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Institute Excavations Safety & Health Construction Safety Excavations General Industry Safety What would you Do Answers English Mine Safety Analysis Focus Area USA

Preventing cave-ins and excavation hazards: Answer

What are the issues?

  • Tension cracks in the trench
  • Collapsed trench wall.

What did Gordon do right?

  • Was observant of the conditions of the trench wall.
  • Understood the hazards of working in a trench.
  • Took control of the situation and made Andy get out of the trench first.
  • Informed competent person immediately.

What went wrong? In this case, procedures were followed correctly.

Training tips

  • Tension cracks in walls of, slopes of, or the ground near the excavation.
  • Ground settlement or sinking.
  • Changes in wall slope or bulging walls.
  • Increase in strut loads.
  • Spalling (breaking off in slabs) of soil.
  • Sloughing (crumbling or falling away) of soil.
  • Excessive seepage and piping of fine soils.
  • Softening of sidewalls.
  • Boiling of trench bottom.
  • Creaking or popping sounds.
  • Visual deformation of bracing system.

The presence of any of these signs indicates that your employees should not enter a trench. If they are in the trench, they should get out immediately. In either case, the problem should be reported to the supervisor or competent person.

excavations
Excavations
excavations
Excavations
Institute Excavations Safety & Health Construction Safety Excavations General Industry Safety What would you Do Answers English Mine Safety Analysis Focus Area USA

Preventing cave-ins and excavation hazards: Answer

Institute Excavations Safety & Health Construction Safety Excavations General Industry Safety What would you Do Answers English Mine Safety Analysis Focus Area USA

What are the issues?

  • Tension cracks in the trench
  • Collapsed trench wall.

What did Gordon do right?

  • Was observant of the conditions of the trench wall.
  • Understood the hazards of working in a trench.
  • Took control of the situation and made Andy get out of the trench first.
  • Informed competent person immediately.

What went wrong? In this case, procedures were followed correctly.

Training tips

  • Tension cracks in walls of, slopes of, or the ground near the excavation.
  • Ground settlement or sinking.
  • Changes in wall slope or bulging walls.
  • Increase in strut loads.
  • Spalling (breaking off in slabs) of soil.
  • Sloughing (crumbling or falling away) of soil.
  • Excessive seepage and piping of fine soils.
  • Softening of sidewalls.
  • Boiling of trench bottom.
  • Creaking or popping sounds.
  • Visual deformation of bracing system.

The presence of any of these signs indicates that your employees should not enter a trench. If they are in the trench, they should get out immediately. In either case, the problem should be reported to the supervisor or competent person.

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Answer
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