300m级超高土质心墙坝的长期变形特性研究

Effect of Creep Characteristic of 300m Level High Rockfill Dam with Core Wall

目前国内即将列项修建的300 m级高土质心墙坝,在高应力状态下,坝料的长期变形特性对坝体的沉降影响大。为研究300 m级超高土质心墙坝的长期变形特性,采用长江科学院九参数幂级数流变本构模型及其试验参数,对300 m级高土质心墙坝填筑过程及流变过程进行数值模拟。计算得到的流变位移约为47 cm左右,考虑了流变后的变形会更真实反映实际坝体的运行状况。

At present some 300m level high rockfill dam with core wall is to be built in our country. Under the high stress status, the dam materials are made of gravelly soil whose long-term deformation characteristic can affect rockfill dam with core wall greatly. In order to study the effect of creep characteristic of gravelly soil core wall on the rockfill dam with core wall, the nine parameter power series constitutive model and its test parameters are adopted, and the filling and creep process of 300m level high earth core dam are simulated by FEM. The creep displacement is about 47 cm. When considering creep, displacement would reflect the actual operation situation of dam.