15
Nov

Analisa Beban Gempa pada Dinding Besmen dengan Plaxis 2D

Written by Gouw Tjie Liong, Ir., M.Eng, ChFC, PhD. Posted in GTL Paper, Publication

ABSTRAK: Makalah ini menyajikan pemodelan beban gempa dengan menggunakan program elemen hingga Plaxis 2D. Analisa dilakukan dengan pemodelan pseudo-static dan pemodelan analisa dinamik dengan masukan beban dinamis berupa time histories. Hasil analisa ini dibandingkan dengan metoda konvensional yang sering dipakai dalam memperkirakan gaya gempa yang bekerja pada dinding basement, yaitu: metoda Seed-Whitman, metoda Mononobe-Okabe dan metoda Wood yang dihitung secara manual dan dengan bantuan program GEO5. Hasil analisa elemen hingga menunjukkan bahwa beban gempa yang bekerja pada dinding basement lebih tinggi dari metoda Mononobe-Okabe dan Seed-Whitman, namun lebih rendah dari metoda Wood.

download full paper: 20131113-HATTI-PIT2013-GayaGempaDindingBasement-Final

 

 

 

05
Jun

PERFORMANCE OF MICROPILES SUBJECTED TO REPETITIVE LOAD AND UNLOAD CYCLES OF 1500KN LOAD

Written by Gouw Tjie Liong, Ir., M.Eng, ChFC, PhD. Posted in GTL Paper, Publication

Special Lecture at Pile 2013,Int. Conf.  on State of The Art of Pile Foundation and Pile Case Histories, Bandung, Indonesia, June 2-4, 2013.

ABSTRACT: Since early 1980s cast in place micropiles have been implemented in various part of Indonesia. Its main application is to provide support for machine foundation with limited headroom inside a factory, to strengthen a building foundation by underpinning, or to support a structure under a special site condition where the use of traditional driven piles or bored piles was not possible. Three types of cast-in-place micropiles have been implemented elsewhere, i.e. non grouted, globally grouted, and repetitive grouted micropiles. This paper describes the design, construction and performance of Repetitive Grouted Micropiles (RGMs) subjected to loading and unloading cycles of 1500 kN load. The RGMs, which served as a gantry crane foundation, were designed to bear 1000 kN working load each. To check the capacity and the load-unload behavior of the piles, 6 out of 195 used piles were subjected to 20 cycles of loading-unloading between zero and 1500 kN test-load. One unused pile was constructed and loaded to failure. It was found that the piles performed satisfactorily.

Download full paper: GTL-Performance of Micropiles Subjected to Loading and Unloading_Final

05
Jun

THE APPLICATION OF GROUND IMPROVEMENT TECHNIQUES IN INDONESIA

Written by Gouw Tjie Liong, Ir., M.Eng, ChFC, PhD. Posted in GTL Paper, Publication

Keynote Lecture at 18th South East Asian Geotechnical Conference – May 31, 2013.

ABSTRACT: Ground improvement technologies have played an important role in mitigating both settlement problem of highly compressible soft marine clay and liquefaction potential of loose sandy soils that lie along the coastal regions in Indonesia. This paper elaborates the authors’ experiences in applying ground improvement technologies in various part of Indonesia. Case studies on conventional precompression with vertical drain, vacuum preloading, dynamic compaction, and vibro-compaction are presented. Finally, the handling of problematic shale formation is also discussed.

Download full paper: GTL-18SEAGC-356-Ground Improvement in Indonesia

 

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