›› 2011, Vol. 32 ›› Issue (S1): 334-0338.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of water holding capacity and mechanism of compacted laterite soil

TAN Yun-zhi1, 2, KONG Ling-wei2, GUO Ai-guo2, WAN Zhi3, ZHANG Hua1   

  1. 1. Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University, Yichang, Hubei 443002, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics,Chinese Academy of Sciences, Wuhan 430071, China; 3. Hunan Communications Research Institute, Changsha 410005, China
  • Received:2010-11-18 Online:2011-05-15 Published:2011-05-16

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Abstract: It is necessary to understand the water holding capacity of laterite soil, which is the basis of preventing cracking and instability of the soil subgrade. Firstly, soil water characteristic curves (SWCCs) of compacted samples with four different dry densities were investigated by using 15 bar pressure plate apparatus. Test results show that there has appeared a plateau stage in the soil water characteristic curve with the decreasing of dry density. What’s more, the length of the plateau stage is intimately related to the dry density of samples , the lower the dry density is, the longer the length of the plateau stage is. Then, combined with pore distribution curves of the four samples, reasons for their different water holding capacities are investigated from the viewpoint of microstructure. Finally, SWCC equations for soil of different compactnesses are established through data fitting.

Key words: laterite soil, water-holding capacity, pore size distribution, compaction

CLC Number: 

  • TU 443
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