Dalam dekad kebelakangan ini, keadaan ibu negara Malaysia, Kuala Lumpur
telah berkembang pada kadar yang tinggi. Ini telah membawa kepada pelbagai kekangan
kepada reka bentuk struktur seperti kekangan ruang dan kekangan trafik. Model tanah
juzukan - Model Mohr Coulomb juga dikenali sebagai model yang paling lazim di dalam
kalangan jurutera, bagaimanapun, ia kemudian terus membuktikan bahawa linear elastik
dan sempurna plastik model - Model Mohr Coulomb tidak dapat mewakili tindak balas
tanah sebenar secukupnya terutama dalam kes-kes yang melibatkan pengurangan tekanan
berkesan min atau mobilisasi kekuatan ricih seperti penggalian atau projek pembinaan
terowong. Tujuan utama kajian ini adalah untuk menentukan satu pangkalan data untuk
parameter reka bentuk Model Pengerasan Tanah di Formasi Bukit Kenny. Dalam kajian ini,
tindak balas tanah sebenar di Formasi Bukit Kenny telah digunakan sebagai rujukan untuk
dibandingkan dengan tanah simulasi. Parameter kekuatan dan kekakuan tanah di Formasi
Bukit Kenny kemudian ditentukur untuk menghasilkan pelbagai parameter input reka
bentuk untuk Model Pengerasan Tanah dengan simulasi berangka daripada perisian
PLAXIS 2D. Ia didapati bahawa Model Pengerasan Tanah dapat mewakili tindak balas
tanah sebenar lebih baik daripada Model Mohr Coulomb. Ini adalah kerana ciri-ciri
kekukuhan yang mempertimbangkan tekanan di Model Pengerasan Tanah. Walau
bagaimanapun, parameter Model Pengerasan Tanah adalah lebih rumit daripada yang
mudah linear elastik sempurna plastik – Model Mohr Coulomb. Model Pengerasan Tanah
memaparkan sejumlah 10 parameter dan sangat terkenal kerana kekakuan yang
mempertimbangkan tekanan. Di akhir kajian ini, parameter tanah Model Pengerasan Tanah
di Kenny Hill Formation telah ditentukur dan menghasilkan pangkalan data.
_______________________________________________________________________________________________________
In recent decades, the capital state of Malaysia, Kuala Lumpur has been developing
at a high rate. This has led to multiple constraints to the design of the structure, typically
the space constraint and the traffic constraint. The soil constitutive model – Mohr
Coulomb Model is also known as the most prevalent model among the practicing
engineers, however, it is then further proven that a linear elastic and perfectly plastic Mohr
Coulomb Model cannot represent the real soil behaviour adequately especially in the cases
involving reduction of the mean effective stress or mobilization of shear strength such as
excavation or tunneling project. This study was aimed to establish a database of design
input parameters of Hardening Soil Model for Kenny Hill Formation. In this study, the real
soil behaviour of soil in Kenny Hill Formation was used as reference soil to be compared
with numerical simulated soil with Mohr Coulomb and Hardening Soil Model. The
strength and stiffness parameters of soil in Kenny Hill Formation was then be calibrated to
establish a range of design input parameters for Hardening Soil Model using numerical
simulation by PLAXIS 2D software. It is found that the Hardening Soil Model able to
represent the real soil behaviour more than the Mohr Coulomb Model. This is because of
the feature of stress-dependent stiffness in Hardening Soil Model. However, the
parameters of Hardening Soil Model are much more complicated than the simple linear
elastic perfectly plastic Mohr Coulomb Model. Hardening Soil Model features a total of 10
parameters and it is very renowned due to stress-dependent stiffness. In the end of this
study, the parameters of Hardening Soil Model of soil in Kenny Hill Formation were
calibrated and a database is established.
Strength and stiffness parameters of hardening soil model for kenny hill formation / Hew Tau Yan