摘要
影响预应力锚索锚固效果的因素多而复杂,并且各因素之间又相互影响。锚固力损失与岩土体性质密切相关,通过理论分析、试验研究、数值模拟等方法,研究岩土体的蠕变变形和压缩变形对锚固力损失的影响机理,对坚硬岩体、软弱岩体、破碎岩体以及土体所造成的预应力锚索锚固力损失规律进行研究,研究表明:岩土体性质不同,引起的预应力锚索锚固力损失也不相同;岩土体质量越好,在相同初始锚固力条件下其锚固力损失就越小。该研究成果可指导锚固工程的设计、施工和运行管理,有利于提高锚固工程的经济效益和社会效益。
There are many factors affecting anchoring effects of prestressed anchor cable. These factors are compli cate and interactive. The anchoring force loss has a deep relation with properties of rock and soil. With theoretical a nalysis, experimental study and numerical simulation, this paper examines the influence mechanism of rock and soil creep formation and compression formation on anchoring force loss and anchoring force loss laws of prestressed anchor cable caused by solid rock, weak rock, broken rock and soil. The results show that the properties of rock and soil mass cause the difference of anchoring force loss rate. In addition, there is less loss rate if rock and soil mass is in good quality on the condition of the same initial anchoring force. This research result can be used to guide the de sign, construction and management of anchoring projects and improve economic and social benefits of the whole prac tice.
出处
《工程地质学报》
CSCD
北大核心
2012年第5期849-854,共6页
Journal of Engineering Geology
基金
岩土力学与工程国家重点实验室资助课题(2012003)
国家自然科学基金(51174128)
山东省高等学校科技计划项目(J12LH03)
山东省高等学校优秀青年教师国内访问学者经费资助(QDN21)
关键词
岩土体性质
锚固力损失
规律
预应力锚索
Pre-stressed anchor cable, Property of rock and soil mass, Anchoring force loss, Law
