Quality Verification Engineering for Secant Pile Walls: Insights from the Darlington New Nuclear Project-PPT Presentation

PPT Presentation

Pdf Summary

The presentation describes quality verification engineering (QVE) for secant pile walls supporting the first small modular reactor at Ontario’s Darlington New Nuclear Project. The project includes three shafts and 458 piles, constructed in challenging ground conditions where overburden transitions to shale and limestone near Lake Ontario.<br /><br />The presenters argue that traditional QVE is often observational and post-construction, limiting its ability to influence decisions while work is underway. Their alternative is a transparent, collaborative, real-time approach intended to identify and resolve issues before they cause delays.<br /><br />A custom app, powered by Construction Data Solutions, records drilling, concreting, reinforcement, shift, and labor/equipment/material information. It tracks concrete volume and drop, tremie and casing embedment, pile verticality, concrete expiry, and test results, with alerts for potential deviations. Drill crews, engineers, designers, and client teams can access project information and field feedback.<br /><br />Verification continues after pouring through analysis of concrete volumes and embedment records, cross-checking, and Thermal Integrity Profiling (TIP). Wall maps help visualize installation data and identify anomalies. In one example, the measured concrete drop was six times the theoretical estimate; alerts highlighted concrete-drop and embedment concerns, and TIP confirmed shaft anomalies. Coring and permeation grouting were also undertaken.<br /><br />Detailed caisson records support quality assurance, handover, audits, and long-term documentation, with client sign-off completed on site. The presentation concludes with potential future uses of QVE data, including AI-assisted reviews, predictive anomaly detection, ground-condition classification, shaft-risk mapping, and feedback to improve crew training.

Keywords

quality verification engineering

secant pile walls

small modular reactor

Darlington New Nuclear Project

real-time monitoring

Construction Data Solutions

concrete volume tracking

thermal integrity profiling

ground conditions

anomaly detection