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D

DEVELOPMENT OF TECHNOLOGIES FOR PREVENTION AND MITIGATION OF SEDIMENT-RELATED DISASTERS INDUCED BY UNFORESEEN NATURAL PHENOMENA

Research Period ÞFY2016-2021

Program Leader ÞErosion and Sediment Control Research Group TOMITA Yoko

Research Group ÞConstruction Technology Research Department (Advanced Technology Research Team), Geology and Geotechnical Engineering Research

Group(Geology Research Team, Soil Mechanics and Dynamics Research Team, Erosion and Sediment Control Research Group (Volcano and Debris Flow Research Team, Landslide Research Team), Cold-Region Construction

Engineering Research Group (Structures Research Team, Structures Research Team, Geological Hazard Research Team)

Abstract : Countermeasures against sediment-related disasters are generally designed based on the recurrence interval of rainfall events. However, the frequency and intensity of some recent extreme rainfall events exceeded the current planning criteria. Moreover, sediment-related disasters induced by unforeseen natural phenomena, such as volcanic eruption, catastrophic earthquakes, torrential rainfall, and rapid snowmelt have newly emerged as critical issues.

Therefore, we aim to provide novel technologies for the prevention and mitigation of those disasters, by achieving the following respective targets:

1) Development of innovative monitoring and management systems of slope failures following unforeseen natural phenomena;

2) Development of innovative hazard risk assessment and traffic regulation guidelines following unforeseen natural phenomena;

3) Development of innovative structural design for rockfall protection fences and unmanned construction technologies following unforeseen natural phenomena.

Keywords : Sediment-related disasters, Slope failure, Hazard risk assessment, Unmanned construction

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›p# P¹ÔÖ$lr#Ó.*Ug `$e ª›p¶`\ a$ ¬Â›pGK$¼ ›xl )& $WÝlÒ$Ô֝™ekÖу‰)&Ì

´ÖÑ#qÒÖÑ)& Ò³¯ÖÑ/¢

4% C#…´ /Š ±‰ / ¥ ÛÚ ÜP¹ÔÖ_ ›pGK

ÚÜGK ÚÛ 4 Ü

x ²© % $+uØÈœc0P Ž-$+×

ÇH $¦ wgÛ pG Ü#'  /p ,©,

¼ ›© $TG#`$+ × × "+ ˆ

(24)

3 XRS^MOd5TL8lL+JL>`jR

+/ ] n$+ uØ 2= - 90 - CP Ž - x$Ô֝™%¤› ÚlW#kW† l#

Ç Ôt#l"ÔÖ+$ÔÖ$yØ#)+›

p# ¸($ µ *-, $+×% e $Š ‘

¼*-' *$†¾ ‘ #)+g/‘< × ¼›

w$ YmP 2= - 90- CØ Œ #C>- 2#

), }‘q ¹.-, ÚlW$P¹ÔÖ%$

g` $eª›p#Ó, / Ã,($ x

l% ¼›#% ¸*g /‘<$E ‚ #)+k Á$Ȝc 0P gs $E” $ Œ +¡($ µ *-,

¼p™ % Œ YÐR{ÎÐ#'+ ¼ { ÎЉ '§ wÎ È ÎÉ$ ¼p%¡

" x ² ©%u~ v# I~ Ì9Se$j Á

$+×, ¢w kW†l$ÔÖ $ÔÖ

*¼*-,x %P¹ÔÖ$ekÖу‰ ( C# # à w (ÒÖÑ ß § w$Ö²´,#

Û Ü¼ ›© $™ ܤ›x$Ô֝™

ÛܐÒÖÑ#),4 %C #…´

Û ÜÒ³¯ÖÑ#),4% C#…´ 4 ›pGK Ú $Ô֝™

(25)

3 XRS^MOd5TL8lL+JL>`jR

(.*­Ú l ekÖу‰l—j ,œ, Ì´ÖÑ £"+ÔÖ ²´

(ÒÖÑ$l#)(ekÖу‰ —j , jV +½V¿Î š$”À$ Ð #•^ œ µ *-,

ÚGKÚÛ 4 Ü

x ²© %¦ w }(uC gÆ¥r½z "$+

×Ì´,$+× JÍ]#(_•$ ¼ ›v _ ±

‰Z $¼ ›L| , ©, Š‘ e *- g/‘< ש$+×<Å ( {<Å 5 E$yØ/S §UZg ` +$' Æ¥j "ÔÖ¼ ›,($

Û Ü¼ ›© $™ Û Ü¤›x$Ô֝™

ÛܐÒÖÑ#),4 %C #…´

Û Ü Ò³¯ÖÑ#),4 % C#…´ 4 ›pGK Ú$Ô֝™

(26)

3 XRS^MOd5TL8lL+JL>`jR

µ *-, 4 % C#…´ /¼, Ì´ÖÑ%

!"ekÖу‰% Úv¬ž/Ã+P

¹ÔÖ$yØ#),›p , D Í]$›p

$¼ ›r 0ƒ,ÔÖ L| % xg `$

eª›p$ $ JG#+EÀ $Í]$ ¼›(

$†…%" eª›p$ #qr"ÔÖ

›p¤¡, *$ © $ÔÖ#q

ÏS"^·|(, 5 E$yØ/S ,^·| ¼›»[/ Ä, ˹½V%"

nr ¥"œ”#),$+×$/ Q|$¬Â Š ‘q  )&ÏS"$+×M ·P/¹¨$³| ² q{ G x" © µ *-,

ÛGKÛ Û4 Ü

x ²© %¦ w }(uC gÆ¥r½ zj"$

Û Ü ¼› ©$™ Û Ü¤›x$Ô֝™

ÛܐÒÖÑ#),4 %C #…´

Ûܐҳ¯ÖÑ#),4% C#…´ 4 ›pGKÛ $Ô֝™

(27)

3 XRS^MOd5TL8lL+JL>`jR

+×Í]$kW † l$ÔÖ ¼›Ûº lncÜ

©$q P$¨ ¤¡($š¥ Ð$ }‘0º Û}‘ P %P :$ ?3C $ ¼› ©$ÐR#  ‘

¼*-Ö ‘ Ð1C &C ),C($ dJ -Ü#)+qP G Ð#•‘Ð1 ¡r½ z

"-Õ #),($, Úl !W$P¹ÔÖ)&¤

›$ÔÖ( Æ¥ ÔÖ,GK Ú

_•#Í]$ÔÖL| %xg`$eª›p$

$JG #+ EÀ $Í]$¼›( $†…%"

ÏS"^·|(, ¼ ›»[/ Ä , ˹½V%" nr¥"œ”#)+ }‘P$ / Q|$¬Â $+×M·P$«] $ÏS"Án •‘ q

"!$ ³|² q{Æ »"›p, µ *-, ÛÜGK ÛÛ 4 Ü

Û Ü ¼› ©$™ Û Ü¤›x$Ô֝™

ÛܐÒÖÑ#),4 %C #…´

Ûܐҳ¯ÖÑ#),4% C#…´ 4 ›pGK $Ô֝™

(28)

3 XRS^MOd5TL8lL+JL>`jR

x ²© %( ( g/‘< × © /Se +Se#)+g /‘ $Š K¡ "+

gs%VÔ Z+Se#)+ , ¡

#Æ ¥ ÔÖ'¡›p dn -,© , ÎÉg º #* Se© $ÎÉ ,¢

W#¤¡›pÆ ¥ x¡( «Se 8r #¡

›p, ¤›$Ô֝™/¼, Ð1ÅÖ_ #š

,($Ì´ÖÑ Ú v¬ž§ wÒÖÑ (Ú v¬ž#%™ "Æ¥l"($

Úl W$P¹ÔÖ(ÔÖ$²´Ò Í Ú v¬ž§ w

$Ì´ÖÑP¹ÔÖ$yØ(>o ekÖу‰

(Æ ¥l"N "%, x ²g `$ $ J G¤¡, Seš× P G% )S

#(ÎÉ, ¢Ì fW$ ¼ ›'ÎÉ4Ë

Û Ü ¼› ©$™ Û Ü¤›x$Ô֝™

ÛܐÒÖÑ#),4 %C #…´

Û ÜÒ³¯ÖÑ#),4% C#…´ 4 ›pGK $Ô֝™

(29)

3 XRS^MOd5TL8lL+JL>`jR

$yØ%"Ô֝™#)% ,¢ Ìfw#

¤¡^·|(, $›p/†…,'#

% $¼© y», ( ( g /‘< × gs ©> VÔ Z' ¼› © 9F $«]

%gs½ VPoŽ-+ŽP}Ï q{

"# (”À y »"›p, Se 8r#%{;Ìh #)+ , ¡ Se

w% * %Æ œ¥#œ”/¹Š‘ $™ $+×

$ , $™"!/¬Â, (y » µ *-, ÛÚ ÜÐ1 ÅÖ _ ›pGK

ÚÜGK ÜÛ 4 Ü

x ²© %Í]#_D$+×J #± ‰$¼› L|

+¼ › #q/¹+ ˆq © ›p

¡, …¡ }(۞ el ÜE#D ¯Ô ZªO

Û Ü ¼› ©$™ Û Ü¤›x$Ô֝™

ÛܐÒÖÑ#),4 %C #…´

Û Ü Ò³¯ÖÑ#),4 % C#…´ 4 ›pGKÝ$Ô֝™

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