The shear strength increase provided by root system of three plant species（Linden hibiscus、Japannese mallotus, and China berry-tree）

• Main Authors: Chia-Pin Hsu, 許家賓
• Other Authors: Chia-Cheng Fan
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/28891958012255857820

碩士 === 國立高雄第一科技大學 === 營建工程所 === 96 === This research attempts to discuss three kind of plant root system growth state to provide the shearing strength increase with it the relations, plants by the achievement lives carries on plant of choice reference the stability of slope processing. The in situ direct shear test took root reinforced soil mass with vegetation（Linden hibiscus、Japannese mallotus, and China berry-tree） and soil mass without roots, and controls the soil moisture content in 12~14%. After test, investigation of plants roots, soil test, and tensile test for plants roots. In computation overall roots of plant，the result estimated the increment of peak shear strength (ΔS) offered by vegetation (Linden hibiscus) was around 9.1% of the root tensile strength (tR)；the increment of peak shear strength (ΔS) offered by vegetation (Japannese mallotus) was around 12.8% of the root tensile strength (tR)；the increment of peak shear strength (ΔS) offered by vegetation (China berry-tree) was around 9.6% of the root tensile strength (tR). The computation of roots which pass the shear cross-section only, the result estimated the increment of peak shear strength (ΔS) offered by vegetation (Linden hibiscus) was around 1.34% of the root tensile strength (tR)；the increment of peak shear strength (ΔS) offered by vegetation （Japannese mallotus）was around 24.1% of the root tensile strength (tR)；the increment of peak shear strength (ΔS) offered by vegetation (China berry-tree) was around 1.49% of the root tensile strength (tR). Plant root morphology have an top root of vegetation（Japannese mallotus）better than by the lateral root primarily of vegetation（Linden hibiscus、China berry-tree）on increase of shearing strength of roots.