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Bearing Capacity of Soft Soil Using Bamboo-Geotextile Composite Khatib, Anwar
JURNAL SAINTIS Vol 8 No 2 (2005)
Publisher : UIR Press

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Construction on soft clays is often affected by stability and settlement problems. General stabilization of these soils usually involves expensive soil improvement method in order to enhance stability suitably reducing the potential and prevailing uneven settlement. Studies on soft clay reinforced with bamboo-geotextile composite overlaid by granular layer had been carried out to determine the increase in bearing capacity of strip footing on the soft clay. The bamboos were arranged in square and parallel pattern having various ratio of distance (s) to width of footing (b), s/b = 3.0, 2.0, 1.0 and 0.5. The height of granular material (u) overlying the soft clay varies with u/b = 0.25, 0.50 and 0.75. The soft clay was made from kaolin slurry that was consolidated in square boxes of 600 mm width and 1000 mm height. The results show that there is a great increase in bearing capacity and decrease of settlement at failure for the reinforced model. The bearing capacity increment of more than 127 % was recorded for bamboos of square and parallel pattern, having the s/b = 0.50 at u/b = 0.25. However, bamboo arranged in square pattern gives better improvement of bearing capacity than the parallel pattern. It can be concluded that the bamboo-geotextile composite could be used as another alternative method in improving the bearing capacity of soft clay. This will therefore benefits the construction industry especially in highway engineering.
TINJAUAN DAYA DUKUNG DAN PENURUNAN PONDASI SUMURAN DI PEMUDA CITY WALK DI JL. PEMUDA PEKANBARU PROPINSI RIAU Ridar, Masyriki; Khatib, Anwar
JURNAL SAINTIS Vol 15 No 1 (2015)
Publisher : UIR Press

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[ID] Tujuan penelitian pada pembangunan Pemuda City Walk di Jl. Pemuda Pekanbaru Propinsi Riau ini, untuk mengetahui kuat dukung pondasi sumuran dengan data CPT (Cone Penetration Test) apakah memenuhi syarat yang telah ditetapkan agar konstruksi bangunan tersebut kuat, kokoh dan aman serta untuk mengetahui besarnya penurunan yang terjadi. Ketertarikan peneliti mengambil judul ini adalah dikarenakan kondisi tanah di kota Pekanbaru khususnya lempung dan rawa, sedangkan letak tanah keras pada pembangunan ini adalah dikedalaman 8,00 meter, yang terjadi dilapangan pada pembangunan ini adalah dikedalaman 5,20 meter. Oleh karena itu apakah pondasi ini aman pada kedalaman 5,20 meter. Penelitian yang dilakukan pada bangunan Pemuda City Walk Pekanbaru ini, menggunakan pondasi sumuran yang berbentuk silinder dengan diameter 1,20 meter dengan kedalaman pondasi 5,20 meter. Perhitungan daya dukung pondasi menggunakan data CPT (Cone Penetration Test), perhitungan yang dibahas adalah perhitungan daya dukung  dengan metode Terzaghi dan metode Meyerhof, serta menganalisa penurunan pondasi yang terjadi. Dari hasil analisa daya dukung dengan metode Terzaghi dan Meyerhof diperoleh pondasi sumuran pada kedalaman 5,20 meter adalah 82,560 ton dan 203,17 ton, maka pondasi sumuran iniaman terhadap beban yang akan dipikul yaitu 78,131 ton (Qa>Pmaks). Dan darihasil analisa penurunan pondasi sumuran As 5-D diperoleh total penurunannya 0,0334mm < 12 mm dari penurunan yang diizinkan maka,pondasi sumuran ini aman terhadap penurunan yang terjadi (Stotal< Sizin). [EN] For the foundation of the building must be planned able to bear the burden of the upper structure to the bedrock beneath it. The purpose of research on the development of the Youth City Walk in Jl. Pekanbaru Riau province's youth, to find out strong foundation bearing wells with the data CPT (Cone Penetration Test) if eligible who have been assigned so that the construction of the building is strong, sturdy and safe as well as to determine the magnitude of the decline. Research carried out on the building's Youth City Walk Pekanbaru, using foundation pitting cylindrical with a diameter of 1.20 meters by 5.20 meters depth of the foundation. Foundation bearing capacity calculations using the data CPT (Cone Penetration Test), the calculations discussed are carrying capacity calculation method and the method Terzaghi Meyerhof, and analyze the decline occurring foundation.From the analysis of the carrying capacity of the Terzaghi method and obtained Meyerhof foundation wells at a depth of 5.20 meters was 82.560 tons and 203.17 tons of it, these wells are safe foundation for the load to be carried (Qa> Pmax). While the results of the analysis of the decline foundation sinks As 5-D obtained total reductions 0.0334 mm <12 mm of reduction is allowed then, these wells are safe foundation for the decline (Stotal<Sizin).