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《Journal of Yangtze River Scientific Research Institute》 2009-12
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Triaxial Tests Effect Study on Drilling and Pumped Sands of Gravelly Soil

HUANG Ling 1,2,XU Han 1,RAO Xi-bao 1,HUANG Bin 1,HE Xiao-ming 1 (1.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Wuhan 430010,China;2.Faculty of Engineering,China University of Geosciences,Wuhan 430074,China)  
If the gravelly soil used for core impervious material,which has the poorer permeability,is needed to do consolidated drained triaxial tests by traditional methods for reaching the target of enough saturation and consolidation,the test processes of saturation,consolidation and shearing will take a long time.Generally speaking,traditional method is unacceptable.From the device performance of large-scale triaxial test instrument or test time.To improve the test efficiency a new drainage method of consolidated drained triaxial tests was put forward in this paper,and the verification on the test has been done.As the experiment result of the scheme indicated,the sand drain,the replacement ratio of which is between 1% and 3%,has little effect on the stress and strain,and soil shear strength index,but it is significantly beneficial to accelerate the soil sample's processes of saturation,consolidation,drainage,pore pressure dissipation and so on.The test's efficiency is 2 or 3 times higher than before.From an imperforate sample to a drilled sample,c is scattering,and the value of φ increases in range of relatively small changes.The filter papers are pasted from top to bottom of the soil sample and the boreholes inside it are filled with sands,thus this method is considered to be a scientifically rational,effective and good method.It can attain the accurate and reliable shear strength index and parameters of the E-B model.
【Fund】: 长江科学院中央级院所基金(YWF200815)
【CateGory Index】: TU411.93
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