| Abstract: | Conclusions
| 1. |
Gidrospetsproekt should design the groundwater system.
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| 2. |
One contractor should drill the wells and operate the groundwater-lowering system.
|
| 3. |
In connection with the geological conditions, the wells should be of very high quality, for which own enrichment of the filter
material (sand of the blanket) and strict control during drilling the wells are necessary.
|
| 4. |
It is efficient to drill the wells by a 1BA-15V rig with a tool with backwashing.
|
| 5. |
With respect to piles of the penstock foundation: Drilling the holes for the piles should be done only with casings. To organize
24-h work for increasing productivity. Works on forming the pile heads should be done immediately after concreting the pile.
The piles should be tested after each change in the geological conditions.
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| 6. |
With respect vertical drainage: the wells should be of high quality, with an enormous safety margin.
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Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 10, pp. 29–33, October, 1999. |
