Abstract
Changes in ground elevation were monitored between 1990 and 1997 at depths of 0.4, 0.8, 1.2 and 1.6 m and distances of 1, 2.5, 5, 10, 15, 20, 25 and 50 m from a mature oak tree on the Lias Clay of Lower Jurassic age. Whilst movement was evident at all monitoring points, it was most pronounced within 5 m of the tree where in 1995 a maximum seasonal difference of 63 mm was recorded at 0.4 m depth, compared with only 14 mm at the same depth but 10 m from the tree. The influence of the tree on the geotechnical properties of the Liassic clays is reported.
Résumé
Des modifications de cote des terrains ont t mesures entre 1990 et 1997 des profondeurs de 0,4m, 0,8m, 1,2m et 1,6m et des distances de 1m, 2,5m, 5m, 10m, 15m, 20m, 25m et 50m d’un chne adulte enracin sur les argiles du Lias, d’ge jurassique infrieur. Alors que le mouvement tait vident pour tous les points de mesure, il tait le plus prononc des distances de l’arbre infrieures 5m o une diffrence saisonnire de mouvement de 63mm a t enregistre 0,4m de profondeur en 1995, comparer avec seulement 14mm la mme profondeur mais une distance de 10m de l’arbre. L’influence de l’arbre sur les proprits gotechniques des argiles liasiques est souligne.
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References
Barrett J (1995) Vertical ground movements in overconsolidated mudrocks. Unpublished Ph.D thesis, University of Bristol, UK
Biddle PG (1983) Patterns of soil drying and moisture deficit in the vicinity of trees on clay soils. Geotechnique 33:107–126
BS 1377 (1990) Methods of testing for soils for civil engineering purposes. British Standards Institution, HMSO, London
Building Research Establishment Digest (1989) No 343
Building Research Establishment Digest (1990) No 251 Assessment of damage in low rise buildings
Building Research Establishment Digest (1993) No 240 parts 1–3 Low rise buildings on shrinkable clay
Building Research Establishment Digest (1993) No 386 Monitoring buildings and ground movement by precise levelling
Building Research Establishment Digest (1996) No 412
Building Research Station Digest (1949) No 3
Chandler RJ, Crilly MS, Montgomerry-Smith G (1992) A low cost method of assessing clay desiccation for low rise buildings. Proc Inst Civ Eng Civ Eng 92(2):82–89
Cheney JE (1988) 25 years’ heave of a building constructed on clay after tree removal. Ground Engineering July, 13–27
Cox DW (1985) The lateral extension of structures built on shrinkable shrinkable clays. In: Geddes JD (ed) Ground movements and structures, vol 4. Pentech Press, London, pp 519–533
Driscoll R (1983) The influence of vegetation on the swelling shrinkage of clay soils in Britain. Geotechnique 33:93–105
Fisher A (1998) The influence of vegetation on shrink/swell in the clays of the Lower Lias (Bristol District). Unpublished Ph.D thesis, University of Bristol, UK
Freeman TJ, Burford D, Crilly MS (1985) Seasonal foundation movements in London Clay. 485–501. In: Geddes JD (ed) Ground movements and structures, vol 4. Pentech Press, London
Grimaldi FS, Shapiro L, Schnepfe M (1966) Determination of carbon dioxide in limestone and dolomite acid base–base titration. US Geol Surv Prof Pap 550B:B186–B188
Holtz WG (1983) The influence of vegetation on the swelling and shrinking of clays in the United States of America. Geotechnique 33:159–163
National House Building Council (1985) Practice Note 3. Building near trees
National House Building Council (1986) Supplement to Practice Note 3 (1985) A quick way to find the right depth of foundations on clay soils
Richards BG, Peter P, Emerson WW (1983) The effects of vegetation on the swelling and shrinking of soils in Australia. Geotechnique 33:127–139
Samuels SG, Cheney JE (1974) Long-term heave of a building on clay due to tree removal. Conference on settlement of structures. Cambridge Pentech Press, London 212–220
Skempton AW (1954) A foundation failure due to clay shrinkage caused by poplar trees
Van der Merwe DH (1964) The prediction of heave from plasticity index and percentage clay fraction of soils. The Civil Engineer in South Africa 103–107
Ward WH (1954) Soil movement and weather. Proc 3rd Int Conf Soil Mech and Found Eng 4(31):477–482
Williams AAB, Pidgeon JT (1983) Evapotranspiration and heaving clays in South Africa. Geotechnique 33:140–150
Wyles R (1983) The legal aspects of the influence of vegetation on the swelling and shrinking of clays. Geotechnique 33:89–91
Acknowledgments
The authors thank Bristol Water for permission to set up the field experiment on their land and Marcus Hawkins for drawing the figures.
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Fisher, A., Hawkins, A.B. Effect of an oak tree on seasonal ground movements in the Lower Lias Clay, Bristol, UK. Bull Eng Geol Environ 71, 37–50 (2012). https://doi.org/10.1007/s10064-011-0407-2
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DOI: https://doi.org/10.1007/s10064-011-0407-2