Perancangan Pekerjaan Oprit Terhadap Stabilitas Timbunan Pada Proyek Flyover Sekip Ujung Palembang Menggunakan Timbunan Mortar Busa
DOI:
https://doi.org/10.29103/tj.v16i2.1398Keywords:
lightweight fill, foam mortar, safety factorsAbstract
Abstrak
Timbunan ringan mortar busa biasanya digunakan pada kondisi dasar tanah yang lunak. Saat ini, timbunan ringan juga banyak digunakan sebagai pengganti timbunan tanah, salah satunya pada oprit flyover di area perkotaan. Oleh karena itu, penelitian ini menghitung stabilitas timbunan ringan mortar busa pada kondisi normal dan kondisi gempa saat diterapkan pada oprit flyover. Material penyusun timbunan ringan ini terdiri atas pasir, semen, air, dan busa. Stabilitas timbunan oprit flyover dengan material mortar busa ini dianalisis menggunakan software Plaxis berdasarkan SNI 8460:2017 tentang Persyaratan Perancangan Geoteknik hingga mencapai faktor keamanan yang memenuhi persyaratan. Hasil analisis menunjukkan bahwa stabilitas timbunan mortar busa memiliki faktor keamanan sebesar 5,99 dan 2,72 pada abutment 1 dan 2 dalam kondisi normal, serta 3,73 dan 1,63 dalam kondisi gempa. Sementara itu, analisis penurunan menghasilkan nilai sebesar 0,49 cm dan 0,39 cm. Nilai tersebut menunjukkan bahwa faktor keamanan timbunan ringan pada oprit flyover ini masuk dalam kategori aman.
Kata kunci: Timbunan ringan, mortar busa, faktor keamanan
Abstract
Lightweight foam mortar fill is typically used on soft soil foundations. Currently, lightweight fill is also widely used as a substitute for soil fill, particularly on flyover ramps in urban areas. Therefore, this study calculates the stability of lightweight foam mortar fill under normal and seismic conditions when applied to flyover ramps. The materials comprising this lightweight fill consist of sand, cement, water, and foam. The stability of the flyover approach embankment using this foam mortar material was analyzed using Plaxis software in accordance with SNI 8460:2017 on Geotechnical Design Requirements until a safety factor meeting the specifications was achieved. The analysis results show that the stability of the foam mortar fill has safety factors of 5,99 and 2,72 at abutments 1 and 2 under normal conditions, and 3,73 and 1,63 under seismic conditions. Meanwhile, the settlement analysis yielded values of 0,49 cm and 0,39 cm. These values indicate that the safety factor for the lightweight fill on this flyover ramp falls within the safe category.
Keywords: lightweight fill, foam mortar, safety factors
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