What does a shield system protect employees from during excavation work?

A shield system is a safety measure specifically designed to protect employees working in excavation sites from cave-ins, which are collapses of the walls of the trench or excavation area. Such collapses pose significant risks to workers, potentially leading to serious injuries or fatalities. The shield acts as a supportive barrier, allowing workers to safely operate within the excavation while minimizing the risk associated with soil instability.

While other protective measures may address issues like noise pollution, adverse weather conditions, and machinery hazards, these are not the primary function of a shield system. A shield system is focused on managing the physical risks posed by the surrounding soil during excavation activities, making it crucial for maintaining the safety of personnel working in such environments.