PENGARUH KEMIRINGAN FONDASI TIANG PANCANG BATTERED PILE PADA TANAH LEMPUNG DAN TANAH PASIR

Swendrinata Suwardi, Andryan Suhendra
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Abstract

The Battered Pile  is one of the foundation designs that aims to increase the lateral bearing capacity of the foundation. Battered Pile are designed with a certain slope that aims to increase the lateral capacity of the soil. The type of soil used will affect the lateral capacity of the pole. Calculation of bearing capacity of the pile is carried out on the condition of clay and sand soils at slope 00 to +200. The calculation results will then be analyzed to understand the effects that occur. The calculation results will be presented in the p-y curve method. The use of this method is expected to make it easier to understand the characteristics of Battered Pile for soil conditions. Based on the analysis it was found that an increase in the  capacity of the pile up to 23% in the slope of 100 to 150. Sand soil in conditions below the surface of the ground water will have a linear carrying capacity and have a lower deflection value when compared to clay soil at a depth of 2 meters. But at a depth of 16 meters, clay has a point where it has a lower deflection value compared to sandy soil.


Abstrak

Tiang pancang Battered Pile merupakan salah satu rekasaya fondasi yang bertujuan untuk meningkatkan daya dukung lateral fondasi. Tiang Battered Pile dipancang dengan kemiringan tertentu yang bertujuan untuk meningkatkan daya dukung lateral tanah. Jenis tanah yang digunakan akan mempengaruhi daya dukung lateral tiang. Perhitungan daya dukung tiang dilakukan pada kondisi tanah lempung dan tanah pasir pada kemiringan 00 hingga +200. Hasil perhitungan kemudian akan dianalisis untuk memahami pengaruh yang terjadi. Hasil perhitungan akan disajikan dalam metode p-y curve. Penggunaan metode ini diharapkan dapat memudahkan dalam memahami karakteristik tiang Battered Pile terhadap kondisi tanah. Berdasarkan analisis didapatkan bahwa terjadi peningkatan daya dukung tiang hingga 23% pada kemiringan 100 hingga 150. Tanah pasir pada kondisi di bawah permukaan air tanah akan mengalami kenaikan daya dukung secara linier  dan memiliki  nilai lendutan yang lebih kecil jika dibandingkan dengan tanah lempung pada kedalaman 2 meter. Tetapi pada kedalaman 16 meter, tanah lempung memiliki titik dimana memiliki nilai lendutan yang lebih kecil jika dibandingkan dengan tanah pasir.

Keywords

Battered Pile; tanah pasir; tanah lempung; p-y curve

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References

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Hannigan, Patrick J., et al. Design and Construction of Driven Pile Foundations. National Highway Institute, 2016.

Moore, M. A. Raked Piles, Battered and Misunderstood. Structure Magazine, 2005 .

Reese, L. C., dan Van Impe, W. Single Pile and Pile Groups Under Lateral Loading. 2 nd Edition, CRC Press, 2001.

Badan Standarisasi Nasional. SNI 6371-2015: Tata cara pengklasifikasian tanah untuk keperluan teknik dengan sistem klasifikasi unifikasi tanah. Badan Standarisasi Nasional, 2015.

Tomlinson, M. J. Pile Design and Construction Practice. E & F N, Spon, 1994.


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