Basic study on promotion of thawing frozen soil by shock loading

Authors

  • T Watanabe
  • H Maehara
  • S Itoh

DOI:

https://doi.org/10.1260/175095408785416992

Abstract

The aim of study is to confirm a new technique that can crush the frozen soil and/or ice block using underwater shock wave generated by the underwater explosion of explosive. This technique can lead to the earlier sowing, which can have the larger harvest because the duration of sunshine increases. Especially, in Hokkaido prefecture, Japan, if the sowing is carried out in April, we can expect to have 150% of harvest in the ordinary season. In the case of small processing area such as road repairing, frozen soil is thawed by using the heat of gas burner and/or the electric heater. It is not a suitable plan to apply these heating methods to agriculture, from the point of view enormous amount of processing area. Thawing technique for frozen soil is effective against the cold regions, for example, Russia, Norway, and Sweden, etc. At first, we carried out experiments using a detonating fuse and ice block. The propagation process of shock wave into the ice block was observed by means of a high-speed camera. In order to check about that influence we tried to give an actual frozen soil a shock wave. We could get a result that existence of water layer serves an important role in promotion of thawing by the shock loading to the frozen soil.

References

Fukusako, S. and Inaba, H., “Phenomena of heat transfer under low temperature environment and its applications”, Yokendo Ltd., 1996, (in Japanese).

Itoh, S., Kira, A., Nagano, S. and Fujita, M., “ Study on the Properties of Underwater Shock Wave from Explosion of High Explosives”, Journal of the Japan Industrial Explosives Society, Vol.56, No.5, pp.188–194. 1995.

Itoh, S., Nagano, S. and Fujita, M., 1994, “The features of the Assembly for Punching of Pipes by Using the Converging Underwater Shock Wave,” Proceedings of the Symposium of Japan Mechanical Society, 948–3.

Aasanuma, T., 1977, Handbooks on the Visualization of Flows, Asakura Publishing House, Tokyo, Japan.

Watanabe, T., Shigeru, I., Hamada, T., Kuroyama, Y. and Nakachi, A., 2002, “On Crushing of Frozen Soil by Underwater Shock Wave”, ASME PVP-Vol.446-2, pp.105–110. https://doi.org/10.1115/pvp2003-1976

Watanabe, T., Shigeru, I., Hamada, T., Kiyama, O., Kuroyama, Y. and Nakachi, A., 2003, “Basic Study for Crushing of Frozen Soil by Underwater Shock Wave”, ASME PVP-Vol.460, pp.287–291. https://doi.org/10.1115/pvp2003-1976

Published

2008-06-30

How to Cite

Watanabe, T., Maehara, H. and Itoh, S. (2008) “Basic study on promotion of thawing frozen soil by shock loading”, The International Journal of Multiphysics, 2(2), pp. 155-164. doi: 10.1260/175095408785416992.

Issue

Section

Articles

Most read articles by the same author(s)

1 2 3 4 > >>