摘要
利用室内一维固结试验研究了非饱和硬土在受到长期荷载作用下的固结特性。研究发现非饱和硬土的长期固结曲线在"反S"型趋势后继续下弯,揭示了非饱和硬土内部超静孔隙气压力和超静孔隙水压力的分段消散过程。温度对于非饱和硬土长期固结特性的影响较为明显,随温度的升高,固结速率明显增大。非饱和硬土并不一定能完全满足高速铁路地基土的设计要求,实际工程中还要根据土体性质、排水条件、上覆荷载等条件进行综合判定。
The consolidation property under long-term load of unsaturated hard soil is studied with onedimensional consolidation tests.The results show that the consolidation curve continues the next bend after the form of ＂reserve S＂,which reveals that the excess pore air pressure and excesses pore water pressure in unsaturated hard soil dissipates in different stages.The temperature influence to the long-term consolidation property of unsaturated hard soil is obvious.With the rise of the temperature,the consolidation rate increases significantly.Unsaturated hard soil doesn＇t completely meet the design requirements of high speed railway.In practical engineering the soil property,drainage conditions,the cover load are all need for comprehensive judgment.
出处
《工程勘察》
CSCD
2012年第11期28-30,36,共4页
Geotechnical Investigation & Surveying
关键词
非饱和硬土
长期固结
温度影响
unsaturated hard soil
long-term consolidation
temperature influence
