Abstract
The procedure for geotechnical site investigation is well established but little attention is currently given to investigating the potential of vegetation to assist with ground stability. This paper describes how routine investigation procedures may be adapted to consider the effects of the vegetation. It is recommended that the major part of the vegetation investigation is carried out, at relatively low cost, during the preliminary (desk) study phase of the investigation when there is maximum flexibility to take account of findings in the proposed design and construction. The techniques available for investigation of the effects of vegetation are reviewed and references provided for further consideration. As for general geotechnical investigation work, it is important that a balance of effort is maintained in the vegetation investigation between (a) site characterisation (defining and identifying the existing and proposed vegetation to suit the site and ground conditions), (b) testing (in-situ and laboratory testing of the vegetation and root systems to provide design parameters) and (c) modelling (to analyse the vegetation effects).
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References
Anderson M G, Collison A J C, Hartshorne J, Lloyd D M and Park A 1996 Developments in slope hydrology—Stability modelling for tropical slopes, In NG Anderson and SM Brooks (eds), Advances in Hillslope Processes, pp. 799–821. Wiley, Chicester.
Barker D H 1986 Enhancement of slope stability by vegetation, Ground Eng., 19, 11–15.
BS 1377 1990 British Standard Methods of Test for Soils for Civil Engineering, British Standards Institution [Parts 1–9].
BS 5930 1999 Code of Practice for Site Investigation, British Standards Institution.
Brinkgreve R B J 2002 Plaxis 2D—Version 8 Manual, Balkema, Lisse.
Burland J B 1989 Nash lecture: The teaching of soil mechanics—A personal view. In Proceedings of 9th European Conference on Soil Mechanics and Foundations, Dublin, September 1987, Balkema, Rotterdam/Boston 3: 1427–1441.
Cammeraat L H, van Beek L P H and Dorren L K A 2002 Ecoslopes Field Protocol. Version 1. University of Amsterdam, Amsterdam, the Netherlands.
Clayton C R I, Matthews M C and Simons N E 1995 Site Investigation: A Handbook for Engineers. Blackwell, Oxford.
Coppin N J and Richards I G 1990 Use of Vegetation in Civil Engineering, Butterworths, London.
Dobson M 1995 Tree root systems. Arboriculture Research and Information Note 130/95/Arb. Parnham Arboricultural Advisory and Information Sytems 1–6.
Dupuy L, Fourcaud T and Stokes A 2005 A numerical investigation into factors affecting the anchorage of roots in tension. Eur. J. Soil Sci., 56(3), 319–327, online doi:10.1111/j.1365-2389.2004.00666.x.
Gardiner B A, Suárez J C, Achim A, Hale S E and Nicoll B C 2000 ForestGALES. A PC-based Wind Risk Model for British Forests. Version 2.0, User’s Guide, Forestry Commission, Edinburgh.
Gaskin G J and Miller J D 1996 Measurement of soil water content using a simplified impedance measuring technique, J. Agr. Res., 63, 153–160.
Gray D H and Sotir R B 1995 Biotechnical stabilization of steepened slopes, Transport. Res. Record, 1474, 23–29.
Greenwood J R 2005 Site and ground investigation, In Selley, Cocks and Plimer (eds), Encyclopedia of Geology, Vol. 1, pp. 580–594. Elsevier, Oxford.
Greenwood J R 2006 SLIP4EX—Program for routine slope stability analysis to include the effects of vegetation, reinforcement and hydrological changes. J. Geotech. Geol. Eng., 24, 449–465.
Greenwood J R and Norris J E 1999 ‘Moisture in the Bag’, A simplified procedure for the determination of soil moisture content by oven drying, Ground Eng., 32(6), 32–33.
Greenwood J R, Norris J E and Wint J 2004 Assessing the contribution of vegetation to slope stability, J. Geotech. Eng., 157(4), 199–208.
Greenwood J R, Norris J E, Wint J and Barker D H 2003 Bioengineering and the transportation infrastructure. In Proceedings of the Symposium on Transportation Geotechnics, Nottingham, September 2003, Thomas Telford, London, pp. 205–220.
Greenwood J R, Vickers A W, Morgan R P C, Coppin N J and Norris J E 2001 Bioengineering—The Longham Wood Cutting field trial. CIRIA Project Report 81, London.
Highways Agency HD22/02 Ground Investigation and Earthworks—Procedure for Geotechnical Certification (DMRB 4.1.2).
Hruska J, Cermák J and Svatopluk S 1999 Mapping tree root systems with ground-penetrating radar, Tree Physiol., 19, 125–130.
MacNeil D J, Steele D P, McMahon W and Carder D R 2001 Vegetation for slope stability. TRL Report 515, Crowthorne, TRL Limited.
McCann D M, Eddlestone M, Fenning P J and Reeves G M 1997 Modern Geophysics in Engineering Geology, Geological Society Special Publication No. 12. Geological Society, London.
Mickovski S B and van Beek L P H 2006 A decision support system for the evaluation of eco-engineering strategies for slope protection. J. Geotech. Geol. Eng., 24, 483–498.
Norris J E and Greenwood J R 2000a Review of in-situ shear tests on root reinforced soil, In Stokes (ed), The Supporting Roots of Trees and Woody Plants: Form, Function and Physiology. Developments in Plant and Soil Sciences, Vol. 87, pp. 287–294. Kluwer, Dordrecht.
Norris J E and Greenwood J R 2000b In situ shear and pull out testing to demonstrate the enhanced shear strength of root reinforced soil. In Proceedings of 8th International Symposium on Landslides, Cardiff, June 2000, Thomas Telford, London, Vol. 3, pp. 1123–1128.
Norris J E and Greenwood J R 2003 In-situ shear box and root pull-out apparatus for measuring the reinforcing effects of vegetation. In Myrvoll (ed), Field Measurements in Geomechanics, pp. 593–597. Swets and Zeitlinger, Lisse.
Operstein V and Frydman S 2002 The stability of soil slopes stabilised with vegetation, Ground Improvement, 6(4), 163–168.
Perry J 1996 Sources of information for site investigations in Britain. TRL Report 192, Transport Research Laboratory, Crowthorne.
Ryan H D P and Bloniarz D V 2000 Irrigation Systems and Trees. UMASS Extension, University of Massachusetts Amherst, Massachusetts. (http://umassgreeninfo.org/fact\_sheets/ plantculture.html).
Simons N, Menzies B and Matthews M 2002 A Short Course in Geotechnical Site Investigation, Thomas Telford, London.
Site Investigation Steering Group 1993 Part 1: Without site investigation ground is hazard; Part 2: Planning, procurement and quality management; Part 3: Specification for ground investigation; Part 4: Guidelines for safe investigation by drilling of landfills and contaminated land. Thomas Telford, London.
Stokes A, Fourcard T, Hruska J, Cermak J, Nadyezdhina N, Nadyezhdin V and Praus L 2002 An evaluation of different methods to investigate root system architecture of urban trees in situ: 1. Ground penetrating radar, J. Arboriculture, 28, 1–9.
Topp G C and Davis J L 1985 Measurement of soil water content using time-domain reflectrometry (TDR): A field evaluation, Soil Sci. Soc. Am. J., 49, 19–24.
Vickers A W and Morgan R P C 1999 Soil–water monitoring to assess the effectiveness of three bioengineering treatments on an unstable Gault Clay cutting in Southern England. In Proceedings of the 2nd International Conference on Landslides, Slope Stability and the Safety of Infra-Structures, Singapore, July 1999, pp. 95–102.
Wu T H 1995 Slope stabilization. In RPC Morgan and RJ Rickson (eds), Slope Stabilisation and Erosion Control—A Bioengineering Approach, pp. 221–364. E and FN Spon, London.
Wu T H 2006 Root reinforcement: analysis and experiments. In Proceedings of the International Conference on Eco-Engineering: The Use of Vegetation to Improve Slope Stability, Thessaloniki, September 2004 (in press).
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Greenwood, J.R., Norris, J.E., Wint, J. (2007). Site investigation for the effects of vegetation on ground stability. In: STOKES, A., SPANOS, I., NORRIS, J.E., CAMMERAAT, E. (eds) Eco-and Ground Bio-Engineering: The Use of Vegetation to Improve Slope Stability. Developments in Plant and Soil Sciences, vol 103. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5593-5_19
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DOI: https://doi.org/10.1007/978-1-4020-5593-5_19
Publisher Name: Springer, Dordrecht
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