topik 4 lesson learned - malaysian public works...
TRANSCRIPT
LESSON LEARNED
Ir. Mohd Firdaus bin MohdJurutera AwamBahagian Perkhidmatan Forensik StrukturCawangan Kejuruteraan Awam & StrukturIbu Pejabat JKR Malaysia
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
RUNTUHAN BUMBUNG STADIUM
Runtuhan bumbung Stadium SultanMizan, Terengganu pada 2008
Runtuhan perancah semasa kerjapembaikan di stadium yang samapada 20 Februari 2013.
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
RUNTUHAN SILING PEJABAT
Kejadian pertama runtuhan silingbumbung di Blok A, Ibu PejabatSPRM Melaka pada Ogos 2013.
Kejadian kedua runtuhan siling bumbungpada lokasi yang sama di Blok A, Ibu PejabatSPRM Melaka pada September 2015.
Kejadian ketiga runtuhan silingbumbung pada lokasi yang sama di Blok A, Ibu Pejabat SPRM Melaka pada Ogos 2016.
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Runtuhan gable-end wall DewanSerbaguna Kolej Tunku Kurshiah,Bandar Enstek, Negeri Sembilan pada16 Oktober 2014
Runtuhan merosakkan kedai koperasi &bilik yang menyimpan peralatan muzik.Kerugian dianggarkan lebih RM1.4 juta.
RUNTUHAN DINDING DEWAN
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
RUNTUHAN BUMBUNG KAFETERIA
Runtuhan bumbung di Kafeteria IbuPejabat Bomba & PenyelamatMalaysia, Negeri Kelantan pada 21Oktober 2015
Sisa runtuhan kekuda cold-formed,penutup bumbung (concrete tiles) dansiling (fixed ceiling).
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Runtuhan kekuda bumbung VelodromeNasional Malaysia, Nilai ketikapembinaan pada 18 Jun 2016
Kekuda bumbung menghempap krenmudah alih yang berada di ruang dalamvelodrome.
RUNTUHAN KEKUDA VELODROME
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Penutup & kerangka bumbungMahkamah Pasir Mas tercabut akibattiupan angin pada 22 Ogos 2016
Serpihan penutup bumbung (metal deck)di kawasan parkir Hakim / PegawaiMahkamah
RUNTUHAN BUMBUNG MAHKAMAH
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RUNTUHAN SILING KLINIK
FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Runtuhan siling di Kaunter KaunselingPemakanan, Klinik KesihatanMahmoodiah, Johor Bahru pada 06September 2017
Gantungan siling plaster pada mainrunner siling gantung sedia ada
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Keretakan lentur & ricih pada hampirkeseluruhan rasuk di Blok A3, SekolahKebangsaan Tagasan, Semporna,Sabah
Keretakan ricih pada rasuk di DewanTerbuka sekolah
KEGAGALAN STRUKTUR SEKOLAH
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
KEGAGALAN STRUKTUR SEKOLAH
Regangan pada dinding & rasuk bumbungBlok Tadika, Sekolah Kebangsaan SeriMaamor, Batu Pahat, Johor
Kegagalan rasuk konkrit bumbung
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Kualiti bahandiragui
Tidak mematuhilukisan pembinaan
ISU YANG BOLEH
DIELAKKAN
Kelemahankawalan kualiti
pembinaan
Kekeliruanperincian /
lukisan
KECACATAN / KEGAGALAN / KERUNTUHAN
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
KAJIAN KES Keruntuhan Kekuda Bumbung Ketika PembinaanVelodrome Nasional Malaysia
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Kejadian berlaku pada 18 Jun 2016 (Jam lebih kurang 3.00 petang)
Keseluruhan sembilan (9) kekuda keluli bumbung runtuh setelah pemasangan
Runtuhan merosakkan struktur konkrit (in-situ & pra-tuang) dan beberapa kren mudah alih
Panjang rentang kekuda: 88.0 m
Tinggi kekuda: 1.70 m hingga 4.0 m
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
1. MAIN TRUSS
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
End Truss
* MT : Main Truss
MT1 : TRUSS T2
MT2 MT5- : TRUSS T3
MT6 : TRUSS 3A
MT7 MT9- : TRUSS T3
Keadaan 9 kekuda utama yang runtuh di tapak
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
MT2
MT1
MT3
MT4
MT5
MT6
MT7
MT8
MT9
Kedudukan 9 kekuda utama yang runtuh seperti dalam Lukisan Pembinaan
MT1
0
MT1
1
MT1
2
MT1
3
MT1
4
MT1
5
End
Trus
s
End
Trus
s
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Keratan tipikal jenis kekuda utama (Truss T2)
Keratan tipikal jenis kekuda utama (Truss T3)
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Keratan tipikal jenis kekuda utama (Truss T3A)
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
2. FRAME TRUSS&
BRACING TRUSS
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
MT2
MT1
MT3
MT4
MT5
MT6
MT7
MT8
MT9
Section B-B
Section C-C
Section A-A
Kedudukan frame truss & bracing truss seperti dalam Lukisan Pembinaan
MT1
0
MT1
1
MT1
2
MT1
3
MT1
4
MT1
5
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Frame Truss (TT1, TT2)
MT6
MT7
MT8
MT9
MT1
0
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Frame Truss (TT2)
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Bracing Truss (T4)
MT6
MT7
MT8
MT9
MT1
0
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
3. PRECAST CONCRETE COLUMN
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Selepas runtuhan:
Kedudukan 10 tiang konkrit pra-tuangtermasuk Tiang C9 yang tumbang. Terdapat perubahan rekabentuk padakesemua tiang tersebut (enlargement)
Sebelum runtuhan:
Keadaan Tiang C9 sebelumruntuhan
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
MT2
MT1
MT3
MT4
MT5
MT6
MT7
MT8
MT9
Kedudukan 9 kekuda utama yang runtuh seperti dalam Lukisan Pembinaan
MT1
0
MT1
1
MT1
2
MT1
3
MT1
4
MT1
5
End
Trus
s
End
Trus
s
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PUNCA UTAMA RUNTUHAN
FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
1. Sequential Erection Procedure Yang Tidak Dipatuhi
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
LIFTING &
RIGGING???
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
MT2
MT1
MT3
MT4
MT5
MT6
MT7
MT8
MT9
Kedudukan 9 kekuda utama yang runtuh seperti dalam Lukisan Pembinaan
MT1
0
MT1
1
MT1
2
MT1
3
MT1
4
MT1
5
End
Trus
s
End
Trus
s
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
ERECTION SEQUENCES
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
PC Column
ERECTION SEQUENCES
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
PC Beam
ERECTION SEQUENCES
PC Column
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
PC BeamPC Column Frame Truss(TT1 & TT2)
ERECTION SEQUENCES
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
PC BeamPC Column
ERECTION SEQUENCES
Frame Truss(TT1 & TT2)
Bracing Truss(T4)
Missed
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
PC BeamPC Column Main Truss(T3 & T3A)
ERECTION SEQUENCES
MT6
MT7
MT8
MT9
MT1
0
Frame Truss(TT1 & TT2)
Bracing Truss(T4)
Missed
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Tiada Bracing Truss T4 yang dipasang
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Tiada Bracing Truss T4 yang dipasang
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
MAIN CONTRACTOR
DESIGN ENGINEER
ERECTION ENGINEER
FABRICATOR
???
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PUNCA UTAMA RUNTUHAN
1. Sequential Erection Procedure Yang Tidak Dipatuhi
FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
2. Temporary Props
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Temp Props
Hanya empat (4) temporary props yang disediakan semasa pemasangan kekuda
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIAYou created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com)
PUNCA UTAMA RUNTUHAN
1. Sequential Erection Procedure Yang Tidak Dipatuhi
FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
2. Temporary Props
3. Kelemahan Pengawasan & Kawalan Kualiti Kerja
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
ERECTION SEQUENCES
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Top Chord
Top Chord
Bottom Chord
Bottom Chord
Frame Truss TT1Column C9
Embedded length bagi anchor bolts adalah berbeza-beza – meragukan Bahan grouting / adhesive tidak memuaskan (bukan shear @ pull-out tetapi slippage failure)
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
Pratuang
In-situ
Kaedah column enlargement meragukan – kegagalan ikatan antara pc column dengan in-situ column (clean surface)
In-situ
PC
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
WHEN YOU REPEAT A MISTAKE, IT IS NOT A MISTAKE ANYMORE
“ IT IS A DECISION “
- Paulo Coelho-
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FORENSIK STRUKTUR / JABATAN KERJA RAYA MALAYSIA
TERIMA KASIH
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