Keynote Speaker: Reducing Risk Through Prediction and Performance Monitoring-Video

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Video Summary

The speaker discusses how geotechnical engineers can reduce project risk through thorough site investigations, appropriate laboratory and field testing, load tests, and ongoing performance monitoring. He emphasizes Ralph Peck’s observational method: make informed predictions, monitor conditions as construction proceeds, set action thresholds, and prepare a Plan B when assumptions prove wrong.<br /><br />Chicago’s history provides examples of how foundation practice advanced through load testing, settlement observations, and improved tools such as pressure meters. Case studies of high-rise buildings show how measured performance can validate predictions, guide design changes, and reveal lessons—including when conservative foundation solutions prove unnecessary.<br /><br />The main contemporary case study is a large, deep auditorium built beside existing buildings and infrastructure on a karstic site. Unexpected weak clay near the excavation base required changes to the anchoring strategy. Staged excavation, instrumentation, and close coordination among engineers and contractors helped control wall movement and protect nearby structures. The speaker also describes a subsequent project with similar challenges.<br /><br />He concludes that sound engineering depends on measuring and interpreting performance, adapting to actual ground conditions, and treating contractors as equal partners in managing risk.

Keywords

geotechnical engineering

site investigation

observational method

load testing

performance monitoring

foundation design

excavation support

karst geology