CONCLUSIONS AND RECOMMENDATIONS
5.1 Conclusions
The following conclusions were drawn after the design analysis:
Concrete filled hollow block was found worthy for the design and construction of fish pond with minimum service life of ten years when properly designed.
Considering the cost implication in using total reinforcement and the discouragement herewith the fish farmer, intense compaction was only adopted for the bottom floor to account for the undulating nature of the soil and the slight depression as may be caused over time due to service.
Free flow fish ponds were found to give the best result in terms of yield.
Surface free flow was found to be the best design in terms of drainage ease and maintenance and cost implication considered minimal compared to most other types of concrete pond.
The maximum points of failure/cracks were taking care of especially at the joint edges by interlocking of blocks and mass concreting as part of the wall design.
The losses encountered by the pond were found adequate based on the design.
5.2 Recommendations
Where cost is not a problem, it is recommended that total reinforcement be used for optimum service life and should follow all the design codes for water containers outlined by CP110 and BS8110 by Reynold and Steedman, Mosley and Bungay and other related authors.
For swampy areas, it is recommended that foundation/footing as well as the bottom floor be completely reinforced.
For soils with low safe bearing pressure, it is recommended that the depth of foundation and design should follow the concept provided by the Rankine equation, given;
Depth of foundation;
h = P/w 〖((1-sin∅)/(1+sin∅))〗^2
where P = unit vertical pressure under the footing
w = weight of soil per cubic meter
= angle of repose
In situation where the pond is a non-compartment type contrary to the one considered for this project but yet the same or similar size with the design model, it is recommended that columns be
provided with combined or pad footings extending from the footing underground and beams be provided at 600mm from the bottom floor round the whole pond with crossed blocks at every 1m length/width of the entire wall serving as a frame work of rigid frame to the entire pond resisting bending pressure as may be caused by water pressure. The columns are to take care of the failure at the joint edges. The crossed blocks will serve as a simple cantilever to the walls.
It is recommended thus, that where there is problem of water supply, an alternative system with regulating valves be used.
However, to allow for stress redistribution, the pond should be filled slowly for the first time, thus reducing the extent of cracking.
5.1 Conclusions
The following conclusions were drawn after the design analysis:
Concrete filled hollow block was found worthy for the design and construction of fish pond with minimum service life of ten years when properly designed.
Considering the cost implication in using total reinforcement and the discouragement herewith the fish farmer, intense compaction was only adopted for the bottom floor to account for the undulating nature of the soil and the slight depression as may be caused over time due to service.
Free flow fish ponds were found to give the best result in terms of yield.
Surface free flow was found to be the best design in terms of drainage ease and maintenance and cost implication considered minimal compared to most other types of concrete pond.
The maximum points of failure/cracks were taking care of especially at the joint edges by interlocking of blocks and mass concreting as part of the wall design.
The losses encountered by the pond were found adequate based on the design.
5.2 Recommendations
Where cost is not a problem, it is recommended that total reinforcement be used for optimum service life and should follow all the design codes for water containers outlined by CP110 and BS8110 by Reynold and Steedman, Mosley and Bungay and other related authors.
For swampy areas, it is recommended that foundation/footing as well as the bottom floor be completely reinforced.
For soils with low safe bearing pressure, it is recommended that the depth of foundation and design should follow the concept provided by the Rankine equation, given;
Depth of foundation;
h = P/w 〖((1-sin∅)/(1+sin∅))〗^2
where P = unit vertical pressure under the footing
w = weight of soil per cubic meter
= angle of repose
In situation where the pond is a non-compartment type contrary to the one considered for this project but yet the same or similar size with the design model, it is recommended that columns be
provided with combined or pad footings extending from the footing underground and beams be provided at 600mm from the bottom floor round the whole pond with crossed blocks at every 1m length/width of the entire wall serving as a frame work of rigid frame to the entire pond resisting bending pressure as may be caused by water pressure. The columns are to take care of the failure at the joint edges. The crossed blocks will serve as a simple cantilever to the walls.
It is recommended thus, that where there is problem of water supply, an alternative system with regulating valves be used.
However, to allow for stress redistribution, the pond should be filled slowly for the first time, thus reducing the extent of cracking.
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