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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