Nak bincang sikit pasal tanah hitam kat tapak.
Macama mana nak tahu dekat kawasan kita nak bina tu ada tanah hitam atau tidak (soalan ni masa belum buat apa2 lg ....kawasan tu masih hutan lagi). Untuk makluman tanah hitam ni kalau kena air ia akan jadi macam bubur. Soalan ni aku tanya sebab ada orang bertanya kenapa you tak detect tanah hitam ni masa u buat SI dulu.
Jawapannya ialah : Ia bergantung kepada jenis SI yang kita buat....kalau kita guna boring dah tentu kita tak akan dapat sample tanah hitam ni, sebabnya ia akan jadi cair. Ia kan keluar ikut air yang di gunakan semasa kerja boring dilakukan lainlah kalau kita guna Auger. Sample tanah hitam boleh diambil guna kaedah Auger ni.
SI juga boleh dilkukan pada setiap 500m interval di bahagian tengah alignment jalan, bagi memastikan data-data SI betul-betul mewakili maklumat di tapak.
SOIL INVESTIGATION
Dalam membicarakan perkara ini amatlah penting bagi kita untuk mengetahui kedudukan sebenar lokasi sebenar SI dilakukan sebelum ini dan maklumat SI berikut sebelum kita melakukan kerja-kerja pembinaan. Contohnya ialah maklumat BH - type of soil, in what depth, N value dsbnya. MP - N value and at what depth. Anda boleh summarry kan maklumat tersebut yang diperolehi daripada construction drawing. Dengan maklumat yang ada dapatlah kita mengawasi tapak dengan jaya nya , especially untuk kerja-kerja Geotechinical seperti ground treatment, kerja jambatan dsbnya.
TECHNICAL TALK -PROBLEM STATEMENT (PUNCHING SHEAR AT BC)
1. Problem Statement (Notification of Defect)
Failure (punching shear) has happened at bottom slab of BC. BC detail as below
a. General
L = 58.65 m
W = 4.3 m
H = 2.4 m
Catchment area - 13 ha
Q from catchment 4.85 m3/s and 5.36 m3/s 50 and 100 years ARI respectively
Max Q for BC - 21.7 m3/s
Thickness of wall and slab - 400mm (Concrete G20, reinforcement T20 main bar at top and Bottom
Concrete cover 50mm accept soffit 75mm.
b. Foundation
Pile bedding (200mm x 200mm RC pile)
Horizontal 1.5 m interval , tranverse 1.7 m interval
Nos of Piles - 108 no ( 3 rows)
Pile Drive to set , 12m length at N50, 2 nos 6m pile (for info 300mmx300mm RC pile and above have 12 m length)
c. Geotechnical
N value range 0-12 at 12 meter depth. Hard stratum at 12 m depth (N50). Max allowable strucral capacity of pile was 450 KN. (PDA test carried out got 900KN).
High of embankment 6.4 m, equal to 122 Kn/m2
Traffic lLoad - 20 KN/m2
2. Solution
From BC change to 2.4 mm dia. RCP (Remove failure BC)
Foundation increase from 400mm to 600mm with craddle (total hight - 1.2 m), width of foundation 4.1 m.
Piling use 200mm x 200mm RC pile 6 m length and drive up to 12 m length - 1.42 interval for tranverse, 1 m interval horizontal.
Reinforcement at bottom slab 4 layer BRC B10 (2top +2bottom)
C0ncrete G20/20 for all
Lean Concrete GH15/20
Failure (punching shear) has happened at bottom slab of BC. BC detail as below
a. General
L = 58.65 m
W = 4.3 m
H = 2.4 m
Catchment area - 13 ha
Q from catchment 4.85 m3/s and 5.36 m3/s 50 and 100 years ARI respectively
Max Q for BC - 21.7 m3/s
Thickness of wall and slab - 400mm (Concrete G20, reinforcement T20 main bar at top and Bottom
Concrete cover 50mm accept soffit 75mm.
b. Foundation
Pile bedding (200mm x 200mm RC pile)
Horizontal 1.5 m interval , tranverse 1.7 m interval
Nos of Piles - 108 no ( 3 rows)
Pile Drive to set , 12m length at N50, 2 nos 6m pile (for info 300mmx300mm RC pile and above have 12 m length)
c. Geotechnical
N value range 0-12 at 12 meter depth. Hard stratum at 12 m depth (N50). Max allowable strucral capacity of pile was 450 KN. (PDA test carried out got 900KN).
High of embankment 6.4 m, equal to 122 Kn/m2
Traffic lLoad - 20 KN/m2
2. Solution
From BC change to 2.4 mm dia. RCP (Remove failure BC)
Foundation increase from 400mm to 600mm with craddle (total hight - 1.2 m), width of foundation 4.1 m.
Piling use 200mm x 200mm RC pile 6 m length and drive up to 12 m length - 1.42 interval for tranverse, 1 m interval horizontal.
Reinforcement at bottom slab 4 layer BRC B10 (2top +2bottom)
C0ncrete G20/20 for all
Lean Concrete GH15/20
Pengiraan Peratus Pertambahan
Asal Baru
60000 100000
Therefore % pertambahan = 100000 - 60000/60000 x 100
= 67%
60000 100000
Therefore % pertambahan = 100000 - 60000/60000 x 100
= 67%
CHECKLIST FOR INDENT – WORKS BELOW RM 20,000.00
1. Get at least 3 quotation from different suppliers/contractor and submit to QS. Before that every contractor must aware that what works and scope they will do. For a better to both party client must give them a clear requirement or scopes for them to submit a clear and better quotation.
2. Inden issued to contractor – Contractor to sign acceptance of Inden and start works within 14 days from the date of Indent. Contractor need to submit work programme, method statement and drawing.
3. Upon completion of works contractor to inform JKR for Join Inspection and approval for completion of works. Contractor to prepare Joint Measurement Shet.
- Contractor to sign part A and C
- JKR to sign part B
4. Complete document such as Joint Mesurement Sheet, Method Statement, Work programme, drawing and Photo send to client .
- Approval from PB and WPP at Remark part.
5. Complete document send to QS for payment process.
Note : All the information is only from my understanding. For more info and true process please refer to the right agency.
2. Inden issued to contractor – Contractor to sign acceptance of Inden and start works within 14 days from the date of Indent. Contractor need to submit work programme, method statement and drawing.
3. Upon completion of works contractor to inform JKR for Join Inspection and approval for completion of works. Contractor to prepare Joint Measurement Shet.
- Contractor to sign part A and C
- JKR to sign part B
4. Complete document such as Joint Mesurement Sheet, Method Statement, Work programme, drawing and Photo send to client .
- Approval from PB and WPP at Remark part.
5. Complete document send to QS for payment process.
Note : All the information is only from my understanding. For more info and true process please refer to the right agency.
LAWATAN KE BUKIT ANTARABANGSA DAN N.SEMBILAN - 2 - 4 NOV 2010
1. Bukit Antarabangsa
Melawat kerja-kerja pembaikan slope yang runtuh. Di mana runtuhan slope di Bukit Antarabangsa yang telah menggemparkan negara Malaysia suatu ketika dahulu yang menyebabkan 14 orang kehilangan nyawa, kerosakan harta benda , rumah berganjak dari keudukan asal dan terputus hubungan darat buat seketika.
Banyak kaedah-kaedah yang berkaitan geoteknikal work diaplikasikan di projek ini, di antaranya guniting, soil nailing, cassion pile, borepile, instrumentation dll. Yang menarik di sini ialah penggunaan cassion pile sedalam -+30m di bahagian tengah dan toe cerun. Cassion pile bertindak sebagai tembok penahan di bahagain bawah tanah. Cassion pile dilakukan secara manual.
2. Seremban Middle Ring Road
Di sini juga dapat dilihat cassion pile digunakan bagi menggantikan borepile.
3. Politeknik Nilai
Di sini mula terfikit nak beli rumah kawasan Bandar Estek untuk buat sewa kat pelajar Politeknik.
Tapi sebelum tu aku nak cerita sikit pasal nak jaga projek ni. Perkara asas yang perlu tahu untuk pantau projek ialah Time, Kualiti dan Kos.
Time
- Pantau kemajuan projek melalui CPM iaitu S curve fizikal, Task, Milestone iaitu tarikh siap.
- Program mingguan dari pihak kontraktor kena ada dan satu lagi pasal skala. Yang ni pun salah satu tool nak pantau projek.
Kualiti
Yang di pantau adalah berdasarkan ISO9000 for kualiti dan prosedur kerja, ISO 140000 for environment dan ISO 18000 untuk safety
Perkara yang dipantau ialah bahan binaan, rekod kualiti, kualiti kerja.
Kos
Monitor melalui S curve financial
Melawat kerja-kerja pembaikan slope yang runtuh. Di mana runtuhan slope di Bukit Antarabangsa yang telah menggemparkan negara Malaysia suatu ketika dahulu yang menyebabkan 14 orang kehilangan nyawa, kerosakan harta benda , rumah berganjak dari keudukan asal dan terputus hubungan darat buat seketika.
Banyak kaedah-kaedah yang berkaitan geoteknikal work diaplikasikan di projek ini, di antaranya guniting, soil nailing, cassion pile, borepile, instrumentation dll. Yang menarik di sini ialah penggunaan cassion pile sedalam -+30m di bahagian tengah dan toe cerun. Cassion pile bertindak sebagai tembok penahan di bahagain bawah tanah. Cassion pile dilakukan secara manual.
2. Seremban Middle Ring Road
Di sini juga dapat dilihat cassion pile digunakan bagi menggantikan borepile.
3. Politeknik Nilai
Di sini mula terfikit nak beli rumah kawasan Bandar Estek untuk buat sewa kat pelajar Politeknik.
Tapi sebelum tu aku nak cerita sikit pasal nak jaga projek ni. Perkara asas yang perlu tahu untuk pantau projek ialah Time, Kualiti dan Kos.
Time
- Pantau kemajuan projek melalui CPM iaitu S curve fizikal, Task, Milestone iaitu tarikh siap.
- Program mingguan dari pihak kontraktor kena ada dan satu lagi pasal skala. Yang ni pun salah satu tool nak pantau projek.
Kualiti
Yang di pantau adalah berdasarkan ISO9000 for kualiti dan prosedur kerja, ISO 140000 for environment dan ISO 18000 untuk safety
Perkara yang dipantau ialah bahan binaan, rekod kualiti, kualiti kerja.
Kos
Monitor melalui S curve financial
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