技術部報告集 第 19 号 2012 Muroran Institute of Technology 国立大学法人室蘭工業大学
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Sample name Initial water content(%) Angle of inclination( 0 ) Degree of compaction(%) Density(g/cm 3 ) Rainfall intesity(mm/h) case2 case3 case4 case5 Komaoka volcanic soil 34 55 65 85 60 68 0.90 0.63 0.72 100 case1 45 a) b) 600 150 300 150 150 150 150 100 Pore water pressure transducer : pw Soil-moisture meter : sm 65 degree slope unit : mm 442 700 100 250 250 100
(a) u/ σ vo' Sr/Sr0 1.2 1 0.8 0.6 0.4 0.2 0-0.2 pw1 pw2 pw3 pw4 Slip line 65 degree slope R=100 mm/h ρ d= 0.90 g/cm 3 pw1 failure pw3 (b) -0.4 0 500 1000 1500 2000 2500 3000 3 2.5 2 1.5 Elapsed time(sec.) pw4 pw2 Slip line sm1 sm2 sm4 sm3 sm6 sm5 sm1 65 degree slope R=100 mm/h ρ d= 0.90 g/cm 3 sm5 sm3 1 sm4 sm6 0.5 0 500 1000 1500 2000 2500 3000 Elapsed time(sec.) failure sm2 Sr0=37.2%(sm1) Sr0=37.3%(sm2) Sr0=38.4%(sm3) Sr0=38.4%(sm4) Sr0=38.0%(sm5) Sr0=39.8%(sm6)
Slope angle (degree) 80 70 60 50 40 30 ρ 1000 2000 3000 4000 5000 Elapsed time(sec.) Sr/Sr0 u/ σ vo' 2.5 2 1.5 1 1 0.8 0.6 0.4 0.2 0 Slip line sm1 sm2 sm4 sm3 sm6 sm5 65 degree slope R=100 mm/h ρ d= 0.63 g/cm 3 0.5 0 200 400 600 800 1000 Elapsed time(sec.) pw1 pw2 pw3 Slip line pw4 pw4 Sr0=36.1%(sm1) Sr0=20.6%(sm2) Sr0=38.1%(sm3) Sr0=32.7%(sm4) Sr0=37.4%(sm5) Sr0=40.0%(sm6) 65 degree slope R=100 mm/h ρ d= 0.63 g/cm 3 pw3 sm6 sm3 sm2 sm1 sm5sm4 pw1 pw2 failure failure 0 200 400 600 800 1000 Elapsed time(sec.)
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19 http://www.muroran-it.ac.jp/tech/ 2012 3 WG 0508585 271 0143465990