Warriessandy, Dicky Nanda (2014) Studi Risiko Kerentanan Tanah Akibat Soil Liquefaction Karena Gempa Bumi Di Wilayah Pesisir Kota Pacitan. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Wilayah pesisir kota Pacitan merupakan daerah rawan gempa karena dilalui oleh
Lempeng Indo-Australia dan Lempeng Eurasia. Berdasarkan hasil boring test di 5 titik
yang telah dilakukan, bahwa kondisi tanah di lokasi studi sebagian besar adalah tanah
berpasir yang berpotensi terjadi soil liquefaction. Potensi soil liquefaction dievaluasi
berdasarkan nilai SF (Safety Factor) yang merupakan perbandingan antara CSR (Cyclic
Stress Ratio) dengan CRR (Cyclic Resistance Ratio). Untuk penilaian risiko dilakukan
dengan menggunakan metode probabilitas likuifaksi dan nilai LPI (Liquefaction Potential
Index). Hasil analisis yang didapatkan bahwa lokasi yang memungkinkan terjadi
fenomena soil liquefaction di wilayah pesisir kota Pacitan yaitu di daerah sisi barat daya
Bagak, daerah sisi tenggara Bagak, daerah Sidorejo, daerah sisi barat laut Sidorejo,
daerah sisi barat Kali Muso, daerah sisi timur Kali Muso, daerah sisi barat daya Kali
Teleng, daerah Sidoharjo, daerah sisi barat laut Pleren, daerah Ngampel, daerah sisi utara
Kali Muso, daerah Selare, daerah sisi timur Sidosari, daerah Plosomakmur, daerah sisi
barat Plosorejo, daerah sisi timur Plosorejo, daerah sisi barat laut Selare, daerah
Kradenan, daerah sisi timur Sidorukun, daerah sisi timur Baleharjo, daerah Sundeng,
daerah Betulo, daerah Purwoharjo, dan daerah sisi timur laut Kuwarasan. Untuk tingkat
risiko yang dihadapi akibat terjadinya soil liquefaction yaitu daerah dengan kategori
risiko “Sangat Tinggi” terjadi di daerah sisi barat Kali Muso, daerah sisi barat daya Kali
Teleng, daerah Sidoharjo, daerah sisi barat laut Pleren, daerah Ngampel, daerah Selare,
daerah Plosomakmur, daerah sisi barat Plosorejo, daerah sisi barat laut Selare, dan daerah
Sundeng. Sedangkan daerah dengan kategori risiko “Rendah” terjadi di daerah sisi
tenggara Bagak, daerah Sidorejo, daerah sisi barat laut Sidorejo, dan daerah sisi timur
Sidorukun.
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The coastal area Pacitan is earthquake prone areas due to be passed by the IndoAustralian Plate and the Eurasian Plate. Based on the results of test boring at the 5 points
that have been made, that the condition of the soil in the study area are predominantly
sandy soil occurring soil liquefaction potential. Soil liquefaction potential was evaluated
based on the value of SF (Safety Factor) which is the ratio between the CSR (Cyclic
Stress Ratio) and CRR (Cyclic Resistance Ratio). For the risk assessment carried out by
using the method of liquefaction probability and the value of LPI (Liquefaction Potential
Index). The results of the analysis showed that the possible locations of soil liquefaction
phenomenon occurred in Pacitan city coastal areas that are in southwest side Bagak area,
southeast side Bagak area, Sidorejo area, northwest side Sidorejo areas, west side Kali
Muso area, east side Kali Muso area, southwest side Kali Teleng area, Sidoharjo area,
northwest side Pleren area, Ngampel area, north side Kali Muso area, Selare area, east
side Sidosari area, Plosomakmur area, west side Plosorejo area, east side Plosorejo area,
northwest side Selare area, Kradenan area, east side Sidorukun area, east side Baleharjo
area, Sundeng area, Betulo area, Purwoharjo area, and northeast side Kuwarasan area. For
the level of risk due to soil liquefaction is the area with the risk category "Very High"
occurs in west side Kali Muso area, southwest side Kali Teleng area, Sidoharjo area,
northwest side Pleren area, Ngampel area, Selare area, Plosomakmur area, west side
Plosorejo area, northwest side Selare area, and Sundeng area. While areas with risk
categories "Low" occurs in southeastern side Bagak area, Sidorejo area, northwest side
Sidorejo area, and east side Sidorukun area.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 624.151 36 War s 3100015058045 |
| Uncontrolled Keywords: | Soil liquefaction, Gempa bumi, Risiko, Probabilitas likuifaksi, LPI (Liquefaction Potential Index). |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Yeni Anita Gonti |
| Date Deposited: | 10 Sep 2020 05:56 |
| Last Modified: | 10 Sep 2020 05:56 |
| URI: | http://repository.its.ac.id/id/eprint/81809 |
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