针对土石围堰防渗墙应力分析中,结构模型参数不易获得的问题,将对防渗墙应力变形较敏感的几个参数表述为区间变量,基于响应面思想,通过正交试验和最小二乘法求出防渗墙的应力响应面函数,以近似替代实际仿真模型。实例研究表明,不同本构模型计算的防渗墙应力结果差异较大,且参数精度越高,计算结果越精确。研究结果为防渗墙的安全评价提供了依据。 Aiming at the problem that the parameters of structural model are not easy to obtain in the stress analysis of impervious wall of earth rock cofferdam, several parameters that are sensitive to the stress and deformation of the impermeable wall are expressed as interval variables. Based on the response surface theory and by orthogonal test and least square method The stress response surface function of the cut-off wall is obtained to approximate the actual simulation model. The case study shows that the stress-proofing wall stress results calculated by different constitutive models are quite different, and the higher the parameter accuracy, the more accurate the calculation results. The results provide the basis for the safety evaluation of cutoff wall.