Book cover for Advances in geotechnical engineering: The Skempton conference: Proceedings of a three day conference on advances in geotechnical engineering, organised by the Institution of Civil Engineers and held at the Royal Geographical Society, London, UK, on 29–31 March 2004
Advances in geotechnical engineering: The Skempton conference: Proceedings of a three day conference on advances in geotechnical engineering, organised by the Institution of Civil Engineers and held at the Royal Geographical Society, London, UK, on 29–31 March 2004
Author and Other Information
Emerald Publishing Limited
DOI:
https://doi.org/10.1680/aigev1.32644
ISBN electronic:
978-0-7277-3646-8
Publication date:
2004
Book Chapter

Use of the Observational Method for the construction of a road cutting in Glacial Till

By
T J P Chapman;
T J P Chapman
1Arup, London, UK
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SJ Deeble;
SJ Deeble
2Edmund Nuttall Ltd, Camberley, UK
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DP Nicholson
DP Nicholson
1Arup, London, UK
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Author and Other Information
T J P Chapman
1Arup, London, UK
SJ Deeble
2Edmund Nuttall Ltd, Camberley, UK
DP Nicholson
1Arup, London, UK
© Institution of Civil Engineers 2004 unless otherwise stated
2004
Doi:
https://doi.org/10.1680/aigev2.32644.0031
  • Published:
    2004
© Institution of Civil Engineers 2004 unless otherwise stated
2004

The Observational Method was successfully used for the construction of a road cutting in Glacial Till in north London. Better and more appropriate soil parameters were derived by back-analysing neighbouring excavations. Use of the method allowed construction to take place in an open cut supported by berms instead of beneath raking props. Monitoring showed that movements remained in the green zone and there was no need to implement any of the planned contingencies. The overall savings were about 5% on cost and at least 18% on programme with a marked reduction in the materials and plant used, giving added environmental benefits.

  • Introduction

  • Ground Conditions

  • Planned and actual Construction Sequences

  • Soil Design Parameters for Observational Method Design

  • Implementation of Observational Method

  • Application and Results

  • Discussion

  • Conclusions

  • Acknowledgements

  • References

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