Re-evaluation of the Design during Construction with Monitoring Data and Utilization of the Observational Method in Shoring Works-PPT Presentation

PPT Presentation

Pdf Summary

The presentation examines the use of monitoring data and the observational method to reassess shoring designs during construction, using two case studies.<br /><br />The first project involved a 13.3 m excavation supported by a diaphragm wall with prestressed anchors and struts. Groundwater was 1.5 m below the surface, and there were no adjacent structures. Monitoring showed that the initially planned third row of anchors was unnecessary, allowing it to be removed.<br /><br />The second project involved a 23 m excavation along a 110 m frontage, with adjacent structures and no groundwater. The excavation was supported by soil nails and shotcrete. Monitoring indicated that the original soil-nailing design provided insufficient support, so additional measures were introduced to complete the excavation safely.<br /><br />Together, the cases demonstrate that a well-planned monitoring system can guide timely design adjustments. Applying the observational method can improve safety and optimize support systems, potentially reducing costs, construction time, and environmental impact.

Keywords

monitoring data

observational method

shoring design

excavation support

case studies

diaphragm wall

prestressed anchors

soil nails

shotcrete

construction safety