Experimental Researchonthe Influence of the Fine Particle Content onthe Consolidation and Compressibility of Silty Sand from the Passenger Dedicated Railway
(1. MOE Key Laboratory of High Speed Railway Engineering， Southwest Jiaotong University， Chengdu， Sichuan 610031，China; 2. The Third Railway Survey and Design Institute Group Corporation，Tianjin 300251，China)
Abstract：Abstract : Res earch purposes ： In order to improve the lack of tlie study of tlie influence of tlie fine particle content on the consolidation and compressibility of silty sand from the passenger dedicated railway，based on the new Tongliao to Xinmin nortli station high - speed railway engineering， a series of experiments tests were carried out to measure the influence of the fine particle content on the void ratio, the consolidation coefficient， the compression modulus， the development of stess - strain relationship and the strain with time. The mixing rate of t!ie fine particle content were 5%， 15%，30% and 40%for loose，medium and dense saturated silty sand respectively. Research conclusions：( 1 ) Witii the increase of the content of fine particles， the void ratio and the consolidation coefficient of loose silty sand decrease gradually，the compression modulus increases conversely. Besides，the influence of the fine content was remarkable when it was more than 15%. And the development law of the void ratio， the consolidation coefficient and the compression modulus of trie medium and dense saturated sand were same as the loose silty sand. But there is a significant turning point in the development law of the void ratio and the consolidation coefficient. That is，they begin to increase gradually，when the FC reaches 30(2) In accordance with the content of fine particles，the lawof deformation of the silty sand in different state with time and the strain with load function were fitted by logarithmic function and hyperbolic function. And the more reliable unified expressions were obtained. (3 ) The influence of the fine particle content on the consolidation and compressibility of silty sand from the passenger dedicated railway has been verified in detail by computer model simulation test. (4 ) The research results could be applied to the design and construction of the similar passenger dedicated line subgrade silt foundation treatment.
王武刚1,罗强1,许再良2,隋孝民2. 细粒含量对粉砂固结压缩特性影响的试验研究[J]. 铁道工程学报, 2017, 34(4): 15-20.
WANG Wu - gang1，LUO Qiang1，XU Zai - liang2，SUI Xiao - min2. Experimental Researchonthe Influence of the Fine Particle Content onthe Consolidation and Compressibility of Silty Sand from the Passenger Dedicated Railway. Journal of Railway Engineering Society, 2017, 34(4): 15-20.
2017, Vol. 34 
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