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This is a revised and updated edition of the highly successful
first and second editions. In the intervening period the procedures
used in the description of soils and rocks have continued to
develop and evolve and this new edition incorporates changes in the
international standards EN ISO 14688 and 14689 and those resulting
in the national standard, BS 5930:2015 and the 2020 amendment
thereof. Close comparison is also made with US practice in
description (ASTM D2488) and classification (ASTM D2487).
Significant changes in rock description are included – the
reintroduction of the Approaches 1 to 5 for rock weathering;
Approach 1 for description and Approaches 2 to 5 (Rock Weathering
Working Party) for classification when appropriate and helpful.
Also covered is the reintroduction of the 12.5 MPa boundary and the
term moderately weak in rock strength description: a significant
boundary in design in rock. The book continues to provide
invaluable practical guidance in carrying out engineering
geological logging of soil and rock samples and exposures in the
field. The systematic and codified approach is laid out in detail
to ensure the defined descriptors are used in a consistent format,
rendering mistakes less likely and the necessary communication from
field to design more successful. The procedures, techniques and
tips within this book continue to serve and guide young
practitioners learning their craft, but also their seniors and
mentors, including responsible experts who sign off the logs and
report on behalf of their company. More than ever, the need to be
aware of current practices in order in order to avoid costly
mistakes is paramount.
This is a revised and updated edition of the highly successful
first edition. In the intervening period the procedures used in the
description of soils and rocks have continued to develop and evolve
and this new edition incorporates changes in the national and
international standards, BS 5930:2015 and EN ISO 14688 and 14689
and makes close comparison with US practice in description (ASTM
D2488) and classification (ASTM D2487). In addition, changes in
definitions, naming procedures, and new terms are all included and
explained.
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