碾压混凝土坝施工层面变形分析模型

针对碾压混凝土坝施工层面对大坝变形产生显著影响的问题,深入研究了施工层面的变化性质及规律,提出了层面不同阶段变形的模拟方法,建立了施工层面有厚度和无厚度分析模型,提出的模型能反映层面的弹性变形、衰减蠕变、不可逆变形以及加速蠕变等变形状态.实例分析表明:所提出的碾压混凝土坝施工层面有厚度和无厚度分析模型能较客观地模拟大坝的结构变化形态,尤其是施工层面有厚度分析模型较完整地模拟了层面的渐变规律,其计算结果与原位监测成果吻合较好.同时,提出的方法和建立的分析模型可推广应用于常规混凝土坝,特别是坝基内断层和夹层等变形规律的分析.

Analytic Model of Deformation of Construction Interfaces of RCCD

The construction interfaces of RCCD have a distinct influence on the deformation of dams.The characters and rules on deformation of construction interfaces were studied.The methods simulating the interfaces' deformation at different stages were proposed.A thickness analytic model and a no-thickness analytic model of construction interfaces were built.These models can reflect the elastic deformation,the attenuation creep deformation,the irreversible creep deformation and the accelerating creep deformation of interfaces.The example shows that these proposed models can simulate the deformation of the dam structure objectively.Especially,the results of the thickness analytic model which simulates the gradual changing regularities of interfaces can tally with that of monitoring in situ preferably.The methods proposed and the analytic models can be generalized and applied to general concrete dams,especially to the analysis on deformation rules of fault and interlayer in dam base.