Abstract: For Louzhuangzi clay core dam, Duncan-Zhang hyperbolic E-B nonlinear material model is used to calculate the stress-strain. The calculation results show that the maximum vertical displacement is less than 1.0% of the dam height during both construction and operation which occurs at slightly lower than the 1/2 height of core wall, and there is no stress damage zone in the dam. No hydraulic fracturing damage would occur to the clay core wall during operation, and the stress and deformation of the cut-off wall is satisfactory. The analysis results exhibit that the settlement of dam crest meets the requirements of the design code for embankment dams. The calculation results of dam stress-strain are in accordance with the deformation law of embankment dams, a good safety factor is obtained for the structure, and the dam section design is reasonable and feasible.

Key words: clay core dam, cut-off wall, Duncan-Zhang model, stress-strain, Louzhuangzi reservoir

摘要： 针对楼庄子水库工程黏土心墙坝，采用Autobank软件中的邓肯-张双曲线E-B非线性材料模型对其进行应力应变计算分析。计算结果表明：大坝施工期、运行期的最大竖向位移均小于坝高的1.0%，发生在1/2心墙高度靠下位置，坝体内无应力破坏区，运行期黏土心墙不会产生水力劈裂破坏，混凝土防渗墙满足应力变形要求。分析结果证明：坝顶沉降量满足土石坝设计规范要求。坝体应力和应变计算结果与土石坝坝体变形规律一致，结构具有一定的安全系数，坝体剖面设计合理可行。计算分析结果可为同类工程设计应用提供参考。

关键词: 黏土心墙坝, 防渗墙, 邓肯-张模型, 应力应变, 楼庄子水库