摘要
堆石体变形控制与面板防裂是建设300m级超高混凝土面板堆石坝的关键难题,合理地选定坝体分区和筑坝材料是解决问题的主要措施之一。通过有限元数值仿真计算进行了镶嵌面板坝高模量区优化设计研究,探讨了高模量区对坝体及面板应力变形的影响。计算结果表明,当高模量区起始高程为最大坝高的23%,同时高度为最大坝高的38%时,计算结果较不设高模量区,坝体沉降和水平位移分别减小15.85%和11.68%,面板挠度和顺坡向压应力分别减小21.15%和20.97%。研究成果可为超高面板堆石坝的设计及建设提供理论依据。
The rockfill deformation control and the slab crack prevention are the key problems to the construction of 300 m super-high Concrete Faced Rockfill Dam(CFRD), and the main measures to solve the problems are to design dam zoning and select dam materials reasonably. In this paper, a finite element model of Inlaid Concrete Faced Rockfill Dam is built to analyze the impact of the high modulus zone on the deformation of dam and slab.Results obtained show that, comparing with the result without the high modulus zone, when the initial position of high modulus zone is set to take 23% of dam height and the height of high modulus zone is 38% of dam height,the vertical displacement and the horizontal displacement of rockfill are reduced by 15.85% and 11.68% , the deflection and the along slope stress of slab are reduced by 21.15% and 20.97% . The results may provide theoretical basis for the design and construction of super-high CFRD.
出处
《应用力学学报》
CAS
CSCD
北大核心
2018年第2期358-364,共7页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(51309190
51579207)
陕西省科技统筹创新工程(2013KTZB03-01-01)
关键词
镶嵌面板坝
堆石体变形
高模量区
起始高程
应力变形
inlaid concrete faced rockfill dam
deformation of rockfill
high modulus zone
initial elevation
stress deformation
