Cave-ins usually occur in which phases?

Cave-ins typically occur during the stages of trenching and excavation, which is why identifying the appropriate phases is crucial for safety. The term "stages" refers to the specific progression of an excavation process as it deepens and undergoes physical changes.

When excavating, various factors such as soil type, moisture content, and the method of excavation can influence the stability of the trench walls. During these stages, the risk of a cave-in increases if adequate protective measures are not implemented, such as shoring, shielding, or sloping the walls to prevent soil from collapsing.

Understanding the "stages" allows workers to anticipate potential hazards and take proactive measures to ensure safety, thus minimizing the likelihood of injuries or fatalities caused by cave-ins. This knowledge is essential for anyone involved in hoisting and excavation work, as cave-ins are one of the leading causes of construction site accidents.