Axial stress–strain relationships of fine roots of Beech and Larch in loading to failure and in cyclic loading

Makarova, Olga; Cofie, P.; Koolen, A.J.

doi:10.1016/s0933-3630(97)00017-2

Cited by 19 publications

(10 citation statements)

References 4 publications

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“…The material is in that sense rather limited and we cannot be sure whether all findings and relationships are valid in all kinds of pine bogs. The results were nevertheless logical and in accordance with the earlier findings on the significance of roots to bearing capacity (Makarova et al 1998;Cofie et al 2000).…”

Section: Discussionsupporting

confidence: 91%

“…The significance of roots in composing the bearing capacity of peatland has been discussed earlier (Makarova et al 1998;Cofie et al 2000). The present study gave further insight to the question.…”

Section: Discussionsupporting

confidence: 59%

“…The form of the stress-strain curve of roots has been found to be independent of the diameter of roots but the incremental plastic strain in cyclic loading tends to decrease with increasing root diameter (Makarova et al 1998). The strength of peat is dependent on water content and the extent of decomposition.…”

Section: Introductionmentioning

confidence: 98%

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The significance of above-ground biomass, moisture content and mechanical properties of peat layer on the bearing capacity of ditched pine bogs

Uusitalo¹,

Ala‐Ilomäki²

2013

Silva Fenn.

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The significance of above-ground biomass, moisture content and mechanical properties of peat layer on the bearing capacity of ditched pine bogs Uusitalo J., Ala-Ilomäki J. (2013). The significance of above-ground biomass, moisture content and mechanical properties of peat layer on the bearing capacity of ditched pine bogs. Silva Fennica vol. 47 no. 3 article id 993. 18 p. AbstractIntensive utilisation of peatland forests calls for logging activities to be increasingly carried out in conditions other than those in harsh winter. The low bearing capacity of peatlands forms a severe obstacle for the prevailing harvesting machinery. The aim of this study was to clarify and quantify the significance of above-ground biomass, brash mat, moisture content and mechanical properties of peat layer on the bearing capacity of pine bogs. In-situ driving tests were conducted in Western Finland on a pine bog covering a large variation of growing stock. Portable tools were tested for measuring strength properties of the top layer of peat. According to the results, shear modulus of top layer of peat, volume of trees and the existence of cutting debris are the most important factors affecting bearing capacity. Spiked shear vane was shown to be a promising tool in predicting the strength properties of peat soil.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 59%

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The significance of above-ground biomass, moisture content and mechanical properties of peat layer on the bearing capacity of ditched pine bogs

Uusitalo¹,

Ala‐Ilomäki²

2013

Silva Fenn.

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“…The fine-root with load-destruction test of Fagus hayatae and Larix gmelini [19] presented the relationship of axil force and strain in the form of the water contain of root soil with the destructive strain, and the pulling rate with the stress [8]. Nondestructive dry-matter estimation methods have been developed to estimate dry materials of leaves using a regression model.…”

Section: Introductionmentioning

confidence: 99%

Evaluation on Nondestructive Plant Strength for Typhoon and Earthquake Areas in Taiwan

Cui¹,

Liang²

2016

AJBIO

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Abstract:In this study need to construct the criteria of landslide area protection for the selected vegetation materials in considering their characteristics and the soil solidities for the root system. Selection three pioneer plants, India-charcoal Trema, Formosan alder and Roxburgh sumac, doing destructive pulling resistance test. By the weight of plant above the ground, weight of root-soil, and get non-destructive resistance models. With the diameter of the tree just above the ground, were derived with multi-variable regression analysis, respectively. The models gave higher statistical regression coefficients when they were compared with the results of relative researches. The significant level factors to influence the plant pulling resistance capacity are climate and soil properties that fitting models of root strength provided the quantitative prediction on slope stability in the landslide areas.

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“…These two structures, control the major mechanisms of stability such as soil reinforcement, soil arching and defense and root anchoring (Nilaweera and Nutalaya, 1999). Soil reinforcement increased by the presence of vegetation roots (Makarova et al, 1998) due to the fact that soil cohesion, increase with the presence of vegetation as well as the increase in soil shear strength (Cazzuffi et al, 2006) Plant root affords further cohesion to the soil and root-permeated soils are hence much stronger than soils alone to survive soil damage procedures such as mass movements. Soil reinforcement due to the roots are influenced by numerous variables, including root systems such as root distribution with depth, root distribution over different root diameter classes and root tensile strength (Nicoll and Ray, 1996;Li et al, 2007;De Baets et al, 2008;Sun et al, 2008;Stokes et al, 2009;Loades et al, 2010;Burylo et al, 2011), root number, root diameter (Wu et al, 1979), root architecture (Duputy et al, 2005) and pullout resistance (Nilaweera and Nutalaya, 1999).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Root Distribution and Tensile Strength of Acacia mangium Willd (Fabaceae) in the Rainforest

Lateh¹,

Avani²,

Ghassem³

2014

GJBS

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The purpose of this study is to complement the existing body of knowledge on the root system of tropical plants and their contribution to slope stability. For this reason, four trees of Acacia mangium selected as randomly in rainforest along East-West Highway, Malaysia. Root area ratio (RAR) and tensile strength (Tr) data were collected and analyzed. RAR data were measured with the whole root system and Tr were measured by individual roots. The results showed that there is a power law equation between root diameter and Tr, with an average of 44.11 Mpa (in average root diameter of 0.9mm). There was a wide variation in the RAR in relation to soil depth. Generally, RAR reduced with the increasing soil depth. Similarly, additional cohesion by plant roots conducted by Tr and RAR. In conclusion, in order to assess soil reinforcement by vegetation roots, root distribution and tensile strength data with soil depth in different vegetation and sites is necessary.

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Axial stress–strain relationships of fine roots of Beech and Larch in loading to failure and in cyclic loading

Cited by 19 publications

References 4 publications

The significance of above-ground biomass, moisture content and mechanical properties of peat layer on the bearing capacity of ditched pine bogs

The significance of above-ground biomass, moisture content and mechanical properties of peat layer on the bearing capacity of ditched pine bogs

Evaluation on Nondestructive Plant Strength for Typhoon and Earthquake Areas in Taiwan

Investigation of Root Distribution and Tensile Strength of Acacia mangium Willd (Fabaceae) in the Rainforest

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