicates that the presented method for engineering rock mass classification of rock slopes based on BQ index is appropriate.
