Abstract：In order to study the influence rules of clay and silt on the liquefaction resistance of sand in the mixture of clay, silt and sand, based on the static and dynamic triaxial tests, the sand specimens with two different fines (clay and silt) contents (FCs), 5% and 10%, and three different fines proportions are investigated by the static and dynamic triaxial system. The test results show that the liquefaction resistance of specimens with the same fines content and different fines proportions are different. When the fines content of the specimens is different, the laws of liquefaction resistance are different with the monotonous change of the clay or silt content in the fines. The liquefaction resistance of the specimens with FC of 10% are higher than that of the specimens with FC of 5%. The clay and silt play roles of filling, bonding and skeleton effects on the sand particles. And with the change of clay and silt content in the fines, the proportion of these three roles is different under different fines contents.
李涛, 唐小微. 黏粒和粉粒的共存对砂土静动力液化影响的试验研究[J]. 岩土工程学报, 2019, 41(S2): 169-172.
LI Tao, TANG Xiao-wei. Experimental study on effect of coexistence of clay and silt on static and dynamic liquefaction of sand. Chinese J. Geot. Eng., 2019, 41(S2): 169-172.
[1] YANG J, WEI L M.Collapse of loose sand with the addition of fines: the role of particle shape[J]. Géotechnique, 2012, 62(12): 1111-1125. [2] XENAKI V C, ATHANASOPOULOS G A.Liquefaction resistance of sand-silt mixtures: an experimental investigation of the effect of fines[J]. Soil Dynamics and Earthquake Engineering, 2003, 23: 183-194. [3] 董林, 王兰民, 夏坤, 等. 含细粒砂性土标贯液化判别方法改进研究[J]. 岩土工程学报, 2015, 37(12): 2320-2325. (DONG Lin, WANG Lan-min1, XIA Kun, et al. Improvement of SPT-based liquefaction discrimination methods for fines-containing sandy soils[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(12): 2320-2325. (in Chinese)) [4] CARRERA A, COOP M R, LANCELLOTTA R.Influence of grading on the mechanical behavior of stave tailings[J]. Géotechnique, 2011, 61(11): 935-946. [5] THEVANAYAGAM S, MOHAN S.Intergranular state variables and stress-strain behaviour of silty sands[J]. Géotechnique, 2000, 50(1): 1-23. [6] SL237—1999土工试验规程[S]. 1999. (SL237—1999 Specification of Soil Test[S]. 1999. (in Chinese))
