Noerhidayat, Dandi Taufiq (2024) Analisis Struktur Tanah Dengan Pengukuran Mikrotremor Menggunakan Metode HVSR Di Daerah Perlintasan Sebidang KA Gaul Gubeng (PT. Kereta Api Daop 8 Surabaya). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk menganalisis karakteristik dinamika tanah di sekitar perlintasan sebidang KA GAUL GUBENG (PT. KERETA API DAOP 8 SURABAYA) menggunakan metode Horizontal to Vertical Spectral Ratio (HVSR). Studi ini melibatkan pengukuran mikrotremor untuk menentukan frekuensi natural (f0 ), periode dominan(T0), ketebalan sedimen, amplifikasi (A0), dan indeks kerentanan tanah (Kg) akibat getaran kereta api serta penyebaran kecepatan gelombang geser Vs30. Metode HVSR digunakan untuk memperoleh spektrum frekuensi tanah yang kemudian dianalisis untuk memahami respons dinamis tanah terhadap aktivitas seismik. Hasil dari 6 parameter dapat diketahui bahwa di perlintasan sebinang KA GAUL GUBENG DAOP 8 sudah sesuai dengan peta geologi dimana tanah terdapat material batuan berupa alluvial dari proses sedimentasi. Frekuensi Natural (f0) didaptkan sebesar 1,04866 Hz – 1,07588 Hz dengan rata rata 1,09197 Hz menunjukan bahwa ketebalan sedimen tersebut sangat tebal. Periode dominan (T0) didapatkan nilai sebesar 0,8848 s hingga 0,9536 s yang menunjukan bahwa tanah lunak dengan kekuatan geser yang rendah. Amplifikasi atau A0 didapatkan nilai sebesar 2,31 hingga 3,75, dengan area berisiko tinggi terhadap getaran gempa kuat pada faktor amplifikasi lebih dari 3. Indeks kerentanan seismik (Kg) berkisar 1,84 hingga 3,47 m²/s dimana nilai tertinggi akan mengalami atau risiko seismik yang besar.
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This study aims to analyze the characteristics of soil dynamics around the GAUL GUBENG railway crossing (PT. KERETA API DAOP 8 SURABAYA) using the Horizontal to Vertical Spectral Ratio (HVSR) method. This study includes microtremor measurements to determine the natural frequency (f0),, dominant period (T0), sediment thickness, amplification (A0), and soil vulnerability index (Kg). The HVSR method is used to obtain the soil frequency spectrum which is then analyzed to understand the dynamic response of the soil to seismic activity. The results of the 6 parameters show that at the GAUL GUBENG DAOP 8 railway crossing, it is in accordance with the geological map where the soil contains alluvial rock material from the sedimentation process. The Natural Frequency (f0) was obtained at 1.04866 Hz - 1.07588 Hz with an average of 1.09197 Hz indicating that the sediment thickness is very thick. The dominant period (T0) obtained a value of 0.8848 s to 0.9536 s indicating that the soil is soft with low shear strength. Amplification or (A0), obtained a value of 2.31 to 3.75, with a high risk area for strong earthquake vibrations at an amplification factor of more than 3. The seismic vulnerability index (Kg) ranges from 1.84 to 3.47 m²/s where the highest value will experience or a large seismic risk.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Frequency, Land Dynamics Characteristics, Microzonation of Earthquakes, Dominant PerioD, Frekuensi, HVSR, Karakteristik dinamika tanah, Mikrozonasi gempa bumi, Periode Dominan. |
| Subjects: | Q Science Q Science > QC Physics Q Science > QE Geology Q Science > QE Geology > QE471 Sedimentary rocks. Sedimentology Q Science > QE Geology > QE538.8 Earthquakes. Seismology Q Science > QE Geology > QE539.2.S4 Seismic models Q Science > QE Geology > QE601 Geology, Structural |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Dandi Taufiq N |
| Date Deposited: | 14 Aug 2024 04:27 |
| Last Modified: | 14 Aug 2024 07:52 |
| URI: | http://repository.its.ac.id/id/eprint/115239 |
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