Dam seepage parameter inversion method

Abstract

The invention discloses a dam seepage parameter inversion method. The method comprises the following steps: step 1, extracting sample points from a value range of seepage parameters to be inverted byadopting a Latin hypercube sampling method; step 2, calculating a response value corresponding to each sample point through seepage numerical simulation, and constructing a training sample and a testsample; step 3, training each agent model by using the training sample; step 4, determining a weight coefficient of each agent model based on a DREAM algorithm, and constructing a set agent model through weighted summation; and step 5, adopting the set agent model constructed in the step 4 to replace a dam seepage numerical simulation model consuming calculation time, and acquiring seepage parameters to be inversed through calculation based on a Bayesian inversion method. The method accurately and efficiently acquires dam seepage parameters, and thus more reliable support and basis are provided for dam seepage behavior analysis.

Description

Technical field[0001]The invention belongs to the field of dam seepage behavior analysis in water conservancy and hydropower engineering, and specifically relates to a method for back analysis of dam seepage parameters.Background technique[0002]Seepage is an important factor affecting the safety and stability of dams[1], Dam seepage behavior analysis and research provide theoretical and technical support for ensuring the safety and stability of dam seepage. Accurately obtaining the seepage parameters of the rock and soil media is an important prerequisite for scientific analysis of dam seepage behavior. In actual engineering, seepage parameters are usually obtained according to indoor tests and in-situ tests. However, due to the complexity of dam engineering and the uncertainty of geological conditions, the obtained seepage parameters have a large deviation from the actual situation.[2]. Taking the variables that are easier to observe, such as water head or seepage flow, as known in...

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Problems solved by technology

[0005] Most of the current seepage parameter inversion methods ignore the uncertainty in the inversion process. Although the Bayesian inversion method can consider the uncertainty problem, the calculation efficiency is low, and the prediction performance of the single proxy model usually used Insufficient instability, the present invention proposes a dam seepage parameter inversion method, which can accurately and efficiently obtain dam seepage parameters, thereby providing more reliable support and basis for dam seepage performance analysis

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