摘要
对坝基存在软弱夹层的重力坝,控制其抗滑稳定性的主要因素是夹层的抗剪强度,如何使提供的抗剪强度参数既保证大坝安全又经济合理是地质和试验工作的关键。分析了马家岩水库坝基软弱夹层的物质组成、矿物成分、结构类型、成因、剪切应力-应变特征,论证了塑性破坏类型软弱夹层抗剪强度参数取值的原则,提出了本工程坝基软弱夹层抗剪强度的地质建议值。
For gravity dam with weak intercalated layer in foundation, the shear strength of the weak intercalated layers is the main factor in the control of the dam stability. It is the key point of geological and experimental work to ensure the shear strength to satisfy safety and economy of dam. The material composition, mineralogical composition and structure, genetic type and characteristics of shear stress and strain of weak intercalated layer in dam foundation of Majiayan reservoir are analyzed, the valuation rule of the shear strength of weak intercalated layer with plastic failure mode is discussed, and finally the recommended geological value of shear strength of weak intercalated layer in this project is proposed.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第22期3761-3764,共4页
Chinese Journal of Rock Mechanics and Engineering
关键词
水库工程
软弱夹层
成因
塑性破坏
抗剪强度
Foundations
Geotechnical engineering
Gravity dams
Reservoirs (water)
Shear strength
