William Wijaya, Mikel Darren Manason, Yuli Fajarwati

Evaluasi Perkuatan Lereng dengan Dinding Penahan dan Borepile pada Lokasi Menara SUTET

Introduction

Evaluasi perkuatan lereng dengan dinding penahan dan borepile pada lokasi menara sutet . Evaluasi perkuatan lereng menara SUTET dengan dinding penahan & borepile menggunakan Plaxis 2D. Analisis stabilitas lereng pada tanah silty clay menunjukkan peningkatan faktor keamanan signifikan, terutama terhadap gempa.

Abstract

Penelitian ini bertujuan untuk menganalisis stabilitas lereng pada titik T.367 jalur SUTET 500 KV Tanjung Jati B-Pemalang menggunakan metode elemen hingga dengan perangkat lunak Plaxis 2D. Data yang digunakan berupa data sekunder hasil uji laboratorium tanah, CPT, serta kontur lereng dari drone. Tanah di lokasi didominasi oleh silty clay yang cenderung lemah saat jenuh. Dua potongan lereng (A-A dan B-B) dianalisis dalam kondisi eksisting dan setelah perkuatan menggunakan dinding penahan tanah setinggi 5 m dan borpile sepanjang 10 m. Hasil menunjukkan bahwa kondisi eksisting memiliki faktor keamanan (SF) 1,892 dan 1,986 (statik), serta 0,228 dan 0,249 (seismik), yang tidak memenuhi kriteria aman terhadap gempa. Setelah perkuatan, nilai FS meningkat menjadi 2,462 dan 2,627 (statik), serta 1,115 dan 1,134 (seismik). Bidang longsor menunjukkan bahwa perkuatan efektif mereduksi deformasi dan mencegah bidang keruntuhan. Sistem perkuatan kombinasi dinding penahan dan borpile mampu meningkatkan kestabilan lereng secara signifikan pada tanah silty clay, khususnya terhadap pengaruh beban dinamik

Review

The paper addresses a highly relevant and critical engineering problem: the stability of slopes supporting vital infrastructure, specifically SUTET towers, in areas prone to seismic activity. The chosen methodology, employing the finite element method with Plaxis 2D, is a robust and widely accepted approach for complex geotechnical analyses. The use of a combination of secondary lab data, CPT results, and drone-derived topographical information provides a comprehensive data foundation. The focus on silty clay, a soil type notoriously problematic when saturated and under dynamic loading, further underscores the practical significance of this study. The findings clearly demonstrate a critical deficiency in the existing slope stability, particularly under seismic conditions, where the factor of safety (FS) falls significantly below acceptable thresholds. The proposed combined reinforcement system, utilizing both a retaining wall and borepiles, proves remarkably effective. The substantial increase in both static and, more importantly, seismic FS values (from ~0.2 to >1.1) highlights the efficacy of the intervention. The observation that the reinforcement actively reduces deformation and prevents the formation of critical failure planes provides strong evidence for the practical applicability and success of the design. This research offers a compelling solution to enhance the resilience of critical infrastructure against geotechnical hazards. While the abstract presents a clear and impactful summary, a full paper would benefit from detailing the specific design parameters of the retaining wall and borepiles (e.g., borepile diameter, spacing, wall thickness, type of wall) for better replicability and practical understanding. Furthermore, a discussion on the specific seismic design criteria or target FS values used for evaluation would strengthen the analysis of "safe against earthquake." Considering the importance of SUTET towers, it would be beneficial to clarify whether the tower's loads were explicitly incorporated into the slope stability analysis. Overall, this study makes a significant contribution to geotechnical engineering practice and is highly recommended for publication, pending elaboration on these specific details within the full manuscript.

Full Text

Comments

You need to be logged in to post a comment.