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Diaphragrm Wall

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stattik123

Structural
Sep 29, 2014
13
Is it possible when using a permanent diaphragm wall to retain soil and as a basement wall, can columns from the superstructure be place on top of the diaphragm wall to support the building load?
 
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In short: yes. As long as you've you've covered your bases in terms of engineering and durability, you can do pretty much anything. That being said, what you've proposed is rare and it deserves careful study. You'll need a durable and convincing load path for both vertical and lateral loads.

I asked a related question previously that may be of interest to you: Link.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
 
I have done a couple. You need to make sure you have the soil capacity at the base for the superstructure loads, and of course the structural capacity in the wall itself. Also the ones I have done always have the center line of the wall eccentric to the superstructure columns so I had to provide cap beams to transfer the load back into the wall. But can and is done without too much trouble
 
What type of retaining wall would be recommended for partial basement on a slope land with a high water-table and also have neighboring building next to it ?
 
@stattik: how close to the property line are you?

@Dcarr: how does one get the membrane etc on the exterior of the diaphragm wall in this situation? Segmental blind side of some sort?

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
 
The wall itself does 98% of the work keeping the water out. On a couple of Projects (40 to 50ft deep with about 25ft of head above bottom of cut) we had a low capacity drainage system on the inside face of the wall. There was the diaphragm wall then waterproofing/drainage and then an interior finish wall. Works well except for the end of one floor where the contractor forgot the waterproofing/drainage. In that place some water gets to the interior but it is a parking garage so the owner didn't mind.
 
Neat. Is there always an interior finish wall? Is that concrete or something lighter?

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
 
Intereior wall is typically Shotcrete. The walls were not truly diaphragm walls, but secant piers walls.
 
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