大坝原型观测资料的综合分析法

Analysis of In-situ Obseved Data by Using Synthetic Analysis Method

论述了数学模型中的各因子呈密切相关时,用常规分析法将出现方程病态和难以分离各个分量等问题.提出用综合分析法分析大坝原型观测资料:结合大坝结构性态,综合应用正分析,反演分析和三维有限元数值计算等方法,从观测值中独立分离各个分量;以时效分量的变化规律及数值大小来评价大坝的工作性态.作为实例,分析了某重力拱坝在蓄水初期的变形观测资料,评价了该坝的实际运行状态.

First discussed are the problems in which the equations are in ill-condition and the components are difficult to separate but the components in mathematic models are closely related. Then, a synthetic analysis method for the in-situ observed data of dams is proposed. Its key points are as follows. The straight analysis, inverse analysis and 3-D FE methods are synthetically used to separate each component from observed values, and the working behaviour of the dam is judged by using the variation law of time effect component. Finally, the method is applied to analyse the observed data of a gravity arch dam whose observed values are changing in the initial stage of water impoundment, and the result obtained conforms to the realistic working state of the dam.