关于允楞水库渗流反演结果适定性解的探讨

渗流问题反演结果往往不是唯一的。结合云南允楞水库实际工程，探讨了反演结果不唯一的原因，并与数值优化方法结合，将反问题转为正问题求解。具体方法为:首先，将坝体渗流计算域分为若干子域，并认为在子域内渗透系数为常数；其次，以钻孔原位压水试验成果为渗流计算初值选取提供依据；最后用三维渗流有限元计算得到的各测孔水位，与实测值进行最优拟合得到反演结果。计算结果表明，该方法简便易行，计算结果精确可靠，可供同类工程的渗流反演分析参考。

Discussion on posedness solution of seepage inversion results of Yunleng Reservoir

The inversion results of seepage problems are usually not unique.Combing with the Yunleng Reservoir in Yunnan Province,we discuss the causes of un-uniqueness.By integrating it with numerical optimal method,we transfer the inverse problem to forward problem.First,the calculation domain of dam seepage is divided into several sub-domains,in which the permeability coefficient is assumed to be a constant.Then the results of in-situ water pressure tests provide basis for determination of seepage initial value.By optimally fitting the measured values with observation hole water level calculated by 3D FEM,we obtain the inversion results.The applicability and accuracy of the presented method is proved by the calculation samples.