Comparing thermal integrity test data with as-built conditions-PPT Presentation

PPT Presentation

Pdf Summary

The presentation examines how thermal integrity test data from two deep diaphragm wall shafts in London should be interpreted alongside as-built construction conditions. Thermal sensor cables were installed to record temperature profiles, but reliable anomaly detection depends on first establishing the expected thermal “signature” for the site conditions and panel geometry.<br /><br />Several construction details can affect readings and may resemble defects. Temporary stop-ends can dissipate heat, producing lower temperatures. Couplers increase local steel density and reduce the volume of concrete, also lowering temperatures. Conversely, an absence of aggregate increases the proportion of cement and can raise temperatures. Cage translation may reduce concrete cover on the near face, leading to lower readings.<br /><br />The presentation stresses that reporting should assess test data in the context of how each element was actually constructed. Relevant factors include ground conditions, overall element dimensions, bentonite fluid properties, construction timings, concreting records, and overbreak. Considering these factors helps distinguish expected temperature variations caused by construction from genuine anomalies.

Keywords

thermal integrity test

diaphragm wall

deep shafts

London construction

temperature profiles

anomaly detection

construction conditions

sensor cables

concrete cover

as-built records