A Report of Investigation, Design and Construction of Large-Scale Slope Disaster Prevention Works Using the ICT.

Abstract

TheKumamotoearthquakeMj7.3 (Mw7.0) occurredonApril16,2016,centeredintheKumamotoarea,andlargescale of slope collapse broke out in the Aso Ohashi bridge area. In this slope collapse site, damages to any roads and railwayswereintense,furthermore,therewasconcernthatafurtherslopecollapsecouldoccurbyrepeatedaftershock. Therefore,itwasrequiredthattheinvestigationandconstructionwerecarriedoutswiftlywhileensuringsafety.Atthis time,intheareaofacollapsedslopewherepeoplecouldnotenter,aeriallasermeasurementstocontributetothesurvey designalongwithphotogrammetryandmeasurementsbyanUAVinaccordancewiththeprogressofconstructionhave beenconducted,aswellasfurthersurfaceexplorationutilizingtheaboveresults,bedrockstabilityevaluationsandsoon havebeenrealized.Also,thedesignofthesizeandtheshapeforthelandretainingembankment,andalsotheexcavation rangefortheearthremovalworkofthetopofslopeonthebasisofthethree-dimensionaldatathatwasmadebasedon surveyresultsandgeologicalreconnaissance.Thesepreventionworkscarriedoutsafelybyunmannedmachinery,while monitoring the slopes by the field observation under the construction. These series of investigation, design and constructionwereconductedwithusingtheICT (InformationandCommunicationTechnology) .