?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F39428%2F&rft.title=Finite+Element+Analysis+of+Damage+to+Highway+Embankments+due+to+Dynamic+Subsidence+Resulting+from+Longwall+Mining&rft.creator=Li%2C+Mingzhou&rft.description=A+coal+panel+of+a+longwall+mining+site+was+extracted+below+highway+I-70.+A+70+ft+embankment+is+located+in+the+center+of+the+panel.+This+study+analyzed+the+influence+of+subsidence+due+to+longwall+mining+on+the+behavior+of+this+embankment+and+others+along+this+highway.+A+Finite+Element+Method+(FEM)+that+uses+ABAQUS%2C+and+a+field+study+that+employs+slope+stakes%2C+inclinometers+and+piezometers+were+used+to+analyze+its+deformation+and+stability.+A+user-defined+displacement+model+was+applied+to+the+embankment%E2%80%99s+bottom+to+simulate+the+dynamic+subsidence.+This+model+was+obtained+from+a+regression+analysis+of+the+vertical+subsidence+profile+obtained+from+the+Surface+Deformation+Prediction+System+(SDPS)+software.+In+the+field+study%2C+the+ARCGIS+(Lidar+method)+was+utilized+to+construct+the+vertical+subsidence+contour+employing+data+from+the+slope+stake+survey+conducted+by+PennDOT.+The+embankment+deformations+from+the+simulation+were+compared+to+those+obtained+from+the+field+measurements.+Both+indicated+that+the+location+of+the+maximum+subsidence+on+the+embankment+was+the+same.+%0D%0AUsing+the+FEM%2C+a+slope+stability+analysis+of+the+embankment+was+conducted+at+each+step+of+the+dynamic+subsidence.+Sections+experiencing+large+deformations+were+determined.+These+sections+were+used+for+a+slope+stability+analysis+employing+the+shear+strength+reduction+method+(SRM).+Factors+of+safety+(FS)+and+their+equivalent+shear+strength+reduction+factors+(SRF)+were+calculated+at+these+critical+cross+sections.+An+FS+range+was+proposed+to+describe+the+slope+stability+of+the+embankment.+The+lower+bound+of+the+FS+range+identifies+an+embankment+experiencing+small+deformations.+The+upper+bound+of+the+FS+range+identifies+an+embankment+that+experienced+large+deformations.+This+upper+bound+FS+developed+in+response+to+the+strain+hardening+behavior+of+the+soils.++This+behavior+was+obtained+from+triaxial+compression+tests.+Thus%2C+as+a+result+of+the+deformations+induced+by+the+longwall+mining%2C+the+embankment+became+stronger+and+safer.+%0D%0AAlso%2C+a+parametric+study+was+conducted+to+explore+the+influence+that+the+orientation+of+the+longwall+mining+and+the+overburden+level+have+on+the+deformations+and+stability+of+the+embankments.+It+was+found+that+these+parameters+have+a+significant+influence.&rft.date=2020-09-28&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F39428%2F1%2FMingzhou_etdPitt2020.pdf&rft.identifier=++Li%2C+Mingzhou++(2020)+Finite+Element+Analysis+of+Damage+to+Highway+Embankments+due+to+Dynamic+Subsidence+Resulting+from+Longwall+Mining.++Doctoral+Dissertation%2C+University+of+Pittsburgh.++++(Unpublished)++