?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENENTUAN+LITOLOGI+LAPISAN+BAWAH+PERMUKAAN%0D%0ABERDASARKAN+MODEL+KECEPATAN+2D+TOMOGRAFI%0D%0ASEISMIK+REFRAKSI+UNTUK+GEOTEKNIK+JALAN+TOL&rft.creator=ESHA+FIRNANZA%2C++1215051022&rft.subject=Teknologi+(General)&rft.description=Survei+pendahuluan+menggunakan+metode+seismik+refraksi+merupakan+hal+penting%0D%0Auntuk+menentukan+batas+lapisan+lapuk+dengan+lapisan+keras+pada+pekerjaan%0D%0Ageoteknik+jalan+tol.+Masalah+utama+dalam+pekerjaan+seismik+refraksi+adalah%0D%0Amelakukan+interpretasi+hasil+dari+survei+menjadi+data+bawah+permukaan+yang%0D%0Aakurat.+Pada+penelitian+ini+dilakukan+pemodelan+kecepatan+lapisan+bawah%0D%0Apermukaan+menggunakan+tomografi+seismik+refraksi.+Tujuan+dari+penelitian+ini%0D%0Ayaitu+membuat+model+2D+kecepatan+untuk+menentukan+dan+menganalisis+batas%0D%0Aantara+lapisan+lapuk+dengan+litologi+batuan+keras+untuk+pembangunan+jalan+raya%0D%0Asesuai+dengan+standar+ASTM+D+5777+pada+masing-masing+lintasan+lapangan%0D%0AFRMLN+yang+terdiri+dari+line+E2%2C+E3%2C+E4%2C+dan+E5.+Metode+pengambilan+data+yang%0D%0Adigunakan+yaitu+generalized-reciprocal+method+dengan+beberapa+tahapan%0D%0Apengolahan+data+yang+terdiri+dari+koreksi+statik%2C+penapisan%2C+penguatan%2C+pemilihan%0D%0Afirst-break%2C+inversi+dan+pemodelan+tomografi.+Berdasarkan+hasil+pemodelan+dapat%0D%0Adiidentifikasi+dua+jenis+litologi+lapisan+lapuk+dan+tiga+litologi+batuan+keras+pada%0D%0Adaerah+penelitian.+Litologi+lapisan+yang+mengalami+pelapukan+diantaranya+top+soil%0D%0Adengan+kecepatan+0-375+m%2Fs+dan+weathered+layered+(soil)+dengan+kecepatan+750-%0D%0A1125+m%2Fs%2C+sedangkan+litologi+batuan+keras+diantaranya+tuff+dengan+kecepatan%0D%0A1500-1875+m%2Fs%2C+tuff+silika+dengan+kecepatan+2250-4125+m%2Fs%2C+dan+andesit+dengan%0D%0Akecepatan+lebih+dari+5250+m%2Fs.+Lapisan+yang+diidentifikasi+terjadi+pelapukan+pada%0D%0ALINE+E2+memiliki+variasi+ketebalan+2-6%2C3+meter%2C+LINE+E3+memiliki+variasi%0D%0Aketebalan+1-6%2C3+meter%2C+LINE+E4+memiliki+variasi+ketebalan+1-5%2C6+meter%2C+dan+LINE%0D%0AE5+memiliki+variasi+ketebalan+1-4+meter+dari+permukaan.%0D%0AKata+kunci%3A+Geoteknik%2C+generalized-reciprocal+method%2C+tomografi%2C+jalan+tol%2C+tuff%2C%0D%0Atop+soil%2C+weathered+layered+(soil).%0D%0A%0D%0AABSTRACT%0D%0A%0D%0APreliminary+survey+using+refraction+seismic+method+is+an+important+thing+to%0D%0Adetermine+boundaries+between+weathered+layer+and+rigid+layer+on+highway%0D%0Ageotechnical+survey.+The+main+thing+in+refraction+seismic+survey+is+to+do%0D%0Ainterpretation+survey+result+to+accurate+subsurface+data.+This+research+conducted%0D%0Asubsurface+velocity+modeling+using+refraction+seismic+tomography.+The+purpose%0D%0Aon+this+research+is+to+make+2D+velocity+model+to+determine+and+analyze%0D%0Aboundaries+between+weathered+layer+and+rigid+layer+lithology+for+highway%0D%0Aconstruction+corresponding+to+ASTM+D+5777+standard+on+each+line+from+FRMLN%0D%0Afield+consist+of+line+E2%2C+E3%2C+E4%2C+and+E5.+Acquisition+data+using+generalizedreciprocal%0D%0Amethod+with+several+processing+data+stages+consist+of+static+correction%2C%0D%0Afiltering%2C+gain%2C+first-break+picking%2C+inversion+and+tomography+modeling.+Based+on%0D%0Amodeling+result%2C+there+is+two+kind+of+weathered+layer+lithology+and+three+kind+of%0D%0Arigid+rocks+lithology+on+research+location.+Weathered+layer+lithology+consist+of+top%0D%0Asoil+in+velocity+0-375+m%2Fs+and+weathered+layered+(soil)+in+velocity+750-1125+m%2Fs%2C%0D%0Awhile+rigid+rocks+lithology+consist+of+tuff+in+velocity+1500-1875+m%2Fs%2C+silicic+tuff+in%0D%0Avelocity+2250-4125+m%2Fs%2C+and+andesite+in+velocity+more+than+5250+m%2Fs.+Identified%0D%0Alayer+which+occur+a+weathering+in+LINE+E2+had+a+thickness+variation+around+2-6.3%0D%0Ameter%2C+LINE+E3+had+a+thickness+variation+around+1-5.6+meter%2C+and+LINE+E5+had+a%0D%0Athickness+variation+around+1-4+meter+from+surface.%0D%0AKeyword%3A+Geotechnical%2C+generalized-reciprocal+method%2C+tomography%2C+highway%2C%0D%0Atuff%2C+top+soil%2C+weathered+layered+(soil).&rft.publisher=FAKULTAS+TEKNIK+&rft.date=2017-11-17&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F29575%2F1%2FABSTRACT%2520%2528ABSTRAK%2529.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F29575%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F29575%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++ESHA+FIRNANZA%2C+1215051022++(2017)+PENENTUAN+LITOLOGI+LAPISAN+BAWAH+PERMUKAAN+BERDASARKAN+MODEL+KECEPATAN+2D+TOMOGRAFI+SEISMIK+REFRAKSI+UNTUK+GEOTEKNIK+JALAN+TOL.++FAKULTAS+TEKNIK+%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F29575%2F