Figures & data
1 Screenshot Automatic Positioning System (Soilmec S.p.A. Citation2010)
2 Schematics and Bauer – Assistant Positioning System (Bauer Citation2015)
3 a Koden monitor with winch unit, b probe and c Koden recorder unit (Koden Citation2013)
4 Schematics of sensor action (left) and vertical profiles created by the Koden monitor (right)
5 SoniCaliper equipment (left; Loadtest Citation2012), schematics of sensor action (centre) and created horizontal profiles (right)
6 Reported usage of SoniCaliper throughout North America (left) and ratio of responses stating the usage of the SoniCaliper and total responses per region
7 Rope inclinometer system: top unit (left) and carriage (right), both BAUER Spezialtiefbau (Citation2009)
8 Reported application of visual shaft inspection throughout North America
9 Miniature Drilled Shaft Inspection Device (GPE Citation2001)
10 Reported usage of downhole camera throughout North America.
11 Ratio between responses stating the usage of visual inspection, downhole camera and shaft inspection to total responses per region.
12 Ratio between responses stating the usage of coring, CSL, TIP and GGL to total responses per region
13 Compound (anchor–kentledge) load test. (Figure taken from www.piletest.eu)
14 Schematics Osterberg load cell test (Loadtest Citation2016)
