Reinforcing and Toughening Effect of Plant Fine Roots on the Soil

DOI

10.2991/ccit-14.2014.83How to use a DOI?

Keywords

root-soil complex, shear strength, toughness, plasticity

Abstract

In the prevention of soil erosion, vegetation is an economical and environmentally friendly control methods, the most basic indicators of the plant protection design is solid soil function of plant roots. From the perspective of composite the fine rooted soil as a kind of special composite materials, the fine roots as the reinforcement material, using fracture mechanics theory the paper analyzes the enhancements and toughening effect of roots on the soil in order to illustrate the mechanism of solid soil and protection slope of plant roots. At different stages of loading the bridging effect of root has different manifestations, during the micro-crack propagation the bridging effect of root as follows: an equivalent closure role imposed on the expansion of micro-cracks, the stress concentration of micro-cracks cutting-edge can be passivated, the stress distribution more uniform, increasing the shear capacity of the soil; during the macro-crack propagation the bridging effect of root as follows: the roots across crack gradually pulled out to prevent cracking or crack propagation, crack propagation must consume a large amount of energy, thereby increasing the strength and toughness of the composite soil. Due to matrix cracking the load transferred to roots, by stress proliferation the load is passed to the soil surrounding roots. while its stress reached peak, soil had strain strengthening characteristics with the strength, toughness and plastic of composite soil having been greatly improved. Finally, it was verified by numerical simulation and laboratory test of the direct shear tests.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - YunYan Zhou
AU  - Kun Xu
AU  - JianPing Chen
AU  - XiaoMei Wang
PY  - 2014/01
DA  - 2014/01
TI  - Reinforcing and Toughening Effect of Plant Fine Roots on the Soil
BT  - Proceedings of the 2014 International Conference on Computer, Communications and Information Technology
PB  - Atlantis Press
SP  - 317
EP  - 322
SN  - 1951-6851
UR  - https://doi.org/10.2991/ccit-14.2014.83
DO  - 10.2991/ccit-14.2014.83
ID  - Zhou2014/01
ER  -