摘要
根据变形等效原则介绍确定折减吸力的具体方法,采用折减吸力代替真实吸力进行非饱和土土压力系数和膨胀量的计算,计算不同水位条件下非饱和土的静止土压力、主动土压力、被动土压力以及不同水位条件下非饱和土的膨胀量和降雨条件下非饱和土的膨胀量。计算结果合理地反映了非饱和土土压力和膨胀量的分布趋势。将计算结果与离心模型试验和模型槽试验结果进行对比,两者具有很好的一致性。
A method of determination of reduced suction based on the principle of equivalence of deformation is introduced; and the reduced suction is used as an essential variable in the earth pressure calculation of unsaturated soils on retaining wall and swell increment. The rest soil pressure, active soil pressure, passive soil pressure of unsaturated soil under different water table conditions, and swell increment of unsaturated soil under different water level conditions and swell increment that are caused by rainfall have been considered. The calculation results have rationally reflected the distribution trend of unsaturated soil pressure and swell increment. Comparing the calculation results with the results of centrifugal model test and the model trough test, it is found that they have very good consistency. Calculation results also verify the proposed formulation.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2008年第A02期3341-3348,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50779039)
交通部西部建设资助项目(200231874616)
南京水利科学研究院基金资助项目(Y30401)
关键词
土力学
非饱和土
折减吸力
土压力
膨胀量
soil mechanics
unsaturated soils
reduced suction
earth pressure
swell increment
