摘要
坝基岩体中的剪切带特别是软弱夹层会影响岩体抗滑稳定性,通过古贤水利枢纽工程剪切带室内外直剪试验对比,分析了剪切带剪切破坏机理。现场直剪强度受起伏差控制,室内中型直剪主要由预留剪切缝岩土体本身强度决定;在剪切带较厚处,现场沿强度最弱面破坏更能准确反映实际情况;对于同一性状剪切面,圆柱体取样和方块体取样方法对强度影响不大。给出了古贤水利枢纽工程不同剪切带类型的强度参数。
The dam foundation＇ s shear zone especially weak interlayer directly affects rock anti-sliding stability. By comparison of indoor and in-situ direct shear test, the paper researched shear failure mechanism of shear zone. In-situ direct shear strength is controlled by fluctuation difference, indoor shear is mainly composed by reserve strength in shear zone ; at thick location, the weakest intensity failure more accurately reflects the actual situation; for the same traits shear plane, cylinder sampling and box body sampling methods have little impact on the strength; for Guxian Hydraulic Engineering Works, strength parameters of different shear zone type are provided.
出处
《人民黄河》
CAS
北大核心
2013年第2期86-87,共2页
Yellow River
关键词
剪切带
直剪试验
古贤水利工程
shear zone
direct shear
Guxian Hydraulic Engineering Works
