How to preventwater from excavation side from under water table excavations
How to preventwater from excavation side from under water table excavations
(OP)
I am executing a project to construct a RCC water reservoir sized 26 MTR long x 10 MTR wide and 4.50 MTR deep
water table is at 1.90 MTR deep
construction site is very near to sea. I reached to the required depth and poured the lean concrete thickness varies from 250 MM to 180 MM thick. I am dewatering around the newly poured lean concrete.
Now I want to start the structural RCC construction for new reservoir. Water stopped from the bottom after lean concrete but I have big issue of water seepage from sides of the excavation. I have extended the floor lean concrete from edge to edge of excavation.
I was thinking today, to pour lean concrete to the sides of excavation up to water table level.
Will it work and will stop water from sides of excavation ??
Secondly, under these circumstances, its very hard to install forms and pour the concrete for walls in single pouring. Can I pour the walls first up to height of water table, and then after backfilling to do the second poring up to required top level ??
water table is at 1.90 MTR deep
construction site is very near to sea. I reached to the required depth and poured the lean concrete thickness varies from 250 MM to 180 MM thick. I am dewatering around the newly poured lean concrete.
Now I want to start the structural RCC construction for new reservoir. Water stopped from the bottom after lean concrete but I have big issue of water seepage from sides of the excavation. I have extended the floor lean concrete from edge to edge of excavation.
I was thinking today, to pour lean concrete to the sides of excavation up to water table level.
Will it work and will stop water from sides of excavation ??
Secondly, under these circumstances, its very hard to install forms and pour the concrete for walls in single pouring. Can I pour the walls first up to height of water table, and then after backfilling to do the second poring up to required top level ??






RE: How to preventwater from excavation side from under water table excavations
RE: How to preventwater from excavation side from under water table excavations
Suggest getting a geotech engineer to investigate. If well point's won't do the job, a cofferdam may be required.
For your second question, concrete can be placed under water but constructing a formed properly reinforced structure underwater is not practical.
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RE: How to preventwater from excavation side from under water table excavations
Is there a geotech on the job that can give you advice?
I once did a deep excavation next to a wide, flowing river with sandy soil. With the properly designed and installed well points the excavation was completely dry during the construction process.
RE: How to preventwater from excavation side from under water table excavations
RE: How to preventwater from excavation side from under water table excavations
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RE: How to preventwater from excavation side from under water table excavations