›› 2010, Vol. 31 ›› Issue (11): 3678-3682.

• Testing Technology • Previous Articles     Next Articles

Study of soil-water charactiristics and matric suction measurement device for unsaturated silty soil

WANG Gui-yao，LI Bin，LUO Jun，FU Hong-yuan   

  1. School of Civil and Architecture Engineering, Changsha University of Science & Technology, Changsha 410076, China
  • Received:2009-11-12 Online:2010-11-10 Published:2010-11-24

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Abstract:

Based on the principle for tensiometer to measure the unsaturated soil matric suction, a new matric measurment device was made. With continuously reviewing and improvment for the measurement result , the unsaturated soil matrix suction measurement device with more simple, convenient, fast and reliable advantages was achieved in the experiment. With this device, the matric suctions of silty soils with different water contends, different compactness or cyclic wetting-drying were measured; and the soil-water characteristic curves of silty soils with different compactnesses were obtained. Through the Boltzmann model in Origin sofeware to fit with the experiment curve, it’s show that the influence for the water content to the matric suction was improved greatly by the high compactness, and cyclic wetting-drying influence the matric suction and shear strength of the silty soils greatly.

Key words: silty soil, matric suction, measurement device, compactness, cyclic wetting-drying

CLC Number: 

  • TU 411
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