ANALYSIS ON VIBRATION MONITORING AT MRT INFRASTRUCTURE
CONSTRUCTION SITE
MOHAMAD TAUFIK BIN TUMIRAN
A project report submitted in partial
fulfilments of the requirement for the award of the
Master of Science in Railway Engineering /
Centre for Graduate Studies
Universiti Tun Hussein Onn Malaysia
JANUARY 20 1 5
ABSTRACT
The study focused on monitoring the level of Peak Vertical Vibration Velocity,
mmls at one axis, and was conducted at the Bukit Bintang MRT Station and Kajang
MRT construction. Polytec Laser Doppler Vibrometer (LDV) was used to measure
the level of vibration during construction operation. The collaboration with the
government local authority such as Land Public Transportation Commission (SPAD)
and the project owner MRT Corp itself has helped the studies conducted
successfully. Data obtained were analyzed on different sources of vibration which is
from ambient, normal excavation, deep excavation and boring works and all data
was taken within 25m away from the sources of the vibration. The result from the
field measurement by different type of machines have been compared Eurocode 3
and DOE Malaysia. According to recommended limit for structural damage based on
Eurocode 3, the safety distances for Bauer BG 28, Komatsu PC200, Liebherr HS 855
HD Litronic, and Sumitomo SH120-3 with TB220 attachment in residential area are
177 m, 15 m, 7 m, and 19.7 m away from the source or receiver. While in
commercial land use, it is predicted to be 25 m, 5.3 my 1 m, and 3.4 m respectively.
However, DOE guidelines have lower structural damage criterion if compared with
Eurocode 3 whereas the recommended limits for damage risk in buildings from
steady state vibration only gave the range of frequency and the safety parameters.
For human response and annoyance criterion, it seems the use of Bauer BG 28
generates the highest vibration which could discomfort the environment. Based on
DOE guideline, the limit for residential area was between 1.2 mm/s to 2.2 mmls,
while for commercial use was between 2.2 mmls to 2.9 mm/s respectively. The
predicted safety distance from the finding was between 342 m to 2.1 km away from
the receiver. While the assessment based on Eurocode 3 found that the use of Bauer
BG 28 must be at least separated at 1.2 km away for the construction period less than
6 days.
ABSTRAK
Kajian ini menumpukan terhadap pemantauan tahap getaran menegak puncak,
didalam unit mmls pada satu paksi. Kajian ini telah dijalankan di Stesen MRT Bukit
Bintang dan kerja pembinaan MRT Kajang. Polytec Laser Doppler vibrometer
(LDV) telah digunakan untuk mengukur tahap getaran semasa operasi pembinaan.
Kerjasama dari pihak berkuasa tempatan seperti Suruhanjaya Pengangkutan Awam
Darat (SPAD) serta pemilik projek sendiri, MRT Corp telah banyak membantu
kajian ini dijalankan dengan jayanya. Data getaran yang dikumpul adalah daripada
pelbagai faktor penghasilan getaran daripada keadaan sekeliling, kerja penggalian
normal, kerja penggalian dalam dan proses penggalian lubang. Kesemua data
tersebut telah dicerap sejauh 25 m d d i punca penghasilan getaran. Kesemua data
telah dibandingkan dari perspektif Eurocode 3 dan Jabatan Alam Sekitar Malaysia.
Menurut had yang disyorkan untuk kerosakan struktur berdasarkan Eurocode 3, jarak
keselamatan untuk Bauer BG 28, Komatsu PC200, Liebherr HS 855 HD Litronic,
dan Sumitomo SH120-3 cantuman TB220 di kawasan kediaman adalah 177 m, 15 m,
7 m, dan 19.7 m dari sumber getaran. Sementara kawasan komersial diramalkan
menjadi 25 m, 5.3 m, 1 m, dan 3.4 m masing-masing. Walaubagaimanapun, garis
panduan DOE mempunyai kriteria kerosakan struktur lebih rendah berbanding
dengan Eurocode 3. Untuk kriteria kegusaran dan respon manusia dan, didapati
penggunaan Bauer BG 28 menjana getaran yang tertinggi yang boleh menghasilkan
ketidakselesaan pada kawasan sekeliling. Berdasarkan garis panduan DOE, had bagi
kawasan kediaman adalah di antara 1.2 mmls kepada 2.2 mmls, rnanakala bagi
kegunaan komersial adalah di antara 2.2 mmls kepada 2.9 mmls. Jarak keselamatan
yang diramalkan adalah antara 342 m sehingga 2.1 km dari penerima. Walaupun
penilaian berdasarkan Eurocode 3 mendapati bahawa penggunaan Bauer BG 28
harus sekurang-kurangnya dipisahkan pada jarak 1.2 km jauh bagi tempoh
pembinaan kurang dari 6 hari.
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