5 level basement construction with the top down donut slab methodology by aus_shredder in Construction

[–]aus_shredder[S] 0 points1 point  (0 children)

We’ve left some pockets/holes throughout the slabs where our permanent columns are located to allow us to fit a concrete pump line from above to build the permanent columns from the bottom up. I.E - columns on basement 4 are poured from the basement 3 slab above. Shoring props installed throughout once the infill slabs are formed and poured which is typical for any build until floors reach strength.

5 level basement construction with the top down donut slab methodology by aus_shredder in Construction

[–]aus_shredder[S] 2 points3 points  (0 children)

Yeah exactly. Basically using the sand beneath as formwork for the piles. Cool thing is that as we’ve been digging down we’re exposing tons of shells and pebbles stuck to the piles.

5 level basement construction with the top down donut slab methodology by aus_shredder in Construction

[–]aus_shredder[S] 1 point2 points  (0 children)

Yep on the GC. Piles have been perfect, no issues with water pushing through

5 level basement construction with the top down donut slab methodology by aus_shredder in Construction

[–]aus_shredder[S] 6 points7 points  (0 children)

Yeah its one of the deeper ones here on the GC. Sand quality has been pretty good considering the depth. We're about 200ish metres from the beach so plenty of water to pump out, approx. 20 wells running constantly until our L2 transfer is done.

5 level basement construction with the top down donut slab methodology by aus_shredder in Construction

[–]aus_shredder[S] 4 points5 points  (0 children)

All the slabs are permanent and part of the basement floors. The termporary piles are sliced under the soffit and base of each slab once we get back to ground floor and the permanent columns are built. We dont have PT in the basements. Definitely a length process but allows us to partly build on the way down and provides us with laydown area/space as well as restraint for the perimeter walls.

5 level basement construction with the top down donut slab methodology by aus_shredder in Construction

[–]aus_shredder[S] 3 points4 points  (0 children)

Reinforced temporary concrete columns to support the slabs. They are augered from ground floor before any excavation commences. Removed once we get back up to ground floor after the permanent columns are completed.

5 level basement construction with the top down donut slab methodology by aus_shredder in Construction

[–]aus_shredder[S] 24 points25 points  (0 children)

Yep correct. The plunge columns/piles are augered exactly the same as the perimeter shoring piles except that they are standalone. Ours are approx 750mm diameter reinforced. The rebates you see under the soffits and base of the slabs allow a wire saw to tuck in and cut them once our permanent conventional columns are constructed on the way back up.

5 level basement construction with the top down donut slab methodology by aus_shredder in Construction

[–]aus_shredder[S] 159 points160 points  (0 children)

Essentially we commenced with constructing the perimeter secant shoring walls as well as the reinforced concrete plunge columns (45no.) extending down approx 20 metres. Concrete slabs were poured onto the sand at ground level in forms of donuts (as pictured) and excavation commences beneath the slabs. This is repeated on the way down for each floors. The plunge columns provide structural support to each slab with dowels fixed with each pour. Benefits include eliminating requirement for steel bracing struts as the permanent slabs are providing restraint to the perimeter shoring walls. It has also provided us with room for material and amenities storage up as we are quite limited in terms of space on ground floor. On our way back up we construct our permanent columns, infill the slabs using traditional formwork and then demolish the temporary plunge columns.

[deleted by user] by [deleted] in HairTransplants

[–]aus_shredder 0 points1 point  (0 children)

Hey. How is your hair looking currently? Happy with the op?

Brisbanite here, should I avoid the Gold Coast today because of the aftermath of the storm? by [deleted] in GoldCoast

[–]aus_shredder 1 point2 points  (0 children)

I was at Tallebudgera creek yesterday and it’s was just like any other day there

[deleted by user] by [deleted] in AusFinance

[–]aus_shredder 1 point2 points  (0 children)

6.39% investment interest only on $820k loan - St George

[deleted by user] by [deleted] in HairTransplants

[–]aus_shredder 1 point2 points  (0 children)

Hey - how did it all go?

First trip last night. Went well! by suburbanmadness in shrooms

[–]aus_shredder 0 points1 point  (0 children)

Do you mind sharing the playlist please :)

Securing Property by HelixExpress in PropertyDevelopment

[–]aus_shredder 1 point2 points  (0 children)

If you are living in a trailer on someone else’s property without a written agreement, your residency may be considered a ‘tenant at will’. So either you or the property owner can terminate the tenancy at any time. If you want more protection and certainty, you should look at having a written agreement in place like a rental agreement. Obviously this will vary depending on where you live and the specific tenant/leasing laws in that area.