| abstract |
The invention discloses a kind of method using the theoretical measurement soil suction of light reflection, mainly includes (1) and uses light reflection theoretical, and the saturation degree for measuring soil distinguishes dry ground and wet soil, and wet soil then carries out in next step；(2) saturation degree is selected from soil-water characteristic curve；(3) dry density is chosen from the compaction curve of actual measurement；(4) in a mold by the dry density of measurement soil compression to step (3) selection and corresponding saturation degree, and taken pictures with camera；(5) image obtained by brightness steps (4) is quantified according to gray value using tonal gradation；(6) average gray value situation of change is analyzed, finds out the relation between saturation degree and gray value.The present invention is a kind of color analysis technology new, direct, that disturbance and low cost are destroyed without intrusion, roadbed, the pad that bankets, earth dam applied to canal dyke, highway and runway etc..The limitation for being commonly used to measure farming land and geotechnical foundation facility suction instrument is avoided, improves application range. |