EFFECT OF TREE ROOT DIAMETER ON COHESION AND INTERNAL FRICTION ANGLE OF SOIL

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DAVOUDI MOHAMMAD HADI

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Journal: JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH Year:2006 | Volume:7 | Issue:28 Page(s): 53-68

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Information Journal Paper

Title

EFFECT OF TREE ROOT DIAMETER ON COHESION AND INTERNAL FRICTION ANGLE OF SOIL

Author(s)

DAVOUDI MOHAMMAD HADI | Issue Writer Certificate

Keywords

COHESIONQ4

DIRECT SHEAR TESTQ3

INTERNAL FRICTION ANGLEQ3

ROOT DIAMETERQ4

SHEAR RESISTANCEQ3

Abstract

From the environmental point of view, application of bioengineering techniques in civil projects such as landslide stabilization is given priority in recent years. In this paper, the influence of the diameter of tree roots on the increase of SHEAR RESISTANCE of soil was investigated by means of series of in-situ DIRECT SHEAR TESTs. Thirty tests were carried out on a natural deposit CL soil containing midow roots by means of a set up designed in soil laboratory of SCWMRI. Since the existing roots in natural deposits have different diameters, a no dimensional index referred to as ROOT DIAMETER Ratio (RDR) was defined as the ratio of the mean ROOT DIAMETER to the maximum ROOT DIAMETER. The results showed, in general, the increased SHEAR RESISTANCE of the soil due to the presence of roots was inversely proportional to the ROOT DIAMETERs. In fact the apparent COHESION of soil increases considerably as the ROOT DIAMETER increases, while at the same time the INTERNAL FRICTION ANGLE decreases smoothly. However, the SHEAR RESISTANCE growth stops at a given diameter, then stabilizes after a slight declination. A similar behavior was observed for the soil COHESION, while the INTERNAL FRICTION ANGLE showed a completely opposite behavior.

Cites

EFFECT OF DIAMETER AND DENSITY OF WILLOW ROOTS ON SHEAR RESISTANCE OF SOILS

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APA: Copy

DAVOUDI, MOHAMMAD HADI. (2006). EFFECT OF TREE ROOT DIAMETER ON COHESION AND INTERNAL FRICTION ANGLE OF SOIL. JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, 7(28), 53-68. SID. https://sid.ir/paper/28182/en

Vancouver: Copy

DAVOUDI MOHAMMAD HADI. EFFECT OF TREE ROOT DIAMETER ON COHESION AND INTERNAL FRICTION ANGLE OF SOIL. JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH[Internet]. 2006;7(28):53-68. Available from: https://sid.ir/paper/28182/en

IEEE: Copy

MOHAMMAD HADI DAVOUDI, “EFFECT OF TREE ROOT DIAMETER ON COHESION AND INTERNAL FRICTION ANGLE OF SOIL,” JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, vol. 7, no. 28, pp. 53–68, 2006, [Online]. Available: https://sid.ir/paper/28182/en

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