Trying to avoid expansion joint

[Robbiee]

Hello,
We have a site where we will build 130mx80 one level underground basement/parking garage. There are two concrete 6-storey buildings above the basement that will occupy part of the footprint of the basement and the rest will be used as surface parking area and roads. Please see attached plan.
I have done a number of up to 90m long underground parking garages without expansion joints in walls and slabs with no major cracking issues. This one is 130m long.
The basements under the buildings are heated and the parking area of the basement will be provided with minimum heat to be kept above freezing temperature. We are located in an area that the temperature range from winter to summer is -19C to +31C. According to the Technical report No. 65 "Expansion joints in Building", we are fine without an expansion joint.
To help with shrinkage, we will provide control joints in walls every 7-8m and the slab will be poured with pour strips that will be kept open for 28 days. My questions are:
1- Do we need expansion joints in the walls and slab?
2- If not, any recommendations with the approach we are taking?
3- If expansion joints are needed, what are the suggested locations? separating the buildings from parking deck?
4- any other comments are appreciated.
Thanks

 

[dik]

I'd likely break it up something like:

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[HTURKAK]

My points,

-The basement under the buildings are heated and the parking area of the basement will be provided with minimum heat but the floor under the surface parking will experience ambient temperature ( -19C to +31C. )

- the basement perimeter walls ( similar to open parking area) probably partial buried and above portion of the walls may subject to thermal loading ..

- I would choose EJ ( and provide for floor slab and walls ) similar to the below sketch ..

If you put garbage in a computer nothing comes out but garbage. But this garbage, having passed through a very expensive machine, is somehow ennobled and none dare criticize it. ( ANONYMOUS )

 

[Robbiee]

Thanks for the input. The underground parking area is fully buried with shafts.
Does the EJ need to continue down in the walls? I am hoping to avoid that by having a control joint lining up with EJ in the slab.
I have seen many times, where the EJ not continuous into the walls, the walls crack at that location.

 

[dik]

I don't follow the question...

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[Robbiee]

Dik,
I am asking if the horizontal EJ in the slab needs to turn vertically into the basement walls down to the footing?
Since the basement walls will not experience significant thermal change, is it not adequate to provide control joints to control shrinkage cracks?

 

[dik]

Exterior expansion joints often occur at a wall of a building. If the area is used for parking, I would try to avoid one in the parking area where it could be subject to wear and tear and debris. Putting expansion joints wherever there is a transition in structure is not a bad idea... between parkade and building would be prudent.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik