weather hazard

[killi_82]

Hi all,

need some your expertise.

currently, we are at the progress of excavation of MRT station, imagine that the excavation is about twenty meters depth.
But, during excavation work, we face many times heavy rain on site and some locations are flooded.

I wanna ask, would it be safely or dangerous for the works if the water stay there (flooded) quite long, or should we pump it out of the excavation as soon as possible?

thanks!

 

[darthsoilsguy2]

With just a little bit of imagination i can come up with both "Yes" and "No" answers to your question. nobody could really offer a useful comment without the soils report, site prep plan, grading plan, structural plans, understanding of schedule and means/methods to be used... and then it would still require a lot of work and coordination with the players.

 

[killi_82]

Absolutely yes.

one opinion/question:
if this is related to the pore pressure and effective stress, if the pore water pressure increase then the effective stress is decrease.
If the effective stress is more further down, it would create instability in excavation.

what do you think?

Thanks.