堆石料湿化变形特性试验研究

通过室内大三轴单线法对堆石料的湿化变形进行了试验研究,探讨了在不同密度、不同围压、不同应力水平状态分别对堆石料进行浸水后变形特性的规律性研究,根据建议的湿化模型整理了计算参数。试验结果表明:随着围压增大、浸水应力水平提高,堆石料的湿化轴向应变变大,在围压和应力水平增加超过某一范围后,堆石料的湿化轴向应变明显增大。湿化轴向体变随围压浸水应力水平的变化不是很明显。随着堆石料密度的提高,堆石料的湿化变形量产生一定量的减少。

Experimental Study on Slaking Deformation Properties of Rockfill

The experimental study on the slaking deformation properties of rockfill is performed by use of the large triaxial single line method.The deformation rules of rockfill after soaking are discussed under different densities,confining pressures and stress levels.The parameters for calculation are summarized according to the suggested slaking model.The test results indicate that with the increase of confining pressure,the soaking stress level increases,and the slaking axial strain of the rockfill also increases.When the confining pressure and the stress level surpass a certain value,the axial strain of the rockfill obviously increases.However,the axial volumetric strain of the rockfill owing to the confining pressure and stress level is not evident. With the increase of density of the rockfill,the slaking deformation of the rockfill exhibits a certain decrease.