ikramulloh, aulia (2020) Analisis Penurunan Tanah Akibat Likuifaksi Di Pesisir Kota Pacitan Provinsi Jawa Timur. Other thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
04311640000091-Undergraduate_Thesis.pdf Download (7MB) | Preview |
Abstract
Kota Pacitan terletak di bagian selatan Pulau Jawa yang berbatasan langsung
dengan Samudera Hindia dimana terdapat Palung Jawa tempat tumbukan antara
lempeng Eurasia dan India-Australia. Berdasarkan kondisi geologisnya Kota
Pacitan terletak di dataran dengan jenis tanah aluvial yang merupakan jenis tanah
yang berpotensi terjadi likuifaksi karena strukturnya yang belum kompak dan kaya
akan air tanah. Likuifaksi merupakan fenomena alam dimana tanah akan
mengalami perubah sifat dari padat menjadi cair akibat meningkatnya tekanan air
pori tanah dan berkurangnya gaya geser tanah akibat gempabumi. Likuifaksi tanah
menyebabkan beberapa dampak salah satunya adalah deformasi tanah vertikal
(settlement). Analisa untuk menghitung settlement dilakukan dengan metode yang
diusulkan oleh Zhang dkk (2002). Berdasarkan hasil perhitungan, pada gempabumi
dengan magnitude 8,5 SR, 8 SR, dan 7,5 SR terjadi settlement di lokasi tinjauan.
Penurunan tanah terjadi di semua titik lokasi pengeboran CPT untuk kondisi 8,5 SR
dan 8 SR dan hanya terjadi pada 9 dari 40 titik pada kondisi 7,5 SR. Visualisasi
dalam bentuk peta dilakukan untuk mengetahui luas wilayah yang terkena dampak
kerusakan akibat settlement. Dari peta tersebut diketahui Kota Pacitan memiliki
wilayah dengan potensi mengalami kerusakan dengan berbagai tingkat kerusakan
yaitu ringan, menengah, dan berat ketika terjadi settlement yang disebabkan oleh
likuifaksi akibat gempabumi. =========================================================================The city of Pacitan is located in the southern part of Java island which directly
adjacent to the Indian Ocean where there is a Java Trench located in which the
Eurasian and Indian-Australian plates collided. Based on its geological conditions,
Pacitan City is located on a plain with alluvial soil type which is a type of land that
has the potential for liquefaction due to its structure which is not yet compact and
rich in groundwater. Liquidity is a natural phenomenon where the soil experiences
a change in nature from solid to liquid due to increased soil pore water pressure and
reduced shear force which happen because of an earthquake. Soil liquefaction
causes several impacts, one of which is vertical land deformation (settlement).
Analysis to calculate settlement is done by the method proposed by Zhang et al.
(2002). Based on the calculation, an earthquake with an magnitude of 8.5 SR, 8 SR,
and 7.5 SR occurred settlement at the review site. Land subsidence occurred at all
points of the CPT drilling location for 8.5 SR and 8 SR and only occurred in 9 of
40 points at 7.5 SR. Visualization in the form of maps is carried out to find out the
area affected by settlement. From the map, it is known that Pacitan City has an area
with potential damage with varying degrees of damage that is mild, medium, and
severe when there is a settlement caused by liquefaction due to the earthquake.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Likuifaksi, settlement, peta, Liquifaction, settlement, map. |
| Subjects: | Q Science > QE Geology > QE538.8 Earthquakes. Seismology |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Aulia Ikramulloh |
| Date Deposited: | 12 Aug 2020 09:07 |
| Last Modified: | 04 Jun 2023 13:52 |
| URI: | http://repository.its.ac.id/id/eprint/77759 |
Actions (login required)
 |
View Item |