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All Journal Jurnal Ilmiah Poli Rekayasa Jurnal Bangunan: Konstruksi & Desain
Putra, Hendri Gusti
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Civil Engineering, Building, Construction & Architecture Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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EVALUASI KEGAGALAN STRUKTUR DINDING PENAHAN GRAVITASI PADA LERENG TANAH KOHESIF Yuliet, Rina; Hakam, Abdul; Putra, Hendri Gusti; Alfian, Rifqi Luthfi
Jurnal Ilmiah Poli Rekayasa Vol 18, No 2 (2023): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.18.2.292

Abstract

Stabilitas dinding penahan tanah (DPT) gravitasi sangat dipengaruhi oleh berat sendirinya. Jika masa tanah yang berada di belakang DPT adalah tanah kohesif, maka air yang berada di dalam retak tarik akan menyebabkan bertambahnya tekanan tanah lateral aktif. Dalam perancangan DPT gravitasi yang menahan tanah kohesif dengan kemiringan lereng yang curam, sering ditemukan nilai koefisien tekanan tanah yang tidak dapat didefinisikan akibatnya nilai tekanan tanah aktif tidak dapat dihitung. Untuk menganalisis stabilitas DPT digunakan persamaan Mazindrani dan Ganjali (1997) untuk perhitungan tekanan tanah aktif sesudah retak tarik. Dari hasil evaluasi stabilitas DPT diketahui bahwa dimensi dinding DPT eksisting memiliki nilai Faktor Keamanan (FK) lebih besar dari yang disyaratkan, dimana nilai FKguling = 2.5, FKgeser = 3, dan FKdaya dukung = 3. Penyebab kegagalan struktur DPT disebabkan kaena belum dilakukan kelanjutan pembangunan DPT pada bagian lereng yang curam yang berada dekat dengan DPT eksisting. Ketika hujan yang datang berkepanjangan menyebabkan terjadinya kelongsoran lereng dan menimbulkan kegagalan struktur DPT eksisting yang berada dekat dengan lereng yang longsor tersebut. Solusi yang tepat untuk mencegah terjadinya kegagalan struktur DPT eksisting adalah dengan melanjutkan pembangunan DPT pada bagian lereng yang longsor, memperbaikai drainase dan melakukan memotong lereng menjadi horizontal.
Studi Pemodelan Daya Dukung Fondasi Telapak Pada Tanah Lempung Dengan Perkuatan Geotekstil Woven Putra, Hendri Gusti; Andriani, Andriani; Hakam, Abdul; Boyosa, Viola De
Jurnal Bangunan, Konstruksi & Desain Vol 1 No 3 (2023): Desember 2023
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbkd.1.3.168-176.2023

Abstract

One of the important things in developing decent residential land is the availability of buildings, facilities and infrastructure that are safe and comfortable to live in. However, with the development of settlements and increasingly expensive land, the use of areas with soft soil conditions cannot be avoided. Construction on soft soil causes many problems, including the relatively low bearing capacity of the soil and large settlements so that soil stability is disturbed. The low shear strength of clay soil causes the shear stress generated by the foundation to be large enough to cause the construction building to collapse. To overcome these soil conditions, the soft clay soil is stabilized first. One way to overcome this problem is to add reinforcement material, namely geotextiles. Geotextiles can develop very high tensile strength. Apart from that, geotextiles also function as a filter and hold fine particles so that they are not carried away by water seepage, separating two layers between soil and soil or soil and water so that they do not mix with each other. In this research, modeling will be carried out with variations in the number of geotextile layers, namely 1 layer with a depth of 5 cm, 1 layer with a depth of 10 cm, and 2 layers with a depth of 5 & 10 cm, which will be compared with without using geotextiles. The results of the research showed that the soil bearing capacity in the laboratory with 2 layers of woven geotextile reinforcement with a depth of 5 & 10 cm had the highest value of 9.723N/cm2. As well as the soil bearing capacity in the plaxis software, the highest bearing capacity was found in the hardening soil model material with a depth of 5 cm, amounting to 46,402 N/cm2.​
Co-Authors Abdul Hakam Alfian, Rifqi Luthfi Andriani Andriani Boyosa, Viola De Rina Yuliet, Rina