Evaluasi Kekuatan dan Kestabilan Tanggul Lumpur Sidoarjo Berdasarkan Profil Kecepatan Gelombang Geser

Arung Laby, Dharma (2026) Evaluasi Kekuatan dan Kestabilan Tanggul Lumpur Sidoarjo Berdasarkan Profil Kecepatan Gelombang Geser. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Praktik keinsinyuran ini dilaksanakan untuk mengevaluasi kondisi kekakuan dan kestabilan tanggul Lumpur Sidoarjo melalui penerapan metode geofisika Multichannel Analysis of Surface Waves (MASW) dengan menjunjung tinggi prinsip profesionalisme, keselamatan dan kesehatan kerja serta perlindungan lingkungan (K3L), dan kode etik keinsinyuran. Evaluasi tanggul dilakukan sebagai bentuk tanggung jawab profesional insinyur dalam menjamin keselamatan infrastruktur dan meminimalkan risiko kegagalan tanggul terhadap masyarakat dan lingkungan sekitar. Survei MASW dilakukan pada empat segmen tanggul, yaitu P.76–77, P.78–79, P.79–82, dan P.83–84, dengan tujuan memperoleh profil kecepatan gelombang geser (Vs) bawah permukaan, menganalisis distribusi dan variasi nilai Vs sebagai indikator kondisi mekanik tanah, serta melakukan evaluasi awal kestabilan tanggul berbasis interpretasi parameter geofisika. Data MASW diproses melalui analisis dispersi dan inversi 1-D yang dikonstruksi menjadi penampang quasi-2D untuk menggambarkan variasi lateral dan vertikal nilai Vs pada tubuh tanggul. Seluruh tahapan pekerjaan, mulai dari akuisisi data hingga interpretasi hasil, dilaksanakan sesuai prosedur kerja yang aman, mengedepankan aspek K3L, serta mematuhi kaidah dan kode etik keinsinyuran. Hasil analisis menunjukkan adanya perbedaan karakteristik kekakuan tanah antarsegmen, di mana segmen P.76–77 dan P.78–79 didominasi oleh nilai Vs rendah hingga menengah yang mengindikasikan material relatif lunak dan heterogen, sedangkan segmen P.79–82 dan P.83–84 menunjukkan nilai Vs menengah hingga tinggi yang lebih kontinu dan mencerminkan kondisi material yang lebih kaku. Berdasarkan interpretasi profil Vs dan pertimbangan enjinering, tingkat kestabilan relatif tanggul diurutkan dari yang paling stabil hingga yang paling rendah yaitu P.83–84, P.79– 82, P.78–79, dan P.76–77. Praktik ini menunjukkan bahwa metode MASW efektif sebagai metode non-destruktif untuk mendukung evaluasi kondisi kekuatan dan kestabilan tanggul, serta dapat digunakan sebagai dasar rekomendasi teknis yang berorientasi pada K3L dalam pengelolaan dan pemantauan infrastruktur tanggul Lumpur Sidoarjo.
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This engineering practice was conducted to evaluate the stiffness and stability conditions of the Sidoarjo Mud embankment through the application of the geophysical Multichannel Analysis of Surface Waves (MASW) method, while upholding the principles of professionalism, occupational health and safety and environmental protection (HSE), and engineering ethics. The embankment evaluation represents the professional responsibility of engineers to ensure infrastructure safety and to minimize the risk of embankment failure to surrounding communities and the environment. The MASW survey was carried out along four embankment segments, namely P.76–77, P.78–79, P.79–82, and P.83–84, with the objectives of obtaining subsurface shear wave velocity (Vs) profiles, analyzing the distribution and variation of Vs values as indicators of soil mechanical properties, and performing a preliminary embankment stability assessment based on geophysical parameter interpretation. MASW data were processed through dispersion analysis and 1-D inversion, which were subsequently constructed into quasi-2D sections to depict the lateral and vertical variations of Vs within the embankment body. All stages of work, from data acquisition to result interpretation, were carried out in accordance with safe working procedures, prioritizing HSE aspects and complying with established engineering codes of ethics. The results indicate variations in soil stiffness characteristics among the embankment segments, where segments P.76–77 and P.78–79 are dominated by low to moderate Vs values, suggesting relatively soft and heterogeneous materials, while segments P.79–82 and P.83–84 exhibit moderate to high Vs values that are more continuous, reflecting stiffer material conditions. Based on the interpretation of Vs profiles and engineering considerations, the relative embankment stability is ranked from the most stable to the least stable as follows: P.83–84, P.79–82, P.78–79, and P.76– 77. This practice demonstrates that the MASW method is an effective non- destructive approach for supporting the evaluation of embankment strength and stability and can serve as a basis for HSE-oriented technical recommendations in the management and monitoring of the Sidoarjo Mud embankment infrastructure.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	LUSI, tanggul, Profil Vs, MASW
Subjects:	Q Science Q Science > QE Geology > QE539.2.S4 Seismic models
Divisions:	Interdisciplinary School of Management and Technology (SIMT) > 23902-Engineer Professional Program
Depositing User:	Dharma Arung Laby
Date Deposited:	26 Feb 2026 01:08
Last Modified:	26 Feb 2026 01:08
URI:	http://repository.its.ac.id/id/eprint/132621

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