Soil Improvement for Tree Stability

Studies by Rahardjo et al (2009, 2010) showed that trees grew in the soil mixtures (50 % Granite Chips – 50% Top Soil & 80 % Granite Chips – 20% Top Soil) as well as in the in-situ soil and top soil. In addition, laboratory works showed that shear strength of the soil mixtures was much higher than that of the top soil under the same relative compaction. The tree growth in the soil mixtures, however, was not hindered by the high shear strength of the soil mixtures.

Soil improvement for tree stability pull out test, Ow et al 2010

Soil improvement for tree stability pull out test results, Ow et al 2010

References

1. Rahardjo, H., Harnas, F. R., Indrawan, I. G. B., Leong, E. C., Tan, P. Y., Fong, Y. K. and Ow, L. F. (2014). “Understanding the stability of Samanea Saman trees through tree pulling, analytical calculations and numerical models.” Urban Forestry & Urban Greening, May, 13(2), 355-364. doi | handle
2. Indrawan, I. G. B., Rahardjo, H., Leong, E. C., Tan, P. Y., Fong, Y. K. and Sim, E. K. (2012). “Field instrumentation for monitoring of water, heat, and gas transfers through unsaturated soils.” Engineering Geology, October, 151, 24-36.doi | handle
3. Ow, L. F., Harnas, F. R., Indrawan, I. G. B., Sahadewa, A., Sim, E. K., Rahardjo, H., Leong, E. C., Fong, Y. K. and Tan, P. Y. (2010). “Tree-pulling experiment: an analysis into the mechanical stability of rain trees.” Trees, 24, 1007 – 1015. doi | handle
4. Rahardjo, H., Harnas, F. R., Leong, E. C., Tan, P. Y., Fong, Y. K. and Sim, E. K. (2009). “Tree stability in an improved soil to withstand wind loading.” Urban Forestry & Urban Greening, 8(4), 237-247. doi | handle
5. Rahardjo, H., Indrawan, I. G. B. and Harnas, F. R. (2010). Soil improvement for tree stability, Volume 1 of NTU-NParks Collaborative Research Report, Nanyang Technological University, Singapore, 183 pages. handle