収縮挙動より見た土の工学的性質
土の工学的性質 (I)
1965 年 1965 巻 14 号 p. 32-35
詳細
1965 年 1965 巻 14 号 p. 32-35
Previously, the investigation of shrinkage of soil were focussed only on the measurement of the amount of shrinkage.
The author introduced the pF concept to the investigation of shrinkage and clarified the importance of the rate process.
Tests were conducted with the Kanto Loam valcanic ash soil and the paddy field soil. Results are as follows:-
1. The power that causes shrinkage is indicated by the pF value. The yield value of soil is closely related to the critical pF value when shrinkage is observed for the first time.
2. The amount of shrinkage is affected by the rate of drying.
3. The shrinkage of Tachikawa Loam (the Kanto Loam volcanic ash soil) continues up to the high pF value. This fact is due to the soil structure and its affinity to water.
4. The shrinkage of soil is closely related to the one axial strengh, the viscosity and the rigidity. The investigation of shrinkage of soil should be developed further on the basis of the relaxation process.
