Identifikasi Utilitas Bawah Permukaan Menggunakan Metode Ground Penetrating Radar Dan Resistivitas 2D Di PT Asahimas Flat Glass

Dhiaulhaq, Rifqi Roid (2024) Identifikasi Utilitas Bawah Permukaan Menggunakan Metode Ground Penetrating Radar Dan Resistivitas 2D Di PT Asahimas Flat Glass. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT Asahimas Flat Glass akan dilakukan pembangunan transformator yang memerlukan pondasi bawah permukaan sehingga diperlukan studi bawah permukaan. Tujuan penelitian ini adalah memetakan utilitas dan kondisi bawah permukaan. Metode yang digunakan untuk penelitian ini adalah metode geofisika yaitu metode Ground Penetrating Radar (GPR) dan Resistivitas 2D. Telah dilakukan akuisisi metode GPR 19 Lintasan (G1-G19) dan Resistivitas 2D 1 lintasan (R1) yang berturut-turut menggunakan alat Oerad Scudo 500 Mhz dan main unit Geolistrik MAE. Radargram GPR yang dihasilkan telah dilakukan pengolahan menggunakan perangkat lunak ReflexW dengan tahap Dewow, Gain Function, Mean Filter, Bandpass Filter, Background Removal, F-K Filter, dan Input Velocity Lapisan. Data akuisisi Resistivitas 2D dilakukan pengolahan menggunakan perangkat lunas Res2Dinv dan ResIPY Python dengan tahap utama yaitu perhitungan faktor geometri, perhitungan resistivitas semu, formatting pada Notepad, import data (.dat), pengaturan Mesh, pengaturan pra-inversi, dan pemodelan inversi. Didapatkan hasil anomali hiperbola pada radargram GPR (G7-G19) berupa cable trench (Cable trench 1; 2; 3; 4 ) sampai kedalaman 1 m dan plat beton sampai kedalamn 30 cm. Pada hasil penampang Resistivitas 2D didapatkan anomali cable trench berbentuk kontras resistivitas dan anomali Grounding Mesh resistivitas rendah serta jenis endapan lempung pasiran. Pada area target pengukuran (inner box dan outter box) tidak ditemukan adanya anomali selain plat beton.
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PT Asahimas Flat Glass will be constructing a transformer which requires a subsurface foundation so a subsurface study is required. The aim of this research is to map utilities and subsurface conditions. The method used for this research is a geophysical method, namely the Ground Penetrating Radar (GPR) method and 2D Resistivity. Acquisition of the 19-track GPR (G1-G19) and 1-track 2D Resistivity (R1) methods respectively using the Oerad Scudo 500 Mhz tool and the MAE Geoelectric main unit. The resulting GPR radargram has been processed using ReflexW software with Dewow, Gain Function, Mean Filter, Bandpass Filter, Background Removal, F-K Filter and Input Layer Velocity stages. 2D Resistivity acquisition data was processed using Res2Dinv and ResIPY Python software with the main stages namely calculating geometric factors, calculating apparent resistivity, formatting in Notepad, importing data (.dat), Mesh settings, pre-inversion settings, and inversion modeling. The hyperbolic anomaly results were obtained on the GPR radargram (G7-G19) in the form of cable trenches (Cable trench 1; 2; 3; 4) to a depth of 1 m and concrete slabs to a depth of 30 cm. In the results of the 2D resistivity cross section, it was found that the cable trench anomaly was in the form of a resistivity contrast and a low resistivity Grounding Mesh anomaly as well as a type of sandy clay deposit. In the measurement target area (inner box and outer box) no anomalies were found other than the concrete slab.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Ground Penetrating Ground (GPR), Resistivitas 2D, Utilitas Bawah Permukaan; Ground Penetrating Ground (GPR), 2D Resistivity, Subsurface Utility
Subjects:	G Geography. Anthropology. Recreation > GB Physical geography > GB1003.2 Groundwater. T Technology > TA Engineering (General). Civil engineering (General) > TA660.P55 Underground pipeline design, construction and management T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Rifqi Roid Dhiaulhaq
Date Deposited:	31 Jan 2024 06:34
Last Modified:	31 Jan 2024 06:34
URI:	http://repository.its.ac.id/id/eprint/105832

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