摘要
利用VJ非饱和三轴仪对砂砾石料进行了各向等压和剪切状态下浸水变形特性试验研究,并对不同应力状态下浸水变形过程中体应变和偏应变增量进行统计分析。假定体积应变增量在试样各向同性和等压固结条件下可分解成两部分,一部分是由于围压σ3引起的,另一部分是由于偏应力引起的;偏应变仅由偏应力引起的。在此假定的基础上建议了一个浸水体应变增量和偏应变增量与应力水平和围压之间的经验表达式以及相应的参数整理方法。
The VJ unsaturated triaxial apparatus is used for soaking tests. The tests are performed under the isotropic compres- sion and triaxial compression conditions with soaking deformation occurred. The volumetric and deviatoric strain increments are analyzed during soaking deformation under various stress states. It is assumed that the volumetric strain increment could be de- composed into two parts, i.e., one part from confining pressure a3 and the other from deviator stress; and the deviatoric strain is only induced by the deviator stress. Based on this assumption, an empirical formula is proposed for the relationship between the volumetric and deviatoric strain increments and the stress levels and confining pressure, and the corresponding method is also given for parameter determination.
出处
《水利与建筑工程学报》
2010年第6期96-99,共4页
Journal of Water Resources and Architectural Engineering
关键词
砂砾料
浸水变形
试验研究
gravel sand
wetting deformation
test study
