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is also measured by the computer. When torque levels reach a constant low
value the base in formed. The inventors claim that the system can install a\
typical pile in 22 minute. A typical 6m long pile with an 800mm diameter base and
350mm shaft founded on moderately dense gravel beneath soft overlaying soils
can achieve an ultimate capacity of over 200t. The pile is suitable for
embankments, hard standing supports and floor slabs, where you have a soft silty
layer over a gravel strata.

Figure 8 -4 C.H.D.P.

LOAD TEST ON PILES

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9.2 Introduction

Pile load test are usually carried out that one or some of the following
reasons are fulfilled:

• To obtain back-figured soil data that will enable other piles to be
designed.
• To confirm pile lengths and hence contract costs before the
client is committed to over all job costs.
• To counter-check results from geotechnical and pile
driving formulae
• To determine the load-settlement behaviour of a pile, especially
in the region of the anticipated working load that the data can be

used in prediction of group settlement.
• To verify structural soundness of the pile.

Test loading: There are four types of test loading:

• compression test
• uplift test
• lateral-load test
• torsion-load test

the most common types of test loading procedures are Constant rate of
penetration (CRP) test and the maintained load test (MLT).