采用三轴蠕变仪对宁木特水利枢纽工程黏土心墙的分散性土进行三轴固结排水试验，研究分散性土在不同初始条件下的蠕变变形规律，并获取蠕变模型及蠕变参数。试验结果表明，分散性土具有明显的非线性蠕变特征，蠕变过程可以分为瞬时弹塑性变形、衰减蠕变变形和稳定蠕变变形3个阶段；含水率、围压和偏应力水平对分散性土蠕变速率和蠕变量有显著的影响；应力-应变等时曲线具有明显的非线性特征。采用Singh-Mitchell蠕变模型和Mesri蠕变模型描述分散性土的蠕变特性，与试验数据对比表明，Mesri蠕变模型能够比较准确而方便地描述分散性土的蠕变特性，且模型具有参数少、适用性较强的特点。

The drained triaxial compression creep tests were conducted on the dispersive soil of Ningmute Hydraulic Project by using a stress triaxial creep meter to investigate the creep deformation law under different initial conditions and to develop a creep model and its parameters. Experimental results show that the dispersive soil is a typical creep material and its creep deformation characteristics are quite obvious. It experiences three creep stages which include instantaneous creep deformation, attenuation creep deformation and constant speed creep deformation. The data also indicate that the creep rate and creep magnitude of dispersive are significantly governed by the water content of soil, confining pressure and deviatoric stress level, and stress-strain curves exhibit obvious nonlinear. Mesri model and Singh-Mitchell model are employed to describe creep properties of dispersive soil. By comparing with experimental results, it is found that the creep properties of dispersive soil can be described more accurately and easily by Mesri model than Singh-Mitchell model. Moreover, Mesri model has the characteristic of less parameters and strong applicability.