摘要
通过对鲁布革心墙堆石坝运行期竖直变形观测资料的分析，建立大坝观测变形量与环境量之间的数学模型，分离出坝体变形的蠕变分量。对邓肯－张Ｅ－Ｂ模型中的参数ｋ，ｋ_ｂ，ｎ，ｍ，Ｒ_ｆ，■_０进行不同的组合，运用有限单元法将沉降计算值与实测值（扣除蠕变分量后）拟合，从而反演出坝料在不同时期的参数。
A statistic model is established based on the prototype observation of Lubuge Dam during its operation. The main nonlinear parameters for the Ducan-Chang E-B model of the dam material for different periods are obtained by comparison of the deformation. calculated with FEM for a series of different combinations of the parameters in the E-B model. with the observed deformation (in which the creep deformation is disconnected). The result shows that the long-age strength of the dam material increases because its compaction rate is increased during operation. and in the end. the strength parameter will be stable.
出处
《大坝观测与土工测试》
2000年第2期18-22,共5页
Dam Observation and Geotechnical Tests
关键词
反演分析
堆石坝
长期强度
坝料
变形预测
creep deformation
back analysis
long-age strength
Ducan-Chang E-B model
