Abstract：Abstract: Research purposes: The compression characteristics of unsaturated cohesive soil is an important calculations parameter used in subgrade engineering, foundation engineering, underground engineering and slope engineering design calculations. In order to define the influence of matric suction on the one - dimensional compression characteristic， a series of one - dimensional compression tests are carried out under controlled matric suction and increasing the net vertical stress for the unsaturated cohesive foundation soil in Hefei area. Research conclusions ： (1) The e - lgg curves in different matric suction were composed of two straight line segments， and the net vertical stress of 300 kPa was the cut - off point. (2 ) The relationship between compression index and the matric suction fitted the Barcelona model； Compression index and tangent compression coefficient decay exponentially with the increasing matric suction. ( 3 ) The concepts of suction tangent compression coefficient are proposed. The suction tangent compression coefficient showed exponential relationship with the net vertical stress. (4 ) The research result can provide theoretical reference to the engineering characteristics of the unsaturated cohesive soil bed.
李晓宁，巫锡勇，冯君，朱宝龙. 非饱和黏性地基土一维压缩特性试验研究[J]. 铁道工程学报, 2016, 33(7): 7-10.
LI Xiao - ning1，WU Xi - yong2, FENG Jun2, ZHU Bao - long1. Experimental Research on the One - dimensional Compression Characteristics of Unsaturated Cohesive Soil. Journal of Railway Engineering Society, 2016, 33(7): 7-10.
2016, Vol. 33 
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