03
Oct

Mengapa timbul permasalahan dalam bangunan geoteknik?

Written by Gouw Tjie Liong, Ir., M.Eng, ChFC, PhD. Posted in Geotechnic, News and Opinion

Permasalahan yang dihadapi oleh para engineer adalah bukan hanya terletak pada kenyataan bahwa tanah itu merupakan material particulate yang lebih kompleks daripada beton dan baja, tetapi terutama sekali terletak pada kurang “menghormati” sang tanah. 

Tanah perlu dimengerti dan diperlakukan dengan baik, sebagaimana kita berusaha mengerti dan memperlakukan seorang ibu (wanita). Dalam hal geoteknik, ada empat aspek yang sangat perlu dicari tahu dan dimengerti:

– Profil tanah (jenis dan distribusinya)

– Letak muka air tanah (ada tidak adanya aliran air tanah, perched water table, ataupun artesian water table.)

– Prilaku dari jenis tanah yang dihadapi

– Pemodelan tanah yang tepat untuk mendesain bangunan geoteknik yang direncanakan.
Untuk itu semuanya tentu perlu uang, perlu investasi waktu. Coba tanya kepada para pemilik modal, bila mereka sangat “pelit”, apakah waktu mereka mengejar istri istri mereka mereka tidak perlu uang dan tidak perlu waktu (ha ha ha…)? Tanah juga perlu diberi modal, dan dimengerti prilakunya.
Bila kita mengerti empat hal tsb, maka “kenikmatan” menjadi milik sang engineer dan tentunya the ultimate owner and users of the construction.
Bila sebaliknya memperlakukan sang tanah asal-asalnya, sebagaimana memperlakukan anak tiri, maka tunggulah “pembalasan” sang anak tiri. Tidak percaya? Lihat kegagalan menara Sano di Pluit tahun 1991, lihat sekarang meara Saedah (?) yang telah selesai dibangun namun tak layak huni, lihat keruntuhan Nicoll highway di Singapore. Dan banyak lagi, yang karena tidak mau mengerti atau “tidak perduli” dan “tidak mau tahu” dan tahunya hanya “hemat hemat dan hemat” dalam penyelidikan tanah dan “hemat” dalam membayar engineer, akibatnya terjadi pembalasan sang anak tiri yang sangat dahsyat dan sangat merugikan.
Nah…. tell the owner of the money…
TREAT THE SOIL AS A LADY, THEN THE COMFORT IS YOURS.
TREAT THE SOIL AS A STEPCHILDREN, THE REVENGE IS WAITING FOR YOU!!
Perlakukan tanah seperti seorang wanita, maka kenikmatan milikmu.
Perlakukan tanah seperti anak tiri, maka pembalasan menantimu.
13
May

Keynote Lecture at 18 SEAGC – 29-31 May 2013

Written by Gouw Tjie Liong, Ir., M.Eng, ChFC, PhD. Posted in Geotechnic, News and Opinion

Below is the information of the 18th South East Asian Geotechnical Conference which will be held in Singapore on the 29-31 May 2013, where I shall deliver one of the keynote lecture on  The Application of Ground Improvement Techniques in Indonesia

Detail information can be seen at:

http://www.18seagc.com/prog.html#
http://www.18seagc.com/tentative-program.pdf

13
May

Guest lecture at HKUST

Written by Gouw Tjie Liong, Ir., M.Eng, ChFC, PhD. Posted in Geotechnic, News and Opinion

 The Hong Kong University of Science and Technology

Department of Civil and Environmental Engineering

SEMINAR

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

By

GOUW Tjie-Liong, Ir., M.Eng, ChFC

BINUS University

Certified Senior Geotechnical Consultant

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.

 

Date     :    13 May 2013, Monday

Time    :    10:30 am – 11:15 am

Venue  :    Room 3574 (Lift 27/28), Civil Engineering Conference Room

                 The Hong Kong University of Science and Technology

Clearwater Bay, Kowloon

For enquiries, please contact Ms Rebecca Yau at 2358 7164

 

Biography

Mr. Gouw Tjie-Liong is a certified Professional Geotechnical Engineer. He has been working in the field of Geotechnical Engineering since 1984. His expertise covering geotechnical investigation, soil intrumentation, deep foundation and excavation for high rise buildings, pile load testing (Static and PDA), pile integrity testing (PIT), sonic logging test, vibration monitoring, slope stability, ground anchors, pumping test, dewatering, micropiles, tunnelling and ground improvement works, e.g. dynamic compaction, vertical drain, vibro-compaction, geosynthetic and grouting. The jobs cover more than 180 projects in Indonesia, Singapore and Srilanka. He has a great passion in the teaching and disseminating of geotechnical engineering knowledge. He serves as lecturer since late 1984. Currently, he serves as a senior lecturer at Bina Nusantara University, Jakarta, Indonesia. He also conduct regular geotechnical training for engineers.  He chaired the Indonesian Chapter of International Geosynthetics Society since 2006. He has published 64 papers and 22 technical notes.

 * * * ALL ARE WELCOME * * *

Geotechnical Course

  • Soil Mechanis
  • Soil Investigation
  • Foundation Engineering
  • PIT, PDA, Sonic Logging
  • Slope Stabilization
  • Geotechnical Instrumentation
  • Deep Excavation
  • Ground Improvement
  • Geotechnical Instrumentation
  • Earthquake
  • Liquefaction Analysis
  • Application of Geotechnical Software
  • Other Geotechnical Course

Learn more

Motivational Course

  • Cultivating Engineering Judgment
  • The Problem of Engineer
  • How I Present Myself
  • Light Up
  • Toward Successful Engineering Career
  • Pressure lead to Success
  • The Up and Down of My Life
  • Theory of Emptiness
  • Turning Thought into Reality
  • Young Engineer