AI for Construction Site Safety Management — A Practicing QS Professional's Honest Guide
The Day the Excavation Wall Collapsed It was the morning after heavy rain. Two workers were inside an excavation trench, working on RC pipe installation. The trench was approximately 1.5 metres deep, cut vertically with no sloping and no benching. The previous day's rainfall had saturated the surrounding soil. Nobody had reassessed the excavation stability before allowing the workers to enter. Without warning, the excavation wall collapsed inward. Both workers were covered by the fallen soil. By some miracle, neither worker suffered serious physical injury. The response was immediate. All excavation works across the entire project were stopped. The subcontractor was required to submit a formal corrective action plan before any work could resume. As the main contractor, we implemented a new rule covering every excavation site: any excavation deeper than 1 metre requires proper sloping or bench excavation. We printed the requirement and posted it at every excavation locatio...