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Solution Manual Vol 7

Solution Manual Vol 7 - Craig's Soil Mechanics Seventh...

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Craig’s Soil Mechanics Seventh Edition Solutions Manual
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Craig’s Soil Mechanics Seventh Edition Solutions Manual R.F. Craig Formerly Department of Civil Engineering University of Dundee UK
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First published 1992 by E & FN Spon, an imprint of Thomson Professional Second edition 1997 Third edition 2004 11 New Fetter Lane, London EC4P 4EE Simultaneously published in the USA and Canada by Spon Press 29 West 35th Street, New York, NY 10001 Spon Press is an imprint of the Taylor & Francis Group ª 1992, 1997, 2004 R.F. Craig All rights reserved. No part of this book may be reprinted or reproduced or utilised in any form or by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying and recording, or in any information storage or retrieval system, without permission in writing from the publishers. British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging in Publication Data A catalog record for this book has been requested ISBN 0–415–33294–X This edition published in the Taylor & Francis e-Library, 2004. (Print edition) ISBN 0-203-31104-3 Master e-book ISBN ISBN 0-203-67167-8 (Adobe eReader Format) collection of thousands of eBooks please go to www.eBookstore.tandf.co.uk.” “To purchase your own copy of this or any of Taylor & Francis or Routledge’s
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Contents 1 Basic characteristics of soils 1 2 Seepage 6 3 Effective stress 14 4 Shear strength 22 5 Stresses and displacements 28 6 Lateral earth pressure 34 7 Consolidation theory 50 8 Bearing capacity 60 9 Stability of slopes 74
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Author’s note In order not to short-circuit the learning process it is vital that the reader should attempt the problems before referring to the solutions in this manual.
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Chapter 1 Basic characteristics of soils 1.1 Soil E consists of 98% coarse material (31% gravel size; 67% sand size) and 2% fines. It is classified as SW: well-graded gravelly SAND or, in greater detail, well-graded slightly silty very gravelly SAND. Soil F consists of 63% coarse material (2% gravel size; 61% sand size) and 37% non-plastic fines (i.e. between 35 and 65% fines); therefore, the soil is classified as MS: sandy SILT. Soil G consists of 73% fine material (i.e. between 65 and 100% fines) and 27% sand size. The liquid limit is 32 and the plasticity index is 8 (i.e. 32 ± 24), plotting marginally below the A-line in the ML zone on the plasticity chart. Thus the classification is ML: SILT (M-SOIL) of low plasticity. (The plasticity chart is given in Figure 1.7.) Figure Q1.1
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Soil H consists of 99% fine material (58% clay size; 47% silt size). The liquid limit is 78 and the plasticity index is 47 (i.e. 78 ± 31), plotting above the A-line in the CV zone on the plasticity chart. Thus the classification is CV: CLAY of very high plasticity.
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