Some remarks on the design of sludge storage ponds (hydraulic-fill dumps)

Conclusions

• 1. Sludge storage ponds can be located on any foundation soils, but economic calculations should be made for selecting the site.

• 2. In the presence of seismic conditions, it is necessary to remove weak soils within the shoulder in order to provide its stability with a steepness of the downstream slope up to m=5. Other methods providing stability of the shoulder can also be used with appropriate technical and economic substantiation.

• 3. The stability and possible liquefaction of soils of the shoulder should be determined only according to the guide “Consideration of seismic loads when designing hydraulic structures,” which is the only standard with respect to this problem.

• 4. The size of the hydraulic-fill beach is determined on the basis of the particle-size distribution of the slurry.

• 5. The permissible minimum width of the hydraulic-fill beach is determined on the basis of calculating the stability of the shoulder.

• 6. It is necessary to recommend the construction of a siphon intake (discharge) located on the bank of the settling pool, which gives a more reliable and economical solution.