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Photograph 3.20 Clamshell excavating diaphragm wall (courtesy of D. Highfield).<br />

Revolving cutting head<br />

used to make interlocking joints<br />

Guide wall<br />

Figure 3.78 Diaphragm walls – hydrofraise cutting rigs (adapted from Bachy Soletanche,<br />

http://www.bacsol.co.uk).

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