There are no studies to show that replenished beaches are more dangerous, but if there were, it might be possible to pursue a claim against those who replenish the beach without considering the increased danger to surfers and other beach-goers.
There are also other environmental factors that impact your safety at the beach including the weather that day and the height of the waves. Currents and wind speed are major factors in spinal cord injuries and daily beach injuries on the whole.
If you go to the beach and suffer an injury, it’s possible you may have a claim depending on where you are and what happened. Recent changes to the beach could make the premises’ owner liable, whereas accidents from vehicles on the beach may be the responsibility of the driver of the vehicle.
Beaches are generally safe, but you need to be aware of the risks. Have fun in the sun, but remember to look around and stay vigilant while you enjoy your time at the beach.