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All Journal Jurnal Teknik Sipil Indonesian Geotechnical Journal
Tiasundari, Nastiti
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences

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Earth Wall dengan Tanah Marginal dengan Pengujian Skala Penuh Tiasundari, Nastiti; Prakoso, Widjojo A; Harninto, Dandung Sri
Jurnal Teknik Sipil Vol 32 No 3 (2025): Jurnal Teknik Sipil - Edisi Desember
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2025.32.3.8

Abstract

Abstrak Mechanically Stabilized Earth Wall (MSE Wall) banyak dilakukan sebagai salah satu alternatif dinding penahan tanah. Ketidaktersediaan material granular bergradasi baik sesuai dengan persyaratan menyebabkan penggunaan tanah marginal tidak dapat dihindari. Penelitian ini bertujuan untuk melihat performa dari MSE Wall dengan timbunan tanah marginal. Pada penelitian ini akan dilakukan pembuatan model dinding dengan tinggi 3 m menggunakan timbunan tanah marginal clayey silt. Perkuatan yang akan digunakan adalah strip geosintetik yang terbuat dari anyaman benang polyester kuat tarik tinggi dengan kuat tarik 50 kN, panjang penjangkaran 3 m (1H), spasi vertikal 0,6 m, dan spasi horizontal 0,6 m. Pembebanan akan dilakukan secara bertahap dari mulai 10 kPa, 20 kPa, hingga 30 kPa. Proses saturasi akan berlangsung selama 5 hari setelah pembebanan terakhir dilakukan. Monitoring akan dilakukan terhadap pergerakan dinding, gaya aksial tarik yang terjadi pada perkuatan, dan tekanan yang terjadi pada dinding. Gaya tarik aksial terjadi paling besar pada layer bagian atas yang disertai dengan pergerakan dinding ke arah dalam facing pada akhir proses saturasi dikarenakan turunnya tegangan efektif, berkurangnya kuat geser, terjadinya settlement akibat beban, dan efek suction yang berkurang. Kata-kata Kunci: Infiltrasi air, MSE Wall, strip geosintetik, tanah marginal, tanah yang diperkuat
Implementation of Sludge-Filled Geotextile Tubes as a Sustainable Coastal Protection Measure in Muddy Coastline Tiasundari, Nastiti; Harninto, Dandung Sri; Ady, Rizal Ansari; Sulaiman, Dede M.
Indonesian Geotechnical Journal Vol. 5 No. 1 (2026): Vol. 5, No. 1, April 2026
Publisher : Himpunan Ahli Teknik Tanah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56144/igj.v5i1.142

Abstract

Coastal erosion is one of the major challenges faced along the northern shoreline of Java Island. This phenomenon results in degradation of the coastline, threatening not only the local ecosystems but also the livelihoods of coastal communities. The soft, muddy coastal characteristics of this region make conventional hard-engineering structures less effective and unsustainable, prompting the need for alternate solutions. This study aims to evaluate the effectiveness of sludge-filled geotextile tubes (GI-Tubes) as an erosion control measure in muddy coastal areas. A field experiment was conducted using three GI-Tube units, each measuring 1.3 meters in height and 20 meters in length, installed parallel to the shoreline. The GI-Tubes were made from double-layered needle-punched staple fiber polypropylene non-woven geotextile and filled with locally sourced sludge mixed with flocculants to promote effective sediment floc formation within the tubes. The small opening size of the non-woven geotextile facilitated efficient dewatering while retaining the sludge inside. The outer layer of the GI-Tube provided high UV resistance and enhanced sediment-trapping capability, offering additional protection and extended durability. The double-layered design of the geotextile tubes enhances their overall structural integrity, enabling them to withstand hydrodynamic forces such as wave and coastal currents. After five months, a height reduction of approximately 0.4 meters was observed, likely due to settlement of the sludge filling. Monitoring conducted 2 years after installation indicated that the sludge fill remained solid and well-consolidated with no sign of damage, thereby confirming good performance of the structure. Satellite imagery analysis 40 months post installation indicated shoreline accretion accompanied by a significant expansion of mangrove growth, reaching up to 50 m beyond the initial vegetation line. These findings suggest that sludge-filled GI-Tubes can be an effective, low-cost, and sustainable solution for mitigating coastal erosion in soft-soil coastal environments.
Co-Authors Ady, Rizal Ansari Dede M. Sulaiman, Dede M. Harninto, Dandung Sri Prakoso, Widjojo A