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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
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.
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Chapter 8
Push technology in the rail environment
Investigations
INVESTIGATIONS 8.3 |
| Investigation in the railway environment can be divided into three different areas. Track bed Cone penetration tests can be used to carry out track bed investigations. A CPT can tell the thickness and quality of the ballast and sub-grade. It can be used in conjunction with GPR to help correlate data. Embankments CPTs are mostly suited to embankment investigation. Due to the material that embankments are made up of, they are ideal for CPTs. There is a range of rigs for testing through the 4-foot ballast on an embankment, on the slope of the embankment or cutting, and at the toe.
Tunnels Working in tunnels can be difficult depending on the direction from which the testing is being carried out. The direction of the testing depends on the thickness of the walls (pre-coring will be needed) and if there is any drainage in the base of the tunnel. Tests can be carried out in any direction if a reaction force can be gained. |
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