₦airaland Forum

Good Evening Distinguished Ladies And Respected Gentlemen.


Introducing To You; SOLOMON'S COURT'S


With Gratitude To God Almighty, It Is My Uttermost Pleasure To Bring To You The Construction Diary Of This Epic Project.


DEVELOPERS: CONCRETE GRIDS LTD

SUPERVISING SUB-CONTRACTORS : GOZOK ENGINEERING SERVICES LTD.

FINANCIERS: SHELL COOPERATIVE & THRIFTY SOCIETY ( COOPLAG)

LOCATION: SURULERE, LAGOS NIGERIA.


KEY FEATURES :

1) 3 Bedroom All Ensuite With 4 Bathrooms

2) 11 Flats In One Unit.

3) LIFT

4) Spacious Parking Lot On The Ground Floor

5) State Of The Art Swimming Pool

6) Fully Servised Apartments.


I Will Be Updating The Construction Sequence For Block 3 & 4 On This Thread......Subsequent Threads Will Cover blocks 2 & 1


We Are Already 3 Months Gone On This Project,....Will Bring Us Up To Speed On Block 3 To The Current Phase Of the Project,........And Then Daily Updates Will Follow.

KINDLY STAY TUNNED!!





GOZOK...



Modified:

Soil investigation in pictures


5 CPT and 3 boreholes to ascertain soil bearing capacity and ultimately design for pile service load

3D model





Copy right: CGL LTD



Modified: Will post the revised drawing on the cause of this thread.

Design was received and approved 3 months ago



Now to the action





We decided to use PERCUSSION MACHINE for the PILLING operation.

Following
I love massive projects

chelseamann:
Following
I love massive projects

Thank you sir,... stay tuned.

Pilling operation in pictures:



** Diameter of Pile = 450mm

** Depth of Pile = 14m

** Total number of piles in Block 3 = 124



2 percussion rigs was employed for block 3 averaging 4 to 6 piles daily.

Duration of pilling was approximately 30days from date of commencement.

Pile Integrity Test;


At the completion of pile installation, PIT was conducted on all installed piles to ascertain:

1) Continuity

2) Defects such as cracks, necking and soil inclusion

3) Change in cross section

4 ) Approximate pile length

Based on the result from the PIT 2 piles was recommended for Pile Load Test.


I will break down the Pile load test procedure subsequently,... let's have a look at pictures for the PLT

Pile Load Test on Block 3 trial Pile Cap In Pictures:

Weldone

Larwin:
Weldone

I appreciate it sir...

Now to the PLT summary:

Design servce load on pile = N340KN


Geotechnical Engr tested using ultimate limit state as per the standard. A factor of 1.5 of service load. That will come to 510KN. ( as engrs we are concerned with applying factor of safety, this superceeds serviceability limit state). In a layman's terms we opt for the worst case scenario.


The loading system is applied in increments of 25% at every Loading and Unloading Cycle over a period of 12hrs.




Outcome :


** After PLT procedure, settlement on trial pile was far less than 10% of the nominal pile diameter.


Verdit:

Pile ok


** A confirmatory PLT was equally conducted which came to the same outcome.


What this implies is that we have APPROVAL from the Geotechnical engr to proceed with laying of pile caps and other foundation operations.

This Project follows a standard construction ssequence and methodology.


Next operation:

1) Excavation to required level


2) Blinding


3) Pile cropping preparatory to pile cap reinforcements arrangements.




Pictures

More updates for this project coming tomorrow......stay tunned.


Also new thread for block 2 coming

Excavation and pile cropping contd...

Pile caps reinforcements arrangements...

[quote author=Procontractor post=130560061]Pilling operation in pictures:



** Diameter of Pile = 450mm

** Depth of Pile = 14m




What influence your decision in putting your piles at 14m. The geotechnical report? Can you share more light on the geotechnical result?

[quote author=Larwin post=130605614][/quote]Yes. The Geotechnical report recommended a depth of 14m,....this report is always forwarded to the Structural Engineer for Structural analysis and design of the building. So ultimately the Structural Engineer will design based on the recommendations from the Geotechnical report.


Let me further break it down:

After soil investigation the key data to be provided by the Geotechnical engineer is as follows:

1) proposed depth of pile

2) proposed diameter of pile

3) proposed service load on pile


In our own case a trial pile was done based on those recommendations, loaded,.. and result compared with the proposed service load to ascertain if there's any difference in theoretical service load provided by the Geotec and actual pile carrying capacity. Results were ok and therefore the Structural engineer proceeded to design with proposed service load. This is a very important process. Subsequently after pile installation confirmatory PLT is done on selected piles.

@ Larwin


Hope I did justice to your question?

Pile caps, foundation beams and starters in pictures...

Pile caps, beams and starters...

Formwork to beams and starters...


Mechanical and electrical sleeves..

Procontractor:
@ Larwin


Hope I did justice to your question?

👌👌👌👌

Casting of foundation...

Blinding, mechanical works

Oversite Concrete...

Kickers, column reinforcements...

Shuttering of ground floor columns and concrete works... in pictures

Striking of formwork...

Formwork to 1st floor slab and reinforcement works to lift shaft in pictures..

More on 1st floor slab formwork...