24
Dec

Pendidikan untuk Kemajuan Indonesia

Written by Gouw Tjie Liong. Posted in GTL Interviews, Publication

Manfaatkan dan tingkatkan mutu pendidikan demi kemajuan Indoensia, sebuah wawancara Gouw dengan majalah Konstruksi tahun 1997, lengkapnya bisa dibaca dengan klik link ini: konstruksi-253-mutu-pendidikan-utk-kemajuan-indonesia-1997a

13
Jan

Effect of Pile Cap Thickness and Magnitudes of Lateral Movement on Laterally Loaded Group Piles

Written by Gouw Tjie Liong. Posted in GTL Paper, Publication

ABSTRACT: The capacity of laterally loaded group piles are conventionally analyzed by simply reducing the lateral subgrade reaction of the soil, kh. The lateral subgrade reaction is reduced to 0.35 kh, when the piles center to center distance is at 3 pile diameter and linearly increases up to 1.0 kh when the piles center to center distance is equal or higher than 8 pile diameter. It seems there is no consideration to the thickness of the pile cap and magnitude of lateral movement of the piles on this conventional approach. By using 3D finite element geotechnical software, the effect of these two factors can now be investigated. This paper presents the study on the impact of those two factors on lateral capacity of group piles. The study reveals that when base friction of the pile cap and the passive pressure acting against the pile cap is neglected, the effects of the pile cap thickness against group lateral efficiency is marginal and can be safely neglected. The center to center pile spacing and the lateral movement of the piles do play important roles in the capacity of the laterally loaded piles. The greater the pile spacing the greater the lateral group efficiency, so does the lateral movement.

download full paper: http://www.ejge.com/2015/Ppr2015.1320ma.pdf

27
Nov

Seberapa Besar Pengaruh Efek Gangguan dan Hambatan Alir pada Prefabricated Vertikal Drain ?

Written by Gouw Tjie Liong. Posted in GTL Paper, Publication

ABSTRACT: Sejauh ini teknik perbaikan tanah yang terbanyak diaplikasikan di Indonesia adalah aplikasi vertikal drain untuk meningkatkan kuat geser undrained dan untuk mempercepat penurunan konsolidasi pada tanah lempung lunak. Terdapat banyak makalah-makalah akademis yang mengatakan bahwa efektifitas vertikal drain perlu diperhitungkan terhadap efek gangguan saat pemasangan (smear effect) dan efek hambatan alir (drain resistance). Makalah ini menganalisa dan membahas seberapa besar efek dua faktor tersebut dalam kasus nyata di dua proyek perbaikan tanah di Balikpapan dan Bontang, Kalimantan, Indonesia. Dari analisa data-data penurunan dan monitoring piezometer terlihat bahwa efek gangguan dan efek tahanan alir tersebut dapat dikatakan tidak berarti. Dengan kata lain dalam proyek dengan vertikal drain yang dipasang sedalam 12 dan 27m ini kedua efek tersebut dapat diabaikan.

Download full paper: GOUW-2015-1125-EfekGangguan-HambatanAlir-PVD

Geotechnical Course

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