300m级超高面板堆石坝变形规律的研究

采用三维有限元数值分析方法研究了300m级超高混凝土面板堆石坝的变形规律。指出坝体分区、筑坝材料特性特别是流变特性是影响超高面板堆石坝变形性状的主要因素,要重视超高面板堆石坝上游部分坝体变形的鼓肚现象。建议了合理选择筑坝材料,适当提高下游堆石区填筑标准、全断面均衡填筑、上部1/3左右坝体采用变形模量较高的坝料,待坝体变形基本趋于稳定才浇筑面板以及考虑设置面板永久水平缝等工程措施来改善超高面板堆石坝的应力变形性状。

Deformation behavior of 300m high-concrete face rockfill dams

Studies on deformation behavior of 300 m high-concrete face rockfill dams are conducted using three-dimensional finite element numeral analysis method. Dam zoning and properties of materials for rockfill dams especially the rockfill creep are the main factors having an effect on the deformation behavior of super-high concrete face rockfill dams . The bulging pattern deformation of upstream part of dam body for super-high CFRD should be paid attention to. Some measures are put forward, including testing and selecting embankment materials reasonably, modification of placement criteria for downstream part of dam, balanced placement of the whole dam section placing, good embankment materials with high deformation modulus at top part of 1/3 dam height, pouring of concrete of face slab after getting stable basically of dam deformation and setting of horizontal joint of face slab in order to improve the stress-deformation behavior of super-high CFRD.