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Published By Lankelma

Lankelma is the foremost contractor for onshore in-situ soil testing in the UK. An acknowledged specialist in CPT, Lankelma also offers a worldwide consultancy and training service.

A.P. van den Berg develops, designs and manufactures geotechnical and environmental soil investigation equipment for onshore and offshore applications. Specialists in CPT systems and equipment.


Gardline Geosciences offers worldwide marine geotechnics, in-house consutancy and services with marine investigations ranging from nearshore to full ocean depth (down to 3000m).

About the Author

Hans Brouwer studied civil engineering at Delft University in The Netherlands. He has worked as a part-time lecturer at Amsterdam Polytechnic and was senior partner in a structural engineering consultancy. He has written a standard textbook in Dutch about the design of building foundations. He now lives in England where he writes technical textbooks in English, hopefully to reach a bigger readership.

Chapter 1




Cone penetration testing (CPT) is the most versatile device for in situ soil
testing. Without disturbing the ground, it provides information about soil
type, geotechnical parameters like shear strength, density, elastic
modulus, rates of consolidation and environmental properties. Further, as
it can be seen as a small scale test pile, it is the best and most costeffective
device to design piled foundations and sheet piles.

The book describes more than 25 special probes, samplers and
instrumentation devices. Most of them are for use on land, but many can
also be deployed at sea. To name a few; there is a seismic cone, a
chemical sounding probe, a hydrocarbon probe, a video cone, a cone for
bomb detection and many others.

Using CPT rigs makes it possible to take soil samples at a specified
depth. The hydraulic rams push the sampler, with the cutting mouth
closed, into the ground. After opening the mouth at a certain depth and
pushing forward, the sample is taken into a lining stocking and retrieved.
This guide describes the practice of in-situ subsoil testing on land and at
sea. It gives information on land-based rigs, sea-bed platforms, underwater
vehicles and vessels.

The appendices give worked examples for the design of piles and shallow
foundations. Design should be carried out by qualified engineers with
enough experience and local knowledge. The design methods shown in
the appendices must only be used alongside existing practice.Hans Brouwer
Iden, East Sussex
January 2007

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