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Re: Fwd: Structural Systems

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Hello Wajahat,

Steel columns might work beautifully, if they are sized
correctly.  You could use concrete piers, too.

Shotcrete usually isn't used with forms like "poured" or
placed concrete is.  Shotcrete is shot out of a hose against
the wall.

How close is the neighboring  building? 1 meter? 10 cm?
Do you have room for the retaining wall footing?  Do you
have experience with digging in the soil in this area?  Will
the soil "stand" on it's own when a trench is cut into it? Or
does it slump into the trench?

Thank you,
Lloyd Pack, P.E.
Advantage Consulting Engineers

On 9 Apr 2013 at 13:12, Wajahat Nassar wrote:

> Hi Lloyd,
> The basement is 9 ft tall, with an 18 inch total raft. I don't have
> the soil pressures for now, perhaps you could guide on that. The
> basement is not excavated as of yet, so I don't know the type and the
> saturation of the soil.
> Yes, the problem is how to protect the neighboring buildings falling
> into the hole.  How would the buildings be braced with minimal cost
> and disturbance. I thought of steel bars embedded into the soil
> structure underneath the foundation of the adjacent building.
> the building is in Lahore, Pakistan. We will install the basement
> floor slab immedately after the concrete for the walls. the walls
> would be shotcreted, forms placed and filled with concrete.
> Thank you
> Regards,
> Wajahat

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