Can you fill in the deep part of a pool with packed sand covered by 4inch layer cement to make it only 5 feet deep?

It's not safe or practical to try filling in a deep part of a pool with packed sand covered by a layer of cement to reduce its depth to 5 feet. There are multiple reasons why this approach is not feasible:

Structural integrity:

Adding a significant amount of weight on the bottom of the pool with sand and cement can compromise the structural integrity of the pool. The additional weight may cause excessive pressure on the pool walls and base, potentially leading to cracking, leaks, or even structural failure.

Water buoyancy

Sand is a porous material that can absorb water, leading to potential waterlogging and further weight addition. This adds to the overall load on the pool structure, increasing the risk of damage.

Settling and compaction:

Sand tends to settle and compact over time, especially when subjected to the weight of water and cement. This settling can create uneven surfaces, dips, or voids in the pool, compromising its safety and aesthetics.

Drainage and maintenance:

The layer of cement over the sand can hinder proper drainage and make it challenging to maintain the water quality in the pool. Without adequate drainage, water can accumulate, creating stagnant pools that are prone to algae growth and other waterborne contaminants.

Excavation and disposal:

Reducing the depth of a pool by physically filling it with sand and cement requires extensive excavation and removal of the existing pool water. This process can be highly disruptive, time-consuming, and may involve complex regulations regarding proper disposal of excavated materials.

In summary, trying to fill in the deep part of a pool with packed sand and cement to make it shallower is not a safe or practical solution. It is essential to consult with professionals, such as structural engineers and pool experts, for safe and reliable options for modifying pool depth or other structural changes.