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邓肯模型关于轴向应变εα与侧向应变εγ成双曲线关系的假设目前已普遍受到怀疑．为此，笔者在静力学模型材料试验中找到了与实验所得的泊松比变化规律吻合很好的拟合曲线关系．用这样的拟合曲线关系进行土石坝坝体稳定分析，求得的应力水平等值线图应是较合理的．笔者还进行了一些对比研究，为探索坝体稳定分析时泊松比的取值提供了一些建议．
The assumption of the hyperbolic relationship between the axial strain εα and the lateral strain εγ of the Duncan model has generally been under suspicion. To this end, I found in the static model test materials and experimentally obtained Poisson’s ratio law of variation is well fitted curve relationship. The stability analysis of earth-rock dam using such fitting curve relationship, the stress level contour map obtained should be more reasonable. The author also carried out some comparative studies and provided some suggestions for exploring the value of Poisson’s ratio in the stability analysis of dam.