ANALISIS DAYA DUKUNG PONDASI TIANG-RAKIT PADA DAERAH RAWAN GEMPA MENGGUNAKAN METODE POULUS DAN PROGRAM NUMERIS PLAXIS

Rini Kusumawardani(1), Henry Apriyatno(2), Rizky Julia Rachmawati(3), Ririn Anggraini(4),

DOI: https://doi.org/10.15294/jtsp.v18i2.7835


(1) Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Semarang (UNNES), Kampus Sekaran, Gunungpati. Semarang
(2) Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Semarang (UNNES), Kampus Sekaran, Gunungpati. Semarang
(3) Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Semarang (UNNES), Kampus Sekaran, Gunungpati. Semarang
(4) Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Semarang (UNNES), Kampus Sekaran, Gunungpati. Semarang

Abstract

Abstract: Yogyakarta are situated in the zone with high  potential of seismicity. Based on Indonesia map seismicity area, it categorized in a seismic zone 4.  The secondary effect of this earthquake  phenomena is a soll settlement due to of decreasng of void volume of soil mass. Based on these issues, the foundation system of building is the primary factor which must be considered. This paper revealed the comparation of foundation behavior due to static by using Poulos Method and PLAXS 2D. Pile-raft designed by Poulos method was chosen as a subject of research. Analysis of liquefaction potential, soil settlement, carrying capacity, and the safety factor was analyzed by using CYCLIC 1D, 2D PLAXIS and Methods Poulus. For analysis by the Poulus method reached a soil settelement 4.3 cm and a safety factor 10.76. While by using PLAXIS 2D obtained 0.30 cm and 2,088 for soil settlement and safety factor respectively. Furthermore, a seismic motion of 9.2 scale of Richter mgnitude are injected into analysis resistance of foundation.

 

Abstrak: Kota Yogyakarta merupakan wilayah yang memiliki potesi sesismik yang tinggi berdasarkan peta potensi gempa Indonesia. Dalam peta tersebut dikatakan bahawa Kota Yogyakarta terletak pada zona seismik 4. Bahaya sekunder yang terjadi akbat peristiwa gempa adalah adanya penurunan tanah. Berdasarkan permasalahan ini,  pemilihansistem fondasi pada pada suatu bangunan adalah hal yang terpenting. Pada artikel ini dijelaskan mengenai perbandingan mengenai perilaku fondasi akibat beban statik meggunakan metode Poulos dan Plaxis 2D. Fondasi tiang rakit dianalisa dengan meggunakan metode Poulos dan Plaxis 2D. Analisis megenai potensi likuifaksi, penurunan tanah, daya dukung fondasi dan faktor kemanan struktur dianalisis menggunakan CYCLIC 1D, Plaxis 2D dan Metode Poulus. Untuk analisis menggunakan metode Poulos pada fondasi rakit-tiang diperoleh nilai penurunan 4,3 cm dan faktor keamanan 10,76.  Untuk analisis menggunakan Plaxis 2D diperoleh penurunan sebesar 0,30 dan angka keamanan pondasi tiang-rakit sebesar 2,088. Selain itu juga dilakukan analisis mengenai ketahanan fondasi ketika menerima beban gempa dengan skala magnitude 9.2 Richter.


Keywords

Pile-raft foundation; Poulus Method; soil settlement; safety factor; Pondasi tiang-rakit; metode Poulus; penurunan tanah; angka keamanan

Full Text:

PDF

References

Brinkgreve, R.B.J., et al. (ed.). 2015. PLAXIS 2D Reference Manual 2015. Netherlands.

De Sanctis, L., Mandolini, A., Russo, G. and Viggiani, C. (2001). Some remarks on the optimum design of piled rafts. personal communication of paper submitted for publication.

Elnashai, A.S., Kim, S.J., Gun, Y.J., and Sidarta, D., "The Yogyakarta Earthquake of May 27, 2006", MAE Center Report No. 07-02, 570, 2007.

Horikoshi, K., & Randolph, M. F. (1996). Research report No. G:1179: A contribution to optimum design of piled rafts. Nedlands: Department of Civil and Resource Engineering, University of Western Australia.

Katzenbach, R., Arslan, U., & Moormann, C. (2000). Piled raft foundation projects in Germany. In J. A. Hamsley (Ed.). Design applications of raft foundations (pp. 323-391). London: Thomas Telford Publishing.

Kusumawardani, R., Lashari, Nugroho, U. & Tri Cahyo H. (2015). Analisis Kenaikan Tekanan Air Pori Pada Pasir Yogyakarta Menggunakan Metode Cyclic Shear-Strain Controlled, Jurnal Teknik Sipil dan Perencanaan, Nomor 1 Volume 17, Januari 2015

Kusumawardani, R., Suryolelono, K.B., Suhendro,B. & Rifai, A.. (2016). The Dynamic Response of Unsaturated Clean Sand at A Very Low Frequancy, International Journal of Technology, Jurnal Teknik Sipil dan Perencanaan, Volume 1, Januari 2016

Muntohar, Agus Setyo. 2010. Mikro-Zonasi Potensi Likuifaksi dan Penurunan Tanah Akibat Gempa Bumi.

Natasya, B. 2011. Studi Pemakaian Pondasi Tiang-Rakit pada Sebuah Proyek Apartemen di Jakarta dengan Menggunakan Metode Konvensional Poulus dan Plaxis Dua Dimensi. Tugas Akhir di Jurusan Teknik Sipil Universitas Indonesia, Jakarta.

Sulistiyani, D.R., Distya Dea Rena Kalista. 2016. Desain Gedung 20 Lantai + 1 Basement di Jalan Diponegoro Semarang. Tugas Akhir Jurusan Teknik Sipil Universitas Negeri Semarang, Semarang.

Poulos, H. G. (2000). Practical design procedures for piled raft foundations. Ed. J. A. Hamsley. London: Thomas Telford Publishing.

Poulos, H. G. (2000). Pile-raft interaction – Alternative methods of analysis. Developments in theory. Geomechanics, Ed. D. W. Smith, & J. P. Carter, Balkema, Rotterdam, 445-468

Poulus, H.G. (2001). Pile Raft Foundations: Design and Applications. Geotechnique 51, No 2, pp 95-113.

Poulos, H. G. (2001). Methods of analysis of piled raft foundations. A report prepared on behalf of technical committee, TC18 on piled foundations, International Society of Soil Mechanics and Geotechnical Engineering.

Prakoso, W. A. and Kulhawy, F. H. (2000). Contribution to piled raft foundation design. Jnl. Geot. and Geoenv. Eng., ASCE, 127(1): 17-24.

Randolph, M. F., & Wroth, C.P. (1978). Analysis of deformation of vertically loaded piles. Journal Geotechnical Engineering Div, ASCE 104(12): 14651488.

Randolph, M. F. (1994). Design methods for piled groups and piled rafts. Stateof-the-art report. Paper presented at the 13th International Conference Soil Mechanics and Foundation Engineering, New Delhi, 61-82.

Richart, Jr., F.R., Hall, Jr., J.R., & Woods, R.D. (1970). Vibrations of soils and foundations. New Jersey: Prentice-Hall, Inc.

Seed, H.B. and Idriss, I.M., 1971, Simplified Procedure for Evaluation Soil Liquifaction Potential, Journal of soil mechanics and foundation, Division, ASCE, vol.97. No.9, 1249 – 1273.

Soebowo, Eko., Adrin Tohari, dan Dwi Sarah. 2007. Studi Potensi Likuifaksi di Daerah ona Patahan Opak Patalan-Bantul Yogyakarta.

Tan, Y.C., & Chow, C.M. (2004). Design of piled raft foundation on soft ground. Thaher, M., & Jessberger, H. L. (1991). The behaviour of pile-raft foundations, investigated in centrifuge model tests. Centrifuge 91, Boulder, Colorado, pp. 101-106.

Thaher, M., & Jessberger, H. L. (1991). Investigation of the behaviour of pile-raft foundations by centrifuge modelling. Proc. 10th European Conference on Soil Mechanics and Foundation Engineering, Vol. 2, pp. 597-603.

Viggiani, C. (2001). Analysis and design of piled foundations. 1st Arrigo Croce Lecture, Rivista Italiana de Geot., 1/2001: 47-75.

http://www.strongmotioncenter.org/cgi-bin/CESMD. accessed November 10, 2015.

http://www.vsi.esdm.go.id.accessed November 2, 2015.

Refbacks

  • There are currently no refbacks.


Bookmark and Share