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All Journal Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil
Ratna Dewi
Jurusan Teknik Sipil dan Perencanaan, Fakultas Teknik, Universitas Sriwijaya
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Peningkatan Daya Dukung Pondasi pada Tanah Lempung dengan Perkuatan Kolom Tanah Ratna Dewi; Hanafiah; Ridho Ustadi
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol 9 No 2 (2020): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (768.864 KB) | DOI: 10.35139/cantilever.v9i2.43

Abstract

One of the problematic soils for construction if the soil is used as a foundation for a construction is clay soil which has relatively low shear strength and bearing capacity. Therefore, it needs an improvement effort to increase the strength of the clay soil. The reinforcement soil column is an alternative effort to improve the soil. This paper presents the results of laboratory-scale experimental on the reinforcement modelling of clay soil columns mixed with 6% rice husk ash (RHA). Modelling was carried out with 6 variations of column groups with constant column length of 67cm. The first three variations are the variation in the distance between columns (s/d) with a fixed diameter of 8 cm. The other three variations are column diameter variations with a fixed s/d ratio. The results showed that the larger the distance between the columns, the smaller the bearing capacity of the soil foundation. If the s/d ratio is constant, it is found that the larger the column diameter, the greater the bearing capacity of the soil foundation. The maximum ultimate bearing capacity of the soil is achieved in variations with a column diameter of 12cm and a distance between columns of 30cm (s/d = 2.5) with a value of 39.56 kPa. This bearing capacity provides a BCR value of 3.75% or almost 4 times the bearing capacity of the unreinforced foundation.
Pemodelan Perkuatan Menggunakan Bambu Untuk Daya Dukung Pondasi Dangkal pada Tanah Gambut Yulindasari Sutejo; Sutanto Muliawan; Ratna Dewi; Febrian Hadinata; Budi Ariawan; Reffanda Kurniawan Rustam
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol 9 No 2 (2020): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.053 KB) | DOI: 10.35139/cantilever.v9i2.62

Abstract

Some of the unfavorable characteristics of peat soil are low bearing capacity and high compressibility. The reinforcing material used in this research which functions the same as geogrid are bamboo materials (grids and woven). The bamboo material used aims to determine the carrying capacity and reduction of shallow foundations on peat soil before being reinforced and after being reinforced. Bamboo matting and rectangular patterned bamboo grids. Laboratory scale testing were used as the research methodology. The peat soil sampling location came from the area of Dusun III Banyu Urip, Banyuasin Regency, South Sumatra Province. The bamboo material is obtained from the Seberang Ulu area, Palembang City and sand is obtained from the sand depot in the Musi II area, Palembang City. The results of laboratory testing show that the addition of the number of reinforcement layers and the effective layer depth distance will give a greater bearing capacity ratio (BCR) value. The bearing capacity value of the shallow foundation before being reinforced on peat soil using Terzaghi's analysis is 45.232 kpa. Then, after testing the variation in the depth of the layer d = 0b; d = 0.25b; and d = 0.5b with the number of layers 1 layer, 2 layers and 3 layers obtained a variation which gives the highest bearing capacity value of layer depth variations d = 0.25b with the number of layers of 3 layers. The bearing capacity value is 94 kpa with a BCR value of 2.08 (percent increase of 107.96 %).
Co-Authors Budi Ariawan Febrian Hadinata Hanafiah, Hanafiah Reffanda Kurniawan, Reffanda Ridho Ustadi Sutanto Muliawan Yulindasari Sutejo, Yulindasari