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Volume 6 – Geotechnical Manual, Site Investigation and Engineering ...

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Chapter 9 FOUNDATION ENGINEERING<br />

Figure 9.5 Typical Instrumentation Scheme for a Vertical Pile Loading Test<br />

9.2.5.3<br />

Test Procedures<br />

a) General<br />

Two types of loading test procedures are commonly used, namely<br />

maintained-load (ML) <strong>and</strong><br />

constann t-rate-of-penetration (CRP) tests. The ML method is applicable t o compression,<br />

tension <strong>and</strong> lateral loading tests,<br />

whereas the CRP method is used mainly in compression loading<br />

tests.<br />

The design working load (W L<br />

) of the pile should be pre-determined<br />

where W L<br />

is defined as the<br />

allowable<br />

load for a pile before allowing for<br />

factors such as negative skin friction, group effects<br />

<strong>and</strong> redundancy.<br />

March 2009<br />

9-21

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