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Effects of Root Properties and Branching Characteristics on Soil Reinforcement in the Jinyun Mountain, China


Affiliations
1 School of Soil and Water Conservation, Jinyun Forest Ecosystem Research Station, Beijing Forestry University, Beijing 100083, China
2 Jinyun Forest Ecosystem Research Station, Beijing Forestry University, Beijing 100083, China
3 China Academy of Transportation Sciences, Beijing 100029, China
 

Plant ischolar_mains can substantially improve slope stability and prevent soil slippage. Many researchers have quantified effects of ischolar_main properties on soil reinforcement. However, the mechanism of ischolar_main architecture on shear strength increments needed to be studied and analysed. This paper presents a man-made direct shear test to compare the effects of six tree species ischolar_mains on soil reinforcement. Thus, ischolar_main tensile strength, diameter, ischolar_main area ratio (RAR), inclination and distribution were measured to study the differences between ischolar_main architecture. Meanwhile, stress propagation simulations were conducted to analyse the mechanisms of ischolar_main architecture on soil reinforcement. Results showed that shear strength increment value corresponded to P. massoniana (42.4 kPa), followed by C. camphora (37.6 kPa), N. aurata (36.0 kPa), L. kwangtungensis (28.8 kPa), G. acuminata (27.4 kPa) and S. laurina (23.0 kPa). Root architecture that contained tapischolar_mains (VH-type) and widely distributed ischolar_mains (H-type) showed larger shear strength increments than that contained oblique ischolar_mains (R-type) when the initial friction between soil and ischolar_main was ignored. When there are thick, widely distributed ischolar_mains in the ischolar_main system, the resistance of ischolar_main architecture on shear failure would become larger. Root diameter class and RAR cannot be used to reflect the effects of ischolar_main architecture on soil shear strength increment. While estimating the different tree species ischolar_mains on soil reinforcement in field, initial friction between soil and ischolar_main should be considered as important as ischolar_main architecture.

Keywords

Root Architecture, Root Properties, Shear Test, Shear Strength Increment, Stress Propagation Simulation.
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  • Gray, D. H. and Robbin, B. S., Biotechnical and Soil Bioengineering Slope Stabilization: A Practical Guide for Erosion Control, John Wiley, 1996.

  • Waldron, L. J., The shear resistance of ischolar_main-permeated homogeneous and stratified soil. Soil Sci. Soc. Am. J., 1977, 41(5), 843–849.

  • Ziemer, R. R., Roots and the stability of forested slopes. Erosion and Sediment Transport in Pacific Rim Steeplands, IAHS Publ. no. 132, Christchurch, New Zealand, 1981, pp. 343–361.

  • Nilaweera, N. S. and Nutalaya, P., Role of tree ischolar_mains in lope stabilization. B. Eng. Geol. Environ., 1999, 57, 337–342.

  • Greenway, D. R., Vegetation and Slope Stability, John Wiley & Sons, 1987.

  • Gyssels, G., Poesen, J., Bochet, E. and Li, Y., Impact of plant ischolar_mains on the resistance of soils to erosion by water: a review. Prog. Phys. Geog., 2005, 29(2), 189–217.

  • Stokes, A., Atger, C., Bengough, A. G., Fourcaud, T. and Sidle, R. C., Desirable plant ischolar_main traits for protecting natural and engineered slopes against landslides. Plant Soil, 2009, 324(1–2), 1–30.

  • Cohen, D., Schwarz, M. and Or, D., An analytical fiber bundle model for pullout mechanics of ischolar_main bundles. J. Geophys. Res., 2011, 116, F03010; doi:10.1029/2010JF001886.

  • Fan, C. C. and Chen, Y. W., The effect of ischolar_main architecture on the shearing resistance of ischolar_main-permeated soils. Ecol. Eng., 2010, 36(6), 813–826.

  • Reubens, B., Poesen, J., Danjon, F., Geudens, G.. and Muys, B., The role of fine and coarse ischolar_mains in shallow slope stability and soil erosion control with a focus on ischolar_main system architecture: a review. Trees, 2007, 21(4), 385–402.

  • Wu, T. H., McKinnell III, W. P. and Swanston, D. N., Strength of tree ischolar_mains and landslides on Prince of Wales Island, Alaska. Can. Geotech. J., 1979, 16(1), 19–33.

  • Docker, B. B. and Hubble, T. C. T., Quantifying ischolar_mainreinforcement of river bank soils by four Australian tree species. Geomorphology, 2008, 100(3), 401–418.

  • Fan, C. C. and Su, C. F., Role of ischolar_mains in the shear strength of ischolar_main-reinforced soils with high moisture content. Ecol. Eng., 2008, 33(2), 157–166.

  • Pollen, N. and Simon, A., Estimating the mechanical effects of riparian vegetation on streambank stability using a fiber bundle model. Water Resour. Res., 2005, 41, 1–11.

  • Mickovski, S. B., Stokes, A., Van Beek, R., Ghestem, M. and Fourcaud, T., Simulation of direct shear tests on ischolar_mained and nonischolar_mained soil using finite element analysis. Ecol. Eng., 2011, 37(10), 1523–1532.

  • Greenwood, J. R., SLIP4EX – a program for routine slope stability analysis to include the effects of vegetation, reinforcement and hydrological changes. Geotech. Geol. Eng., 2006, 24, 449–465.

  • Giadrossich, F., Schwarz, M., Cohen, D., Preti, F. and Or, D., Mechanical interactions between neighboring ischolar_mains during pullout tests. Plant Soil, 2013, 367(1–2), 391–406.

  • Yen, C. P., Tree ischolar_main patterns and erosion control. In Proceedings of the International Workshop on Soil Erosion and its Counter-measures (ed. Jantawat, S.), Soil and Water Conservation Society of Thailand, Bangkok, 1987.

  • Prasad, A., Kazemian, S., Kalantari, B., Huat, B. B. and Mafian, S., Stability of tropical residual soil slope reinforced by live pole: experimental and numerical investigations. Arab. J. Sci. Eng., 2012, 37(3), 601–618.

  • FAO, I., World reference base for soil resources. World Soil Resour. Rep., 1998, 84, 21–22.

  • Operstein, V. and Frydman, S., The influence of vegetation on soil strength. Proc. Inst. Civ. Eng. Ground Improv., 2000, 4(2), 81–89.

  • Fan, C. C. and Lai, Y. F., Influence of the spatial layout of vegetation on the stability of slopes. Plant Soil, 2014, 377(1–2), 83–95.

  • Bischetti, G. B, Chiaradia. E. A., Simonato, T., Speziali, B., Vitali, B., Vullo, P. and Zocco, A., Root strength and ischolar_main area ratio of forest species in Lombardy (Northern Italy). Plant Soil, 2005, 278(1–2), 11–22.

  • Ghestem, M., Sidle, R. C. and Stokes, A., The influence of plant ischolar_main systems on subsurface flow: implications for slope stability. BioScience, 2011, 61(11), 869–879.

  • Genet, M., Stokes, A., Salin, F., Mickovski, S. B., Fourcaud, T., Dumail, J. F. and van Beek, R., The influence of cellulose content on tensile strength in tree ischolar_mains. Plant Soil, 2005, 278(1–2), 1–9.

  • Burylo, M., Hudek, C. and Rey, F., Soil reinforcement by the ischolar_mains of six dominant species on eroded mountainous marly slopes (Southern Alps, France). Catena, 2011, 84(1), 70–78.

  • Craine, J., Competition for nutrients and optimal ischolar_main allocation. Plant Soil, 2006, 285, 171–185.

  • Zobel, R. W., Primary and secondary ischolar_main systems. Root and soil management: interaction between ischolar_mains and the soil. Agronomy Monograph, 2005, 48, 3–14.

  • Yan, Z. X., Yan, C. M. and Wang, H. Y., Mechanical interaction between ischolar_mains and soil mass in slope vegetation. Sci. China Technol. Sci., 2010, 53(11), 3039–3044.

  • Yan, Z. X., Song, Y., Jiang, P. and Wang, H. Y., Mechanical analysis of interaction between plant ischolar_mains and rock and soil mass in slope vegetation. Appl. Math. Mech., 2010, 31, 617–622.

  • Schwarz, M., Cohen, D. and Or, D., Spatial characterization of ischolar_main reinforcement at stand scale: theory and case study. Geomorphology, 2012, 171, 190–200.

  • Hodge, A., The plastic plant: ischolar_main responses to heterogeneous supplies of nutrients. New Phytol., 2004, 162, 9–24.


Abstract Views: 465

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  • Effects of Root Properties and Branching Characteristics on Soil Reinforcement in the Jinyun Mountain, China

Abstract Views: 465  |  PDF Views: 138

Authors

Shuangshuang Song
School of Soil and Water Conservation, Jinyun Forest Ecosystem Research Station, Beijing Forestry University, Beijing 100083, China
Yunqi Wang
Jinyun Forest Ecosystem Research Station, Beijing Forestry University, Beijing 100083, China
Baoping Sun
School of Soil and Water Conservation, Jinyun Forest Ecosystem Research Station, Beijing Forestry University, Beijing 100083, China
Yunpeng Li
China Academy of Transportation Sciences, Beijing 100029, China

Abstract


Plant ischolar_mains can substantially improve slope stability and prevent soil slippage. Many researchers have quantified effects of ischolar_main properties on soil reinforcement. However, the mechanism of ischolar_main architecture on shear strength increments needed to be studied and analysed. This paper presents a man-made direct shear test to compare the effects of six tree species ischolar_mains on soil reinforcement. Thus, ischolar_main tensile strength, diameter, ischolar_main area ratio (RAR), inclination and distribution were measured to study the differences between ischolar_main architecture. Meanwhile, stress propagation simulations were conducted to analyse the mechanisms of ischolar_main architecture on soil reinforcement. Results showed that shear strength increment value corresponded to P. massoniana (42.4 kPa), followed by C. camphora (37.6 kPa), N. aurata (36.0 kPa), L. kwangtungensis (28.8 kPa), G. acuminata (27.4 kPa) and S. laurina (23.0 kPa). Root architecture that contained tapischolar_mains (VH-type) and widely distributed ischolar_mains (H-type) showed larger shear strength increments than that contained oblique ischolar_mains (R-type) when the initial friction between soil and ischolar_main was ignored. When there are thick, widely distributed ischolar_mains in the ischolar_main system, the resistance of ischolar_main architecture on shear failure would become larger. Root diameter class and RAR cannot be used to reflect the effects of ischolar_main architecture on soil shear strength increment. While estimating the different tree species ischolar_mains on soil reinforcement in field, initial friction between soil and ischolar_main should be considered as important as ischolar_main architecture.

Keywords


Root Architecture, Root Properties, Shear Test, Shear Strength Increment, Stress Propagation Simulation.

References





DOI: https://doi.org/10.18520/cs%2Fv114%2Fi06%2F1250-1260