摘要
红层软岩边坡岩体中软弱夹层发育且具有蠕变性,很多边坡岩体的失稳破坏都是沿软弱结构面的滑移失稳,软弱夹层剪切强度参数的选取是边坡工程勘察中的关键问题。通过2个典型红层软岩边坡工点软弱夹层样品室内剪切蠕变试验研究,表明红层软岩软弱夹层具有显著的蠕变特性,在边坡剪切强度参数选取中应考虑软弱夹层蠕变的影响。通过软弱夹层长期强度与短期强度试验资料分析,建议软弱夹层长期剪切强度可取短期剪切强度的75%。
Weak intercalation in redbed soft rock has the property of creep. Most of slope rock masses destabilize along the weak intercalation. So the selection of shear strength parameters is a key problem in the survey of slope. The shear creep experiments on samples with weak intercalation collected from two typical redbed soft rock slopes are performed. The results show that the soft intercalation is very significant in creep, which should be considered in the shear strength parameters. According to the analysis of long- and short-term shear strengths, it is suggested that the long-term shear strength is about 75% of short-term one.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2009年第A01期3176-3180,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
交通部西部交通建设科技项目(200231800026)
关键词
岩石力学
红层软岩
软弱夹层
剪切蠕变
长期剪切强度
rock mechanics
redbed soft rock
weak intercalation
shear creep
long-term shear strength
