Al Muhandis Notes...

Engineers are to be more creative, innovative, and should be able to think out of the box. Vast Paradigm Shift is urgently required in order to accommodate for so called “Fast Track project” in construction industry in Malaysia. Conventional methods of construction need to change. Cast in situ method which required longer time, more manpower and large amount of material wastage need to be re-examine. Only unwise engineer will design for cast in situ for structure above busy expressway at Station 3. If I’m the client, the designer will be penalize for providing me “non-construct-able” design. Common laa… please visit the site and see how congested are the area, good engineer is not only be able to produce safe design but workable design. Go Pre-cast and all the problems resolve...Insyaallah.

Construction of P112, the most problematic area at the median of FHR2 begins. 16 numbers of 1.5m diameter bored pile was designed to support 20m high “Vertical Prestress Integrated Pier”. This Pier is designed to support 65-100-65m Special Crossing Span which is considered the longest Elevated Structure using Precast SBG in Malaysia.

Foundation for P112 is as below:

16 x 1500mm diameter Bored Pile
Bored Length: 70m including 2m rock socket
Piling Rig : BG40 (Biggest Piling Rig - can drill up to 70m deep)
Start Date : Saturday 1^st September 2012

Press Release on 16 July 2012
Traffic Diversion from 15 July 2012 to 31 March 2013

Piling Record for P112:

1st Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
2nd Pile : start : 8/9/12 finish : 10/9/12 (Pile No. 5)
3rd Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
4th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
5th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
6th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
7th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
8th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
9th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
10th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
11th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
12th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
13th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
14th Pile : start : 1/9/12 finish : 3/9/12 (Pile No. 7)
15th Pile : start :

Risk Assessment for Construction of P112

Related Documents
1)        Piling Layout - Construction Drawing No 2022 Rev.2 dated 25/1/2012
2)        Method Statement Rev. 2 dated 16/12/2011
3)        TMP dated 20/2/2012
4)        ICE Report Volume 1

Work Permit

1) MC to obtained work permit from local authority
2) Press release on 16/7/12

Traffic Management Plan (TMP)
1)        Based on TPM dated 20/2/2012
2)        Actual Implementation date
3)        Joint Inspection / Safety Audit

Utilities

1)        Piloting for underground utilities
2)        Overhead utilities
3)        Drainage system
4)        Confirmation on the HDD cables

5) Removal of Street Lighting/landscaping trees

Bored Piling Works (16 x 1.5m diameter x 65m depth max)

1)        Survey works
2)        Pegging of piling point
3)        Settlement monitoring/base line – survey point/inclinometer
4)        Mobilization of piling rig and other machineries
5)        Stable working platform
6)        Temporary casing – suitable casing length
7)        Drilling work-appropriate drilling tools, Kelly bar length, drilling fluid
8)        Reinforcement – T40, prefabricated
9)        Installation of sonic logging pipe
10)      Determination of rock level and pile toe level
11)      Concreting - 120m3/pile @ 24 trucks. Supplier/back-up suppliers
12)      Continuation of concrete supply. Concrete workability- cement additive
13)      Theory and actual concrete volume graph for each pile
14)      Fall of tremie pile during concreting
15)      Damage of sonic logging pipe
16)      Flushing during concreting – waterway/ earth bund/temp drain
17)      Extracting of temporary casing
18)      Sonic logging test/PDA test
19)      Extra precaution during working at night/raining day
20)      Total concrete volume for bored pile : 120m3 x 16 : 1920 m3

Pile Cap Construction (Type M: 13.35m x 13.35m x 3.0m depth)

1)        Settlement monitoring/base line – survey point/inclinometer
2)        Installation of sheet pile cofferdam
3)        Excavation works - Installation of Struts and Waler
4)        Excavation to pile COL/Pile hacking
5)        Fixing of pilecap reinforcement
6)        Concreting – 550m3 @ 110 trucks
7)        Concrete temperature monitoring
8)        Concrete supplier/backup
9)        Total concrete volume for pilecap : 550m3

Issues raised during MC/Authority Meeting:

•          Works Permit
•          TMP
•          Press Release
•          CAR Insurance
•          Utilities Services
•          Flood Light
•          Thermal Plastic Road Marking
•          Settlement Monitoring
•          Tow Truck on standby
•          Median Opening for Contra Flow (for emergency case)
•          Fortnightly Progress Report
•          Construction duration approximately 8 months (July 2012 to March 2013)

Others Issues:

•          MC to submit Revised Method Statement
•          MC to submit Revised WP
•          MC to comply with ICE report