摘要
针对目前在进行三轴CD试验时对土体固结稳定的判断没有统一标准的问题,利用试验手段,选用工程中常见的粘性土通过GDS三轴试验系统进行了三轴CD试验,试验过程中分别采集土样在不同荷载下的孔压和位移数据,并分析其随时间的变化规律,进而对实现三轴试验稳定控制的孔压、时间、位移等3种判断标准进行了讨论,在总结3种判断标准优缺点的基础上,提出了相对位移控制标准,即根据某级荷载下某段时间内的位移量对此级荷载下总位移量的贡献程度来决定试验的进度,该方法相对其它稳定判断标准更具科学性。
Currently, there is no normative method to judge the stabilization of consolidation deformation for consolidation drained tri-axial test. Therefore, the CD tri-axial test with clay has been made by the GDS, the data of pore pressure and deformation of soil sample has been collected during the experiment. Through analyzing the experimental data, the existing standards of stabilization such as pore pressure control; deformation control and time control have been discussed in the paper. And the relative deformation standard has been proposed. It points out that the stabilization of consolidation deformation lies on the proportion of deformation of certain time to total deformation for certain pressure. Comparing with other standards, it＇s a more scientific method.
出处
《工程勘察》
CSCD
北大核心
2008年第2期1-3,7,共4页
Geotechnical Investigation & Surveying
基金
国家自然科学基金(506080386)
江苏省六大人才高峰项目(06-F-014)
关键词
三轴试验
固结
孔压
位移
tri-axial experiment
consolidation
pore pressure
deformation
