17
Mar

Notes on The Application of Spring Constant and Soil Structure Interaction Problem

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

ABSTRACT: Despite the advancement of the computer technology and engineering software, which allows soilstructure interaction to be analyzed economically, the concept of spring constant is still widely used inanalyzing raft and pile raft foundation. This paper first reviews the spring constant concept, itslimitation and the misused of the value in evaluating building foundation. Finally, a case study on abuilding, soil and tunnels interaction is given as an example of solving a soil structure interactionproblem by using geotechnical finite element software.

full paper can be downloaded at: 010307-Spring Constants & SSI_2001

17
Mar

Soil Stiffness For JAKARTA Silty And Clayey Soils

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

ABSTRACT: The upper layer of Jakarta soil is mostly silty and clayey types, which is very compressible and very sensitive to the loads applied that could caused damages to the building. These problems are usually not caused by the strength but more on the deformation properties of the soil. This research is aim to help the engineers in predicting the soil deformation modulus by getting the right E-value from an empirical correlation.

In this research, data are collected from the soil investigation companies in Jakarta. The excel spreadsheet program was used in data processing and also to develop the correlation to find the E-value. At the end of the research the relevant conclusion were drawn to get the proposed correlation between E vs N value and E vs PI.

full paper: Soil Stiffness For Jakarta Silty and Clayey Soils

17
Mar

Teknik Uji Non Destruktif Untuk Mendeteksi Integritas Pondasi Tiang

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

ABSTRACT: Non destructive testing on piles can be divided into two main categories. The first category is to find out the integrity of the piles, such as Pile Integrity Testing (PIT) and Sonic Logging. The second category is to find out the pile capacity, such as Dynamic Load Testing / Pile Driving Analysis. Since the early 1990s, the application of the above tests has been brought into practice and has been gaining its popularity in Indonesia. However, the basic theory behind the testing has not been widely disseminated. This paper tries to elaborate the first category of the testing, i.e. the Pile Integrity Testing and Sonic Logging. The basic theory, the advantages and disadvantages, the application, the limitation and the interpretation of those techniques shall be discussed.

full paper: Teknik Uji Non Destruktif untuk Mendeteksi Integritas Pondasi Tiang

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

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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