4种乔木根系不同埋根方式根-土复合体的抗剪特性

doi:10.11707/j.1001-7488.20140914

Abstract

Abstract:

In order to explore the mechanical mechanism of arbors roots to prevent shallow landslide by holding water and soil, we selected root systems of diameter in 3, 5 and 7 mm of larch, pine, birch and Mongolia oak, and buried horizontally or vertically roots and buried horizontally and vertically roots to make into root-soil composite plots with a diameter of 101 mm in the soil with fixed water content and dry density conditions. Then a consolidated undrained (CU) test was conducted with an automatic triaxial compression tester by setting the confining pressure in 200, 400 and 600 kPa to evaluate the impact of buried-root modes and root diameters on the shear strength of the soil. The results showed that root-soil complex in shearing strength was significantly greater than pure soil, and the shear strength was in an order of: complex root complex> horizontal root complexes> vertical root complex. It was shown that the composite root in enhancing soil strength effect was most efficient, and thus, the composite root forest tree species would be the best in enhancing the soil strength to maintain soil stability.

Key words: tree roots, triaxial compression test, soil shear strength

CLC Number:

S714.7

Gai Xiaogang, Chen Lihua, Jiang Kunyun, Ji Wenxian. Shear Characteristic Research on Root-Soil Composite in Four Kinds of Roots of Trees and Different Root Buried Ways[J]. Scientia Silvae Sinicae, 2014, 50(9): 105-111.

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Shear Characteristic Research on Root-Soil Composite in Four Kinds of Roots of Trees and Different Root Buried Ways

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