In Situ Underground Car Park

The answer will depend on what resource you have available however consider this

How many piles do you have to cut down? Calculate how you long you thinkm it will take to cut all the piles say 6 weeks

Add to this duration the time lag to get your first section of raft ready to pour say 4 weeks

Add to this a reasonable floor to floor cycle time say 4 weeks X 4 (including ground)

Answer = 26 weeks

To achieve this you will need to place an average of 300m3 concrete per day.

Greetings Alex,

my company submitted a tender for a similar underground parking a few years ago, from what I can remember the the parking had only 3 levels and there wasn't neccesary to use piles, the parking had a raft foundation of aproximately 1 meter hight. The floor area was similar. The difference was that it was in the middle of the city and there was a park with some monuments on top of the site of the future parking which had to be removed and placed back after the parking was finished. 

Now that you have a general ideea of the work, the estimated duration of the structure was estimated at 8 months since you were allowed to dig only at night.

You should defenetely take into consideration the risk of findig artefacs or a grave site (this is what happened in the previous project thus resulting in 6 months delay of the project).

Regads,

Bogdan

Thanks Andrew, appreciate your input.

With regards to resources I don’t envisage more than 3 tower cranes for such an area. Is there any rule of thumb as to how much in-situ concrete can be installed per tower crane working say 10 hours a day only for formwork / reinforcement / striking of all the elements that I listed in my initial post? (I assume that concrete placement will be done by concrete pumps). I’m looking for an average figure per day..

Regards,

Alex

Bogdan,

Thanks a lot for sharing your valuable experience.

Regards,

Alex