Riverbank freeze-thaw erosion along a small mountain stream, Nikko volcanic area, central Japan

2006 ◽  
Vol 17 (4) ◽  
pp. 325-339 ◽  
Author(s):  
Manabu Yumoto ◽  
Takayuki Ogata ◽  
Norikazu Matsuoka ◽  
Eiji Matsumoto
Keyword(s):  
Mountain Stream ◽  
Volcanic Area ◽  
Central Japan ◽  
Freeze Thaw

scholarly journals Frost damage of bricks composing a railway tunnel monument in Central Japan: field monitoring and laboratory simulation

2005 ◽  
Vol 5 (4) ◽  
pp. 465-476 ◽  
Author(s):  
C. Thomachot ◽  
N. Matsuoka ◽  
N. Kuchitsu ◽  
M. Morii
Keyword(s):  
Frost Damage ◽  
Field Monitoring ◽  
Laboratory Simulation ◽  
Freezing Front ◽  
Railway Tunnel ◽  
Central Japan ◽  
Freeze Thaw ◽  
Unidirectional Freezing ◽  
Vacuum Saturation ◽  
Laboratory Results

Abstract. Bricks of tunnels and bridges of Usui Pass railway (Japan) exposed to north are subject to frost damage. Average depth of erosion due to detachment of angular blocks is around 1-1.5 cm. In order to assess this weathering and to understand its mechanism, an experimental study was carried out in the field and laboratory. Field monitoring showed the combination of seasonal and diurnal freezing with a maximum of heave when the freezing front reached 5 cm depth. Bricks taken from the site were submitted to unidirectional freezing at capillary and vacuum saturation in the laboratory. Results showed that frost damage of bricks was favoured by high saturation level and repetition of freeze-thaw cycles.

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